/* Target hook definitions.
- Copyright (C) 2001-2014 Free Software Foundation, Inc.
+ Copyright (C) 2001-2017 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
bool, (rtx x, unsigned int size, int aligned_p),
default_assemble_integer)
+/* Notify the backend that we have completed emitting the data for a
+ decl. */
+DEFHOOK
+(decl_end,
+ "Define this hook if the target assembler requires a special marker to\n\
+terminate an initialized variable declaration.",
+ void, (void),
+ hook_void_void)
+
/* Output code that will globalize a label. */
DEFHOOK
(globalize_label,
The default implementation uses the TARGET_ASM_GLOBALIZE_LABEL target hook.",
void, (FILE *stream, tree decl), default_globalize_decl_name)
+/* Output code that will declare an external variable. */
+DEFHOOK
+(assemble_undefined_decl,
+ "This target hook is a function to output to the stdio stream\n\
+@var{stream} some commands that will declare the name associated with\n\
+@var{decl} which is not defined in the current translation unit. Most\n\
+assemblers do not require anything to be output in this case.",
+ void, (FILE *stream, const char *name, const_tree decl),
+ hook_void_FILEptr_constcharptr_const_tree)
+
/* Output code that will emit a label for unwind info, if this
target requires such labels. Second argument is the decl the
unwind info is associated with, third is a boolean: true if
void, (const char *name, unsigned int flags, tree decl),
default_no_named_section)
+/* Tell assembler what section attributes to assign this elf section
+ declaration, using their numerical value. */
+DEFHOOK
+(elf_flags_numeric,
+ "This hook can be used to encode ELF section flags for which no letter\n\
+code has been defined in the assembler. It is called by\n\
+@code{default_asm_named_section} whenever the section flags need to be\n\
+emitted in the assembler output. If the hook returns true, then the\n\
+numerical value for ELF section flags should be calculated from\n\
+@var{flags} and saved in @var{*num}; the value is printed out instead of the\n\
+normal sequence of letter codes. If the hook is not defined, or if it\n\
+returns false, then @var{num} is ignored and the traditional letter sequence\n\
+is emitted.",
+ bool, (unsigned int flags, unsigned int *num),
+ hook_bool_uint_uintp_false)
+
/* Return preferred text (sub)section for function DECL.
Main purpose of this function is to separate cold, normal and hot
functions. STARTUP is true when function is known to be used only
DEFHOOK_UNDOC
(print_operand_address,
"",
- void, (FILE *file, rtx addr),
+ void, (FILE *file, machine_mode mode, rtx addr),
default_print_operand_address)
/* Determine whether CODE is a valid punctuation character for the
DEFHOOK
(adjust_cost,
"This function corrects the value of @var{cost} based on the\n\
-relationship between @var{insn} and @var{dep_insn} through the\n\
-dependence @var{link}. It should return the new value. The default\n\
-is to make no adjustment to @var{cost}. This can be used for example\n\
-to specify to the scheduler using the traditional pipeline description\n\
-that an output- or anti-dependence does not incur the same cost as a\n\
-data-dependence. If the scheduler using the automaton based pipeline\n\
+relationship between @var{insn} and @var{dep_insn} through a\n\
+dependence of type dep_type, and strength @var{dw}. It should return the new\n\
+value. The default is to make no adjustment to @var{cost}. This can be\n\
+used for example to specify to the scheduler using the traditional pipeline\n\
+description that an output- or anti-dependence does not incur the same cost\n\
+as a data-dependence. If the scheduler using the automaton based pipeline\n\
description, the cost of anti-dependence is zero and the cost of\n\
output-dependence is maximum of one and the difference of latency\n\
times of the first and the second insns. If these values are not\n\
acceptable, you could use the hook to modify them too. See also\n\
@pxref{Processor pipeline description}.",
- int, (rtx_insn *insn, rtx link, rtx_insn *dep_insn, int cost), NULL)
+ int, (rtx_insn *insn, int dep_type1, rtx_insn *dep_insn, int cost,
+ unsigned int dw),
+ NULL)
/* Adjust the priority of an insn as you see fit. Returns the new priority. */
DEFHOOK
DEFHOOK
(macro_fusion_pair_p,
- "This hook is used to check whether two insns could be macro fused for\n\
-target microarchitecture. If this hook returns true for the given insn pair\n\
-(@var{condgen} and @var{condjmp}), scheduler will put them into a sched\n\
-group, and they will not be scheduled apart.",
- bool, (rtx_insn *condgen, rtx_insn *condjmp), NULL)
+ "This hook is used to check whether two insns should be macro fused for\n\
+a target microarchitecture. If this hook returns true for the given insn pair\n\
+(@var{prev} and @var{curr}), the scheduler will put them into a sched\n\
+group, and they will not be scheduled apart. The two insns will be either\n\
+two SET insns or a compare and a conditional jump and this hook should\n\
+validate any dependencies needed to fuse the two insns together.",
+ bool, (rtx_insn *prev, rtx_insn *curr), NULL)
/* The following member value is a pointer to a function called
after evaluation forward dependencies of insns in chain given
not in cases of ``costly dependences'', which this hooks allows to define.",
bool, (struct _dep *_dep, int cost, int distance), NULL)
-DEFHOOK_UNDOC
-(adjust_cost_2,
- "Given the current cost, @var{cost}, of an insn, @var{insn}, calculate and\
- return a new cost based on its relationship to @var{dep_insn} through the\
- dependence of weakness @var{dw}. The default is to make no adjustment.",
- int, (rtx_insn *insn, int dep_type1, rtx_insn *dep_insn, int cost,
- unsigned int dw),
- NULL)
-
/* The following member value is a pointer to a function called
by the insn scheduler. This hook is called to notify the backend
that new instructions were emitted. */
int, (unsigned int opc, machine_mode mode),
hook_int_uint_mode_1)
+/* The following member value is a function that returns priority for
+ fusion of each instruction via pointer parameters. */
+DEFHOOK
+(fusion_priority,
+"This hook is called by scheduling fusion pass. It calculates fusion\n\
+priorities for each instruction passed in by parameter. The priorities\n\
+are returned via pointer parameters.\n\
+\n\
+@var{insn} is the instruction whose priorities need to be calculated.\n\
+@var{max_pri} is the maximum priority can be returned in any cases.\n\
+@var{fusion_pri} is the pointer parameter through which @var{insn}'s\n\
+fusion priority should be calculated and returned.\n\
+@var{pri} is the pointer parameter through which @var{insn}'s priority\n\
+should be calculated and returned.\n\
+\n\
+Same @var{fusion_pri} should be returned for instructions which should\n\
+be scheduled together. Different @var{pri} should be returned for\n\
+instructions with same @var{fusion_pri}. @var{fusion_pri} is the major\n\
+sort key, @var{pri} is the minor sort key. All instructions will be\n\
+scheduled according to the two priorities. All priorities calculated\n\
+should be between 0 (exclusive) and @var{max_pri} (inclusive). To avoid\n\
+false dependencies, @var{fusion_pri} of instructions which need to be\n\
+scheduled together should be smaller than @var{fusion_pri} of irrelevant\n\
+instructions.\n\
+\n\
+Given below example:\n\
+\n\
+@smallexample\n\
+ ldr r10, [r1, 4]\n\
+ add r4, r4, r10\n\
+ ldr r15, [r2, 8]\n\
+ sub r5, r5, r15\n\
+ ldr r11, [r1, 0]\n\
+ add r4, r4, r11\n\
+ ldr r16, [r2, 12]\n\
+ sub r5, r5, r16\n\
+@end smallexample\n\
+\n\
+On targets like ARM/AArch64, the two pairs of consecutive loads should be\n\
+merged. Since peephole2 pass can't help in this case unless consecutive\n\
