1 // Licensed to the .NET Foundation under one or more agreements.
2 // The .NET Foundation licenses this file to you under the MIT license.
3 // See the LICENSE file in the project root for more information.
5 /*XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
6 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
10 XX This is the node in the semantic tree graph. It represents the operation XX
11 XX corresponding to the node, and other information during code-gen. XX
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14 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
17 /*****************************************************************************/
20 /*****************************************************************************/
22 #include "vartype.h" // For "var_types"
23 #include "target.h" // For "regNumber"
24 #include "ssaconfig.h" // For "SsaConfig::RESERVED_SSA_NUM"
26 #include "valuenumtype.h"
27 #include "simplerhash.h"
31 // Debugging GenTree is much easier if we add a magic virtual function to make the debugger able to figure out what type it's got.
32 // This is enabled by default in DEBUG. To enable it in RET builds (temporarily!), you need to change the build to define DEBUGGABLE_GENTREE=1,
33 // as well as pass /OPT:NOICF to the linker (or else all the vtables get merged, making the debugging value supplied by them useless).
34 // See protojit.nativeproj for a commented example of setting the build flags correctly.
35 #ifndef DEBUGGABLE_GENTREE
37 #define DEBUGGABLE_GENTREE 1
39 #define DEBUGGABLE_GENTREE 0
41 #endif // !DEBUGGABLE_GENTREE
43 // The SpecialCodeKind enum is used to indicate the type of special (unique)
44 // target block that will be targeted by an instruction.
46 // GenTreeBoundsChk nodes (SCK_RNGCHK_FAIL, SCK_ARG_EXCPN, SCK_ARG_RNG_EXCPN)
47 // - these nodes have a field (gtThrowKind) to indicate which kind
48 // GenTreeOps nodes, for which codegen will generate the branch
49 // - it will use the appropriate kind based on the opcode, though it's not
50 // clear why SCK_OVERFLOW == SCK_ARITH_EXCPN
51 // SCK_PAUSE_EXEC is not currently used.
56 SCK_RNGCHK_FAIL, // target when range check fails
57 SCK_PAUSE_EXEC, // target to stop (e.g. to allow GC)
58 SCK_DIV_BY_ZERO, // target for divide by zero (Not used on X86/X64)
59 SCK_ARITH_EXCPN, // target on arithmetic exception
60 SCK_OVERFLOW = SCK_ARITH_EXCPN, // target on overflow
61 SCK_ARG_EXCPN, // target on ArgumentException (currently used only for SIMD intrinsics)
62 SCK_ARG_RNG_EXCPN, // target on ArgumentOutOfRangeException (currently used only for SIMD intrinsics)
66 /*****************************************************************************/
68 DECLARE_TYPED_ENUM(genTreeOps,BYTE)
70 #define GTNODE(en,sn,cm,ok) GT_ ## en,
75 // GT_CNS_NATIVELONG is the gtOper symbol for GT_CNS_LNG or GT_CNS_INT, depending on the target.
76 // For the 64-bit targets we will only use GT_CNS_INT as it used to represent all the possible sizes
77 // For the 32-bit targets we use a GT_CNS_LNG to hold a 64-bit integer constant and GT_CNS_INT for all others.
78 // In the future when we retarget the JIT for x86 we should consider eliminating GT_CNS_LNG
81 GT_CNS_NATIVELONG = GT_CNS_INT,
83 GT_CNS_NATIVELONG = GT_CNS_LNG,
86 END_DECLARE_TYPED_ENUM(genTreeOps,BYTE)
88 /*****************************************************************************
90 * The following enum defines a set of bit flags that can be used
91 * to classify expression tree nodes. Note that some operators will
92 * have more than one bit set, as follows:
94 * GTK_CONST implies GTK_LEAF
95 * GTK_RELOP implies GTK_BINOP
96 * GTK_LOGOP implies GTK_BINOP
101 GTK_SPECIAL = 0x0000, // unclassified operator (special handling reqd)
103 GTK_CONST = 0x0001, // constant operator
104 GTK_LEAF = 0x0002, // leaf operator
105 GTK_UNOP = 0x0004, // unary operator
106 GTK_BINOP = 0x0008, // binary operator
107 GTK_RELOP = 0x0010, // comparison operator
108 GTK_LOGOP = 0x0020, // logical operator
109 GTK_ASGOP = 0x0040, // assignment operator
111 GTK_KINDMASK= 0x007F, // operator kind mask
113 GTK_COMMUTE = 0x0080, // commutative operator
115 GTK_EXOP = 0x0100, // Indicates that an oper for a node type that extends GenTreeOp (or GenTreeUnOp)
116 // by adding non-node fields to unary or binary operator.
118 GTK_LOCAL = 0x0200, // is a local access (load, store, phi)
120 /* Define composite value(s) */
122 GTK_SMPOP = (GTK_UNOP|GTK_BINOP|GTK_RELOP|GTK_LOGOP)
125 /*****************************************************************************/
127 #define SMALL_TREE_NODES 1
129 /*****************************************************************************/
131 DECLARE_TYPED_ENUM(gtCallTypes,BYTE)
133 CT_USER_FUNC, // User function
134 CT_HELPER, // Jit-helper
135 CT_INDIRECT, // Indirect call
137 CT_COUNT // fake entry (must be last)
139 END_DECLARE_TYPED_ENUM(gtCallTypes,BYTE)
142 /*****************************************************************************/
146 struct InlineCandidateInfo;
148 /*****************************************************************************/
150 // GT_FIELD nodes will be lowered into more "code-gen-able" representations, like
151 // GT_IND's of addresses, or GT_LCL_FLD nodes. We'd like to preserve the more abstract
152 // information, and will therefore annotate such lowered nodes with FieldSeq's. A FieldSeq
153 // represents a (possibly) empty sequence of fields. The fields are in the order
154 // in which they are dereferenced. The first field may be an object field or a struct field;
155 // all subsequent fields must be struct fields.
158 CORINFO_FIELD_HANDLE m_fieldHnd;
159 FieldSeqNode* m_next;
161 FieldSeqNode(CORINFO_FIELD_HANDLE fieldHnd, FieldSeqNode* next) : m_fieldHnd(fieldHnd), m_next(next) {}
163 // returns true when this is the pseudo #FirstElem field sequence
164 bool IsFirstElemFieldSeq();
166 // returns true when this is the pseudo #ConstantIndex field sequence
167 bool IsConstantIndexFieldSeq();
169 // returns true when this is the the pseudo #FirstElem field sequence or the pseudo #ConstantIndex field sequence
170 bool IsPseudoField();
172 // Make sure this provides methods that allow it to be used as a KeyFuncs type in SimplerHash.
173 static int GetHashCode(FieldSeqNode fsn)
175 return static_cast<int>(reinterpret_cast<intptr_t>(fsn.m_fieldHnd)) ^ static_cast<int>(reinterpret_cast<intptr_t>(fsn.m_next));
178 static bool Equals(FieldSeqNode fsn1, FieldSeqNode fsn2)
180 return fsn1.m_fieldHnd == fsn2.m_fieldHnd && fsn1.m_next == fsn2.m_next;
184 // This class canonicalizes field sequences.
187 typedef SimplerHashTable<FieldSeqNode, /*KeyFuncs*/FieldSeqNode, FieldSeqNode*, JitSimplerHashBehavior> FieldSeqNodeCanonMap;
190 FieldSeqNodeCanonMap* m_canonMap;
192 static FieldSeqNode s_notAField; // No value, just exists to provide an address.
194 // Dummy variables to provide the addresses for the "pseudo field handle" statics below.
195 static int FirstElemPseudoFieldStruct;
196 static int ConstantIndexPseudoFieldStruct;
199 FieldSeqStore(IAllocator* alloc);
201 // Returns the (canonical in the store) singleton field sequence for the given handle.
202 FieldSeqNode* CreateSingleton(CORINFO_FIELD_HANDLE fieldHnd);
204 // This is a special distinguished FieldSeqNode indicating that a constant does *not*
205 // represent a valid field sequence. This is "infectious", in the sense that appending it
206 // (on either side) to any field sequence yields the "NotAField()" sequence.
207 static FieldSeqNode* NotAField() { return &s_notAField; }
209 // Returns the (canonical in the store) field sequence representing the concatenation of
210 // the sequences represented by "a" and "b". Assumes that "a" and "b" are canonical; that is,
211 // they are the results of CreateSingleton, NotAField, or Append calls. If either of the arguments
212 // are the "NotAField" value, so is the result.
213 FieldSeqNode* Append(FieldSeqNode* a, FieldSeqNode* b);
215 // We have a few "pseudo" field handles:
217 // This treats the constant offset of the first element of something as if it were a field.
218 // Works for method table offsets of boxed structs, or first elem offset of arrays/strings.
219 static CORINFO_FIELD_HANDLE FirstElemPseudoField;
221 // If there is a constant index, we make a psuedo field to correspond to the constant added to
222 // offset of the indexed field. This keeps the field sequence structure "normalized", especially in the
223 // case where the element type is a struct, so we might add a further struct field offset.
224 static CORINFO_FIELD_HANDLE ConstantIndexPseudoField;
226 static bool IsPseudoField(CORINFO_FIELD_HANDLE hnd)
228 return hnd == FirstElemPseudoField || hnd == ConstantIndexPseudoField;
234 /*****************************************************************************/
236 typedef struct GenTree * GenTreePtr;
237 struct GenTreeArgList;
239 // Forward declarations of the subtypes
240 #define GTSTRUCT_0(fn, en) struct GenTree##fn;
241 #define GTSTRUCT_1(fn, en) struct GenTree##fn;
242 #define GTSTRUCT_2(fn, en, en2) struct GenTree##fn;
243 #define GTSTRUCT_3(fn, en, en2, en3) struct GenTree##fn;
244 #define GTSTRUCT_4(fn, en, en2, en3, en4) struct GenTree##fn;
245 #define GTSTRUCT_N(fn, ...) struct GenTree##fn;
246 #include "gtstructs.h"
248 /*****************************************************************************/
251 #include <pshpack4.h>
256 // We use GT_STRUCT_0 only for the category of simple ops.
257 #define GTSTRUCT_0(fn, en) GenTree##fn* As##fn() \
259 assert(this->OperIsSimple()); \
260 return reinterpret_cast<GenTree##fn*>(this); \
262 GenTree##fn& As##fn##Ref() { return *As##fn(); } \
263 __declspec(property(get=As##fn##Ref)) GenTree##fn& gt##fn;
264 #define GTSTRUCT_1(fn, en) GenTree##fn* As##fn() \
266 assert(this->gtOper == en); \
267 return reinterpret_cast<GenTree##fn*>(this); \
269 GenTree##fn& As##fn##Ref() { return *As##fn(); } \
270 __declspec(property(get=As##fn##Ref)) GenTree##fn& gt##fn;
271 #define GTSTRUCT_2(fn, en, en2) GenTree##fn* As##fn() \
273 assert(this->gtOper == en || this->gtOper == en2); \
274 return reinterpret_cast<GenTree##fn*>(this); \
276 GenTree##fn& As##fn##Ref() { return *As##fn(); } \
277 __declspec(property(get=As##fn##Ref)) GenTree##fn& gt##fn;
278 #define GTSTRUCT_3(fn, en, en2, en3) GenTree##fn* As##fn() \
280 assert(this->gtOper == en || this->gtOper == en2 || this->gtOper == en3); \
281 return reinterpret_cast<GenTree##fn*>(this); \
283 GenTree##fn& As##fn##Ref() { return *As##fn(); } \
284 __declspec(property(get=As##fn##Ref)) GenTree##fn& gt##fn;
286 #define GTSTRUCT_4(fn, en, en2, en3, en4) GenTree##fn* As##fn() \
288 assert(this->gtOper == en || this->gtOper == en2 || this->gtOper == en3 || this->gtOper == en4); \
289 return reinterpret_cast<GenTree##fn*>(this); \
291 GenTree##fn& As##fn##Ref() { return *As##fn(); } \
292 __declspec(property(get=As##fn##Ref)) GenTree##fn& gt##fn;
295 // VC does not optimize out this loop in retail even though the value it computes is unused
296 // so we need a separate version for non-debug
297 #define GTSTRUCT_N(fn, ...) GenTree##fn* As##fn() \
299 genTreeOps validOps[] = {__VA_ARGS__}; \
300 bool found = false; \
301 for (unsigned i=0; i<ArrLen(validOps); i++) { \
302 if (this->gtOper == validOps[i]) \
309 return reinterpret_cast<GenTree##fn*>(this); \
311 GenTree##fn& As##fn##Ref() { return *As##fn(); } \
312 __declspec(property(get=As##fn##Ref)) GenTree##fn& gt##fn;
314 #define GTSTRUCT_N(fn, ...) GenTree##fn* As##fn() \
316 return reinterpret_cast<GenTree##fn*>(this); \
318 GenTree##fn& As##fn##Ref() { return *As##fn(); } \
319 __declspec(property(get=As##fn##Ref)) GenTree##fn& gt##fn;
322 #include "gtstructs.h"
324 genTreeOps gtOper; // enum subtype BYTE
325 var_types gtType; // enum subtype BYTE
327 genTreeOps OperGet() const { return gtOper; }
328 var_types TypeGet() const { return gtType; }
331 genTreeOps gtOperSave; // Only used to save gtOper when we destroy a node, to aid debugging.
338 #define IS_CSE_INDEX(x) (x != 0)
339 #define IS_CSE_USE(x) (x > 0)
340 #define IS_CSE_DEF(x) (x < 0)
341 #define GET_CSE_INDEX(x) ((x > 0) ? x : -x)
342 #define TO_CSE_DEF(x) (-x)
344 signed char gtCSEnum; // 0 or the CSE index (negated if def)
345 // valid only for CSE expressions
347 #endif // FEATURE_ANYCSE
350 unsigned short gtAssertionNum; // 0 or Assertion table index
351 // valid only for non-GT_STMT nodes
353 bool HasAssertion() const { return gtAssertionNum != 0; }
354 void ClearAssertion() { gtAssertionNum = 0; }
356 unsigned short GetAssertion() const { return gtAssertionNum; }
357 void SetAssertion(unsigned short value) { assert((unsigned short)value == value); gtAssertionNum = (unsigned short)value; }
361 #if FEATURE_STACK_FP_X87
362 unsigned char gtFPlvl; // x87 stack depth at this node
363 void gtCopyFPlvl(GenTree * other) { gtFPlvl = other->gtFPlvl; }
364 void gtSetFPlvl(unsigned level) { noway_assert(FitsIn<unsigned char>(level)); gtFPlvl = (unsigned char)level; }
365 #else // FEATURE_STACK_FP_X87
366 void gtCopyFPlvl(GenTree * other) { }
367 void gtSetFPlvl(unsigned level) { }
368 #endif // FEATURE_STACK_FP_X87
371 // Cost metrics on the node. Don't allow direct access to the variable for setting.
377 // You are not allowed to read the cost values before they have been set in gtSetEvalOrder().
378 // Keep track of whether the costs have been initialized, and assert if they are read before being initialized.
379 // Obviously, this information does need to be initialized when a node is created.
380 // This is public so the dumpers can see it.
382 bool gtCostsInitialized;
385 #define MAX_COST UCHAR_MAX
386 #define IND_COST_EX 3 // execution cost for an indirection
388 __declspec(property(get=GetCostEx))
389 unsigned char gtCostEx; // estimate of expression execution cost
391 __declspec(property(get=GetCostSz))
392 unsigned char gtCostSz; // estimate of expression code size cost
394 unsigned char GetCostEx() const { assert(gtCostsInitialized); return _gtCostEx; }
395 unsigned char GetCostSz() const { assert(gtCostsInitialized); return _gtCostSz; }
397 // Set the costs. They are always both set at the same time.
398 // Don't use the "put" property: force calling this function, to make it more obvious in the few places
399 // that set the values.
400 // Note that costs are only set in gtSetEvalOrder() and its callees.
401 void SetCosts(unsigned costEx, unsigned costSz)
403 assert(costEx != (unsigned)-1); // looks bogus
404 assert(costSz != (unsigned)-1); // looks bogus
405 INDEBUG(gtCostsInitialized = true;)
407 _gtCostEx = (costEx > MAX_COST) ? MAX_COST : (unsigned char)costEx;
408 _gtCostSz = (costSz > MAX_COST) ? MAX_COST : (unsigned char)costSz;
411 // Opimized copy function, to avoid the SetCosts() function comparisons, and make it more clear that a node copy is happening.
412 void CopyCosts(const GenTree* const tree)
414 INDEBUG(gtCostsInitialized = tree->gtCostsInitialized;) // If the 'tree' costs aren't initialized, we'll hit an assert below.
415 _gtCostEx = tree->gtCostEx;
416 _gtCostSz = tree->gtCostSz;
419 // Same as CopyCosts, but avoids asserts if the costs we are copying have not been initialized.
420 // This is because the importer, for example, clones nodes, before these costs have been initialized.
421 // Note that we directly access the 'tree' costs, not going through the accessor functions (either
422 // directly or through the properties).
423 void CopyRawCosts(const GenTree* const tree)
425 INDEBUG(gtCostsInitialized = tree->gtCostsInitialized;)
426 _gtCostEx = tree->_gtCostEx;
427 _gtCostSz = tree->_gtCostSz;
432 unsigned char _gtCostEx; // estimate of expression execution cost
433 unsigned char _gtCostSz; // estimate of expression code size cost
436 // Register or register pair number of the node.
443 GT_REGTAG_NONE, // Nothing has been assigned to _gtRegNum/_gtRegPair
444 GT_REGTAG_REG, // _gtRegNum has been assigned
445 #if CPU_LONG_USES_REGPAIR
446 GT_REGTAG_REGPAIR // _gtRegPair has been assigned
449 genRegTag GetRegTag() const
451 #if CPU_LONG_USES_REGPAIR
452 assert(gtRegTag == GT_REGTAG_NONE || gtRegTag == GT_REGTAG_REG || gtRegTag == GT_REGTAG_REGPAIR);
454 assert(gtRegTag == GT_REGTAG_NONE || gtRegTag == GT_REGTAG_REG);
459 genRegTag gtRegTag; // What is in _gtRegNum/_gtRegPair?
466 // NOTE: After LSRA, one of these values may be valid even if GTF_REG_VAL is not set in gtFlags.
467 // They store the register assigned to the node. If a register is not assigned, _gtRegNum is set to REG_NA
468 // or _gtRegPair is set to REG_PAIR_NONE, depending on the node type.
469 regNumberSmall _gtRegNum; // which register the value is in
470 regPairNoSmall _gtRegPair; // which register pair the value is in
475 // The register number is stored in a small format (8 bits), but the getters return and the setters take
476 // a full-size (unsigned) format, to localize the casts here.
478 __declspec(property(get=GetRegNum,put=SetRegNum))
481 // for codegen purposes, is this node a subnode of its parent
482 bool isContained() const;
484 bool isContainedIndir() const;
486 bool isIndirAddrMode();
488 bool isIndir() const;
490 bool isContainedIntOrIImmed() const { return isContained() && IsCnsIntOrI(); }
492 bool isContainedFltOrDblImmed() const { return isContained() && (OperGet() == GT_CNS_DBL); }
494 bool isLclField() const { return OperGet() == GT_LCL_FLD || OperGet() == GT_STORE_LCL_FLD; }
496 bool isContainedLclField() const { return isContained() && isLclField(); }
498 // Indicates whether it is a memory op.
499 // Right now it includes Indir and LclField ops.
500 bool isMemoryOp() const { return isIndir() || isLclField(); }
502 bool isContainedMemoryOp() const { return isContained() && isMemoryOp(); }
504 regNumber GetRegNum() const
506 assert((gtRegTag == GT_REGTAG_REG) ||
507 (gtRegTag == GT_REGTAG_NONE)); // TODO-Cleanup: get rid of the NONE case, and fix everyplace that reads undefined values
508 regNumber reg = (regNumber) _gtRegNum;
509 assert((gtRegTag == GT_REGTAG_NONE) || // TODO-Cleanup: get rid of the NONE case, and fix everyplace that reads undefined values
515 void SetRegNum(regNumber reg)
517 assert(reg >= REG_FIRST &&
519 // Make sure the upper bits of _gtRegPair are clear
520 _gtRegPair = (regPairNoSmall) 0;
521 _gtRegNum = (regNumberSmall) reg;
522 INDEBUG(gtRegTag = GT_REGTAG_REG;)
523 assert(_gtRegNum == reg);
526 #if CPU_LONG_USES_REGPAIR
527 __declspec(property(get=GetRegPair,put=SetRegPair))
530 regPairNo GetRegPair() const
532 assert((gtRegTag == GT_REGTAG_REGPAIR) ||
533 (gtRegTag == GT_REGTAG_NONE)); // TODO-Cleanup: get rid of the NONE case, and fix everyplace that reads undefined values
534 regPairNo regPair = (regPairNo) _gtRegPair;
535 assert((gtRegTag == GT_REGTAG_NONE) || // TODO-Cleanup: get rid of the NONE case, and fix everyplace that reads undefined values
536 (regPair >= REG_PAIR_FIRST &&
537 regPair <= REG_PAIR_LAST) ||
538 (regPair == REG_PAIR_NONE)); // allow initializing to an undefined value
542 void SetRegPair(regPairNo regPair)
544 assert((regPair >= REG_PAIR_FIRST &&
545 regPair <= REG_PAIR_LAST) ||
546 (regPair == REG_PAIR_NONE)); // allow initializing to an undefined value
547 _gtRegPair = (regPairNoSmall) regPair;
548 INDEBUG(gtRegTag = GT_REGTAG_REGPAIR;)
549 assert(_gtRegPair == regPair);
553 // Copy the _gtRegNum/_gtRegPair/gtRegTag fields
554 void CopyReg(GenTreePtr from);
556 void gtClearReg(Compiler* compiler);
558 bool gtHasReg() const;
560 regMaskTP gtGetRegMask() const;
562 unsigned gtFlags; // see GTF_xxxx below
564 ValueNumPair gtVNPair;
566 regMaskSmall gtRsvdRegs; // set of fixed trashed registers
567 #ifdef LEGACY_BACKEND
568 regMaskSmall gtUsedRegs; // set of used (trashed) registers
569 #endif // LEGACY_BACKEND
571 #ifndef LEGACY_BACKEND
572 TreeNodeInfo gtLsraInfo;
573 #endif // !LEGACY_BACKEND
575 void SetVNsFromNode(GenTreePtr tree)
577 gtVNPair = tree->gtVNPair;
580 ValueNum GetVN(ValueNumKind vnk) const
582 if (vnk == VNK_Liberal)
584 return gtVNPair.GetLiberal();
588 assert(vnk == VNK_Conservative);
589 return gtVNPair.GetConservative();
592 void SetVN(ValueNumKind vnk, ValueNum vn)
594 if (vnk == VNK_Liberal)
596 return gtVNPair.SetLiberal(vn);
600 assert(vnk == VNK_Conservative);
601 return gtVNPair.SetConservative(vn);
604 void SetVNs(ValueNumPair vnp)
610 gtVNPair = ValueNumPair(); // Initializes both elements to "NoVN".
613 //---------------------------------------------------------------------
614 // The first set of flags can be used with a large set of nodes, and
615 // thus they must all have distinct values. That is, one can test any
616 // expression node for one of these flags.
617 //---------------------------------------------------------------------
619 #define GTF_ASG 0x00000001 // sub-expression contains an assignment
620 #define GTF_CALL 0x00000002 // sub-expression contains a func. call
621 #define GTF_EXCEPT 0x00000004 // sub-expression might throw an exception
622 #define GTF_GLOB_REF 0x00000008 // sub-expression uses global variable(s)
623 #define GTF_ORDER_SIDEEFF 0x00000010 // sub-expression has a re-ordering side effect
625 // If you set these flags, make sure that code:gtExtractSideEffList knows how to find the tree,
626 // otherwise the C# (run csc /o-)
627 // var v = side_eff_operation
628 // with no use of v will drop your tree on the floor.
629 #define GTF_PERSISTENT_SIDE_EFFECTS (GTF_ASG|GTF_CALL)
630 #define GTF_SIDE_EFFECT (GTF_PERSISTENT_SIDE_EFFECTS|GTF_EXCEPT)
631 #define GTF_GLOB_EFFECT (GTF_SIDE_EFFECT|GTF_GLOB_REF)
632 #define GTF_ALL_EFFECT (GTF_GLOB_EFFECT|GTF_ORDER_SIDEEFF)
634 // The extra flag GTF_DEAD is used to tell the consumer of these flags
635 // that we are calling in the context of performing a CSE, thus we
636 // should allow the run-once side effects of running a class constructor.
638 #define GTF_PERSISTENT_SIDE_EFFECTS_IN_CSE (GTF_ASG|GTF_CALL|GTF_DEAD)
640 // Can any side-effects be observed externally, say by a caller method?
641 // For assignments, only assignments to global memory can be observed
642 // externally, whereas simple assignments to local variables can not.
644 // Be careful when using this inside a "try" protected region as the
645 // order of assignments to local variables would need to be preserved
646 // wrt side effects if the variables are alive on entry to the
647 // "catch/finally" region. In such cases, even assignments to locals
648 // will have to be restricted.
649 #define GTF_GLOBALLY_VISIBLE_SIDE_EFFECTS(flags) \
650 (((flags) & (GTF_CALL|GTF_EXCEPT)) || \
651 (((flags) & (GTF_ASG|GTF_GLOB_REF)) == (GTF_ASG|GTF_GLOB_REF)))
653 #define GTF_REVERSE_OPS 0x00000020 // operand op2 should be evaluated before op1 (normally, op1 is evaluated first and op2 is evaluated second)
654 #define GTF_REG_VAL 0x00000040 // operand is sitting in a register (or part of a TYP_LONG operand is sitting in a register)
656 #define GTF_SPILLED 0x00000080 // the value has been spilled
657 #define GTF_SPILLED_OPER 0x00000100 // op1 has been spilled
659 #ifdef LEGACY_BACKEND
660 #define GTF_SPILLED_OP2 0x00000200 // op2 has been spilled
661 #endif // LEGACY_BACKEND
664 #ifndef LEGACY_BACKEND
665 #define GTF_MORPHED 0x00000200 // the node has been morphed (in the global morphing phase)
666 #else // LEGACY_BACKEND
667 // For LEGACY_BACKEND, 0x00000200 is in use, but we can use the same value as GTF_SPILLED since we
668 // don't call gtSetEvalOrder(), which clears GTF_MORPHED, after GTF_SPILLED has been set.
669 #define GTF_MORPHED 0x00000080 // the node has been morphed (in the global morphing phase)
670 #endif // LEGACY_BACKEND
673 #define GTF_REDINDEX_CHECK 0x00000100 // Used for redundant range checks. Disjoint from GTF_SPILLED_OPER
675 #define GTF_ZSF_SET 0x00000400 // the zero(ZF) and sign(SF) flags set to the operand
676 #if FEATURE_SET_FLAGS
677 #define GTF_SET_FLAGS 0x00000800 // Requires that codegen for this node set the flags
678 // Use gtSetFlags() to check this flags
680 #define GTF_IND_NONFAULTING 0x00000800 // An indir that cannot fault. GTF_SET_FLAGS is not used on indirs
683 #define GTF_DEAD 0x00001000 // this node won't be used any more
684 #endif // FEATURE_ANYCSE
686 #define GTF_MAKE_CSE 0x00002000 // Hoisted Expression: try hard to make this into CSE (see optPerformHoistExpr)
687 #define GTF_DONT_CSE 0x00004000 // don't bother CSE'ing this expr
688 #define GTF_COLON_COND 0x00008000 // this node is conditionally executed (part of ? :)
690 #if defined(DEBUG) && SMALL_TREE_NODES
691 #define GTF_NODE_LARGE 0x00010000
692 #define GTF_NODE_SMALL 0x00020000
694 // Property of the node itself, not the gtOper
695 #define GTF_NODE_MASK (GTF_COLON_COND | GTF_MORPHED | GTF_NODE_SMALL | GTF_NODE_LARGE )
697 #define GTF_NODE_MASK (GTF_COLON_COND)
700 #define GTF_BOOLEAN 0x00040000 // value is known to be 0/1
702 #define GTF_SMALL_OK 0x00080000 // actual small int sufficient
704 #define GTF_UNSIGNED 0x00100000 // with GT_CAST: the source operand is an unsigned type
705 // with operators: the specified node is an unsigned operator
707 #define GTF_LATE_ARG 0x00200000 // the specified node is evaluated to a temp in the arg list, and this temp is added to gtCallLateArgs.
709 #define GTF_SPILL 0x00400000 // needs to be spilled here
710 #define GTF_SPILL_HIGH 0x00040000 // shared with GTF_BOOLEAN
712 #define GTF_COMMON_MASK 0x007FFFFF // mask of all the flags above
714 #define GTF_REUSE_REG_VAL 0x00800000 // This is set by the register allocator on nodes whose value already exists in the
715 // register assigned to this node, so the code generator does not have to generate
716 // code to produce the value.
717 // It is currently used only on constant nodes.
718 // It CANNOT be set on var (GT_LCL*) nodes, or on indir (GT_IND or GT_STOREIND) nodes, since
719 // 1) it is not needed for lclVars and is highly unlikely to be useful for indir nodes, and
720 // 2) it conflicts with GTFD_VAR_CSE_REF for lclVars (though this is debug only, and
721 // GTF_IND_ARR_INDEX for indirs.
723 //---------------------------------------------------------------------
724 // The following flags can be used only with a small set of nodes, and
725 // thus their values need not be distinct (other than within the set
726 // that goes with a particular node/nodes, of course). That is, one can
727 // only test for one of these flags if the 'gtOper' value is tested as
728 // well to make sure it's the right operator for the particular flag.
729 //---------------------------------------------------------------------
731 // NB: GTF_VAR_* and GTF_REG_* share the same namespace of flags, because
732 // GT_LCL_VAR nodes may be changed to GT_REG_VAR nodes without resetting
733 // the flags. These are also used by GT_LCL_FLD.
734 #define GTF_VAR_DEF 0x80000000 // GT_LCL_VAR -- this is a definition
735 #define GTF_VAR_USEASG 0x40000000 // GT_LCL_VAR -- this is a use/def for a x<op>=y
736 #define GTF_VAR_USEDEF 0x20000000 // GT_LCL_VAR -- this is a use/def as in x=x+y (only the lhs x is tagged)
737 #define GTF_VAR_CAST 0x10000000 // GT_LCL_VAR -- has been explictly cast (variable node may not be type of local)
738 #define GTF_VAR_ITERATOR 0x08000000 // GT_LCL_VAR -- this is a iterator reference in the loop condition
739 #define GTF_VAR_CLONED 0x01000000 // GT_LCL_VAR -- this node has been cloned or is a clone
740 // Relevant for inlining optimizations (see fgInlinePrependStatements)
742 // TODO-Cleanup: Currently, GTF_REG_BIRTH is used only by stackfp
743 // We should consider using it more generally for VAR_BIRTH, instead of
744 // GTF_VAR_DEF && !GTF_VAR_USEASG
745 #define GTF_REG_BIRTH 0x04000000 // GT_REG_VAR -- enregistered variable born here
746 #define GTF_VAR_DEATH 0x02000000 // GT_LCL_VAR, GT_REG_VAR -- variable dies here (last use)
748 #define GTF_VAR_ARR_INDEX 0x00000020 // The variable is part of (the index portion of) an array index expression.
749 // Shares a value with GTF_REVERSE_OPS, which is meaningless for local var.
751 #define GTF_LIVENESS_MASK (GTF_VAR_DEF|GTF_VAR_USEASG|GTF_VAR_USEDEF|GTF_REG_BIRTH|GTF_VAR_DEATH)
753 #define GTF_CALL_UNMANAGED 0x80000000 // GT_CALL -- direct call to unmanaged code
754 #define GTF_CALL_INLINE_CANDIDATE 0x40000000 // GT_CALL -- this call has been marked as an inline candidate
756 #define GTF_CALL_VIRT_KIND_MASK 0x30000000
757 #define GTF_CALL_NONVIRT 0x00000000 // GT_CALL -- a non virtual call
758 #define GTF_CALL_VIRT_STUB 0x10000000 // GT_CALL -- a stub-dispatch virtual call
759 #define GTF_CALL_VIRT_VTABLE 0x20000000 // GT_CALL -- a vtable-based virtual call
761 #define GTF_CALL_NULLCHECK 0x08000000 // GT_CALL -- must check instance pointer for null
762 #define GTF_CALL_POP_ARGS 0x04000000 // GT_CALL -- caller pop arguments?
763 #define GTF_CALL_HOISTABLE 0x02000000 // GT_CALL -- call is hoistable
764 #define GTF_CALL_REG_SAVE 0x01000000 // GT_CALL -- This call preserves all integer regs
765 // For additional flags for GT_CALL node see GTF_CALL_M_
768 #define GTFD_VAR_CSE_REF 0x00800000 // GT_LCL_VAR -- This is a CSE LCL_VAR node
771 #define GTF_NOP_DEATH 0x40000000 // GT_NOP -- operand dies here
773 #define GTF_FLD_NULLCHECK 0x80000000 // GT_FIELD -- need to nullcheck the "this" pointer
774 #define GTF_FLD_VOLATILE 0x40000000 // GT_FIELD/GT_CLS_VAR -- same as GTF_IND_VOLATILE
776 #define GTF_INX_RNGCHK 0x80000000 // GT_INDEX -- the array reference should be range-checked.
777 #define GTF_INX_REFARR_LAYOUT 0x20000000 // GT_INDEX -- same as GTF_IND_REFARR_LAYOUT
778 #define GTF_INX_STRING_LAYOUT 0x40000000 // GT_INDEX -- this uses the special string array layout
780 #define GTF_IND_VOLATILE 0x40000000 // GT_IND -- the load or store must use volatile sematics (this is a nop on X86)
781 #define GTF_IND_REFARR_LAYOUT 0x20000000 // GT_IND -- the array holds object refs (only effects layout of Arrays)
782 #define GTF_IND_TGTANYWHERE 0x10000000 // GT_IND -- the target could be anywhere
783 #define GTF_IND_TLS_REF 0x08000000 // GT_IND -- the target is accessed via TLS
784 #define GTF_IND_ASG_LHS 0x04000000 // GT_IND -- this GT_IND node is (the effective val) of the LHS of an assignment; don't evaluate it independently.
785 #define GTF_IND_UNALIGNED 0x02000000 // GT_IND -- the load or store is unaligned (we assume worst case alignment of 1 byte)
786 #define GTF_IND_INVARIANT 0x01000000 // GT_IND -- the target is invariant (a prejit indirection)
787 #define GTF_IND_ARR_LEN 0x80000000 // GT_IND -- the indirection represents an array length (of the REF contribution to its argument).
788 #define GTF_IND_ARR_INDEX 0x00800000 // GT_IND -- the indirection represents an (SZ) array index (this shares the same value as GTFD_VAR_CSE_REF,
789 // but is disjoint because a GT_LCL_VAR is never an ind (GT_IND or GT_STOREIND)
791 #define GTF_IND_FLAGS (GTF_IND_VOLATILE|GTF_IND_REFARR_LAYOUT|GTF_IND_TGTANYWHERE|GTF_IND_NONFAULTING|\
792 GTF_IND_TLS_REF|GTF_IND_UNALIGNED|GTF_IND_INVARIANT|GTF_IND_ARR_INDEX)
794 #define GTF_CLS_VAR_ASG_LHS 0x04000000 // GT_CLS_VAR -- this GT_CLS_VAR node is (the effective val) of the LHS of an assignment; don't evaluate it independently.
796 #define GTF_ADDR_ONSTACK 0x80000000 // GT_ADDR -- this expression is guaranteed to be on the stack
799 #define GTF_ADDRMODE_NO_CSE 0x80000000 // GT_ADD/GT_MUL/GT_LSH -- Do not CSE this node only, forms complex addressing mode
801 #define GTF_MUL_64RSLT 0x40000000 // GT_MUL -- produce 64-bit result
803 #define GTF_MOD_INT_RESULT 0x80000000 // GT_MOD, -- the real tree represented by this
804 // GT_UMOD node evaluates to an int even though
805 // its type is long. The result is
806 // placed in the low member of the
809 #define GTF_RELOP_NAN_UN 0x80000000 // GT_<relop> -- Is branch taken if ops are NaN?
810 #define GTF_RELOP_JMP_USED 0x40000000 // GT_<relop> -- result of compare used for jump or ?:
811 #define GTF_RELOP_QMARK 0x20000000 // GT_<relop> -- the node is the condition for ?:
812 #define GTF_RELOP_SMALL 0x10000000 // GT_<relop> -- We should use a byte or short sized compare (op1->gtType is the small type)
813 #define GTF_RELOP_ZTT 0x08000000 // GT_<relop> -- Loop test cloned for converting while-loops into do-while with explicit "loop test" in the header block.
815 #define GTF_QMARK_CAST_INSTOF 0x80000000 // GT_QMARK -- Is this a top (not nested) level qmark created for castclass or instanceof?