+loads are actually next to each other in instruction flow. That's where\n\
+this scheduling fusion pass works. This hook calculates priority for each\n\
+instruction based on its fustion type, like:\n\
+\n\
+@smallexample\n\
+ ldr r10, [r1, 4] ; fusion_pri=99, pri=96\n\
+ add r4, r4, r10 ; fusion_pri=100, pri=100\n\
+ ldr r15, [r2, 8] ; fusion_pri=98, pri=92\n\
+ sub r5, r5, r15 ; fusion_pri=100, pri=100\n\
+ ldr r11, [r1, 0] ; fusion_pri=99, pri=100\n\
+ add r4, r4, r11 ; fusion_pri=100, pri=100\n\
+ ldr r16, [r2, 12] ; fusion_pri=98, pri=88\n\
+ sub r5, r5, r16 ; fusion_pri=100, pri=100\n\
+@end smallexample\n\
+\n\
+Scheduling fusion pass then sorts all ready to issue instructions according\n\
+to the priorities. As a result, instructions of same fusion type will be\n\
+pushed together in instruction flow, like:\n\
+\n\
+@smallexample\n\
+ ldr r11, [r1, 0]\n\
+ ldr r10, [r1, 4]\n\
+ ldr r15, [r2, 8]\n\
+ ldr r16, [r2, 12]\n\
+ add r4, r4, r10\n\
+ sub r5, r5, r15\n\
+ add r4, r4, r11\n\
+ sub r5, r5, r16\n\
+@end smallexample\n\
+\n\
+Now peephole2 pass can simply merge the two pairs of loads.\n\
+\n\
+Since scheduling fusion pass relies on peephole2 to do real fusion\n\
+work, it is only enabled by default when peephole2 is in effect.\n\
+\n\
+This is firstly introduced on ARM/AArch64 targets, please refer to\n\
+the hook implementation for how different fusion types are supported.",
+void, (rtx_insn *insn, int max_pri, int *fusion_pri, int *pri), NULL)
+
HOOK_VECTOR_END (sched)
/* Functions relating to OpenMP and Cilk Plus SIMD clones. */
HOOK_VECTOR_END (simd_clone)
+/* Functions relating to OpenMP SIMT vectorization transform. */
+#undef HOOK_PREFIX
+#define HOOK_PREFIX "TARGET_SIMT_"
+HOOK_VECTOR (TARGET_SIMT, simt)
+
+DEFHOOK
+(vf,
+"Return number of threads in SIMT thread group on the target.",
+int, (void), NULL)
+
+HOOK_VECTOR_END (simt)
+
+/* Functions relating to openacc. */
+#undef HOOK_PREFIX
+#define HOOK_PREFIX "TARGET_GOACC_"
+HOOK_VECTOR (TARGET_GOACC, goacc)
+
+DEFHOOK
+(validate_dims,
+"This hook should check the launch dimensions provided for an OpenACC\n\
+compute region, or routine. Defaulted values are represented as -1\n\
+and non-constant values as 0. The @var{fn_level} is negative for the\n\
+function corresponding to the compute region. For a routine is is the\n\
+outermost level at which partitioned execution may be spawned. The hook\n\
+should verify non-default values. If DECL is NULL, global defaults\n\
+are being validated and unspecified defaults should be filled in.\n\
+Diagnostics should be issued as appropriate. Return\n\
+true, if changes have been made. You must override this hook to\n\
+provide dimensions larger than 1.",
+bool, (tree decl, int *dims, int fn_level),
+default_goacc_validate_dims)
+
+DEFHOOK
+(dim_limit,
+"This hook should return the maximum size of a particular dimension,\n\
+or zero if unbounded.",
+int, (int axis),
+default_goacc_dim_limit)
+
+DEFHOOK
+(fork_join,
+"This hook can be used to convert IFN_GOACC_FORK and IFN_GOACC_JOIN\n\
+function calls to target-specific gimple, or indicate whether they\n\
+should be retained. It is executed during the oacc_device_lower pass.\n\
+It should return true, if the call should be retained. It should\n\
+return false, if it is to be deleted (either because target-specific\n\
+gimple has been inserted before it, or there is no need for it).\n\
+The default hook returns false, if there are no RTL expanders for them.",
+bool, (gcall *call, const int *dims, bool is_fork),
+default_goacc_fork_join)
+
+DEFHOOK
+(reduction,
+"This hook is used by the oacc_transform pass to expand calls to the\n\
+@var{GOACC_REDUCTION} internal function, into a sequence of gimple\n\
+instructions. @var{call} is gimple statement containing the call to\n\
+the function. This hook removes statement @var{call} after the\n\
+expanded sequence has been inserted. This hook is also responsible\n\
+for allocating any storage for reductions when necessary.",
+void, (gcall *call),
+default_goacc_reduction)
+
+HOOK_VECTOR_END (goacc)
+
/* Functions relating to vectorization. */
#undef HOOK_PREFIX
#define HOOK_PREFIX "TARGET_VECTORIZE_"
log2(@var{VS}) @minus{} 1 bits of @var{addr} will be considered.",
tree, (void), NULL)
-/* Returns a code for builtin that realizes vectorized version of
- function, or NULL_TREE if not available. */
+/* Returns a built-in function that realizes the vectorized version of
+ a target-independent function, or NULL_TREE if not available. */
DEFHOOK
(builtin_vectorized_function,
"This hook should return the decl of a function that implements the\n\
-vectorized variant of the builtin function with builtin function code\n\
+vectorized variant of the function with the @code{combined_fn} code\n\
@var{code} or @code{NULL_TREE} if such a function is not available.\n\
-The value of @var{fndecl} is the builtin function declaration. The\n\
+The return type of the vectorized function shall be of vector type\n\
+@var{vec_type_out} and the argument types should be @var{vec_type_in}.",
+ tree, (unsigned code, tree vec_type_out, tree vec_type_in),
+ default_builtin_vectorized_function)
+
+/* Returns a built-in function that realizes the vectorized version of
+ a target-specific function, or NULL_TREE if not available. */
+DEFHOOK
+(builtin_md_vectorized_function,
+ "This hook should return the decl of a function that implements the\n\
+vectorized variant of target built-in function @code{fndecl}. The\n\
return type of the vectorized function shall be of vector type\n\
@var{vec_type_out} and the argument types should be @var{vec_type_in}.",
tree, (tree fndecl, tree vec_type_out, tree vec_type_in),
- default_builtin_vectorized_function)
+ default_builtin_md_vectorized_function)
/* Returns a function declaration for a builtin that realizes the
vector conversion, or NULL_TREE if not available. */
default_builtin_vectorization_cost)
/* Return true if vector alignment is reachable (by peeling N
- iterations) for the given type. */
+ iterations) for the given scalar type. */
DEFHOOK
(vector_alignment_reachable,
- "Return true if vector alignment is reachable (by peeling N iterations) for the given type.",
+ "Return true if vector alignment is reachable (by peeling N iterations) for the given scalar type @var{type}. @var{is_packed} is false if the scalar access using @var{type} is known to be naturally aligned.",
bool, (const_tree type, bool is_packed),
default_builtin_vector_alignment_reachable)
(machine_mode mode, const_tree type, int misalignment, bool is_packed),
default_builtin_support_vector_misalignment)
-/* Return the builtin decl needed to load a vector of TYPE. */
-DEFHOOK
-(builtin_tm_load,
- "This hook should return the built-in decl needed to load a vector of the "
- "given type within a transaction.",
- tree,
- (tree),
- default_builtin_tm_load_store)
-
-/* Return the builtin decl needed to store a vector of TYPE. */
-DEFHOOK
-(builtin_tm_store,
- "This hook should return the built-in decl needed to store a vector of the "
- "given type within a transaction.",
- tree,
- (tree),
- default_builtin_tm_load_store)
-
/* Returns the preferred mode for SIMD operations for the specified
scalar mode. */
DEFHOOK
(void),
default_autovectorize_vector_sizes)
+/* Function to get a target mode for a vector mask. */
+DEFHOOK
+(get_mask_mode,
+ "This hook returns mode to be used for a mask to be used for a vector\n\
+of specified @var{length} with @var{nunits} elements. By default an integer\n\
+vector mode of a proper size is returned.",
+ machine_mode,
+ (unsigned nunits, unsigned length),
+ default_get_mask_mode)
+
/* Target builtin that implements vector gather operation. */
DEFHOOK
(builtin_gather,
(const_tree mem_vectype, const_tree index_type, int scale),
NULL)