817 #define GTF_BOX_VALUE 0x80000000 // GT_BOX -- "box" is on a value type
819 #define GTF_ICON_HDL_MASK 0xF0000000 // Bits used by handle types below
821 #define GTF_ICON_SCOPE_HDL 0x10000000 // GT_CNS_INT -- constant is a scope handle
822 #define GTF_ICON_CLASS_HDL 0x20000000 // GT_CNS_INT -- constant is a class handle
823 #define GTF_ICON_METHOD_HDL 0x30000000 // GT_CNS_INT -- constant is a method handle
824 #define GTF_ICON_FIELD_HDL 0x40000000 // GT_CNS_INT -- constant is a field handle
825 #define GTF_ICON_STATIC_HDL 0x50000000 // GT_CNS_INT -- constant is a handle to static data
826 #define GTF_ICON_STR_HDL 0x60000000 // GT_CNS_INT -- constant is a string handle
827 #define GTF_ICON_PSTR_HDL 0x70000000 // GT_CNS_INT -- constant is a ptr to a string handle
828 #define GTF_ICON_PTR_HDL 0x80000000 // GT_CNS_INT -- constant is a ldptr handle
829 #define GTF_ICON_VARG_HDL 0x90000000 // GT_CNS_INT -- constant is a var arg cookie handle
830 #define GTF_ICON_PINVKI_HDL 0xA0000000 // GT_CNS_INT -- constant is a pinvoke calli handle
831 #define GTF_ICON_TOKEN_HDL 0xB0000000 // GT_CNS_INT -- constant is a token handle
832 #define GTF_ICON_TLS_HDL 0xC0000000 // GT_CNS_INT -- constant is a TLS ref with offset
833 #define GTF_ICON_FTN_ADDR 0xD0000000 // GT_CNS_INT -- constant is a function address
834 #define GTF_ICON_CIDMID_HDL 0xE0000000 // GT_CNS_INT -- constant is a class or module ID handle
835 #define GTF_ICON_BBC_PTR 0xF0000000 // GT_CNS_INT -- constant is a basic block count pointer
837 #define GTF_ICON_FIELD_OFF 0x08000000 // GT_CNS_INT -- constant is a field offset
839 #define GTF_BLK_HASGCPTR 0x80000000 // GT_COPYBLK -- This struct copy will copy GC Pointers
840 #define GTF_BLK_VOLATILE 0x40000000 // GT_INITBLK/GT_COPYBLK -- is a volatile block operation
841 #define GTF_BLK_UNALIGNED 0x02000000 // GT_INITBLK/GT_COPYBLK -- is an unaligned block operation
843 #define GTF_OVERFLOW 0x10000000 // GT_ADD, GT_SUB, GT_MUL, - Need overflow check
844 // GT_ASG_ADD, GT_ASG_SUB,
846 // Use gtOverflow(Ex)() to check this flag
848 #define GTF_NO_OP_NO 0x80000000 // GT_NO_OP --Have the codegenerator generate a special nop
850 //----------------------------------------------------------------
852 #define GTF_STMT_CMPADD 0x80000000 // GT_STMT -- added by compiler
853 #define GTF_STMT_HAS_CSE 0x40000000 // GT_STMT -- CSE def or use was subsituted
854 #define GTF_STMT_TOP_LEVEL 0x20000000 // GT_STMT -- Top-level statement - true iff gtStmtList->gtPrev == nullptr
855 // True for all stmts when in FGOrderTree
856 #define GTF_STMT_SKIP_LOWER 0x10000000 // GT_STMT -- Skip lowering if we already lowered an embedded stmt.
858 //----------------------------------------------------------------
865 unsigned gtSeqNum; // liveness traversal order within the current statement
869 const unsigned short gtOperKindTable[];
872 unsigned OperKind(unsigned gtOper)
874 assert(gtOper < GT_COUNT);
876 return gtOperKindTable[gtOper];
879 unsigned OperKind() const
881 assert(gtOper < GT_COUNT);
883 return gtOperKindTable[gtOper];
886 static bool IsExOp(unsigned opKind)
888 return (opKind & GTK_EXOP) != 0;
890 // Returns the operKind with the GTK_EX_OP bit removed (the
891 // kind of operator, unary or binary, that is extended).
892 static unsigned StripExOp(unsigned opKind)
894 return opKind & ~GTK_EXOP;
898 int OperIsConst(genTreeOps gtOper)
900 return (OperKind(gtOper) & GTK_CONST ) != 0;
903 int OperIsConst() const
905 return (OperKind(gtOper) & GTK_CONST ) != 0;
909 int OperIsLeaf(genTreeOps gtOper)
911 return (OperKind(gtOper) & GTK_LEAF ) != 0;
914 int OperIsLeaf() const
916 return (OperKind(gtOper) & GTK_LEAF ) != 0;
920 int OperIsCompare(genTreeOps gtOper)
922 return (OperKind(gtOper) & GTK_RELOP ) != 0;
926 bool OperIsLocal(genTreeOps gtOper)
928 bool result = (OperKind(gtOper) & GTK_LOCAL) != 0;
930 (gtOper == GT_LCL_VAR ||
931 gtOper == GT_PHI_ARG ||
932 gtOper == GT_REG_VAR ||
933 gtOper == GT_LCL_FLD ||
934 gtOper == GT_STORE_LCL_VAR ||
935 gtOper == GT_STORE_LCL_FLD));
940 bool OperIsBlkOp(genTreeOps gtOper)
942 return (gtOper == GT_INITBLK ||
943 gtOper == GT_COPYBLK ||
944 gtOper == GT_COPYOBJ);
948 bool OperIsCopyBlkOp(genTreeOps gtOper)
950 return (gtOper == GT_COPYOBJ || gtOper == GT_COPYBLK);
955 bool OperIsLocalAddr(genTreeOps gtOper)
957 return (gtOper == GT_LCL_VAR_ADDR ||
958 gtOper == GT_LCL_FLD_ADDR);
962 bool OperIsScalarLocal(genTreeOps gtOper)
964 return (gtOper == GT_LCL_VAR ||
965 gtOper == GT_REG_VAR ||
966 gtOper == GT_STORE_LCL_VAR);
970 bool OperIsNonPhiLocal(genTreeOps gtOper)
972 return OperIsLocal(gtOper) && (gtOper != GT_PHI_ARG);
976 bool OperIsLocalRead(genTreeOps gtOper)
978 return (OperIsLocal(gtOper) && !OperIsLocalStore(gtOper));
982 bool OperIsLocalStore(genTreeOps gtOper)
984 return (gtOper == GT_STORE_LCL_VAR ||
985 gtOper == GT_STORE_LCL_FLD);
990 bool OperIsAddrMode(genTreeOps gtOper)
992 return (gtOper == GT_LEA);
995 bool OperIsBlkOp() const
997 return OperIsBlkOp(OperGet());
1000 bool OperIsCopyBlkOp() const
1002 return OperIsCopyBlkOp(OperGet());
1005 bool OperIsPutArgStk() const
1007 return gtOper == GT_PUTARG_STK;
1010 bool OperIsAddrMode() const
1012 return OperIsAddrMode(OperGet());
1015 bool OperIsLocal() const
1017 return OperIsLocal(OperGet());
1020 bool OperIsLocalAddr() const
1022 return OperIsLocalAddr(OperGet());
1025 bool OperIsScalarLocal() const
1027 return OperIsScalarLocal(OperGet());
1030 bool OperIsNonPhiLocal() const
1032 return OperIsNonPhiLocal(OperGet());
1035 bool OperIsLocalStore() const
1037 return OperIsLocalStore(OperGet());
1040 bool OperIsLocalRead() const
1042 return OperIsLocalRead(OperGet());
1047 return (OperKind(gtOper) & GTK_RELOP ) != 0;
1051 int OperIsLogical(genTreeOps gtOper)
1053 return (OperKind(gtOper) & GTK_LOGOP ) != 0;
1056 int OperIsLogical() const
1058 return (OperKind(gtOper) & GTK_LOGOP ) != 0;
1062 bool OperIsShift(genTreeOps gtOper)
1064 return (gtOper == GT_LSH) ||
1065 (gtOper == GT_RSH) ||
1069 bool OperIsShift() const
1071 return OperIsShift(OperGet());
1075 bool OperIsRotate(genTreeOps gtOper)
1077 return (gtOper == GT_ROL) ||
1081 bool OperIsRotate() const
1083 return OperIsRotate(OperGet());
1087 bool OperIsShiftOrRotate(genTreeOps gtOper)
1089 return OperIsShift(gtOper) ||
1090 OperIsRotate(gtOper);
1093 bool OperIsShiftOrRotate() const
1095 return OperIsShiftOrRotate(OperGet());
1098 int OperIsArithmetic() const
1100 genTreeOps op = OperGet();
1114 || OperIsShiftOrRotate(op);
1117 #if !defined(LEGACY_BACKEND) && !defined(_TARGET_64BIT_)
1119 bool OperIsHigh(genTreeOps gtOper)
1134 bool OperIsHigh() const
1136 return OperIsHigh(OperGet());
1138 #endif // !defined(LEGACY_BACKEND) && !defined(_TARGET_64BIT_)
1141 int OperIsUnary(genTreeOps gtOper)
1143 return (OperKind(gtOper) & GTK_UNOP ) != 0;
1146 int OperIsUnary() const
1148 return OperIsUnary(gtOper);
1152 int OperIsBinary(genTreeOps gtOper)
1154 return (OperKind(gtOper) & GTK_BINOP ) != 0;
1157 int OperIsBinary() const
1159 return OperIsBinary(gtOper);
1163 int OperIsSimple(genTreeOps gtOper)
1165 return (OperKind(gtOper) & GTK_SMPOP ) != 0;
1169 int OperIsSpecial(genTreeOps gtOper)
1171 return ((OperKind(gtOper) & GTK_KINDMASK) == GTK_SPECIAL);
1174 int OperIsSimple() const
1176 return OperIsSimple(gtOper);
1180 bool isCommutativeSIMDIntrinsic();
1182 bool isCommutativeSIMDIntrinsic()
1186 #endif // FEATURE_SIMD
1189 int OperIsCommutative(genTreeOps gtOper)
1191 return (OperKind(gtOper) & GTK_COMMUTE) != 0;
1194 int OperIsCommutative()
1196 return OperIsCommutative(gtOper) || (OperIsSIMD(gtOper) && isCommutativeSIMDIntrinsic());
1200 int OperIsAssignment(genTreeOps gtOper)
1202 return (OperKind(gtOper) & GTK_ASGOP) != 0;
1205 int OperIsAssignment() const
1207 return OperIsAssignment(gtOper);
1211 int OperIsIndir(genTreeOps gtOper)
1213 return gtOper == GT_IND || gtOper == GT_STOREIND || gtOper == GT_NULLCHECK;
1216 int OperIsIndir() const
1218 return OperIsIndir(gtOper);
1222 bool OperIsImplicitIndir(genTreeOps gtOper)
1243 bool OperIsImplicitIndir() const
1245 return OperIsImplicitIndir(gtOper);
1248 bool OperIsStore() const
1250 return OperIsStore(gtOper);
1254 bool OperIsStore(genTreeOps gtOper)
1256 return (gtOper == GT_STOREIND
1257 || gtOper == GT_STORE_LCL_VAR
1258 || gtOper == GT_STORE_LCL_FLD
1259 || gtOper == GT_STORE_CLS_VAR);
1263 int OperIsAtomicOp(genTreeOps gtOper)
1265 return (gtOper == GT_XADD
1266 || gtOper == GT_XCHG
1267 || gtOper == GT_LOCKADD
1268 || gtOper == GT_CMPXCHG);
1271 int OperIsAtomicOp()
1273 return OperIsAtomicOp(gtOper);
1276 // This is basically here for cleaner FEATURE_SIMD #ifdefs.
1278 bool OperIsSIMD(genTreeOps gtOper)
1281 return gtOper == GT_SIMD;
1282 #else // !FEATURE_SIMD
1284 #endif // !FEATURE_SIMD
1289 return OperIsSIMD(gtOper);
1292 // Requires that "op" is an op= operator. Returns
1293 // the corresponding "op".
1295 genTreeOps OpAsgToOper(genTreeOps op);
1298 bool NullOp1Legal() const
1300 assert(OperIsSimple(gtOper));
1303 case GT_PHI: case GT_LEA: case GT_RETFILT: case GT_NOP:
1306 return gtType == TYP_VOID;
1312 bool NullOp2Legal() const
1314 assert(OperIsSimple(gtOper));
1315 if (!OperIsBinary(gtOper))
1330 #endif // !FEATURE_SIMD
1338 inline bool RequiresNonNullOp2(genTreeOps oper);
1339 bool IsListForMultiRegArg();
1342 inline bool IsFPZero();
1343 inline bool IsIntegralConst(ssize_t constVal);
1345 inline bool IsBoxedValue();
1349 return gtOper == GT_LIST;
1352 inline GenTreePtr MoveNext();
1354 inline GenTreePtr Current();
1356 inline GenTreePtr *pCurrent();
1358 inline GenTreePtr gtGetOp1();
1360 inline GenTreePtr gtGetOp2();
1362 // Given a tree node, if this is a child of that node, return the pointer to the child node so that it
1363 // can be modified; otherwise, return null.
1364 GenTreePtr* gtGetChildPointer(GenTreePtr parent);
1366 // Get the parent of this node, and optionally capture the pointer to the child so that it can be modified.
1367 GenTreePtr gtGetParent(GenTreePtr** parentChildPtrPtr);
1369 inline GenTreePtr gtEffectiveVal(bool commaOnly = false);
1371 // Return the child of this node if it is a GT_RELOAD or GT_COPY; otherwise simply return the node itself
1372 inline GenTree* gtSkipReloadOrCopy();
1374 // Returns true if it is a call node returning its value in more than one register
1375 inline bool IsMultiRegCall() const;
1377 // Returns true if it is a GT_COPY or GT_RELOAD node
1378 inline bool IsCopyOrReload() const;
1380 // Returns true if it is a GT_COPY or GT_RELOAD of a multi-reg call node
1381 inline bool IsCopyOrReloadOfMultiRegCall() const;
1383 bool OperMayThrow();
1385 unsigned GetScaleIndexMul();
1386 unsigned GetScaleIndexShf();
1387 unsigned GetScaledIndex();
1389 // Returns true if "addr" is a GT_ADD node, at least one of whose arguments is an integer
1390 // (<= 32 bit) constant. If it returns true, it sets "*offset" to (one of the) constant value(s), and
1391 // "*addr" to the other argument.
1392 bool IsAddWithI32Const(GenTreePtr* addr, int* offset);
1394 // Insert 'node' after this node in execution order.
1395 void InsertAfterSelf(GenTree* node, GenTreeStmt* stmt = nullptr);
1399 #if SMALL_TREE_NODES
1401 unsigned char s_gtNodeSizes[];
1405 void InitNodeSize();
1407 size_t GetNodeSize() const;
1409 bool IsNodeProperlySized() const;
1411 void CopyFrom(const GenTree* src, Compiler* comp);
1414 genTreeOps ReverseRelop(genTreeOps relop);
1417 genTreeOps SwapRelop(genTreeOps relop);
1419 //---------------------------------------------------------------------
1422 bool Compare(GenTreePtr op1, GenTreePtr op2, bool swapOK = false);
1424 //---------------------------------------------------------------------
1426 //---------------------------------------------------------------------
1429 const char * NodeName(genTreeOps op);
1432 const char * OpName(genTreeOps op);
1434 //---------------------------------------------------------------------
1436 //---------------------------------------------------------------------
1438 bool IsNothingNode () const;
1439 void gtBashToNOP ();
1441 // Value number update action enumeration
1442 enum ValueNumberUpdate
1444 CLEAR_VN, // Clear value number
1445 PRESERVE_VN // Preserve value number
1448 void SetOper(genTreeOps oper, ValueNumberUpdate vnUpdate = CLEAR_VN); // set gtOper
1449 void SetOperResetFlags (genTreeOps oper); // set gtOper and reset flags
1451 void ChangeOperConst (genTreeOps oper); // ChangeOper(constOper)
1452 // set gtOper and only keep GTF_COMMON_MASK flags
1453 void ChangeOper(genTreeOps oper, ValueNumberUpdate vnUpdate = CLEAR_VN);
1454 void ChangeOperUnchecked (genTreeOps oper);
1456 bool IsLocal() const
1458 return OperIsLocal(OperGet());
1461 // Returns "true" iff 'this' is a GT_LCL_FLD or GT_STORE_LCL_FLD on which the type
1462 // is not the same size as the type of the GT_LCL_VAR.
1463 bool IsPartialLclFld(Compiler* comp);
1465 // Returns "true" iff "this" defines a local variable. Requires "comp" to be the
1466 // current compilation. If returns "true", sets "*pLclVarTree" to the
1467 // tree for the local that is defined, and, if "pIsEntire" is non-null, sets "*pIsEntire" to
1468 // true or false, depending on whether the assignment writes to the entirety of the local
1469 // variable, or just a portion of it.
1470 bool DefinesLocal(Compiler* comp, GenTreeLclVarCommon** pLclVarTree, bool* pIsEntire = nullptr);
1472 // Returns true if "this" represents the address of a local, or a field of a local. If returns true, sets
1473 // "*pLclVarTree" to the node indicating the local variable. If the address is that of a field of this node,
1474 // sets "*pFldSeq" to the field sequence representing that field, else null.
1475 bool IsLocalAddrExpr(Compiler* comp, GenTreeLclVarCommon** pLclVarTree, FieldSeqNode** pFldSeq);
1477 // Simpler variant of the above which just returns the local node if this is an expression that
1478 // yields an address into a local
1479 GenTreeLclVarCommon* IsLocalAddrExpr();
1481 // Determine whether this is an assignment tree of the form X = X (op) Y,
1482 // where Y is an arbitrary tree, and X is a lclVar.
1483 unsigned IsLclVarUpdateTree(GenTree** otherTree, genTreeOps *updateOper);
1485 // If returns "true", "this" may represent the address of a static or instance field
1486 // (or a field of such a field, in the case of an object field of type struct).
1487 // If returns "true", then either "*pObj" is set to the object reference,
1488 // or "*pStatic" is set to the baseAddr or offset to be added to the "*pFldSeq"
1489 // Only one of "*pObj" or "*pStatic" will be set, the other one will be null.
1490 // The boolean return value only indicates that "this" *may* be a field address
1491 // -- the field sequence must also be checked.
1492 // If it is a field address, the field sequence will be a sequence of length >= 1,
1493 // starting with an instance or static field, and optionally continuing with struct fields.
1494 bool IsFieldAddr(Compiler* comp, GenTreePtr* pObj, GenTreePtr* pStatic, FieldSeqNode** pFldSeq);
1496 // Requires "this" to be the address of an array (the child of a GT_IND labeled with GTF_IND_ARR_INDEX).
1497 // Sets "pArr" to the node representing the array (either an array object pointer, or perhaps a byref to the some element).
1498 // Sets "*pArrayType" to the class handle for the array type.
1499 // Sets "*inxVN" to the value number inferred for the array index.
1500 // Sets "*pFldSeq" to the sequence, if any, of struct fields used to index into the array element.
1501 void ParseArrayAddress(Compiler* comp,
1502 struct ArrayInfo* arrayInfo,
1505 FieldSeqNode** pFldSeq);
1507 // Helper method for the above.
1508 void ParseArrayAddressWork(Compiler* comp, ssize_t inputMul, GenTreePtr* pArr, ValueNum* pInxVN, ssize_t* pOffset, FieldSeqNode** pFldSeq);
1510 // Requires "this" to be a GT_IND. Requires the outermost caller to set "*pFldSeq" to nullptr.
1511 // Returns true if it is an array index expression, or access to a (sequence of) struct field(s)
1512 // within a struct array element. If it returns true, sets *arrayInfo to the array information, and sets *pFldSeq to the sequence
1513 // of struct field accesses.
1514 bool ParseArrayElemForm(Compiler* comp, ArrayInfo* arrayInfo, FieldSeqNode** pFldSeq);
1516 // Requires "this" to be the address of a (possible) array element (or struct field within that).
1517 // If it is, sets "*arrayInfo" to the array access info, "*pFldSeq" to the sequence of struct fields
1518 // accessed within the array element, and returns true. If not, returns "false".
1519 bool ParseArrayElemAddrForm(Compiler* comp, ArrayInfo* arrayInfo, FieldSeqNode** pFldSeq);
1521 // Requires "this" to be an int expression. If it is a sequence of one or more integer constants added together,
1522 // returns true and sets "*pFldSeq" to the sequence of fields with which those constants are annotated.
1523 bool ParseOffsetForm(Compiler* comp, FieldSeqNode** pFldSeq);
1525 // Labels "*this" as an array index expression: label all constants and variables that could contribute, as part of an affine expression, to the value of the
1527 void LabelIndex(Compiler* comp, bool isConst = true);
1529 // Assumes that "this" occurs in a context where it is being dereferenced as the LHS of an assignment-like
1530 // statement (assignment, initblk, or copyblk). The "width" should be the number of bytes copied by the
1531 // operation. Returns "true" if "this" is an address of (or within)
1532 // a local variable; sets "*pLclVarTree" to that local variable instance; and, if "pIsEntire" is non-null,
1533 // sets "*pIsEntire" to true if this assignment writes the full width of the local.
1534 bool DefinesLocalAddr(Compiler* comp, unsigned width, GenTreeLclVarCommon** pLclVarTree, bool* pIsEntire);
1536 bool IsRegVar () const
1538 return OperGet() == GT_REG_VAR?true:false;
1542 return (gtFlags & GTF_REG_VAL)?true:false;
1546 gtFlags |= GTF_REG_VAL;
1549 regNumber GetReg() const
1551 return InReg() ? gtRegNum : REG_NA;
1553 bool IsRegVarDeath () const
1555 assert(OperGet() == GT_REG_VAR);
1556 return (gtFlags & GTF_VAR_DEATH)?true:false;
1558 bool IsRegVarBirth () const
1560 assert(OperGet() == GT_REG_VAR);
1561 return (gtFlags & GTF_REG_BIRTH)?true:false;
1563 bool IsReverseOp() const
1565 return (gtFlags & GTF_REVERSE_OPS)?true:false;
1568 inline bool IsCnsIntOrI () const;
1570 inline bool IsIntegralConst () const;
1572 inline bool IsIntCnsFitsInI32 ();
1574 inline bool IsCnsFltOrDbl() const;
1576 inline bool IsCnsNonZeroFltOrDbl();
1578 bool IsIconHandle () const
1580 assert(gtOper == GT_CNS_INT);
1581 return (gtFlags & GTF_ICON_HDL_MASK) ? true : false;
1584 bool IsIconHandle (unsigned handleType) const
1586 assert(gtOper == GT_CNS_INT);
1587 assert((handleType & GTF_ICON_HDL_MASK) != 0); // check that handleType is one of the valid GTF_ICON_* values
1588 assert((handleType & ~GTF_ICON_HDL_MASK) == 0);
1589 return (gtFlags & GTF_ICON_HDL_MASK) == handleType;
1592 // Return just the part of the flags corresponding to the GTF_ICON_*_HDL flag. For example,
1593 // GTF_ICON_SCOPE_HDL. The tree node must be a const int, but it might not be a handle, in which
1594 // case we'll return zero.
1595 unsigned GetIconHandleFlag () const
1597 assert(gtOper == GT_CNS_INT);
1598 return (gtFlags & GTF_ICON_HDL_MASK);
1601 // Mark this node as no longer being a handle; clear its GTF_ICON_*_HDL bits.
1602 void ClearIconHandleMask()
1604 assert(gtOper == GT_CNS_INT);
1605 gtFlags &= ~GTF_ICON_HDL_MASK;
1608 // Return true if the two GT_CNS_INT trees have the same handle flag (GTF_ICON_*_HDL).
1609 static bool SameIconHandleFlag(GenTree* t1, GenTree* t2)
1611 return t1->GetIconHandleFlag() == t2->GetIconHandleFlag();
1614 bool IsArgPlaceHolderNode() const { return OperGet() == GT_ARGPLACE; }
1615 bool IsCall () const { return OperGet() == GT_CALL; }
1616 bool IsStatement () const { return OperGet() == GT_STMT; }
1617 inline bool IsHelperCall ();
1619 bool IsVarAddr () const;
1620 bool gtOverflow () const;
1621 bool gtOverflowEx () const;
1622 bool gtSetFlags () const;
1623 bool gtRequestSetFlags ();
1625 bool gtIsValid64RsltMul ();
1626 static int gtDispFlags (unsigned flags);
1630 inline var_types CastFromType();
1631 inline var_types& CastToType();
1633 // Returns "true" iff "*this" is an assignment (GT_ASG) tree that defines an SSA name (lcl = phi(...));
1636 // Returns "true" iff "*this" is a statement containing an assignment that defines an SSA name (lcl = phi(...));
1637 bool IsPhiDefnStmt();
1639 // Can't use an assignment operator, because we need the extra "comp" argument
1640 // (to provide the allocator necessary for the VarSet assignment).
1641 // TODO-Cleanup: Not really needed now, w/o liveset on tree nodes
1642 void CopyTo(class Compiler* comp, const GenTree& gt);
1644 // Like the above, excepts assumes copying from small node to small node.
1645 // (Following the code it replaces, it does *not* copy the GenTree fields,
1646 // which CopyTo does.)
1647 void CopyToSmall(const GenTree& gt);
1649 // Because of the fact that we hid the assignment operator of "BitSet" (in DEBUG),
1650 // we can't synthesize an assignment operator.
1651 // TODO-Cleanup: Could change this w/o liveset on tree nodes
1652 // (This is also necessary for the VTable trick.)
1655 // Returns the number of children of the current node.
1656 unsigned NumChildren();
1658 // Requires "childNum < NumChildren()". Returns the "n"th child of "this."
1659 GenTreePtr GetChild(unsigned childNum);
1661 // The maximum possible # of children of any node.
1662 static const int MAX_CHILDREN = 6;
1664 bool IsReuseRegVal() const
1666 // This can be extended to non-constant nodes, but not to local or indir nodes.
1667 if(OperIsConst() && ((gtFlags & GTF_REUSE_REG_VAL) != 0))
1673 void SetReuseRegVal()
1675 assert(OperIsConst());
1676 gtFlags |= GTF_REUSE_REG_VAL;
1678 void ResetReuseRegVal()
1680 assert(OperIsConst());
1681 gtFlags &= ~GTF_REUSE_REG_VAL;
1686 GenTree& operator=(const GenTree& gt) {
1687 assert(!"Don't copy");
1692 #if DEBUGGABLE_GENTREE
1693 // In DEBUG builds, add a dummy virtual method, to give the debugger run-time type information.
1694 virtual void DummyVirt() {}
1696 typedef void* VtablePtr;
1698 VtablePtr GetVtableForOper(genTreeOps oper);
1699 void SetVtableForOper(genTreeOps oper);
1701 static VtablePtr s_vtablesForOpers[GT_COUNT];
1702 static VtablePtr s_vtableForOp;
1703 #endif // DEBUGGABLE_GENTREE
1706 inline void* operator new(size_t sz, class Compiler*, genTreeOps oper);
1708 inline GenTree(genTreeOps oper, var_types type
1709 DEBUGARG(bool largeNode = false));
1713 /*****************************************************************************/
1714 // In the current design, we never instantiate GenTreeUnOp: it exists only to be
1715 // used as a base class. For unary operators, we instantiate GenTreeOp, with a NULL second
1716 // argument. We check that this is true dynamically. We could tighten this and get static
1717 // checking, but that would entail accessing the first child of a unary operator via something
1718 // like gtUnOp.gtOp1 instead of gtOp.gtOp1.
1719 struct GenTreeUnOp: public GenTree
1724 GenTreeUnOp(genTreeOps oper, var_types type
1725 DEBUGARG(bool largeNode = false)) :
1727 DEBUGARG(largeNode)),
1731 GenTreeUnOp(genTreeOps oper, var_types type, GenTreePtr op1
1732 DEBUGARG(bool largeNode = false)) :
1734 DEBUGARG(largeNode)),
1737 assert(op1 != nullptr || NullOp1Legal());
1738 if (op1 != nullptr) // Propagate effects flags from child.
1739 gtFlags |= op1->gtFlags & GTF_ALL_EFFECT;
1742 #if DEBUGGABLE_GENTREE
1743 GenTreeUnOp() : GenTree(), gtOp1(nullptr) {}
1747 struct GenTreeOp: public GenTreeUnOp
1751 GenTreeOp(genTreeOps oper, var_types type, GenTreePtr op1, GenTreePtr op2
1752 DEBUGARG(bool largeNode = false)) :
1753 GenTreeUnOp(oper, type, op1
1754 DEBUGARG(largeNode)),
1757 // comparisons are always integral types
1758 assert(!GenTree::OperIsCompare(oper) || varTypeIsIntegral(type));
1759 // Binary operators, with a few exceptions, require a non-nullptr
1761 assert(op2 != nullptr || NullOp2Legal());
1762 // Unary operators, on the other hand, require a null second argument.
1763 assert(!OperIsUnary(oper) || op2 == nullptr);
1764 // Propagate effects flags from child. (UnOp handled this for first child.)
1767 gtFlags |= op2->gtFlags & GTF_ALL_EFFECT;
1771 // A small set of types are unary operators with optional arguments. We use
1772 // this constructor to build those.
1773 GenTreeOp(genTreeOps oper, var_types type
1774 DEBUGARG(bool largeNode = false)) :
1775 GenTreeUnOp(oper, type
1776 DEBUGARG(largeNode)),
1779 // Unary operators with optional arguments:
1780 assert(oper == GT_NOP ||
1781 oper == GT_RETURN ||
1782 oper == GT_RETFILT ||
1786 #if DEBUGGABLE_GENTREE
1787 GenTreeOp() : GenTreeUnOp(), gtOp2(nullptr) {}
1792 struct GenTreeVal: public GenTree
1796 GenTreeVal(genTreeOps oper, var_types type, ssize_t val) :
1797 GenTree(oper, type),
1800 #if DEBUGGABLE_GENTREE
1801 GenTreeVal() : GenTree() {}
1805 struct GenTreeIntConCommon: public GenTree
1807 inline INT64 LngValue();
1808 inline void SetLngValue(INT64 val);
1809 inline ssize_t IconValue();
1810 inline void SetIconValue(ssize_t val);
1812 GenTreeIntConCommon(genTreeOps oper, var_types type
1813 DEBUGARG(bool largeNode = false)) :
1815 DEBUGARG(largeNode))
1820 return FitsInI32(IconValue());
1823 static bool FitsInI32(ssize_t val)
1825 #ifdef _TARGET_64BIT_
1826 return (int)val == val;
1832 bool ImmedValNeedsReloc(Compiler* comp);
1833 bool GenTreeIntConCommon::ImmedValCanBeFolded(Compiler* comp, genTreeOps op);
1835 #ifdef _TARGET_XARCH_
1836 bool FitsInAddrBase(Compiler* comp);
1837 bool AddrNeedsReloc(Compiler* comp);
1840 #if DEBUGGABLE_GENTREE
1841 GenTreeIntConCommon() : GenTree() {}
1845 // node representing a read from a physical register
1846 struct GenTreePhysReg: public GenTree
1848 // physregs need a field beyond gtRegNum because
1849 // gtRegNum indicates the destination (and can be changed)
1850 // whereas reg indicates the source
1852 GenTreePhysReg(regNumber r, var_types type=TYP_I_IMPL) :
1853 GenTree(GT_PHYSREG, type), gtSrcReg(r)
1856 #if DEBUGGABLE_GENTREE
1857 GenTreePhysReg() : GenTree() {}
1861 #ifndef LEGACY_BACKEND
1862 // gtJumpTable - Switch Jump Table
1864 // This node stores a DWORD constant that represents the
1865 // absolute address of a jump table for switches. The code
1866 // generator uses this table to code the destination for every case
1867 // in an array of addresses which starting position is stored in
1869 struct GenTreeJumpTable : public GenTreeIntConCommon
1871 ssize_t gtJumpTableAddr;
1873 GenTreeJumpTable(var_types type
1874 DEBUGARG(bool largeNode = false)) :
1875 GenTreeIntConCommon(GT_JMPTABLE, type
1876 DEBUGARG(largeNode))
1878 #if DEBUGGABLE_GENTREE
1879 GenTreeJumpTable() : GenTreeIntConCommon() {}
1882 #endif // !LEGACY_BACKEND
1884 /* gtIntCon -- integer constant (GT_CNS_INT) */
1885 struct GenTreeIntCon: public GenTreeIntConCommon
1888 * This is the GT_CNS_INT struct definition.
1889 * It's used to hold for both int constants and pointer handle constants.
1890 * For the 64-bit targets we will only use GT_CNS_INT as it used to represent all the possible sizes
1891 * For the 32-bit targets we use a GT_CNS_LNG to hold a 64-bit integer constant and GT_CNS_INT for all others.
1892 * In the future when we retarget the JIT for x86 we should consider eliminating GT_CNS_LNG
1894 ssize_t gtIconVal; // Must overlap and have the same offset with the gtIconVal field in GenTreeLngCon below.
1896 /* The InitializeArray intrinsic needs to go back to the newarray statement
1897 to find the class handle of the array so that we can get its size. However,
1898 in ngen mode, the handle in that statement does not correspond to the compile
1899 time handle (rather it lets you get a handle at run-time). In that case, we also
1900 need to store a compile time handle, which goes in this gtCompileTimeHandle field.
1902 ssize_t gtCompileTimeHandle;
1904 // TODO-Cleanup: It's not clear what characterizes the cases where the field
1905 // above is used. It may be that its uses and those of the "gtFieldSeq" field below
1906 // are mutually exclusive, and they could be put in a union. Or else we should separate
1907 // this type into three subtypes.
1909 // If this constant represents the offset of one or more fields, "gtFieldSeq" represents that
1910 // sequence of fields.
1911 FieldSeqNode* gtFieldSeq;
1913 #if defined (LATE_DISASM)
1915 /* If the constant was morphed from some other node,
1916 these fields enable us to get back to what the node
1917 originally represented. See use of gtNewIconHandleNode()
1922 /* Template struct - The significant field of the other
1923 * structs should overlap exactly with this struct
1928 unsigned gtIconHdl1;
1938 CORINFO_CLASS_HANDLE gtIconCls;
1944 GenTreeIntCon(var_types type, ssize_t value
1945 DEBUGARG(bool largeNode = false)) :
1946 GenTreeIntConCommon(GT_CNS_INT, type
1947 DEBUGARG(largeNode)),
1949 gtCompileTimeHandle(0),
1950 gtFieldSeq(FieldSeqStore::NotAField())
1953 GenTreeIntCon(var_types type, ssize_t value, FieldSeqNode* fields
1954 DEBUGARG(bool largeNode = false)) :
1955 GenTreeIntConCommon(GT_CNS_INT, type
1956 DEBUGARG(largeNode)),
1958 gtCompileTimeHandle(0),
1961 assert(fields != NULL);
1964 #ifdef _TARGET_64BIT_
1965 void TruncateOrSignExtend32()
1967 if (gtFlags & GTF_UNSIGNED)
1969 gtIconVal = UINT32(gtIconVal);
1973 gtIconVal = INT32(gtIconVal);
1976 #endif // _TARGET_64BIT_
1978 #if DEBUGGABLE_GENTREE
1979 GenTreeIntCon() : GenTreeIntConCommon() {}
1984 /* gtLngCon -- long constant (GT_CNS_LNG) */
1986 struct GenTreeLngCon: public GenTreeIntConCommon
1988 INT64 gtLconVal; // Must overlap and have the same offset with the gtIconVal field in GenTreeIntCon above.
1991 return (INT32)(gtLconVal & 0xffffffff);
1996 return (INT32)(gtLconVal >> 32);;
1999 GenTreeLngCon(INT64 val) :
2000 GenTreeIntConCommon(GT_CNS_NATIVELONG, TYP_LONG)
2001 { SetLngValue(val); }
2002 #if DEBUGGABLE_GENTREE
2003 GenTreeLngCon() : GenTreeIntConCommon() {}
2008 inline INT64 GenTreeIntConCommon::LngValue()
2010 #ifndef _TARGET_64BIT_
2011 assert(gtOper == GT_CNS_LNG);
2012 return AsLngCon()->gtLconVal;
2018 inline void GenTreeIntConCommon::SetLngValue(INT64 val)
2020 #ifndef _TARGET_64BIT_
2021 assert(gtOper == GT_CNS_LNG);
2022 AsLngCon()->gtLconVal = val;
2024 // Compile time asserts that these two fields overlap and have the same offsets: gtIconVal and gtLconVal
2025 C_ASSERT(offsetof(GenTreeLngCon, gtLconVal) == offsetof(GenTreeIntCon, gtIconVal));
2026 C_ASSERT(sizeof(AsLngCon()->gtLconVal) == sizeof(AsIntCon()->gtIconVal));
2028 SetIconValue(ssize_t(val));
2032 inline ssize_t GenTreeIntConCommon::IconValue()
2034 assert(gtOper == GT_CNS_INT); // We should never see a GT_CNS_LNG for a 64-bit target!
2035 return AsIntCon()->gtIconVal;
2038 inline void GenTreeIntConCommon::SetIconValue(ssize_t val)
2040 assert(gtOper == GT_CNS_INT); // We should never see a GT_CNS_LNG for a 64-bit target!
2041 AsIntCon()->gtIconVal = val;
2044 /* gtDblCon -- double constant (GT_CNS_DBL) */
2046 struct GenTreeDblCon: public GenTree
2050 bool isBitwiseEqual(GenTreeDblCon* other)
2052 unsigned __int64 bits = *(unsigned __int64 *)(>DconVal);
2053 unsigned __int64 otherBits = *(unsigned __int64 *)(&(other->gtDconVal));
2054 return (bits == otherBits);
2057 GenTreeDblCon(double val) :
2058 GenTree(GT_CNS_DBL, TYP_DOUBLE),
2061 #if DEBUGGABLE_GENTREE
2062 GenTreeDblCon() : GenTree() {}
2067 /* gtStrCon -- string constant (GT_CNS_STR) */
2069 struct GenTreeStrCon: public GenTree
2072 CORINFO_MODULE_HANDLE gtScpHnd;
2074 // Because this node can come from an inlined method we need to
2075 // have the scope handle, since it will become a helper call.
2076 GenTreeStrCon(unsigned sconCPX, CORINFO_MODULE_HANDLE mod
2077 DEBUGARG(bool largeNode = false)) :
2078 GenTree(GT_CNS_STR, TYP_REF
2079 DEBUGARG(largeNode)),
2080 gtSconCPX(sconCPX), gtScpHnd(mod)
2082 #if DEBUGGABLE_GENTREE
2083 GenTreeStrCon() : GenTree() {}
2087 // Common supertype of LCL_VAR, LCL_FLD, REG_VAR, PHI_ARG
2088 // This inherits from UnOp because lclvar stores are Unops
2089 struct GenTreeLclVarCommon: public GenTreeUnOp
2092 unsigned _gtLclNum; // The local number. An index into the Compiler::lvaTable array.
2093 unsigned _gtSsaNum; // The SSA number.