+/* Target builtin that implements vector scatter operation. */
+DEFHOOK
+(builtin_scatter,
+"Target builtin that implements vector scatter operation. @var{vectype}\n\
+is the vector type of the store and @var{index_type} is scalar type of\n\
+the index, scaled by @var{scale}.\n\
+The default is @code{NULL_TREE} which means to not vectorize scatter\n\
+stores.",
+ tree,
+ (const_tree vectype, const_tree index_type, int scale),
+ NULL)
+
/* Target function to initialize the cost model for a loop or block. */
DEFHOOK
(init_cost,
#undef HOOK_PREFIX
#define HOOK_PREFIX "TARGET_"
+DEFHOOK
+(record_offload_symbol,
+ "Used when offloaded functions are seen in the compilation unit and no named\n\
+sections are available. It is called once for each symbol that must be\n\
+recorded in the offload function and variable table.",
+ void, (tree),
+ hook_void_tree)
+
+DEFHOOKPOD
+(absolute_biggest_alignment,
+ "If defined, this target hook specifies the absolute biggest alignment\n\
+that a type or variable can have on this machine, otherwise,\n\
+@code{BIGGEST_ALIGNMENT} is used.",
+ HOST_WIDE_INT, BIGGEST_ALIGNMENT)
+
/* Allow target specific overriding of option settings after options have
been changed by an attribute or pragma or when it is reset at the
end of the code affected by an attribute or pragma. */
void, (void),
hook_void_void)
+DEFHOOK
+(offload_options,
+ "Used when writing out the list of options into an LTO file. It should\n\
+translate any relevant target-specific options (such as the ABI in use)\n\
+into one of the @option{-foffload} options that exist as a common interface\n\
+to express such options. It should return a string containing these options,\n\
+separated by spaces, which the caller will free.\n",
+char *, (void), hook_charptr_void_null)
+
DEFHOOK_UNDOC
(eh_return_filter_mode,
"Return machine mode for filter value.",
DEFHOOKPOD
(attribute_table,
"If defined, this target hook points to an array of @samp{struct\n\
-attribute_spec} (defined in @file{tree.h}) specifying the machine\n\
+attribute_spec} (defined in @file{tree-core.h}) specifying the machine\n\
specific attributes for this target and some of the restrictions on the\n\
entities to which these attributes are applied and the arguments they\n\
take.",
(tree exp, rtx target, rtx subtarget, machine_mode mode, int ignore),
default_expand_builtin)
+DEFHOOK
+(builtin_chkp_function,
+ "This hook allows target to redefine built-in functions used by\n\
+Pointer Bounds Checker for code instrumentation. Hook should return\n\
+fndecl of function implementing generic builtin whose code is\n\
+passed in @var{fcode}. Currently following built-in functions are\n\
+obtained using this hook:\n\
+@deftypefn {Built-in Function} __bounds_type __chkp_bndmk (const void *@var{lb}, size_t @var{size})\n\
+Function code - BUILT_IN_CHKP_BNDMK. This built-in function is used\n\
+by Pointer Bounds Checker to create bound values. @var{lb} holds low\n\
+bound of the resulting bounds. @var{size} holds size of created bounds.\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} void __chkp_bndstx (const void *@var{ptr}, __bounds_type @var{b}, const void **@var{loc})\n\
+Function code - @code{BUILT_IN_CHKP_BNDSTX}. This built-in function is used\n\
+by Pointer Bounds Checker to store bounds @var{b} for pointer @var{ptr}\n\
+when @var{ptr} is stored by address @var{loc}.\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} __bounds_type __chkp_bndldx (const void **@var{loc}, const void *@var{ptr})\n\
+Function code - @code{BUILT_IN_CHKP_BNDLDX}. This built-in function is used\n\
+by Pointer Bounds Checker to get bounds of pointer @var{ptr} loaded by\n\
+address @var{loc}.\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} void __chkp_bndcl (const void *@var{ptr}, __bounds_type @var{b})\n\
+Function code - @code{BUILT_IN_CHKP_BNDCL}. This built-in function is used\n\
+by Pointer Bounds Checker to perform check for pointer @var{ptr} against\n\
+lower bound of bounds @var{b}.\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} void __chkp_bndcu (const void *@var{ptr}, __bounds_type @var{b})\n\
+Function code - @code{BUILT_IN_CHKP_BNDCU}. This built-in function is used\n\
+by Pointer Bounds Checker to perform check for pointer @var{ptr} against\n\
+upper bound of bounds @var{b}.\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} __bounds_type __chkp_bndret (void *@var{ptr})\n\
+Function code - @code{BUILT_IN_CHKP_BNDRET}. This built-in function is used\n\
+by Pointer Bounds Checker to obtain bounds returned by a call statement.\n\
+@var{ptr} passed to built-in is @code{SSA_NAME} returned by the call.\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} __bounds_type __chkp_intersect (__bounds_type @var{b1}, __bounds_type @var{b2})\n\
+Function code - @code{BUILT_IN_CHKP_INTERSECT}. This built-in function\n\
+returns intersection of bounds @var{b1} and @var{b2}.\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} __bounds_type __chkp_narrow (const void *@var{ptr}, __bounds_type @var{b}, size_t @var{s})\n\
+Function code - @code{BUILT_IN_CHKP_NARROW}. This built-in function\n\
+returns intersection of bounds @var{b} and\n\
+[@var{ptr}, @var{ptr} + @var{s} - @code{1}].\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} size_t __chkp_sizeof (const void *@var{ptr})\n\
+Function code - @code{BUILT_IN_CHKP_SIZEOF}. This built-in function\n\
+returns size of object referenced by @var{ptr}. @var{ptr} is always\n\
+@code{ADDR_EXPR} of @code{VAR_DECL}. This built-in is used by\n\
+Pointer Bounds Checker when bounds of object cannot be computed statically\n\
+(e.g. object has incomplete type).\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} const void *__chkp_extract_lower (__bounds_type @var{b})\n\
+Function code - @code{BUILT_IN_CHKP_EXTRACT_LOWER}. This built-in function\n\
+returns lower bound of bounds @var{b}.\n\
+@end deftypefn\n\
+\n\
+@deftypefn {Built-in Function} const void *__chkp_extract_upper (__bounds_type @var{b})\n\
+Function code - @code{BUILT_IN_CHKP_EXTRACT_UPPER}. This built-in function\n\
+returns upper bound of bounds @var{b}.\n\
+@end deftypefn",
+ tree, (unsigned fcode),
+ default_builtin_chkp_function)
+
+DEFHOOK
+(chkp_bound_type,
+ "Return type to be used for bounds",
+ tree, (void),
+ default_chkp_bound_type)
+
+DEFHOOK
+(chkp_bound_mode,
+ "Return mode to be used for bounds.",
+ enum machine_mode, (void),
+ default_chkp_bound_mode)
+
+DEFHOOK
+(chkp_make_bounds_constant,
+ "Return constant used to statically initialize constant bounds\n\
+with specified lower bound @var{lb} and upper bounds @var{ub}.",
+ tree, (HOST_WIDE_INT lb, HOST_WIDE_INT ub),
+ default_chkp_make_bounds_constant)
+
+DEFHOOK
+(chkp_initialize_bounds,
+ "Generate a list of statements @var{stmts} to initialize pointer\n\
+bounds variable @var{var} with bounds @var{lb} and @var{ub}. Return\n\
+the number of generated statements.",
+ int, (tree var, tree lb, tree ub, tree *stmts),
+ default_chkp_initialize_bounds)
+
/* Select a replacement for a target-specific builtin. This is done
*before* regular type checking, and so allows the target to
implement a crude form of function overloading. The result is a
tree, (void *decl), NULL)
/* Returns a code for a target-specific builtin that implements
- reciprocal of the function, or NULL_TREE if not available. */
+ reciprocal of a target-specific function, or NULL_TREE if not available. */
DEFHOOK
(builtin_reciprocal,
- "This hook should return the DECL of a function that implements reciprocal of\n\
-the builtin function with builtin function code @var{fn}, or\n\
-@code{NULL_TREE} if such a function is not available. @var{md_fn} is true\n\
-when @var{fn} is a code of a machine-dependent builtin function. When\n\
-@var{sqrt} is true, additional optimizations that apply only to the reciprocal\n\
-of a square root function are performed, and only reciprocals of @code{sqrt}\n\
-function are valid.",
- tree, (unsigned fn, bool md_fn, bool sqrt),
+ "This hook should return the DECL of a function that implements the\n\
+reciprocal of the machine-specific builtin function @var{fndecl}, or\n\
+@code{NULL_TREE} if such a function is not available.",
+ tree, (tree fndecl),
default_builtin_reciprocal)
/* For a vendor-specific TYPE, return a pointer to a statically-allocated
bool, (void),
default_have_conditional_execution)
+DEFHOOK
+(gen_ccmp_first,
+ "This function prepares to emit a comparison insn for the first compare in a\n\
+ sequence of conditional comparisions. It returns an appropriate comparison\n\
+ with @code{CC} for passing to @code{gen_ccmp_next} or @code{cbranch_optab}.\n\
+ The insns to prepare the compare are saved in @var{prep_seq} and the compare\n\
+ insns are saved in @var{gen_seq}. They will be emitted when all the\n\
+ compares in the the conditional comparision are generated without error.\n\
+ @var{code} is the @code{rtx_code} of the compare for @var{op0} and @var{op1}.",
+ rtx, (rtx_insn **prep_seq, rtx_insn **gen_seq, int code, tree op0, tree op1),
+ NULL)
+
+DEFHOOK
+(gen_ccmp_next,
+ "This function prepares to emit a conditional comparison within a sequence\n\
+ of conditional comparisons. It returns an appropriate comparison with\n\
+ @code{CC} for passing to @code{gen_ccmp_next} or @code{cbranch_optab}.\n\
+ The insns to prepare the compare are saved in @var{prep_seq} and the compare\n\
+ insns are saved in @var{gen_seq}. They will be emitted when all the\n\
+ compares in the conditional comparision are generated without error. The\n\
+ @var{prev} expression is the result of a prior call to @code{gen_ccmp_first}\n\
+ or @code{gen_ccmp_next}. It may return @code{NULL} if the combination of\n\
+ @var{prev} and this comparison is not supported, otherwise the result must\n\
+ be appropriate for passing to @code{gen_ccmp_next} or @code{cbranch_optab}.\n\
+ @var{code} is the @code{rtx_code} of the compare for @var{op0} and @var{op1}.\n\
+ @var{bit_code} is @code{AND} or @code{IOR}, which is the op on the compares.",
+ rtx, (rtx_insn **prep_seq, rtx_insn **gen_seq, rtx prev, int cmp_code, tree op0, tree op1, int bit_code),
+ NULL)
+
/* Return a new value for loop unroll size. */
DEFHOOK
(loop_unroll_adjust,
(pointer_mode,
"Define this to return the machine mode to use for pointers to\n\
@var{address_space} if the target supports named address spaces.\n\
-The default version of this hook returns @code{ptr_mode} for the\n\
-generic address space only.",
+The default version of this hook returns @code{ptr_mode}.",
machine_mode, (addr_space_t address_space),
default_addr_space_pointer_mode)
(address_mode,
"Define this to return the machine mode to use for addresses in\n\
@var{address_space} if the target supports named address spaces.\n\
-The default version of this hook returns @code{Pmode} for the\n\
-generic address space only.",
+The default version of this hook returns @code{Pmode}.",
machine_mode, (addr_space_t address_space),
default_addr_space_address_mode)
bool, (addr_space_t subset, addr_space_t superset),
default_addr_space_subset_p)
+/* True if 0 is a valid address in the address space, or false if
+ 0 is a NULL in the address space. */
+DEFHOOK
+(zero_address_valid,
+ "Define this to modify the default handling of address 0 for the\n\
+address space. Return true if 0 should be considered a valid address.",
+ bool, (addr_space_t as),
+ default_addr_space_zero_address_valid)
+
/* Function to convert an rtl expression from one address space to another. */
DEFHOOK
(convert,
rtx, (rtx op, tree from_type, tree to_type),
default_addr_space_convert)
+/* Function to encode an address space into dwarf. */
+DEFHOOK
+(debug,
+ "Define this to define how the address space is encoded in dwarf.\n\
+The result is the value to be used with @code{DW_AT_address_class}.",
+ int, (addr_space_t as),
+ default_addr_space_debug)
+
+/* Function to emit custom diagnostic if an address space is used. */
+DEFHOOK
+(diagnose_usage,
+ "Define this hook if the availability of an address space depends on\n\
+command line options and some diagnostics should be printed when the\n\
+address space is used. This hook is called during parsing and allows\n\
+to emit a better diagnostic compared to the case where the address space\n\
+was not registered with @code{c_register_addr_space}. @var{as} is\n\
+the address space as registered with @code{c_register_addr_space}.\n\
+@var{loc} is the location of the address space qualifier token.\n\
+The default implementation does nothing.",
+ void, (addr_space_t as, location_t loc),
+ default_addr_space_diagnose_usage)
+
HOOK_VECTOR_END (addr_space)
#undef HOOK_PREFIX
bool, (machine_mode mode),
default_libgcc_floating_mode_supported_p)
+DEFHOOK
+(floatn_mode,
+ "Define this to return the machine mode to use for the type \n\
+@code{_Float@var{n}}, if @var{extended} is false, or the type \n\
+@code{_Float@var{n}x}, if @var{extended} is true. If such a type \n\
+is not supported, return @code{VOIDmode}. The default version of this \n\
+hook returns @code{SFmode} for @code{_Float32}, @code{DFmode} for \n\
+@code{_Float64} and @code{_Float32x} and @code{TFmode} for \n\
+@code{_Float128}, if those modes exist and satisfy the requirements for \n\
+those types and pass @code{TARGET_SCALAR_MODE_SUPPORTED_P} and \n\
+@code{TARGET_LIBGCC_FLOATING_MODE_SUPPORTED_P}; for @code{_Float64x}, it \n\
+returns the first of @code{XFmode} and @code{TFmode} that exists and \n\
+satisfies the same requirements; for other types, it returns \n\
+@code{VOIDmode}. The hook is only called for values of @var{n} and \n\
+@var{extended} that are valid according to ISO/IEC TS 18661-3:2015; that \n\
+is, @var{n} is one of 32, 64, 128, or, if @var{extended} is false, 16 or \n\
+greater than 128 and a multiple of 32.",
+ machine_mode, (int n, bool extended),
+ default_floatn_mode)
+
/* Compute cost of moving data from a register of class FROM to one of
TO, using MODE. */
DEFHOOK
units.\n\
\n\
The parameter @var{op} is one of: @code{CLEAR_BY_PIECES},\n\
-@code{MOVE_BY_PIECES}, @code{SET_BY_PIECES}, @code{STORE_BY_PIECES}.\n\
-These describe the type of memory operation under consideration.\n\
+@code{MOVE_BY_PIECES}, @code{SET_BY_PIECES}, @code{STORE_BY_PIECES} or\n\
+@code{COMPARE_BY_PIECES}. These describe the type of memory operation\n\
+under consideration.\n\
\n\
The parameter @var{speed_p} is true if the code is currently being\n\
optimized for speed rather than size.\n\
Returning true for higher values of @code{size} may also cause an increase\n\
in code size, for example where the number of insns emitted to perform a\n\
move would be greater than that of a library call.",
- bool, (unsigned int size, unsigned int alignment,
+ bool, (unsigned HOST_WIDE_INT size, unsigned int alignment,
enum by_pieces_operation op, bool speed_p),
default_use_by_pieces_infrastructure_p)
+DEFHOOK
+(compare_by_pieces_branch_ratio,
+ "When expanding a block comparison in MODE, gcc can try to reduce the\n\
+number of branches at the expense of more memory operations. This hook\n\
+allows the target to override the default choice. It should return the\n\
+factor by which branches should be reduced over the plain expansion with\n\
+one comparison per @var{mode}-sized piece. A port can also prevent a\n\
+particular mode from being used for block comparisons by returning a\n\
+negative number from this hook.",
+ int, (machine_mode mode),
+ default_compare_by_pieces_branch_ratio)
+
+DEFHOOK
+(optab_supported_p,
+ "Return true if the optimizers should use optab @var{op} with\n\