2096 GenTreeLclVarCommon(genTreeOps oper, var_types type, unsigned lclNum
2097 DEBUGARG(bool largeNode = false)) :
2098 GenTreeUnOp(oper, type
2099 DEBUGARG(largeNode))
2104 unsigned GetLclNum() const
2108 __declspec(property(get=GetLclNum)) unsigned gtLclNum;
2110 void SetLclNum(unsigned lclNum)
2113 _gtSsaNum = SsaConfig::RESERVED_SSA_NUM;
2116 unsigned GetSsaNum() const
2120 __declspec(property(get=GetSsaNum)) unsigned gtSsaNum;
2122 void SetSsaNum(unsigned ssaNum)
2129 return (gtSsaNum != SsaConfig::RESERVED_SSA_NUM);
2132 #if DEBUGGABLE_GENTREE
2133 GenTreeLclVarCommon() : GenTreeUnOp() {}
2137 // gtLclVar -- load/store/addr of local variable
2139 struct GenTreeLclVar: public GenTreeLclVarCommon
2141 IL_OFFSET gtLclILoffs; // instr offset of ref (only for debug info)
2143 GenTreeLclVar(var_types type, unsigned lclNum, IL_OFFSET ilOffs
2144 DEBUGARG(bool largeNode = false)) :
2145 GenTreeLclVarCommon(GT_LCL_VAR, type, lclNum
2146 DEBUGARG(largeNode)),
2150 GenTreeLclVar(genTreeOps oper, var_types type, unsigned lclNum, IL_OFFSET ilOffs
2151 DEBUGARG(bool largeNode = false)) :
2152 GenTreeLclVarCommon(oper, type, lclNum
2153 DEBUGARG(largeNode)),
2156 assert(OperIsLocal(oper) || OperIsLocalAddr(oper));
2159 #if DEBUGGABLE_GENTREE
2160 GenTreeLclVar() : GenTreeLclVarCommon() {}
2164 // gtLclFld -- load/store/addr of local variable field
2166 struct GenTreeLclFld: public GenTreeLclVarCommon
2168 unsigned gtLclOffs; // offset into the variable to access
2170 FieldSeqNode* gtFieldSeq; // This LclFld node represents some sequences of accesses.
2172 // old/FE style constructor where load/store/addr share same opcode
2173 GenTreeLclFld(var_types type, unsigned lclNum, unsigned lclOffs) :
2174 GenTreeLclVarCommon(GT_LCL_FLD, type, lclNum),
2175 gtLclOffs(lclOffs), gtFieldSeq(NULL)
2177 assert(sizeof(*this) <= s_gtNodeSizes[GT_LCL_FLD]);
2181 GenTreeLclFld(genTreeOps oper, var_types type, unsigned lclNum, unsigned lclOffs) :
2182 GenTreeLclVarCommon(oper, type, lclNum),
2183 gtLclOffs(lclOffs), gtFieldSeq(NULL)
2185 assert(sizeof(*this) <= s_gtNodeSizes[GT_LCL_FLD]);
2187 #if DEBUGGABLE_GENTREE
2188 GenTreeLclFld() : GenTreeLclVarCommon() {}
2192 struct GenTreeRegVar: public GenTreeLclVarCommon
2194 // TODO-Cleanup: Note that the base class GenTree already has a gtRegNum field.
2195 // It's not clear exactly why a GT_REG_VAR has a separate field. When
2196 // GT_REG_VAR is created, the two are identical. It appears that they may
2197 // or may not remain so. In particular, there is a comment in stackfp.cpp
2200 // There used to be an assertion: assert(src->gtRegNum == src->gtRegVar.gtRegNum, ...)
2201 // here, but there's actually no reason to assume that. AFAICT, for FP vars under stack FP,
2202 // src->gtRegVar.gtRegNum is the allocated stack pseudo-register, but src->gtRegNum is the
2203 // FP stack position into which that is loaded to represent a particular use of the variable.
2205 // It might be the case that only for stackfp do they ever differ.
2207 // The following might be possible: the GT_REG_VAR node has a last use prior to a complex
2208 // subtree being evaluated. It could then be spilled from the register. Later,
2209 // it could be unspilled into a different register, which would be recorded at
2210 // the unspill time in the GenTree::gtRegNum, whereas GenTreeRegVar::gtRegNum
2211 // is left alone. It's not clear why that is useful.
2213 // Assuming there is a particular use, like stack fp, that requires it, maybe we
2214 // can get rid of GT_REG_VAR and just leave it as GT_LCL_VAR, using the base class gtRegNum field.
2215 // If we need it for stackfp, we could add a GenTreeStackFPRegVar type, which carries both the
2216 // pieces of information, in a clearer and more specific way (in particular, with
2217 // a different member name).
2222 regNumberSmall _gtRegNum;
2226 GenTreeRegVar(var_types type, unsigned lclNum, regNumber regNum) :
2227 GenTreeLclVarCommon(GT_REG_VAR, type, lclNum
2233 // The register number is stored in a small format (8 bits), but the getters return and the setters take
2234 // a full-size (unsigned) format, to localize the casts here.
2236 __declspec(property(get=GetRegNum,put=SetRegNum))
2239 regNumber GetRegNum() const
2241 return (regNumber) _gtRegNum;
2244 void SetRegNum(regNumber reg)
2246 _gtRegNum = (regNumberSmall) reg;
2247 assert(_gtRegNum == reg);
2250 #if DEBUGGABLE_GENTREE
2251 GenTreeRegVar() : GenTreeLclVarCommon() {}
2255 /* gtCast -- conversion to a different type (GT_CAST) */
2257 struct GenTreeCast: public GenTreeOp
2259 GenTreePtr& CastOp() { return gtOp1; }
2260 var_types gtCastType;
2262 GenTreeCast(var_types type, GenTreePtr op, var_types castType
2263 DEBUGARG(bool largeNode = false)) :
2264 GenTreeOp(GT_CAST, type, op, nullptr
2265 DEBUGARG(largeNode)),
2266 gtCastType(castType)
2268 #if DEBUGGABLE_GENTREE
2269 GenTreeCast() : GenTreeOp() {}
2274 // GT_BOX nodes are place markers for boxed values. The "real" tree
2275 // for most purposes is in gtBoxOp.
2276 struct GenTreeBox: public GenTreeUnOp
2278 // An expanded helper call to implement the "box" if we don't get
2279 // rid of it any other way. Must be in same position as op1.
2281 GenTreePtr& BoxOp() { return gtOp1; }
2282 // This is the statement that contains the assignment tree when the node is an inlined GT_BOX on a value
2284 GenTreePtr gtAsgStmtWhenInlinedBoxValue;
2286 GenTreeBox(var_types type, GenTreePtr boxOp, GenTreePtr asgStmtWhenInlinedBoxValue) :
2287 GenTreeUnOp(GT_BOX, type, boxOp),
2288 gtAsgStmtWhenInlinedBoxValue(asgStmtWhenInlinedBoxValue)
2290 #if DEBUGGABLE_GENTREE
2291 GenTreeBox() : GenTreeUnOp() {}
2297 /* gtField -- data member ref (GT_FIELD) */
2299 struct GenTreeField: public GenTree
2301 GenTreePtr gtFldObj;
2302 CORINFO_FIELD_HANDLE gtFldHnd;
2304 bool gtFldMayOverlap;
2305 #ifdef FEATURE_READYTORUN_COMPILER
2306 CORINFO_CONST_LOOKUP gtFieldLookup;
2309 GenTreeField(var_types type) :
2310 GenTree(GT_FIELD, type
2313 gtFldMayOverlap = false;
2315 #if DEBUGGABLE_GENTREE
2316 GenTreeField() : GenTree() {}
2320 // Represents the Argument list of a call node, as a Lisp-style linked list.
2321 // (Originally I had hoped that this could have *only* the m_arg/m_rest fields, but it turns out
2322 // that enough of the GenTree mechanism is used that it makes sense just to make it a subtype. But
2323 // note that in many ways, this is *not* a "real" node of the tree, but rather a mechanism for
2324 // giving call nodes a flexible number of children. GenTreeArgListNodes never evaluate to registers,
2327 // Note that while this extends GenTreeOp, it is *not* an EXOP. We don't add any new fields, and one
2328 // is free to allocate a GenTreeOp of type GT_LIST. If you use this type, you get the convenient Current/Rest
2329 // method names for the arguments.
2330 struct GenTreeArgList: public GenTreeOp
2332 GenTreePtr& Current() { return gtOp1; }
2333 GenTreeArgList*& Rest() { assert(gtOp2 == NULL || gtOp2->OperGet() == GT_LIST); return *reinterpret_cast<GenTreeArgList**>(>Op2); }
2335 #if DEBUGGABLE_GENTREE
2336 GenTreeArgList() : GenTreeOp() {}
2339 GenTreeArgList(GenTreePtr arg) :
2340 GenTreeArgList(arg, nullptr) {}
2342 GenTreeArgList(GenTreePtr arg, GenTreeArgList* rest) :
2343 GenTreeOp(GT_LIST, TYP_VOID, arg, rest)
2345 // With structs passed in multiple args we could have an arg
2346 // GT_LIST containing a list of LCL_FLDs, see IsListForMultiRegArg()
2348 assert((arg != nullptr) && ((!arg->IsList()) || (arg->IsListForMultiRegArg())));
2349 gtFlags |= arg->gtFlags & GTF_ALL_EFFECT;
2352 gtFlags |= rest->gtFlags & GTF_ALL_EFFECT;
2357 // There was quite a bit of confusion in the code base about which of gtOp1 and gtOp2 was the
2358 // 'then' and 'else' clause of a colon node. Adding these accessors, while not enforcing anything,
2359 // at least *allows* the programmer to be obviously correct.
2360 // However, these conventions seem backward.
2361 // TODO-Cleanup: If we could get these accessors used everywhere, then we could switch them.
2362 struct GenTreeColon: public GenTreeOp
2364 GenTreePtr& ThenNode() { return gtOp2; }
2365 GenTreePtr& ElseNode() { return gtOp1; }
2367 #if DEBUGGABLE_GENTREE
2368 GenTreeColon() : GenTreeOp() {}
2371 GenTreeColon(var_types typ, GenTreePtr thenNode, GenTreePtr elseNode) :
2372 GenTreeOp(GT_COLON, typ, elseNode, thenNode)
2376 // gtCall -- method call (GT_CALL)
2377 typedef class fgArgInfo * fgArgInfoPtr;
2378 enum class InlineObservation;
2380 // Return type descriptor of a GT_CALL node.
2381 // x64 Unix, Arm64, Arm32 and x86 allow a value to be returned in multiple
2382 // registers. For such calls this struct provides the following info
2383 // on their return type
2384 // - type of value returned in each return register
2385 // - ABI return register numbers in which the value is returned
2386 // - count of return registers in which the value is returned
2388 // TODO-ARM: Update this to meet the needs of Arm64 and Arm32
2390 // TODO-AllArch: Right now it is used for describing multi-reg returned types.
2391 // Eventually we would want to use it for describing even single-reg
2392 // returned types (e.g. structs returned in single register x64/arm).
2393 // This would allow us not to lie or normalize single struct return
2394 // values in importer/morph.
2395 struct ReturnTypeDesc
2398 var_types m_regType0;
2399 var_types m_regType1;
2411 // Initialize type descriptor given its type handle
2412 void Initialize(Compiler* comp, CORINFO_CLASS_HANDLE retClsHnd);
2414 // Reset type descriptor to defaults
2417 m_regType0 = TYP_UNKNOWN;
2418 m_regType1 = TYP_UNKNOWN;
2425 //--------------------------------------------------------------------------------------------
2426 // GetReturnRegCount: Get the count of return registers in which the return value is returned.
2432 // Count of return registers.
2433 // Returns 0 if the return type is not returned in registers.
2434 unsigned GetReturnRegCount() const
2439 if (m_regType0 != TYP_UNKNOWN)
2443 if (m_regType1 != TYP_UNKNOWN)
2450 // If regType0 is TYP_UNKNOWN then regType1 must also be TYP_UNKNOWN.
2451 assert(m_regType1 == TYP_UNKNOWN);
2456 //-----------------------------------------------------------------------
2457 // IsMultiRegRetType: check whether the type is returned in multiple
2458 // return registers.
2464 // Returns true if the type is returned in multiple return registers.
2466 bool IsMultiRegRetType() const
2468 return GetReturnRegCount() > 1;
2471 //--------------------------------------------------------------------------
2472 // GetReturnRegType: Get var_type of the return register specified by index.
2475 // index - Index of the return register.
2476 // First return register will have an index 0 and so on.
2479 // var_type of the return register specified by its index.
2480 // Return TYP_UNKNOWN if index > number of return registers.
2481 var_types GetReturnRegType(unsigned index)
2483 assert(index < GetReturnRegCount());
2489 else if (index == 1)
2497 // Get ith ABI return register
2498 regNumber GetABIReturnReg(unsigned idx);
2500 // Get reg mask of ABI return registers
2501 regMaskTP GetABIReturnRegs();
2504 struct GenTreeCall final : public GenTree
2506 GenTreePtr gtCallObjp; // The instance argument ('this' pointer)
2507 GenTreeArgList* gtCallArgs; // The list of arguments in original evaluation order
2508 GenTreeArgList* gtCallLateArgs; // On x86: The register arguments in an optimal order
2509 // On ARM/x64: - also includes any outgoing arg space arguments
2510 // - that were evaluated into a temp LclVar
2511 fgArgInfoPtr fgArgInfo;
2513 #if !FEATURE_FIXED_OUT_ARGS
2514 int regArgListCount;
2518 // TODO-Throughput: Revisit this (this used to be only defined if
2519 // FEATURE_FIXED_OUT_ARGS was enabled, so this makes GenTreeCall 4 bytes bigger on x86).
2520 CORINFO_SIG_INFO* callSig; // Used by tail calls and to register callsites with the EE
2522 #ifdef LEGACY_BACKEND
2523 regMaskTP gtCallRegUsedMask; // mask of registers used to pass parameters
2524 #endif // LEGACY_BACKEND
2526 // State required to support multi-reg returning call nodes.
2527 // For now it is enabled only for x64 unix.
2529 // TODO-AllArch: enable for all call nodes to unify single-reg and multi-reg returns.
2530 #if FEATURE_MULTIREG_RET
2531 ReturnTypeDesc gtReturnTypeDesc;
2533 // gtRegNum would always be the first return reg.
2534 // The following array holds the other reg numbers of multi-reg return.
2535 regNumber gtOtherRegs[MAX_RET_REG_COUNT - 1];
2537 // GTF_SPILL or GTF_SPILLED flag on a multi-reg call node indicates that one or
2538 // more of its result regs are in that state. The spill flag of each of the
2539 // return register is stored in the below array.
2540 unsigned gtSpillFlags[MAX_RET_REG_COUNT];
2543 //-----------------------------------------------------------------------
2544 // GetReturnTypeDesc: get the type descriptor of return value of the call
2550 // Type descriptor of the value returned by call
2553 // Right now implemented only for x64 unix and yet to be
2554 // implemented for other multi-reg target arch (Arm64/Arm32/x86).
2556 // TODO-AllArch: enable for all call nodes to unify single-reg and multi-reg returns.
2557 ReturnTypeDesc* GetReturnTypeDesc()
2559 #if FEATURE_MULTIREG_RET
2560 return >ReturnTypeDesc;
2566 //---------------------------------------------------------------------------
2567 // GetRegNumByIdx: get ith return register allocated to this call node.
2570 // idx - index of the return register
2573 // Return regNumber of ith return register of call node.
2574 // Returns REG_NA if there is no valid return register for the given index.
2576 regNumber GetRegNumByIdx(unsigned idx) const
2578 assert(idx < MAX_RET_REG_COUNT);
2585 #if FEATURE_MULTIREG_RET
2586 return gtOtherRegs[idx-1];
2592 //----------------------------------------------------------------------
2593 // SetRegNumByIdx: set ith return register of this call node
2597 // idx - index of the return register
2602 void SetRegNumByIdx(regNumber reg, unsigned idx)
2604 assert(idx < MAX_RET_REG_COUNT);
2610 #if FEATURE_MULTIREG_RET
2613 gtOtherRegs[idx - 1] = reg;
2614 assert(gtOtherRegs[idx - 1] == reg);
2621 //----------------------------------------------------------------------------
2622 // ClearOtherRegs: clear multi-reg state to indicate no regs are allocated
2630 void ClearOtherRegs()
2632 #if FEATURE_MULTIREG_RET
2633 for (unsigned i = 0; i < MAX_RET_REG_COUNT - 1; ++i)
2635 gtOtherRegs[i] = REG_NA;
2640 //----------------------------------------------------------------------------
2641 // CopyOtherRegs: copy multi-reg state from the given call node to this node
2644 // fromCall - GenTreeCall node from which to copy multi-reg state
2649 void CopyOtherRegs(GenTreeCall* fromCall)
2651 #if FEATURE_MULTIREG_RET
2652 for (unsigned i = 0; i < MAX_RET_REG_COUNT - 1; ++i)
2654 this->gtOtherRegs[i] = fromCall->gtOtherRegs[i];
2659 // Get reg mask of all the valid registers of gtOtherRegs array
2660 regMaskTP GetOtherRegMask() const;
2662 //----------------------------------------------------------------------
2663 // GetRegSpillFlagByIdx: get spill flag associated with the return register
2664 // specified by its index.
2667 // idx - Position or index of the return register
2670 // Returns GTF_* flags associated with.
2671 unsigned GetRegSpillFlagByIdx(unsigned idx) const
2673 assert(idx < MAX_RET_REG_COUNT);
2675 #if FEATURE_MULTIREG_RET
2676 return gtSpillFlags[idx];
2678 assert(!"unreached");
2683 //----------------------------------------------------------------------
2684 // SetRegSpillFlagByIdx: set spill flags for the return register
2685 // specified by its index.
2688 // flags - GTF_* flags
2689 // idx - Position or index of the return register
2693 void SetRegSpillFlagByIdx(unsigned flags, unsigned idx)
2695 assert(idx < MAX_RET_REG_COUNT);
2697 #if FEATURE_MULTIREG_RET
2698 gtSpillFlags[idx] = flags;
2704 //-------------------------------------------------------------------
2705 // clearOtherRegFlags: clear GTF_* flags associated with gtOtherRegs
2712 void ClearOtherRegFlags()
2714 #if FEATURE_MULTIREG_RET
2715 for (unsigned i = 0; i < MAX_RET_REG_COUNT; ++i)
2717 gtSpillFlags[i] = 0;
2722 //-------------------------------------------------------------------------
2723 // CopyOtherRegFlags: copy GTF_* flags associated with gtOtherRegs from
2724 // the given call node.
2727 // fromCall - GenTreeCall node from which to copy
2732 void CopyOtherRegFlags(GenTreeCall* fromCall)
2734 #if FEATURE_MULTIREG_RET
2735 for (unsigned i = 0; i < MAX_RET_REG_COUNT; ++i)
2737 this->gtSpillFlags[i] = fromCall->gtSpillFlags[i];
2742 #define GTF_CALL_M_EXPLICIT_TAILCALL 0x0001 // GT_CALL -- the call is "tail" prefixed and importer has performed tail call checks
2743 #define GTF_CALL_M_TAILCALL 0x0002 // GT_CALL -- the call is a tailcall
2744 #define GTF_CALL_M_VARARGS 0x0004 // GT_CALL -- the call uses varargs ABI
2745 #define GTF_CALL_M_RETBUFFARG 0x0008 // GT_CALL -- first parameter is the return buffer argument
2746 #define GTF_CALL_M_DELEGATE_INV 0x0010 // GT_CALL -- call to Delegate.Invoke
2747 #define GTF_CALL_M_NOGCCHECK 0x0020 // GT_CALL -- not a call for computing full interruptability
2748 #define GTF_CALL_M_SPECIAL_INTRINSIC 0x0040 // GT_CALL -- function that could be optimized as an intrinsic
2749 // in special cases. Used to optimize fast way out in morphing
2750 #define GTF_CALL_M_UNMGD_THISCALL 0x0080 // "this" pointer (first argument) should be enregistered (only for GTF_CALL_UNMANAGED)
2751 #define GTF_CALL_M_VIRTSTUB_REL_INDIRECT 0x0080 // the virtstub is indirected through a relative address (only for GTF_CALL_VIRT_STUB)
2752 #define GTF_CALL_M_NONVIRT_SAME_THIS 0x0080 // callee "this" pointer is equal to caller this pointer (only for GTF_CALL_NONVIRT)
2753 #define GTF_CALL_M_FRAME_VAR_DEATH 0x0100 // GT_CALL -- the compLvFrameListRoot variable dies here (last use)
2755 #ifndef LEGACY_BACKEND
2756 #define GTF_CALL_M_TAILCALL_VIA_HELPER 0x0200 // GT_CALL -- call is a tail call dispatched via tail call JIT helper.