+modes @var{mode1} and @var{mode2} for optimization type @var{opt_type}.\n\
+The optab is known to have an associated @file{.md} instruction\n\
+whose C condition is true. @var{mode2} is only meaningful for conversion\n\
+optabs; for direct optabs it is a copy of @var{mode1}.\n\
+\n\
+For example, when called with @var{op} equal to @code{rint_optab} and\n\
+@var{mode1} equal to @code{DFmode}, the hook should say whether the\n\
+optimizers should use optab @code{rintdf2}.\n\
+\n\
+The default hook returns true for all inputs.",
+ bool, (int op, machine_mode mode1, machine_mode mode2,
+ optimization_type opt_type),
+ default_optab_supported_p)
+
/* True for MODE if the target expects that registers in this mode will
be allocated to registers in a small register class. The compiler is
allowed to use registers explicitly used in the rtl as spill registers
/* Compute a (partial) cost for rtx X. Return true if the complete
cost has been computed, and false if subexpressions should be
scanned. In either case, *TOTAL contains the cost result. */
-/* Note that CODE and OUTER_CODE ought to be RTX_CODE, but that's
+/* Note that OUTER_CODE ought to be RTX_CODE, but that's
not necessarily defined at this point. */
DEFHOOK
(rtx_costs,
either (a) @samp{XEXP (@var{y}, @var{opno}) == @var{x}} or\n\
(b) @samp{XVEC (@var{y}, @var{opno})} contains @var{x}.\n\
\n\
-@var{code} is @var{x}'s expression code---redundant, since it can be\n\
-obtained with @code{GET_CODE (@var{x})}.\n\
+@var{mode} is @var{x}'s machine mode, or for cases like @code{const_int} that\n\
+do not have a mode, the mode in which @var{x} is used.\n\
\n\
In implementing this hook, you can use the construct\n\
@code{COSTS_N_INSNS (@var{n})} to specify a cost equal to @var{n} fast\n\
\n\
The hook returns true when all subexpressions of @var{x} have been\n\
processed, and false when @code{rtx_cost} should recurse.",
- bool, (rtx x, int code, int outer_code, int opno, int *total, bool speed),
- hook_bool_rtx_int_int_int_intp_bool_false)
+ bool, (rtx x, machine_mode mode, int outer_code, int opno, int *total, bool speed),
+ hook_bool_rtx_mode_int_int_intp_bool_false)
/* Compute the cost of X, used as an address. Never called with
invalid addresses. */
int, (rtx address, machine_mode mode, addr_space_t as, bool speed),
default_address_cost)
+/* Give a cost, in RTX Costs units, for an edge. Like BRANCH_COST, but with
+ well defined units. */
+DEFHOOK
+(max_noce_ifcvt_seq_cost,
+ "This hook returns a value in the same units as @code{TARGET_RTX_COSTS},\n\
+giving the maximum acceptable cost for a sequence generated by the RTL\n\
+if-conversion pass when conditional execution is not available.\n\
+The RTL if-conversion pass attempts to convert conditional operations\n\
+that would require a branch to a series of unconditional operations and\n\
+@code{mov@var{mode}cc} insns. This hook returns the maximum cost of the\n\
+unconditional instructions and the @code{mov@var{mode}cc} insns.\n\
+RTL if-conversion is cancelled if the cost of the converted sequence\n\
+is greater than the value returned by this hook.\n\
+\n\
+@code{e} is the edge between the basic block containing the conditional\n\
+branch to the basic block which would be executed if the condition\n\
+were true.\n\
+\n\
+The default implementation of this hook uses the\n\
+@code{max-rtl-if-conversion-[un]predictable} parameters if they are set,\n\
+and uses a multiple of @code{BRANCH_COST} otherwise.",
+unsigned int, (edge e),
+default_max_noce_ifcvt_seq_cost)
+
+/* Permit speculative instructions in delay slots during delayed-branch
+ scheduling. */
+DEFHOOK
+(no_speculation_in_delay_slots_p,
+ "This predicate controls the use of the eager delay slot filler to disallow\n\
+speculatively executed instructions being placed in delay slots. Targets\n\
+such as certain MIPS architectures possess both branches with and without\n\
+delay slots. As the eager delay slot filler can decrease performance,\n\
+disabling it is beneficial when ordinary branches are available. Use of\n\
+delay slot branches filled using the basic filler is often still desirable\n\
+as the delay slot can hide a pipeline bubble.", bool, (void),
+ hook_bool_void_false)
+
/* Return where to allocate pseudo for a given hard register initial value. */
DEFHOOK
(allocate_initial_value,
rtx, (void),
default_builtin_setjmp_frame_value)
-/* This target hook should add STRING_CST trees for any hard regs
- the port wishes to automatically clobber for an asm. */
-DEFHOOK
-(md_asm_clobbers,
- "This target hook should add to @var{clobbers} @code{STRING_CST} trees for\n\
-any hard regs the port wishes to automatically clobber for an asm.\n\
-It should return the result of the last @code{tree_cons} used to add a\n\
-clobber. The @var{outputs}, @var{inputs} and @var{clobber} lists are the\n\
-corresponding parameters to the asm and may be inspected to avoid\n\
-clobbering a register that is an input or output of the asm. You can use\n\
-@code{tree_overlaps_hard_reg_set}, declared in @file{tree.h}, to test\n\
-for overlap with regards to asm-declared registers.",
- tree, (tree outputs, tree inputs, tree clobbers),
- hook_tree_tree_tree_tree_3rd_identity)
+/* This target hook should manipulate the outputs, inputs, constraints,
+ and clobbers the port wishes for pre-processing the asm. */
+DEFHOOK
+(md_asm_adjust,
+ "This target hook may add @dfn{clobbers} to @var{clobbers} and\n\
+@var{clobbered_regs} for any hard regs the port wishes to automatically\n\
+clobber for an asm. The @var{outputs} and @var{inputs} may be inspected\n\
+to avoid clobbering a register that is already used by the asm.\n\
+\n\
+It may modify the @var{outputs}, @var{inputs}, and @var{constraints}\n\
+as necessary for other pre-processing. In this case the return value is\n\
+a sequence of insns to emit after the asm.",
+ rtx_insn *,
+ (vec<rtx>& outputs, vec<rtx>& inputs, vec<const char *>& constraints,
+ vec<rtx>& clobbers, HARD_REG_SET& clobbered_regs),
+ NULL)
/* This target hook allows the backend to specify a calling convention
in the debug information. This function actually returns an
"Perform architecture specific checking of statements gimplified\
from @code{VA_ARG_EXPR}. @var{stmt} is the statement. Returns true if\
the statement doesn't need to be checked for @code{va_list} references.",
- bool, (struct stdarg_info *ai, const_gimple stmt), NULL)
+ bool, (struct stdarg_info *ai, const gimple *stmt), NULL)
/* This target hook allows the operating system to override the DECL
that represents the external variable that contains the stack
tree, (void),
default_external_stack_protect_fail)
+/* This target hook allows the operating system to disable the default stack
+ protector runtime support. */
+DEFHOOK
+(stack_protect_runtime_enabled_p,
+ "Returns true if the target wants GCC's default stack protect runtime support,\
+ otherwise return false. The default implementation always returns true.",
+ bool, (void),
+ hook_bool_void_true)
+
DEFHOOK
(can_use_doloop_p,
"Return true if it is possible to use low-overhead loops (@code{doloop_end}\n\
to emit adjusting code, you should do it at this point.",
rtx, (tree fndecl, int incoming),
hook_rtx_tree_int_null)
+
+DEFHOOKPOD
+(omit_struct_return_reg,
+ "Normally, when a function returns a structure by memory, the address\n\
+is passed as an invisible pointer argument, but the compiler also\n\
+arranges to return the address from the function like it would a normal\n\
+pointer return value. Define this to true if that behavior is\n\
+undesirable on your target.",
+ bool, false)
+
DEFHOOK
(return_in_memory,
"This target hook should return a nonzero value to say to return the\n\
default_setup_incoming_varargs)
DEFHOOK
+(load_bounds_for_arg,
+ "This hook is used by expand pass to emit insn to load bounds of\n\
+@var{arg} passed in @var{slot}. Expand pass uses this hook in case\n\
+bounds of @var{arg} are not passed in register. If @var{slot} is a\n\
+memory, then bounds are loaded as for regular pointer loaded from\n\
+memory. If @var{slot} is not a memory then @var{slot_no} is an integer\n\
+constant holding number of the target dependent special slot which\n\
+should be used to obtain bounds. Hook returns RTX holding loaded bounds.",
+ rtx, (rtx slot, rtx arg, rtx slot_no),
+ default_load_bounds_for_arg)
+
+DEFHOOK
+(store_bounds_for_arg,
+ "This hook is used by expand pass to emit insns to store @var{bounds} of\n\
+@var{arg} passed in @var{slot}. Expand pass uses this hook in case\n\
+@var{bounds} of @var{arg} are not passed in register. If @var{slot} is a\n\
+memory, then @var{bounds} are stored as for regular pointer stored in\n\
+memory. If @var{slot} is not a memory then @var{slot_no} is an integer\n\
+constant holding number of the target dependent special slot which\n\
+should be used to store @var{bounds}.",
+ void, (rtx arg, rtx slot, rtx bounds, rtx slot_no),
+ default_store_bounds_for_arg)
+
+DEFHOOK
+(load_returned_bounds,
+ "This hook is used by expand pass to emit insn to load bounds\n\
+returned by function call in @var{slot}. Hook returns RTX holding\n\
+loaded bounds.",
+ rtx, (rtx slot),
+ default_load_returned_bounds)
+
+DEFHOOK
+(store_returned_bounds,
+ "This hook is used by expand pass to emit insn to store @var{bounds}\n\
+returned by function call into @var{slot}.",
+ void, (rtx slot, rtx bounds),
+ default_store_returned_bounds)
+
+DEFHOOK
+(setup_incoming_vararg_bounds,
+ "Use it to store bounds for anonymous register arguments stored\n\
+into the stack. Arguments meaning is similar to\n\
+@code{TARGET_SETUP_INCOMING_VARARGS}.",
+ void, (cumulative_args_t args_so_far, enum machine_mode mode, tree type,
+ int *pretend_args_size, int second_time),
+ default_setup_incoming_vararg_bounds)
+
+DEFHOOK
+(call_args,
+ "While generating RTL for a function call, this target hook is invoked once\n\
+for each argument passed to the function, either a register returned by\n\
+@code{TARGET_FUNCTION_ARG} or a memory location. It is called just\n\
+before the point where argument registers are stored. The type of the\n\
+function to be called is also passed as the second argument; it is\n\
+@code{NULL_TREE} for libcalls. The @code{TARGET_END_CALL_ARGS} hook is\n\
+invoked just after the code to copy the return reg has been emitted.\n\
+This functionality can be used to perform special setup of call argument\n\
+registers if a target needs it.\n\
+For functions without arguments, the hook is called once with @code{pc_rtx}\n\
+passed instead of an argument register.\n\
+Most ports do not need to implement anything for this hook.",
+ void, (rtx, tree),
+ hook_void_rtx_tree)
+
+DEFHOOK
+(end_call_args,
+ "This target hook is invoked while generating RTL for a function call,\n\
+just after the point where the return reg is copied into a pseudo. It\n\
+signals that all the call argument and return registers for the just\n\
+emitted call are now no longer in use.\n\
+Most ports do not need to implement anything for this hook.",
+ void, (void),
+ hook_void_void)
+
+DEFHOOK
(strict_argument_naming,
"Define this hook to return @code{true} if the location where a function\n\
argument is passed depends on whether or not it is a named argument.\n\
register in which to pass the argument, or zero to pass the argument\n\
on the stack.\n\
\n\
+The return value can be a @code{const_int} which means argument is\n\
+passed in a target specific slot with specified number. Target hooks\n\
+should be used to store or load argument in such case. See\n\
+@code{TARGET_STORE_BOUNDS_FOR_ARG} and @code{TARGET_LOAD_BOUNDS_FOR_ARG}\n\
+for more information.\n\
+\n\
The value of the expression can also be a @code{parallel} RTX@. This is\n\
used when an argument is passed in multiple locations. The mode of the\n\
@code{parallel} should be the mode of the entire argument. The\n\
bool named),
default_function_arg)
-/* Likewise, but for machines with register windows. Return the
- location where the argument will appear to the callee. */
DEFHOOK
(function_incoming_arg,
- "Define this hook if the target machine has ``register windows'', so\n\
-that the register in which a function sees an arguments is not\n\
-necessarily the same as the one in which the caller passed the\n\
-argument.\n\
+ "Define this hook if the caller and callee on the target have different\n\
+views of where arguments are passed. Also define this hook if there are\n\
+functions that are never directly called, but are invoked by the hardware\n\
+and which have nonstandard calling conventions.\n\
\n\
-For such machines, @code{TARGET_FUNCTION_ARG} computes the register in\n\
+In this case @code{TARGET_FUNCTION_ARG} computes the register in\n\
which the caller passes the value, and\n\
@code{TARGET_FUNCTION_INCOMING_ARG} should be defined in a similar\n\
fashion to tell the function being called where the arguments will\n\
arrive.\n\
\n\
+@code{TARGET_FUNCTION_INCOMING_ARG} can also return arbitrary address\n\
+computation using hard register, which can be forced into a register,\n\
+so that it can be used to pass special arguments.\n\
+\n\
If @code{TARGET_FUNCTION_INCOMING_ARG} is not defined,\n\
@code{TARGET_FUNCTION_ARG} serves both purposes.",
rtx, (cumulative_args_t ca, machine_mode mode, const_tree type,
rtx, (const_tree ret_type, const_tree fn_decl_or_type, bool outgoing),
default_function_value)
+/* Return the rtx for bounds of returned pointer. */
+DEFHOOK
+(chkp_function_value_bounds,
+ "Define this to return an RTX representing the place where a function\n\
+returns bounds for returned pointers. Arguments meaning is similar to\n\
+@code{TARGET_FUNCTION_VALUE}.",
+ rtx, (const_tree ret_type, const_tree fn_decl_or_type, bool outgoing),
+ default_chkp_function_value_bounds)
+
/* Return the rtx for the result of a libcall of mode MODE,
calling the function FN_NAME. */
DEFHOOK
bool, (void),
hook_bool_void_true)
-/* Return an rtx for the static chain for FNDECL. If INCOMING_P is true,
- then it should be for the callee; otherwise for the caller. */
+/* Return an rtx for the static chain for FNDECL_OR_TYPE. If INCOMING_P
+ is true, then it should be for the callee; otherwise for the caller. */
DEFHOOK
(static_chain,
"This hook replaces the use of @code{STATIC_CHAIN_REGNUM} et al for\n\
The variables @code{stack_pointer_rtx}, @code{frame_pointer_rtx}, and\n\
@code{arg_pointer_rtx} will have been initialized and should be used\n\
to refer to those items.",
- rtx, (const_tree fndecl, bool incoming_p),
+ rtx, (const_tree fndecl_or_type, bool incoming_p),
default_static_chain)
/* Fill in the trampoline at MEM with a call to FNDECL and a
If this hook is not defined, @var{addr} will be used for function calls.",
rtx, (rtx addr), NULL)
+DEFHOOKPOD
+(custom_function_descriptors,
+ "This hook should be defined to a power of 2 if the target will benefit\n\
+from the use of custom descriptors for nested functions instead of the\n\
+standard trampolines. Such descriptors are created at run time on the\n\
+stack and made up of data only, but they are non-standard so the generated\n\
+code must be prepared to deal with them. This hook should be defined to 0\n\
+if the target uses function descriptors for its standard calling sequence,\n\
+like for example HP-PA or IA-64. Using descriptors for nested functions\n\
+eliminates the need for trampolines that reside on the stack and require\n\
+it to be made executable.\n\
+\n\
+The value of the macro is used to parameterize the run-time identification\n\
+scheme implemented to distinguish descriptors from function addresses: it\n\