2757 #endif // !LEGACY_BACKEND
2759 #if FEATURE_TAILCALL_OPT
2760 #define GTF_CALL_M_IMPLICIT_TAILCALL 0x0400 // GT_CALL -- call is an opportunistic tail call and importer has performed tail call checks
2761 #define GTF_CALL_M_TAILCALL_TO_LOOP 0x0800 // GT_CALL -- call is a fast recursive tail call that can be converted into a loop
2764 #define GTF_CALL_M_PINVOKE 0x1000 // GT_CALL -- call is a pinvoke. This mirrors VM flag CORINFO_FLG_PINVOKE.
2765 // A call marked as Pinvoke is not necessarily a GT_CALL_UNMANAGED. For e.g.
2766 // an IL Stub dynamically generated for a PInvoke declaration is flagged as
2767 // a Pinvoke but not as an unmanaged call. See impCheckForPInvokeCall() to
2768 // know when these flags are set.
2770 #define GTF_CALL_M_R2R_REL_INDIRECT 0x2000 // GT_CALL -- ready to run call is indirected through a relative address
2772 bool IsUnmanaged() { return (gtFlags & GTF_CALL_UNMANAGED) != 0; }
2773 bool NeedsNullCheck() { return (gtFlags & GTF_CALL_NULLCHECK) != 0; }
2774 bool CallerPop() { return (gtFlags & GTF_CALL_POP_ARGS) != 0; }
2775 bool IsVirtual() { return (gtFlags & GTF_CALL_VIRT_KIND_MASK) != GTF_CALL_NONVIRT; }
2776 bool IsVirtualStub() { return (gtFlags & GTF_CALL_VIRT_KIND_MASK) == GTF_CALL_VIRT_STUB; }
2777 bool IsVirtualVtable() { return (gtFlags & GTF_CALL_VIRT_KIND_MASK) == GTF_CALL_VIRT_VTABLE; }
2778 bool IsInlineCandidate() { return (gtFlags & GTF_CALL_INLINE_CANDIDATE) != 0; }
2780 #ifndef LEGACY_BACKEND
2781 // Whether the method has non-standard args (i.e. passed in R10 or R11)
2782 // See fgMorphArgs() to know the call types for which non-standard args are inserted.
2783 bool HasNonStandardArgs() { return IsUnmanaged() || (gtCallType == CT_INDIRECT && (IsVirtualStub() || gtCallCookie)); }
2785 // Get the count of non-standard arg count
2786 int GetNonStandardArgCount()
2790 // R11 = PInvoke cookie param
2793 else if (gtCallType == CT_INDIRECT)
2795 if (IsVirtualStub())
2797 // R11 = Virtual stub param
2800 else if (gtCallCookie != nullptr)
2802 // R10 = PInvoke target param
2803 // R11 = PInvoke cookie param
2810 #endif // !LEGACY_BACKEND
2812 // Returns true if the call has retBuf argument
2813 bool HasRetBufArg() const { return (gtCallMoreFlags & GTF_CALL_M_RETBUFFARG) != 0; }
2815 //-----------------------------------------------------------------------------------------
2816 // HasMultiRegRetVal: whether the call node returns its value in multiple return registers.
2822 // True if the call is returning a multi-reg return value. False otherwise.
2825 // This is implemented only for x64 Unix and yet to be implemented for
2826 // other multi-reg return target arch (arm64/arm32/x86).
2828 // TODO-ARM: Implement this routine for Arm64 and Arm32
2829 bool HasMultiRegRetVal() const
2831 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
2832 return varTypeIsStruct(gtType) && !HasRetBufArg();
2833 #elif defined(_TARGET_X86_) && !defined(LEGACY_BACKEND)
2834 // LEGACY_BACKEND does not use multi reg returns for calls with long return types
2835 return varTypeIsLong(gtType);
2841 // Returns true if VM has flagged this method as CORINFO_FLG_PINVOKE.
2842 bool IsPInvoke() { return (gtCallMoreFlags & GTF_CALL_M_PINVOKE) != 0; }
2844 // Note that the distinction of whether tail prefixed or an implicit tail call
2845 // is maintained on a call node till fgMorphCall() after which it will be
2846 // either a tail call (i.e. IsTailCall() is true) or a non-tail call.
2847 bool IsTailPrefixedCall() { return (gtCallMoreFlags & GTF_CALL_M_EXPLICIT_TAILCALL) != 0; }
2849 // This method returning "true" implies that tail call flowgraph morhphing has
2850 // performed final checks and committed to making a tail call.
2851 bool IsTailCall() { return (gtCallMoreFlags & GTF_CALL_M_TAILCALL) != 0; }
2853 // This method returning "true" implies that importer has performed tail call checks
2854 // and providing a hint that this can be converted to a tail call.
2855 bool CanTailCall() { return IsTailPrefixedCall() || IsImplicitTailCall(); }
2857 #ifndef LEGACY_BACKEND
2858 bool IsTailCallViaHelper() { return IsTailCall() && (gtCallMoreFlags & GTF_CALL_M_TAILCALL_VIA_HELPER); }
2859 #else // LEGACY_BACKEND
2860 bool IsTailCallViaHelper() { return true; }
2861 #endif // LEGACY_BACKEND
2863 #if FEATURE_FASTTAILCALL
2864 bool IsFastTailCall() { return IsTailCall() && !(gtCallMoreFlags & GTF_CALL_M_TAILCALL_VIA_HELPER); }
2865 #else // !FEATURE_FASTTAILCALL
2866 bool IsFastTailCall() { return false; }
2867 #endif // !FEATURE_FASTTAILCALL
2869 #if FEATURE_TAILCALL_OPT
2870 // Returns true if this is marked for opportunistic tail calling.
2871 // That is, can be tail called though not explicitly prefixed with "tail" prefix.
2872 bool IsImplicitTailCall() { return (gtCallMoreFlags & GTF_CALL_M_IMPLICIT_TAILCALL) != 0; }
2873 bool IsTailCallConvertibleToLoop() { return (gtCallMoreFlags & GTF_CALL_M_TAILCALL_TO_LOOP) != 0; }
2874 #else // !FEATURE_TAILCALL_OPT
2875 bool IsImplicitTailCall() { return false; }
2876 bool IsTailCallConvertibleToLoop() { return false; }
2877 #endif // !FEATURE_TAILCALL_OPT
2879 bool IsSameThis() { return (gtCallMoreFlags & GTF_CALL_M_NONVIRT_SAME_THIS) != 0; }
2880 bool IsDelegateInvoke(){ return (gtCallMoreFlags & GTF_CALL_M_DELEGATE_INV) != 0; }
2881 bool IsVirtualStubRelativeIndir() { return (gtCallMoreFlags & GTF_CALL_M_VIRTSTUB_REL_INDIRECT) != 0; }
2882 #ifdef FEATURE_READYTORUN_COMPILER
2883 bool IsR2RRelativeIndir() { return (gtCallMoreFlags & GTF_CALL_M_R2R_REL_INDIRECT) != 0; }
2884 void setEntryPoint(CORINFO_CONST_LOOKUP entryPoint) {
2885 gtEntryPoint = entryPoint;
2886 if (gtEntryPoint.accessType == IAT_PVALUE)
2888 gtCallMoreFlags |= GTF_CALL_M_R2R_REL_INDIRECT;
2891 #endif // FEATURE_READYTORUN_COMPILER
2892 bool IsVarargs() { return (gtCallMoreFlags & GTF_CALL_M_VARARGS) != 0; }
2894 unsigned short gtCallMoreFlags; // in addition to gtFlags
2896 unsigned char gtCallType :3; // value from the gtCallTypes enumeration
2897 unsigned char gtReturnType :5; // exact return type
2899 CORINFO_CLASS_HANDLE gtRetClsHnd; // The return type handle of the call if it is a struct; always available
2903 // only used for CALLI unmanaged calls (CT_INDIRECT)
2904 GenTreePtr gtCallCookie;
2905 // gtInlineCandidateInfo is only used when inlining methods
2906 InlineCandidateInfo* gtInlineCandidateInfo;
2907 void* gtStubCallStubAddr; // GTF_CALL_VIRT_STUB - these are never inlined
2908 CORINFO_GENERIC_HANDLE compileTimeHelperArgumentHandle; // Used to track type handle argument of dynamic helpers
2909 void* gtDirectCallAddress; // Used to pass direct call address between lower and codegen
2912 // expression evaluated after args are placed which determines the control target
2913 GenTree * gtControlExpr;
2917 CORINFO_METHOD_HANDLE gtCallMethHnd; // CT_USER_FUNC
2918 GenTreePtr gtCallAddr; // CT_INDIRECT
2921 #ifdef FEATURE_READYTORUN_COMPILER
2922 // Call target lookup info for method call from a Ready To Run module
2923 CORINFO_CONST_LOOKUP gtEntryPoint;
2926 #if defined(DEBUG) || defined(INLINE_DATA)
2927 // For non-inline candidates, track the first observation
2928 // that blocks candidacy.
2929 InlineObservation gtInlineObservation;
2931 // IL offset of the call wrt its parent method.
2932 IL_OFFSET gtRawILOffset;
2933 #endif // defined(DEBUG) || defined(INLINE_DATA)
2935 GenTreeCall(var_types type) :
2936 GenTree(GT_CALL, type)
2939 #if DEBUGGABLE_GENTREE
2940 GenTreeCall() : GenTree()
2946 struct GenTreeCmpXchg: public GenTree
2948 GenTreePtr gtOpLocation;
2949 GenTreePtr gtOpValue;
2950 GenTreePtr gtOpComparand;
2952 GenTreeCmpXchg(var_types type, GenTreePtr loc, GenTreePtr val, GenTreePtr comparand) :
2953 GenTree(GT_CMPXCHG, type),
2954 gtOpLocation(loc), gtOpValue(val), gtOpComparand(comparand)
2956 // There's no reason to do a compare-exchange on a local location, so we'll assume that all of these
2957 // have global effects.
2958 gtFlags |= GTF_GLOB_EFFECT;
2960 #if DEBUGGABLE_GENTREE
2961 GenTreeCmpXchg() : GenTree() {}
2967 struct GenTreeFptrVal: public GenTree
2969 CORINFO_METHOD_HANDLE gtFptrMethod;
2971 #ifdef FEATURE_READYTORUN_COMPILER
2972 CORINFO_CONST_LOOKUP gtEntryPoint;
2973 CORINFO_RESOLVED_TOKEN* gtLdftnResolvedToken;
2976 GenTreeFptrVal(var_types type, CORINFO_METHOD_HANDLE meth) :
2977 GenTree(GT_FTN_ADDR, type),
2980 #if DEBUGGABLE_GENTREE
2981 GenTreeFptrVal() : GenTree() {}
2986 struct GenTreeQmark : public GenTreeOp
2988 // Livesets on entry to then and else subtrees
2989 VARSET_TP gtThenLiveSet;
2990 VARSET_TP gtElseLiveSet;
2992 // The "Compiler*" argument is not a DEBUGARG here because we use it to keep track of the set of
2993 // (possible) QMark nodes.
2994 GenTreeQmark(var_types type, GenTreePtr cond, GenTreePtr colonOp, class Compiler* comp);
2996 #if DEBUGGABLE_GENTREE
2997 GenTreeQmark() : GenTreeOp(GT_QMARK, TYP_INT, NULL, NULL) {}
3001 /* gtIntrinsic -- intrinsic (possibly-binary op [NULL op2 is allowed] with an additional field) */
3003 struct GenTreeIntrinsic: public GenTreeOp
3005 CorInfoIntrinsics gtIntrinsicId;
3006 CORINFO_METHOD_HANDLE gtMethodHandle; // Method handle of the method which is treated as an intrinsic.
3008 #ifdef FEATURE_READYTORUN_COMPILER
3009 // Call target lookup info for method call from a Ready To Run module
3010 CORINFO_CONST_LOOKUP gtEntryPoint;
3013 GenTreeIntrinsic(var_types type, GenTreePtr op1, CorInfoIntrinsics intrinsicId, CORINFO_METHOD_HANDLE methodHandle) :
3014 GenTreeOp(GT_INTRINSIC, type, op1, NULL),
3015 gtIntrinsicId(intrinsicId),
3016 gtMethodHandle(methodHandle)
3019 GenTreeIntrinsic(var_types type, GenTreePtr op1, GenTreePtr op2, CorInfoIntrinsics intrinsicId, CORINFO_METHOD_HANDLE methodHandle) :
3020 GenTreeOp(GT_INTRINSIC, type, op1, op2),
3021 gtIntrinsicId(intrinsicId),
3022 gtMethodHandle(methodHandle)
3025 #if DEBUGGABLE_GENTREE
3026 GenTreeIntrinsic() : GenTreeOp() {}
3032 /* gtSIMD -- SIMD intrinsic (possibly-binary op [NULL op2 is allowed] with additional fields) */
3033 struct GenTreeSIMD: public GenTreeOp
3035 SIMDIntrinsicID gtSIMDIntrinsicID; // operation Id
3036 var_types gtSIMDBaseType; // SIMD vector base type
3037 unsigned gtSIMDSize; // SIMD vector size in bytes
3039 GenTreeSIMD(var_types type, GenTreePtr op1, SIMDIntrinsicID simdIntrinsicID, var_types baseType, unsigned size) :
3040 GenTreeOp(GT_SIMD, type, op1, nullptr),
3041 gtSIMDIntrinsicID(simdIntrinsicID),
3042 gtSIMDBaseType(baseType),
3046 GenTreeSIMD(var_types type, GenTreePtr op1, GenTreePtr op2, SIMDIntrinsicID simdIntrinsicID, var_types baseType, unsigned size) :
3047 GenTreeOp(GT_SIMD, type, op1, op2),
3048 gtSIMDIntrinsicID(simdIntrinsicID),
3049 gtSIMDBaseType(baseType),
3053 #if DEBUGGABLE_GENTREE
3054 GenTreeSIMD() : GenTreeOp() {}
3057 #endif // FEATURE_SIMD
3059 /* gtIndex -- array access */
3061 struct GenTreeIndex: public GenTreeOp
3063 GenTreePtr& Arr() { return gtOp1; }
3064 GenTreePtr& Index() { return gtOp2; }
3066 unsigned gtIndElemSize; // size of elements in the array
3067 CORINFO_CLASS_HANDLE gtStructElemClass; // If the element type is a struct, this is the struct type.
3069 GenTreeIndex(var_types type, GenTreePtr arr, GenTreePtr ind, unsigned indElemSize) :
3070 GenTreeOp(GT_INDEX, type, arr, ind),
3071 gtIndElemSize(indElemSize),
3072 gtStructElemClass(nullptr) // We always initialize this after construction.
3075 if (JitConfig.JitSkipArrayBoundCheck() == 1)
3077 // Skip bounds check
3083 gtFlags |= GTF_INX_RNGCHK;
3086 if (type == TYP_REF)
3088 gtFlags |= GTF_INX_REFARR_LAYOUT;
3091 gtFlags |= GTF_EXCEPT|GTF_GLOB_REF;
3093 #if DEBUGGABLE_GENTREE
3094 GenTreeIndex() : GenTreeOp() {}
3098 /* gtArrLen -- array length (GT_ARR_LENGTH)
3099 GT_ARR_LENGTH is used for "arr.length" */
3101 struct GenTreeArrLen: public GenTreeUnOp
3103 GenTreePtr& ArrRef() { return gtOp1; } // the array address node
3105 int gtArrLenOffset; // constant to add to "gtArrRef" to get the address of the array length.
3108 inline int ArrLenOffset() {
3109 return gtArrLenOffset;
3112 GenTreeArrLen(var_types type, GenTreePtr arrRef, int lenOffset) :
3113 GenTreeUnOp(GT_ARR_LENGTH, type, arrRef),
3114 gtArrLenOffset(lenOffset)
3117 #if DEBUGGABLE_GENTREE
3118 GenTreeArrLen() : GenTreeUnOp() {}
3123 // - a comparison value (generally an array length),
3124 // - an index value, and
3125 // - the label to jump to if the index is out of range.
3126 // - the "kind" of the throw block to branch to on failure
3127 // It generates no result.
3129 struct GenTreeBoundsChk: public GenTree
3131 GenTreePtr gtArrLen; // An expression for the length of the array being indexed.
3132 GenTreePtr gtIndex; // The index expression.
3134 GenTreePtr gtIndRngFailBB; // Label to jump to for array-index-out-of-range
3135 SpecialCodeKind gtThrowKind; // Kind of throw block to branch to on failure
3137 /* Only out-of-ranges at same stack depth can jump to the same label (finding return address is easier)
3138 For delayed calling of fgSetRngChkTarget() so that the
3139 optimizer has a chance of eliminating some of the rng checks */
3140 unsigned gtStkDepth;
3142 GenTreeBoundsChk(genTreeOps oper, var_types type, GenTreePtr arrLen, GenTreePtr index, SpecialCodeKind kind) :
3143 GenTree(oper, type),
3144 gtArrLen(arrLen), gtIndex(index),
3145 gtIndRngFailBB(NULL),
3149 // Effects flags propagate upwards.
3150 gtFlags |= (arrLen->gtFlags & GTF_ALL_EFFECT);
3151 gtFlags |= GTF_EXCEPT;
3153 #if DEBUGGABLE_GENTREE
3154 GenTreeBoundsChk() : GenTree() {}
3157 // If the gtArrLen is really an array length, returns array reference, else "NULL".
3158 GenTreePtr GetArray()
3160 if (gtArrLen->OperGet() == GT_ARR_LENGTH)
3162 return gtArrLen->gtArrLen.ArrRef();
3171 // gtArrElem -- general array element (GT_ARR_ELEM), for non "SZ_ARRAYS"
3172 // -- multidimensional arrays, or 1-d arrays with non-zero lower bounds.
3174 struct GenTreeArrElem: public GenTree
3176 GenTreePtr gtArrObj;
3178 #define GT_ARR_MAX_RANK 3
3179 GenTreePtr gtArrInds[GT_ARR_MAX_RANK]; // Indices
3180 unsigned char gtArrRank; // Rank of the array
3182 unsigned char gtArrElemSize; // !!! Caution, this is an "unsigned char", it is used only
3183 // on the optimization path of array intrisics.
3184 // It stores the size of array elements WHEN it can fit
3185 // into an "unsigned char".
3186 // This has caused VSW 571394.