+gives the number of bytes by which their address is misaligned compared\n\
+with function addresses. The value of 1 will generally work, unless it is\n\
+already reserved by the target for another purpose, like for example on ARM.",\
+ int, -1)
+
/* Return the number of bytes of its own arguments that a function
pops on returning, or 0 if the function pops no arguments and the
caller must therefore pop them all after the function returns. */
const char *, (int op, const_tree type1, const_tree type2),
hook_constcharptr_int_const_tree_const_tree_null)
-/* Return the diagnostic message string if TYPE is not valid as a
- function parameter type, NULL otherwise. */
-DEFHOOK
-(invalid_parameter_type,
- "If defined, this macro returns the diagnostic message when it is\n\
-invalid for functions to include parameters of type @var{type},\n\
-or @code{NULL} if validity should be determined by\n\
-the front end. This is currently used only by the C and C++ front ends.",
- const char *, (const_tree type),
- hook_constcharptr_const_tree_null)
-
-/* Return the diagnostic message string if TYPE is not valid as a
- function return type, NULL otherwise. */
-DEFHOOK
-(invalid_return_type,
- "If defined, this macro returns the diagnostic message when it is\n\
-invalid for functions to have return type @var{type},\n\
-or @code{NULL} if validity should be determined by\n\
-the front end. This is currently used only by the C and C++ front ends.",
- const char *, (const_tree type),
- hook_constcharptr_const_tree_null)
-
/* If values of TYPE are promoted to some other type when used in
expressions (analogous to the integer promotions), return that type,
or NULL_TREE otherwise. */
tree, (tree type, tree expr),
hook_tree_tree_tree_null)
+/* Change pseudo allocno class calculated by IRA. */
+DEFHOOK
+(ira_change_pseudo_allocno_class,
+ "A target hook which can change allocno class for given pseudo from\n\
+ allocno and best class calculated by IRA.\n\
+ \n\
+ The default version of this target hook always returns given class.",
+ reg_class_t, (int, reg_class_t, reg_class_t),
+ default_ira_change_pseudo_allocno_class)
+
/* Return true if we use LRA instead of reload. */
DEFHOOK
(lra_p,
"A target hook which returns true if we use LRA instead of reload pass.\
- It means that LRA was ported to the target.\
\
- The default version of this target hook returns always false.",
+ The default version of this target hook returns true. New ports\
+ should use LRA, and existing ports are encouraged to convert.",
bool, (void),
default_lra_p)
reg_class_t, (reg_class_t, machine_mode),
NULL)
+/* Determine an additional allocno class. */
+DEFHOOK
+(additional_allocno_class_p,
+ "This hook should return @code{true} if given class of registers should\
+ be an allocno class in any way. Usually RA uses only one register\
+ class from all classes containing the same register set. In some\
+ complicated cases, you need to have two or more such classes as\
+ allocno ones for RA correct work. Not defining this hook is\
+ equivalent to returning @code{false} for all inputs.",
+ bool, (reg_class_t),
+ hook_bool_reg_class_t_false)
+
DEFHOOK
(cstore_mode,
"This hook defines the machine mode to use for the boolean result of\
machine_mode, (enum insn_code icode),
default_cstore_mode)
+/* This target hook allows the backend to compute the register pressure
+ classes to use. */
+DEFHOOK
+(compute_pressure_classes,
+ "A target hook which lets a backend compute the set of pressure classes to\
+ be used by those optimization passes which take register pressure into\
+ account, as opposed to letting IRA compute them. It returns the number of\
+ register classes stored in the array @var{pressure_classes}.",
+ int, (enum reg_class *pressure_classes), NULL)
+
/* True if a structure, union or array with MODE containing FIELD should
be accessed using BLKmode. */
DEFHOOK
bool, (const_tree field, machine_mode mode),
default_member_type_forces_blk)
+/* See tree-ssa-math-opts.c:divmod_candidate_p for conditions
+ that gate the divod transform. */
+DEFHOOK
+(expand_divmod_libfunc,
+ "Define this hook for enabling divmod transform if the port does not have\n\
+hardware divmod insn but defines target-specific divmod libfuncs.",
+ void, (rtx libfunc, machine_mode mode, rtx op0, rtx op1, rtx *quot, rtx *rem),
+ NULL)
+
/* Return the class for a secondary reload, and fill in extra information. */
DEFHOOK
(secondary_reload,
reg_class_t, (reg_class_t rclass),
default_preferred_rename_class)
+/* This target hook allows the backend to avoid unsafe substitution
+ during register allocation. */
+DEFHOOK
+(cannot_substitute_mem_equiv_p,
+ "A target hook which returns @code{true} if @var{subst} can't\n\
+substitute safely pseudos with equivalent memory values during\n\
+register allocation.\n\
+The default version of this target hook returns @code{false}.\n\
+On most machines, this default should be used. For generally\n\
+machines with non orthogonal register usage for addressing, such\n\
+as SH, this hook can be used to avoid excessive spilling.",
+ bool, (rtx subst),
+ hook_bool_rtx_false)
+
+/* This target hook allows the backend to legitimize base plus
+ displacement addressing. */
+DEFHOOK
+(legitimize_address_displacement,
+ "A target hook which returns @code{true} if *@var{disp} is\n\
+legitimezed to valid address displacement with subtracting *@var{offset}\n\
+at memory mode @var{mode}.\n\
+The default version of this target hook returns @code{false}.\n\
+This hook will benefit machines with limited base plus displacement\n\
+addressing.",
+ bool, (rtx *disp, rtx *offset, machine_mode mode),
+ default_legitimize_address_displacement)
+
/* This target hook allows the backend to perform additional
processing while initializing for variable expansion. */
DEFHOOK
unsigned int, (void),
default_case_values_threshold)
-/* Retutn true if a function must have and use a frame pointer. */
+/* Return true if a function must have and use a frame pointer. */
DEFHOOK
(frame_pointer_required,
"This target hook should return @code{true} if a function must have and use\n\
In certain cases, the compiler does not know how to produce valid code\n\
without a frame pointer. The compiler recognizes those cases and\n\
automatically gives the function a frame pointer regardless of what\n\
-@code{TARGET_FRAME_POINTER_REQUIRED} returns. You don't need to worry about\n\
+@code{targetm.frame_pointer_required} returns. You don't need to worry about\n\
them.\n\
\n\
In a function that does not require a frame pointer, the frame pointer\n\
from-reg with register number to-reg. */
DEFHOOK
(can_eliminate,
- "This target hook should returns @code{true} if the compiler is allowed to\n\
+ "This target hook should return @code{true} if the compiler is allowed to\n\
try to replace register number @var{from_reg} with register number\n\
-@var{to_reg}. This target hook need only be defined if @code{ELIMINABLE_REGS}\n\
-is defined, and will usually be @code{true}, since most of the cases\n\
-preventing register elimination are things that the compiler already\n\
+@var{to_reg}. This target hook will usually be @code{true}, since most of the\n\
+cases preventing register elimination are things that the compiler already\n\
knows about.\n\
\n\
Default return value is @code{true}.",
@code{fixed_regs}, @code{call_used_regs}, @code{global_regs},\n\
@code{reg_names}, and @code{reg_class_contents}, to take into account\n\
any dependence of these register sets on target flags. The first three\n\
-of these are of type @code{char []} (interpreted as Boolean vectors).\n\
+of these are of type @code{char []} (interpreted as boolean vectors).\n\
@code{global_regs} is a @code{const char *[]}, and\n\
@code{reg_class_contents} is a @code{HARD_REG_SET}. Before the macro is\n\
called, @code{fixed_regs}, @code{call_used_regs},\n\
machine_mode, (char c),
default_mode_for_suffix)
+DEFHOOK
+(excess_precision,
+ "Return a value, with the same meaning as the C99 macro\
+ @code{FLT_EVAL_METHOD} that describes which excess precision should be\
+ applied. @var{type} is either @code{EXCESS_PRECISION_TYPE_IMPLICIT},\
+ @code{EXCESS_PRECISION_TYPE_FAST}, or\
+ @code{EXCESS_PRECISION_TYPE_STANDARD}. For\
+ @code{EXCESS_PRECISION_TYPE_IMPLICIT}, the target should return which\
+ precision and range operations will be implictly evaluated in regardless\
+ of the excess precision explicitly added. For\
+ @code{EXCESS_PRECISION_TYPE_STANDARD} and\
+ @code{EXCESS_PRECISION_TYPE_FAST}, the target should return the\
+ explicit excess precision that should be added depending on the\
+ value set for @option{-fexcess-precision=@r{[}standard@r{|}fast@r{]}}.\
+ Note that unpredictable explicit excess precision does not make sense,\
+ so a target should never return @code{FLT_EVAL_METHOD_UNPREDICTABLE}\
+ when @var{type} is @code{EXCESS_PRECISION_TYPE_STANDARD} or\
+ @code{EXCESS_PRECISION_TYPE_FAST}.",
+ enum flt_eval_method, (enum excess_precision_type type),
+ default_excess_precision)
+
HOOK_VECTOR_END (c)
/* Functions specific to the C++ frontend. */
function-specific options to the @code{struct gcc_options} structure.",
void, (struct gcc_options *opts, struct cl_target_option *ptr), NULL)
+/* Function to update target-specific option information after being
+ streamed in. */
+DEFHOOK
+(post_stream_in,
+ "This hook is called to update target-specific information in the\n\
+@code{struct cl_target_option} structure after it is streamed in from\n\
+LTO bytecode.",
+ void, (struct cl_target_option *ptr), NULL)
+
/* Function to print any extra target state from the target options
structure. */
DEFHOOK
bool, (tree caller, tree callee),
default_target_can_inline_p)
+DEFHOOK
+(relayout_function,
+"This target hook fixes function @var{fndecl} after attributes are processed. Default does nothing. On ARM, the default function's alignment is updated with the attribute target.",
+ void, (tree fndecl),
+ hook_void_tree)
+
HOOK_VECTOR_END (target_option)
/* For targets that need to mark extra registers as live on entry to
modifiable by the callee. The affected registers may be mentioned explicitly\n\
in the call pattern, or included as clobbers in CALL_INSN_FUNCTION_USAGE.\n\
The default version of this hook is set to false. The purpose of this hook\n\
-is to enable the fuse-caller-save optimization.",
+is to enable the fipa-ra optimization.",
bool,
false)
bool, (tree),
hook_bool_tree_true)
+#undef HOOK_PREFIX
+#define HOOK_PREFIX "TARGET_SHRINK_WRAP_"
+HOOK_VECTOR (TARGET_SHRINK_WRAP_HOOKS, shrink_wrap)
+
+DEFHOOK
+(get_separate_components,
+ "This hook should return an @code{sbitmap} with the bits set for those\n\
+components that can be separately shrink-wrapped in the current function.\n\
+Return @code{NULL} if the current function should not get any separate\n\
+shrink-wrapping.\n\
+Don't define this hook if it would always return @code{NULL}.\n\
+If it is defined, the other hooks in this group have to be defined as well.",
+ sbitmap, (void),
+ NULL)
+
+DEFHOOK
+(components_for_bb,
+ "This hook should return an @code{sbitmap} with the bits set for those\n\
+components where either the prologue component has to be executed before\n\
+the @code{basic_block}, or the epilogue component after it, or both.",
+ sbitmap, (basic_block),
+ NULL)
+
+DEFHOOK
+(disqualify_components,
+ "This hook should clear the bits in the @var{components} bitmap for those\n\
+components in @var{edge_components} that the target cannot handle on edge\n\
+@var{e}, where @var{is_prologue} says if this is for a prologue or an\n\
+epilogue instead.",
+ void, (sbitmap components, edge e, sbitmap edge_components, bool is_prologue),
+ NULL)
+
+DEFHOOK
+(emit_prologue_components,
+ "Emit prologue insns for the components indicated by the parameter.",
+ void, (sbitmap),
+ NULL)
+
+DEFHOOK
+(emit_epilogue_components,
+ "Emit epilogue insns for the components indicated by the parameter.",
+ void, (sbitmap),
+ NULL)
+
+DEFHOOK
+(set_handled_components,
+ "Mark the components in the parameter as handled, so that the\n\
+@code{prologue} and @code{epilogue} named patterns know to ignore those\n\
+components. The target code should not hang on to the @code{sbitmap}, it\n\
+will be deleted after this call.",
+ void, (sbitmap),
+ NULL)
+
+HOOK_VECTOR_END (shrink_wrap)
+#undef HOOK_PREFIX
+#define HOOK_PREFIX "TARGET_"
+
/* Determine the type of unwind info to emit for debugging. */
DEFHOOK
(debug_unwind_info,
void, (int *code, rtx *op0, rtx *op1, bool op0_preserve_value),
default_canonicalize_comparison)
+DEFHOOK
+(min_arithmetic_precision,
+ "On some RISC architectures with 64-bit registers, the processor also\n\
+maintains 32-bit condition codes that make it possible to do real 32-bit\n\
+arithmetic, although the operations are performed on the full registers.\n\
+\n\
+On such architectures, defining this hook to 32 tells the compiler to try\n\
+using 32-bit arithmetical operations setting the condition codes instead\n\
+of doing full 64-bit arithmetic.\n\
+\n\
+More generally, define this hook on RISC architectures if you want the\n\
+compiler to try using arithmetical operations setting the condition codes\n\
+with a precision lower than the word precision.\n\
+\n\
+You need not define this hook if @code{WORD_REGISTER_OPERATIONS} is not\n\
+defined to 1.",
+ unsigned int, (void), default_min_arithmetic_precision)
+
DEFHOOKPOD
(atomic_test_and_set_trueval,
"This value should be set if the result written by\
this to be done. The default is false.",
bool, false)
-/* True if the target is allowed to reorder memory accesses unless
- synchronization is explicitly requested. */
-DEFHOOKPOD
-(relaxed_ordering,
- "If set to @code{true}, means that the target's memory model does not\n\
-guarantee that loads which do not depend on one another will access\n\
-main memory in the order of the instruction stream; if ordering is\n\
-important, an explicit memory barrier must be used. This is true of\n\
-many recent processors which implement a policy of ``relaxed,''\n\
-``weak,'' or ``release'' memory consistency, such as Alpha, PowerPC,\n\
-and ia64. The default is @code{false}.",
- bool, false)
-
/* Returns true if we should generate exception tables for use with the
ARM EABI. The effects the encoding of function exception specifications. */
DEFHOOKPOD
bool, false)
DEFHOOKPOD
-(force_at_comp_dir,
- "True if the @code{DW_AT_comp_dir} attribute should be emitted for each \
- compilation unit. This attribute is required for the darwin linker \
- to emit debug information.",
- bool, false)
-
-DEFHOOKPOD
(delay_sched2, "True if sched2 is not to be run at its normal place.\n\
This usually means it will be run as part of machine-specific reorg.",
bool, false)
HOOK_VECTOR_END (mode_switching)
+#undef HOOK_PREFIX
+#define HOOK_PREFIX "TARGET_"
+
+#define DEF_TARGET_INSN(NAME, PROTO) \
+ DEFHOOK_UNDOC (have_##NAME, "", bool, (void), false)
+#include "target-insns.def"
+#undef DEF_TARGET_INSN
+
+#define DEF_TARGET_INSN(NAME, PROTO) \
+ DEFHOOK_UNDOC (gen_##NAME, "", rtx_insn *, PROTO, NULL)
+#include "target-insns.def"
+#undef DEF_TARGET_INSN
+
+#define DEF_TARGET_INSN(NAME, PROTO) \
+ DEFHOOKPOD (code_for_##NAME, "*", enum insn_code, CODE_FOR_nothing)
+#include "target-insns.def"
+#undef DEF_TARGET_INSN
+
+DEFHOOK
+(run_target_selftests,
+ "If selftests are enabled, run any selftests for this target.",
+ void, (void),
+ NULL)
+
/* Close the 'struct gcc_target' definition. */
HOOK_VECTOR_END (C90_EMPTY_HACK)
projects / platform / upstream / gcc.git / blobdiff