3187 var_types gtArrElemType; // The array element type
3189 // Requires that "inds" is a pointer to an array of "rank" GenTreePtrs for the indices.
3190 GenTreeArrElem(var_types type, GenTreePtr arr, unsigned char rank, unsigned char elemSize, var_types elemType, GenTreePtr* inds) :
3191 GenTree(GT_ARR_ELEM, type),
3192 gtArrObj(arr), gtArrRank(rank), gtArrElemSize(elemSize), gtArrElemType(elemType)
3194 for (unsigned char i = 0; i < rank; i++) gtArrInds[i] = inds[i];
3195 gtFlags |= GTF_EXCEPT;
3197 #if DEBUGGABLE_GENTREE
3198 GenTreeArrElem() : GenTree() {}
3202 //--------------------------------------------
3204 // GenTreeArrIndex (gtArrIndex): Expression to bounds-check the index for one dimension of a
3205 // multi-dimensional or non-zero-based array., and compute the effective index
3206 // (i.e. subtracting the lower bound).
3209 // This node is similar in some ways to GenTreeBoundsChk, which ONLY performs the check.
3210 // The reason that this node incorporates the check into the effective index computation is
3211 // to avoid duplicating the codegen, as the effective index is required to compute the
3213 // TODO-CQ: Enable optimization of the lower bound and length by replacing this:
3216 // +--* ArrIndex[i, ]
3217 // with something like:
3219 // /--* ArrLowerBound[i, ]
3221 // +--* ArrLen[i, ] (either generalize GT_ARR_LENGTH or add a new node)
3223 // +--* ArrIndex[i, ]
3224 // Which could, for example, be optimized to the following when known to be within bounds:
3225 // /--* TempForLowerBoundDim0
3229 struct GenTreeArrIndex: public GenTreeOp
3231 // The array object - may be any expression producing an Array reference, but is likely to be a lclVar.
3232 GenTreePtr& ArrObj() { return gtOp1; }
3233 // The index expression - may be any integral expression.
3234 GenTreePtr& IndexExpr() { return gtOp2; }
3235 unsigned char gtCurrDim; // The current dimension
3236 unsigned char gtArrRank; // Rank of the array
3237 var_types gtArrElemType; // The array element type
3239 GenTreeArrIndex(var_types type, GenTreePtr arrObj, GenTreePtr indexExpr,
3240 unsigned char currDim, unsigned char arrRank, var_types elemType) :
3241 GenTreeOp(GT_ARR_INDEX, type, arrObj, indexExpr),
3242 gtCurrDim(currDim), gtArrRank(arrRank), gtArrElemType(elemType)
3244 gtFlags |= GTF_EXCEPT;
3246 #if DEBUGGABLE_GENTREE
3249 // Used only for GenTree::GetVtableForOper()
3250 GenTreeArrIndex() : GenTreeOp() {}
3254 // Represents either an InitBlk, InitObj, CpBlk or CpObj
3256 struct GenTreeBlkOp : public GenTreeOp
3259 // The destination for the CpBlk/CpObj/InitBlk/InitObj to copy bits to
3261 assert(gtOp1->gtOper == GT_LIST);
3262 return gtOp1->gtOp.gtOp1;
3265 // True if this BlkOpNode is a volatile memory operation.
3266 bool IsVolatile() const { return (gtFlags & GTF_BLK_VOLATILE) != 0; }
3268 // Instruction selection: during codegen time, what code sequence we will be using
3269 // to encode this operation.
3278 bool gtBlkOpGcUnsafe;
3280 GenTreeBlkOp(genTreeOps oper) :
3281 GenTreeOp(oper, TYP_VOID DEBUGARG(true)),
3282 gtBlkOpKind(BlkOpKindInvalid),
3283 gtBlkOpGcUnsafe(false)
3285 assert(OperIsBlkOp(oper));
3288 #if DEBUGGABLE_GENTREE
3291 GenTreeBlkOp() : GenTreeOp(){}
3292 #endif // DEBUGGABLE_GENTREE
3295 // gtObj -- 'object' (GT_OBJ). */
3297 struct GenTreeObj: public GenTreeUnOp
3299 // The address of the block.
3300 GenTreePtr& Addr() { return gtOp1; }
3302 CORINFO_CLASS_HANDLE gtClass; // the class of the object
3304 GenTreeObj(var_types type, GenTreePtr addr, CORINFO_CLASS_HANDLE cls) :
3305 GenTreeUnOp(GT_OBJ, type, addr),
3308 gtFlags |= GTF_GLOB_REF; // An Obj is always a global reference.
3311 #if DEBUGGABLE_GENTREE
3312 GenTreeObj() : GenTreeUnOp() {}
3316 // Represents a CpObj MSIL Node.
3317 struct GenTreeCpObj : public GenTreeBlkOp
3320 // The source for the CpBlk/CpObj to copy bits from
3321 GenTreePtr Source() {
3322 assert(gtOper == GT_COPYOBJ && gtOp1->gtOper == GT_LIST);
3323 return gtOp1->gtOp.gtOp2;
3326 // In the case of CopyObj, this is the class token that represents the type that is being copied.
3327 GenTreePtr ClsTok() { return gtOp2; }
3329 // If non-null, this array represents the gc-layout of the class that is being copied
3333 // If non-zero, this is the number of slots in the class layout that
3334 // contain gc-pointers.
3335 unsigned gtGcPtrCount;
3337 // If non-zero, the number of pointer-sized slots that constitutes the class token in CpObj.
3340 GenTreeCpObj(unsigned gcPtrCount, unsigned gtSlots, BYTE* gtGcPtrs) :
3341 GenTreeBlkOp(GT_COPYOBJ),
3343 gtGcPtrCount(gcPtrCount),
3346 #if DEBUGGABLE_GENTREE
3349 GenTreeCpObj() : GenTreeBlkOp(),
3353 #endif // DEBUGGABLE_GENTREE
3356 // Represents either an InitBlk or InitObj MSIL OpCode.
3357 struct GenTreeInitBlk : public GenTreeBlkOp
3361 // The value used to fill the destination buffer.
3362 GenTreePtr InitVal() { assert(gtOp1->gtOper == GT_LIST);
3363 return gtOp1->gtOp.gtOp2; }
3365 // The size of the buffer to be copied.
3366 GenTreePtr Size() { return gtOp2; }
3368 GenTreeInitBlk() : GenTreeBlkOp(GT_INITBLK){}
3370 #if DEBUGGABLE_GENTREE
3373 #endif // DEBUGGABLE_GENTREE
3376 // Represents a CpBlk or CpObj with no GC-pointers MSIL OpCode.
3377 struct GenTreeCpBlk : public GenTreeBlkOp
3381 // The value used to fill the destination buffer.
3382 // The source for the CpBlk/CpObj to copy bits from
3383 GenTreePtr Source() { assert(gtOp1->gtOper == GT_LIST);
3384 return gtOp1->gtOp.gtOp2; }
3386 // The size of the buffer to be copied.
3387 GenTreePtr Size() { return gtOp2; }
3389 GenTreeCpBlk() : GenTreeBlkOp(GT_COPYBLK){}
3391 #if DEBUGGABLE_GENTREE
3394 #endif // DEBUGGABLE_GENTREE
3397 //--------------------------------------------
3399 // GenTreeArrOffset (gtArrOffset): Expression to compute the accumulated offset for the address
3400 // of an element of a multi-dimensional or non-zero-based array.
3403 // The result of this expression is (gtOffset * dimSize) + gtIndex
3404 // where dimSize is the length/stride/size of the dimension, and is obtained from gtArrObj.
3405 // This node is generated in conjunction with the GenTreeArrIndex node, which computes the
3406 // effective index for a single dimension. The sub-trees can be separately optimized, e.g.
3407 // within a loop body where the expression for the 0th dimension may be invariant.
3409 // Here is an example of how the tree might look for a two-dimension array reference:
3413 // +--* ArrIndex[i, ]
3415 // /--| arrOffs[i, ]
3418 // +--* ArrIndex[*,j]
3420 // /--| arrOffs[*,j]
3421 // TODO-CQ: see comment on GenTreeArrIndex for how its representation may change. When that
3422 // is done, we will also want to replace the <arrObj> argument to arrOffs with the
3423 // ArrLen as for GenTreeArrIndex.
3425 struct GenTreeArrOffs: public GenTree
3427 GenTreePtr gtOffset; // The accumulated offset for lower dimensions - must be TYP_I_IMPL, and
3428 // will either be a CSE temp, the constant 0, or another GenTreeArrOffs node.
3429 GenTreePtr gtIndex; // The effective index for the current dimension - must be non-negative
3430 // and can be any expression (though it is likely to be either a GenTreeArrIndex,
3431 // node, a lclVar, or a constant).
3432 GenTreePtr gtArrObj; // The array object - may be any expression producing an Array reference,
3433 // but is likely to be a lclVar.
3434 unsigned char gtCurrDim; // The current dimension
3435 unsigned char gtArrRank; // Rank of the array
3436 var_types gtArrElemType; // The array element type
3438 GenTreeArrOffs(var_types type, GenTreePtr offset, GenTreePtr index, GenTreePtr arrObj,
3439 unsigned char currDim, unsigned char rank, var_types elemType) :
3440 GenTree(GT_ARR_OFFSET, type), gtOffset(offset), gtIndex(index), gtArrObj(arrObj),
3441 gtCurrDim(currDim), gtArrRank(rank), gtArrElemType(elemType)
3443 assert(index->gtFlags & GTF_EXCEPT);
3444 gtFlags |= GTF_EXCEPT;
3446 #if DEBUGGABLE_GENTREE
3447 GenTreeArrOffs() : GenTree() {}
3451 /* gtAddrMode -- Target-specific canonicalized addressing expression (GT_LEA) */
3453 struct GenTreeAddrMode: public GenTreeOp
3455 // Address is Base + Index*Scale + Offset.
3456 // These are the legal patterns:
3458 // Base // Base != nullptr && Index == nullptr && Scale == 0 && Offset == 0
3459 // Base + Index*Scale // Base != nullptr && Index != nullptr && Scale != 0 && Offset == 0
3460 // Base + Offset // Base != nullptr && Index == nullptr && Scale == 0 && Offset != 0
3461 // Base + Index*Scale + Offset // Base != nullptr && Index != nullptr && Scale != 0 && Offset != 0
3462 // Index*Scale // Base == nullptr && Index != nullptr && Scale > 1 && Offset == 0
3463 // Index*Scale + Offset // Base == nullptr && Index != nullptr && Scale > 1 && Offset != 0
3464 // Offset // Base == nullptr && Index == nullptr && Scale == 0 && Offset != 0
3467 // 1. Base + Index is legal with Scale==1
3468 // 2. If Index is null, Scale should be zero (or unintialized / unused)
3469 // 3. If Scale==1, then we should have "Base" instead of "Index*Scale", and "Base + Offset" instead of "Index*Scale + Offset".
3471 // First operand is base address/pointer
3472 bool HasBase() const { return gtOp1 != nullptr; }
3473 GenTreePtr& Base() { return gtOp1; }
3475 // Second operand is scaled index value
3476 bool HasIndex() const { return gtOp2 != nullptr; }
3477 GenTreePtr& Index() { return gtOp2; }
3479 unsigned gtScale; // The scale factor
3480 unsigned gtOffset; // The offset to add
3482 GenTreeAddrMode(var_types type, GenTreePtr base, GenTreePtr index,
3483 unsigned scale, unsigned offset) :
3484 GenTreeOp(GT_LEA, type, base, index )
3489 #if DEBUGGABLE_GENTREE
3492 // Used only for GenTree::GetVtableForOper()
3493 GenTreeAddrMode() : GenTreeOp() {}
3497 // Indir is just an op, no additional data, but some additional abstractions
3498 struct GenTreeIndir: public GenTreeOp
3500 // like an assign, op1 is the destination
3501 GenTreePtr& Addr() { return gtOp1; }
3503 // these methods provide an interface to the indirection node which
3511 GenTreeIndir(genTreeOps oper, var_types type, GenTree *addr, GenTree *data) :
3512 GenTreeOp(oper, type, addr, data)
3516 #if DEBUGGABLE_GENTREE
3519 // Used only for GenTree::GetVtableForOper()
3520 GenTreeIndir() : GenTreeOp() {}
3524 // Read-modify-write status of a RMW memory op rooted at a storeInd
3526 STOREIND_RMW_STATUS_UNKNOWN, // RMW status of storeInd unknown
3527 // Default status unless modified by IsRMWMemOpRootedAtStoreInd()
3529 // One of these denote storeind is a RMW memory operation.
3530 STOREIND_RMW_DST_IS_OP1, // StoreInd is known to be a RMW memory op and dst candidate is op1
3531 STOREIND_RMW_DST_IS_OP2, // StoreInd is known to be a RMW memory op and dst candidate is op2
3533 // One of these denote the reason for storeind is marked as non-RMW operation
3534 STOREIND_RMW_UNSUPPORTED_ADDR, // Addr mode is not yet supported for RMW memory
3535 STOREIND_RMW_UNSUPPORTED_OPER, // Operation is not supported for RMW memory
3536 STOREIND_RMW_UNSUPPORTED_TYPE, // Type is not supported for RMW memory
3537 STOREIND_RMW_INDIR_UNEQUAL // Indir to read value is not equivalent to indir that writes the value
3540 // StoreInd is just a BinOp, with additional RMW status
3541 struct GenTreeStoreInd: public GenTreeIndir
3543 #if !CPU_LOAD_STORE_ARCH
3544 // The below flag is set and used during lowering
3545 RMWStatus gtRMWStatus;
3547 bool IsRMWStatusUnknown() { return gtRMWStatus == STOREIND_RMW_STATUS_UNKNOWN; }
3548 bool IsNonRMWMemoryOp() {
3549 return gtRMWStatus == STOREIND_RMW_UNSUPPORTED_ADDR ||
3550 gtRMWStatus == STOREIND_RMW_UNSUPPORTED_OPER ||
3551 gtRMWStatus == STOREIND_RMW_UNSUPPORTED_TYPE ||
3552 gtRMWStatus == STOREIND_RMW_INDIR_UNEQUAL;
3554 bool IsRMWMemoryOp() { return gtRMWStatus == STOREIND_RMW_DST_IS_OP1 || gtRMWStatus == STOREIND_RMW_DST_IS_OP2; }
3555 bool IsRMWDstOp1() { return gtRMWStatus == STOREIND_RMW_DST_IS_OP1; }
3556 bool IsRMWDstOp2() { return gtRMWStatus == STOREIND_RMW_DST_IS_OP2; }
3557 #endif //!CPU_LOAD_STORE_ARCH
3559 RMWStatus GetRMWStatus() {
3560 #if !CPU_LOAD_STORE_ARCH
3563 return STOREIND_RMW_STATUS_UNKNOWN;
3567 void SetRMWStatusDefault()
3569 #if !CPU_LOAD_STORE_ARCH
3570 gtRMWStatus = STOREIND_RMW_STATUS_UNKNOWN;
3574 void SetRMWStatus(RMWStatus status)
3576 #if !CPU_LOAD_STORE_ARCH
3577 gtRMWStatus = status;
3581 GenTreePtr& Data() { return gtOp2; }
3583 GenTreeStoreInd(var_types type, GenTree *destPtr, GenTree *data) :
3584 GenTreeIndir(GT_STOREIND, type, destPtr, data)
3586 SetRMWStatusDefault();
3589 #if DEBUGGABLE_GENTREE
3592 // Used only for GenTree::GetVtableForOper()
3593 GenTreeStoreInd() : GenTreeIndir() { SetRMWStatusDefault(); }
3598 /* gtRetExp -- Place holder for the return expression from an inline candidate (GT_RET_EXPR) */
3600 struct GenTreeRetExpr: public GenTree
3602 GenTreePtr gtInlineCandidate;
3604 CORINFO_CLASS_HANDLE gtRetClsHnd;
3606 GenTreeRetExpr(var_types type) :
3607 GenTree(GT_RET_EXPR, type)
3609 #if DEBUGGABLE_GENTREE
3610 GenTreeRetExpr() : GenTree() {}
3615 /* gtStmt -- 'statement expr' (GT_STMT) */
3617 class InlineContext;
3619 struct GenTreeStmt: public GenTree
3621 GenTreePtr gtStmtExpr; // root of the expression tree
3622 GenTreePtr gtStmtList; // first node (for forward walks)
3623 InlineContext* gtInlineContext; // The inline context for this statement.
3625 #if defined(DEBUGGING_SUPPORT) || defined(DEBUG)
3626 IL_OFFSETX gtStmtILoffsx; // instr offset (if available)
3630 IL_OFFSET gtStmtLastILoffs;// instr offset at end of stmt
3633 bool gtStmtIsTopLevel()
3635 return (gtFlags & GTF_STMT_TOP_LEVEL) != 0;
3638 bool gtStmtIsEmbedded()
3640 return !gtStmtIsTopLevel();
3643 // Return the next statement, if it is embedded, otherwise nullptr
3644 GenTreeStmt* gtStmtNextIfEmbedded()
3646 GenTree* nextStmt = gtNext;
3647 if (nextStmt != nullptr && nextStmt->gtStmt.gtStmtIsEmbedded())
3649 return nextStmt->AsStmt();
3657 GenTree* gtStmtNextTopLevelStmt()
3659 GenTree* nextStmt = gtNext;
3660 while (nextStmt != nullptr && nextStmt->gtStmt.gtStmtIsEmbedded())
3662 nextStmt = nextStmt->gtNext;
3667 __declspec(property(get=getNextStmt))
3668 GenTreeStmt* gtNextStmt;
3670 __declspec(property(get=getPrevStmt))
3671 GenTreeStmt* gtPrevStmt;
3673 GenTreeStmt* getNextStmt()
3675 if (gtNext == nullptr)
3678 return gtNext->AsStmt();
3681 GenTreeStmt* getPrevStmt()
3683 if (gtPrev == nullptr)
3686 return gtPrev->AsStmt();
3689 GenTreeStmt(GenTreePtr expr, IL_OFFSETX offset)
3690 : GenTree(GT_STMT, TYP_VOID)
3692 , gtStmtList(nullptr)
3693 , gtInlineContext(nullptr)
3694 #if defined(DEBUGGING_SUPPORT) || defined(DEBUG)
3695 , gtStmtILoffsx(offset)
3698 , gtStmtLastILoffs(BAD_IL_OFFSET)
3701 // Statements can't have statements as part of their expression tree.
3702 assert(expr->gtOper != GT_STMT);
3704 gtFlags |= GTF_STMT_TOP_LEVEL;
3706 // Set the statement to have the same costs as the top node of the tree.
3707 // This is used long before costs have been assigned, so we need to copy
3712 #if DEBUGGABLE_GENTREE
3713 GenTreeStmt() : GenTree(GT_STMT, TYP_VOID) {}
3720 /* NOTE: Any tree nodes that are larger than 8 bytes (two ints or
3721 pointers) must be flagged as 'large' in GenTree::InitNodeSize().
3725 /* gtClsVar -- 'static data member' (GT_CLS_VAR) */
3727 struct GenTreeClsVar: public GenTree
3729 CORINFO_FIELD_HANDLE gtClsVarHnd;
3730 FieldSeqNode* gtFieldSeq;
3732 GenTreeClsVar(var_types type, CORINFO_FIELD_HANDLE clsVarHnd, FieldSeqNode* fldSeq) :
3733 GenTree(GT_CLS_VAR, type),
3734 gtClsVarHnd(clsVarHnd),
3737 gtFlags |= GTF_GLOB_REF;
3739 #if DEBUGGABLE_GENTREE
3740 GenTreeClsVar() : GenTree() {}
3744 /* gtArgPlace -- 'register argument placeholder' (GT_ARGPLACE) */
3746 struct GenTreeArgPlace: public GenTree
3748 CORINFO_CLASS_HANDLE gtArgPlaceClsHnd; // Needed when we have a TYP_STRUCT argument
3750 GenTreeArgPlace(var_types type, CORINFO_CLASS_HANDLE clsHnd) :
3751 GenTree(GT_ARGPLACE, type),
3752 gtArgPlaceClsHnd(clsHnd)
3754 #if DEBUGGABLE_GENTREE
3755 GenTreeArgPlace() : GenTree() {}
3759 /* gtLabel -- code label target (GT_LABEL) */
3761 struct GenTreeLabel: public GenTree
3763 BasicBlock* gtLabBB;
3765 GenTreeLabel(BasicBlock* bb) :
3766 GenTree(GT_LABEL, TYP_VOID),
3769 #if DEBUGGABLE_GENTREE
3770 GenTreeLabel() : GenTree() {}
3774 /* gtPhiArg -- phi node rhs argument, var = phi(phiarg, phiarg, phiarg...); GT_PHI_ARG */
3775 struct GenTreePhiArg: public GenTreeLclVarCommon
3777 BasicBlock * gtPredBB;
3779 GenTreePhiArg(var_types type, unsigned lclNum, unsigned snum, BasicBlock* block)
3780 : GenTreeLclVarCommon(GT_PHI_ARG, type, lclNum)
3786 #if DEBUGGABLE_GENTREE
3787 GenTreePhiArg() : GenTreeLclVarCommon() {}
3791 /* gtPutArgStk -- Argument passed on stack */
3793 struct GenTreePutArgStk: public GenTreeUnOp
3795 unsigned gtSlotNum; // Slot number of the argument to be passed on stack
3797 #if FEATURE_FASTTAILCALL
3798 bool putInIncomingArgArea; // Whether this arg needs to be placed in incoming arg area.
3799 // By default this is false and will be placed in out-going arg area.
3800 // Fast tail calls set this to true.
3801 // In future if we need to add more such bool fields consider bit fields.
3807 FEATURE_UNIX_AMD64_STRUCT_PASSING_ONLY_ARG(unsigned numSlots)
3808 FEATURE_UNIX_AMD64_STRUCT_PASSING_ONLY_ARG(bool isStruct),
3809 bool _putInIncomingArgArea = false
3810 DEBUGARG(GenTreePtr callNode = NULL)
3811 DEBUGARG(bool largeNode = false))
3813 GenTreeUnOp(oper, type DEBUGARG(largeNode)),
3815 putInIncomingArgArea(_putInIncomingArgArea)
3816 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
3817 , gtPutArgStkKind(PutArgStkKindInvalid),
3818 gtNumSlots(numSlots),
3819 gtIsStruct(isStruct),
3820 gtNumberReferenceSlots(0),
3822 #endif // FEATURE_UNIX_AMD64_STRUCT_PASSING
3835 FEATURE_UNIX_AMD64_STRUCT_PASSING_ONLY_ARG(unsigned numSlots)
3836 FEATURE_UNIX_AMD64_STRUCT_PASSING_ONLY_ARG(bool isStruct),
3837 bool _putInIncomingArgArea = false
3838 DEBUGARG(GenTreePtr callNode = NULL)
3839 DEBUGARG(bool largeNode = false))
3841 GenTreeUnOp(oper, type, op1 DEBUGARG(largeNode)),
3843 putInIncomingArgArea(_putInIncomingArgArea)
3844 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
3845 , gtPutArgStkKind(PutArgStkKindInvalid),
3846 gtNumSlots(numSlots),
3847 gtIsStruct(isStruct),
3848 gtNumberReferenceSlots(0),
3850 #endif // FEATURE_UNIX_AMD64_STRUCT_PASSING
3857 #else // !FEATURE_FASTTAILCALL
3863 FEATURE_UNIX_AMD64_STRUCT_PASSING_ONLY_ARG(unsigned numSlots)
3864 FEATURE_UNIX_AMD64_STRUCT_PASSING_ONLY_ARG(bool isStruct)
3865 DEBUGARG(GenTreePtr callNode = NULL)
3866 DEBUGARG(bool largeNode = false))
3868 GenTreeUnOp(oper, type DEBUGARG(largeNode)),
3870 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
3871 , gtPutArgStkKind(PutArgStkKindInvalid),
3872 gtNumSlots(numSlots),
3873 gtIsStruct(isStruct),
3874 gtNumberReferenceSlots(0),
3876 #endif // FEATURE_UNIX_AMD64_STRUCT_PASSING
3889 FEATURE_UNIX_AMD64_STRUCT_PASSING_ONLY_ARG(unsigned numSlots)
3890 FEATURE_UNIX_AMD64_STRUCT_PASSING_ONLY_ARG(bool isStruct)
3891 DEBUGARG(GenTreePtr callNode = NULL)
3892 DEBUGARG(bool largeNode = false))
3894 GenTreeUnOp(oper, type, op1 DEBUGARG(largeNode)),
3896 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
3897 , gtPutArgStkKind(PutArgStkKindInvalid),
3898 gtNumSlots(numSlots),
3899 gtIsStruct(isStruct),
3900 gtNumberReferenceSlots(0),
3902 #endif // FEATURE_UNIX_AMD64_STRUCT_PASSING
3908 #endif // FEATURE_FASTTAILCALL
3910 unsigned getArgOffset() { return gtSlotNum * TARGET_POINTER_SIZE; }
3912 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
3913 unsigned getArgSize() { return gtNumSlots * TARGET_POINTER_SIZE; }
3914 #endif // FEATURE_UNIX_AMD64_STRUCT_PASSING
3916 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
3917 //------------------------------------------------------------------------
3918 // setGcPointers: Sets the number of references and the layout of the struct object returned by the VM.
3921 // numPointers - Number of pointer references.
3922 // pointers - layout of the struct (with pointers marked.)
3928 // This data is used in the codegen for GT_PUTARG_STK to decide how to copy the struct to the stack by value.
3929 // If no pointer references are used, block copying instructions are used.
3930 // Otherwise the pointer reference slots are copied atomically in a way that gcinfo is emitted.
3931 // Any non pointer references between the pointer reference slots are copied in block fashion.
3933 void setGcPointers(unsigned numPointers, BYTE* pointers)
3935 gtNumberReferenceSlots = numPointers;
3936 gtGcPtrs = pointers;
3938 #endif // FEATURE_UNIX_AMD64_STRUCT_PASSING
3941 GenTreePtr gtCall; // the call node to which this argument belongs
3944 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
3945 // Instruction selection: during codegen time, what code sequence we will be using
3946 // to encode this operation.
3948 enum PutArgStkKind : __int8
3950 PutArgStkKindInvalid,
3951 PutArgStkKindRepInstr,
3952 PutArgStkKindUnroll,
3955 PutArgStkKind gtPutArgStkKind;
3957 unsigned gtNumSlots; // Number of slots for the argument to be passed on stack
3958 bool gtIsStruct; // This stack arg is a struct.
3959 unsigned gtNumberReferenceSlots; // Number of reference slots.
3960 BYTE* gtGcPtrs; // gcPointers
3961 #endif // FEATURE_UNIX_AMD64_STRUCT_PASSING
3963 #if DEBUGGABLE_GENTREE
3964 GenTreePutArgStk() : GenTreeUnOp() {}
3968 // Represents GT_COPY or GT_RELOAD node
3969 struct GenTreeCopyOrReload : public GenTreeUnOp
3971 // State required to support copy/reload of a multi-reg call node.
3972 // First register is is always given by gtRegNum.
3974 #if FEATURE_MULTIREG_RET
3975 regNumber gtOtherRegs[MAX_RET_REG_COUNT - 1];
3978 //----------------------------------------------------------
3979 // ClearOtherRegs: set gtOtherRegs to REG_NA.
3987 void ClearOtherRegs()
3989 #if FEATURE_MULTIREG_RET
3990 for (unsigned i = 0; i < MAX_RET_REG_COUNT - 1; ++i)
3992 gtOtherRegs[i] = REG_NA;
3997 //-----------------------------------------------------------
3998 // GetRegNumByIdx: Get regNumber of ith position.
4001 // idx - register position.
4004 // Returns regNumber assigned to ith position.
4006 regNumber GetRegNumByIdx(unsigned idx) const
4008 assert(idx < MAX_RET_REG_COUNT);
4015 #if FEATURE_MULTIREG_RET
4016 return gtOtherRegs[idx - 1];
4022 //-----------------------------------------------------------
4023 // SetRegNumByIdx: Set the regNumber for ith position.
4027 // idx - register position.
4032 // TODO-ARM: Implement this routine for Arm64 and Arm32
4033 // TODO-X86: Implement this routine for x86
4034 void SetRegNumByIdx(regNumber reg, unsigned idx)
4036 assert(idx < MAX_RET_REG_COUNT);
4042 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
4045 gtOtherRegs[idx - 1] = reg;
4046 assert(gtOtherRegs[idx - 1] == reg);
4056 //----------------------------------------------------------------------------
4057 // CopyOtherRegs: copy multi-reg state from the given copy/reload node to this
4061 // from - GenTree node from which to copy multi-reg state
4066 // TODO-ARM: Implement this routine for Arm64 and Arm32
4067 // TODO-X86: Implement this routine for x86
4068 void CopyOtherRegs(GenTreeCopyOrReload* from)
4070 assert(OperGet() == from->OperGet());
4072 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
4073 for (unsigned i = 0; i < MAX_RET_REG_COUNT - 1; ++i)
4075 gtOtherRegs[i] = from->gtOtherRegs[i];
4080 GenTreeCopyOrReload(genTreeOps oper,
4082 GenTree* op1) : GenTreeUnOp(oper, type, op1)
4088 #if DEBUGGABLE_GENTREE
4089 GenTreeCopyOrReload() : GenTreeUnOp() {}
4093 //------------------------------------------------------------------------
4094 // Deferred inline functions of GenTree -- these need the subtypes above to
4095 // be defined already.
4096 //------------------------------------------------------------------------
4098 //------------------------------------------------------------------------
4099 // IsFPZero: Checks whether this is a floating point constant with value 0.0
4102 // Returns true iff the tree is an GT_CNS_DBL, with value of 0.0.
4104 inline bool GenTree::IsFPZero()
4106 if ((gtOper == GT_CNS_DBL) && (gtDblCon.gtDconVal == 0.0))
4111 //------------------------------------------------------------------------
4112 // IsIntegralConst: Checks whether this is a constant node with the given value
4115 // constVal - the value of interest
4118 // Returns true iff the tree is an integral constant opcode, with
4122 // Like gtIconVal, the argument is of ssize_t, so cannot check for
4123 // long constants in a target-independent way.
4125 inline bool GenTree::IsIntegralConst(ssize_t constVal)
4128 if ((gtOper == GT_CNS_INT) && (gtIntConCommon.IconValue() == constVal))
4131 if ((gtOper == GT_CNS_LNG) && (gtIntConCommon.LngValue() == constVal))
4137 inline bool GenTree::IsBoxedValue()
4139 assert(gtOper != GT_BOX || gtBox.BoxOp() != NULL);
4140 return (gtOper == GT_BOX) && (gtFlags & GTF_BOX_VALUE);
4143 inline GenTreePtr GenTree::MoveNext()
4150 //------------------------------------------------------------------------
4151 // IsListForMultiRegArg: Given an GenTree node that represents an argument
4152 // enforce (or don't enforce) the following invariant.
4154 // For LEGACY_BACKEND or architectures that don't support MultiReg args
4155 // we don't allow a GT_LIST at all.
4157 // Currently for AMD64 UNIX we allow a limited case where a GT_LIST is
4158 // allowed but every element must be a GT_LCL_FLD.
4160 // For the future targets that allow for Multireg args (and this includes
4161 // the current ARM64 target) we allow a GT_LIST of arbitrary nodes, these
4162 // would typically start out as GT_LCL_VARs or GT_LCL_FLDS or GT_INDs,
4163 // but could be changed into constants or GT_COMMA trees by the later
4164 // optimization phases.
4167 // instance method for a GenTree node
4170 // true: the GenTree node is accepted as a valid argument
4171 // false: the GenTree node is not accepted as a valid argumeny
4173 inline bool GenTree::IsListForMultiRegArg()
4177 // We don't have a GT_LIST, so just return true.
4180 else // We do have a GT_LIST
4182 #if defined(LEGACY_BACKEND) || !FEATURE_MULTIREG_ARGS
4184 // Not allowed to have a GT_LIST for an argument
4185 // unless we have a RyuJIT backend and FEATURE_MULTIREG_ARGS
4189 #else // we have RyuJIT backend and FEATURE_MULTIREG_ARGS
4191 #ifdef FEATURE_UNIX_AMD64_STRUCT_PASSING
4192 // For UNIX ABI we currently only allow a GT_LIST of GT_LCL_FLDs nodes
4193 GenTree* gtListPtr = this;
4194 while (gtListPtr != nullptr)
4196 // ToDo: fix UNIX_AMD64 so that we do not generate this kind of a List
4197 // Note the list as currently created is malformed, as the last entry is a nullptr
4198 if (gtListPtr->Current() == nullptr)
4201 // Only a list of GT_LCL_FLDs is allowed
4202 if (gtListPtr->Current()->OperGet() != GT_LCL_FLD)
4206 gtListPtr = gtListPtr->MoveNext();
4208 #endif // FEATURE_UNIX_AMD64_STRUCT_PASSING
4210 // Note that for non-UNIX ABI the GT_LIST may contain any node
4212 // We allow this GT_LIST as an argument
4215 #endif // RyuJIT backend and FEATURE_MULTIREG_ARGS
4220 inline GenTreePtr GenTree::Current()
4226 inline GenTreePtr *GenTree::pCurrent()
4229 return &(gtOp.gtOp1);
4232 inline GenTreePtr GenTree::gtGetOp1()
4239 inline bool GenTree::RequiresNonNullOp2(genTreeOps oper)
4292 inline GenTreePtr GenTree::gtGetOp2()
4294 /* gtOp.gtOp2 is only valid for GTK_BINOP nodes. */
4296 GenTreePtr op2 = OperIsBinary() ? gtOp.gtOp2 : nullptr;
4298 // This documents the genTreeOps for which gtOp.gtOp2 cannot be nullptr.
4299 // This helps prefix in its analyis of code which calls gtGetOp2()
4301 assert((op2 != nullptr) || !RequiresNonNullOp2(gtOper));
4306 inline GenTreePtr GenTree::gtEffectiveVal(bool commaOnly)
4311 return gtOp.gtOp2->gtEffectiveVal(commaOnly);
4314 if (!commaOnly && gtOp.gtOp1 != NULL)
4315 return gtOp.gtOp1->gtEffectiveVal();
4325 inline GenTree* GenTree::gtSkipReloadOrCopy()
4327 // There can be only one reload or copy (we can't have a reload/copy of a reload/copy)
4328 if (gtOper == GT_RELOAD || gtOper == GT_COPY)
4330 assert(gtGetOp1()->OperGet() != GT_RELOAD && gtGetOp1()->OperGet() != GT_COPY);
4336 //-----------------------------------------------------------------------------------
4337 // IsMultiRegCall: whether a call node returning its value in more than one register
4343 // Returns true if this GenTree is a multi register returning call
4344 inline bool GenTree::IsMultiRegCall() const
4348 // We cannot use AsCall() as it is not declared const
4349 const GenTreeCall* call = reinterpret_cast<const GenTreeCall *>(this);
4350 return call->HasMultiRegRetVal();
4356 //-------------------------------------------------------------------------
4357 // IsCopyOrReload: whether this is a GT_COPY or GT_RELOAD node.
4363 // Returns true if this GenTree is a copy or reload node.
4364 inline bool GenTree::IsCopyOrReload() const
4366 return (gtOper == GT_COPY || gtOper == GT_RELOAD);
4369 //-----------------------------------------------------------------------------------
4370 // IsCopyOrReloadOfMultiRegCall: whether this is a GT_COPY or GT_RELOAD of a multi-reg
4377 // Returns true if this GenTree is a copy or reload of multi-reg call node.
4378 inline bool GenTree::IsCopyOrReloadOfMultiRegCall() const
4380 if (IsCopyOrReload())
4382 GenTree* t = const_cast<GenTree*>(this);
4383 return t->gtGetOp1()->IsMultiRegCall();
4389 inline bool GenTree::IsCnsIntOrI() const
4391 return (gtOper == GT_CNS_INT);
4394 inline bool GenTree::IsIntegralConst() const
4396 #ifdef _TARGET_64BIT_
4397 return IsCnsIntOrI();
4398 #else // !_TARGET_64BIT_
4399 return ((gtOper == GT_CNS_INT) || (gtOper == GT_CNS_LNG));
4400 #endif // !_TARGET_64BIT_
4403 inline bool GenTree::IsIntCnsFitsInI32()
4405 #ifdef _TARGET_64BIT_
4406 return IsCnsIntOrI() && ((int)gtIntConCommon.IconValue() == gtIntConCommon.IconValue());
4407 #else // !_TARGET_64BIT_
4408 return IsCnsIntOrI();
4409 #endif // !_TARGET_64BIT_
4412 inline bool GenTree::IsCnsFltOrDbl() const
4414 return OperGet() == GT_CNS_DBL;
4417 inline bool GenTree::IsCnsNonZeroFltOrDbl()
4419 if (OperGet() == GT_CNS_DBL)
4421 double constValue = gtDblCon.gtDconVal;
4422 return *(__int64*)&constValue != 0;
4428 inline bool GenTree::IsHelperCall() { return OperGet() == GT_CALL && gtCall.gtCallType == CT_HELPER; }
4430 inline var_types GenTree::CastFromType() { return this->gtCast.CastOp()->TypeGet(); }
4431 inline var_types& GenTree::CastToType() { return this->gtCast.gtCastType; }
4434 /*****************************************************************************/
4436 #ifndef _HOST_64BIT_
4437 #include <poppack.h>
4440 /*****************************************************************************/
4442 #if SMALL_TREE_NODES
4444 // In debug, on some platforms (e.g., when LATE_DISASM is defined), GenTreeIntCon is bigger than GenTreeLclFld.
4446 size_t TREE_NODE_SZ_SMALL = max(sizeof(GenTreeIntCon), sizeof(GenTreeLclFld));
4448 #endif // SMALL_TREE_NODES
4451 size_t TREE_NODE_SZ_LARGE = sizeof(GenTreeCall);
4453 /*****************************************************************************
4454 * Types returned by GenTree::lvaLclVarRefs()
4459 VR_INVARIANT = 0x00, // an invariant value
4461 VR_IND_REF = 0x01, // an object reference
4462 VR_IND_SCL = 0x02, // a non-object reference
4463 VR_GLB_VAR = 0x04, // a global (clsVar)
4465 // Add a temp define to avoid merge conflict.
4466 #define VR_IND_PTR VR_IND_REF
4468 /*****************************************************************************/
4469 #endif // !GENTREE_H
4470 /*****************************************************************************/