OutStreamer->EmitValue(E, Size);
}
+void ARMAsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
+ if (PromotedGlobals.count(GV))
+ // The global was promoted into a constant pool. It should not be emitted.
+ return;
+ AsmPrinter::EmitGlobalVariable(GV);
+}
+
/// runOnMachineFunction - This uses the EmitInstruction()
/// method to print assembly for each instruction.
///
const Function* F = MF.getFunction();
const TargetMachine& TM = MF.getTarget();
+ // Collect all globals that had their storage promoted to a constant pool.
+ // Functions are emitted before variables, so this accumulates promoted
+ // globals from all functions in PromotedGlobals.
+ for (auto *GV : AFI->getGlobalsPromotedToConstantPool())
+ PromotedGlobals.insert(GV);
+
// Calculate this function's optimization goal.
unsigned OptimizationGoal;
if (F->hasFnAttribute(Attribute::OptimizeNone))
ARMConstantPoolValue *ACPV = static_cast<ARMConstantPoolValue*>(MCPV);
+ if (ACPV->isPromotedGlobal()) {
+ // This constant pool entry is actually a global whose storage has been
+ // promoted into the constant pool. This global may be referenced still
+ // by debug information, and due to the way AsmPrinter is set up, the debug
+ // info is immutable by the time we decide to promote globals to constant
+ // pools. Because of this, we need to ensure we emit a symbol for the global
+ // with private linkage (the default) so debug info can refer to it.
+ //
+ // However, if this global is promoted into several functions we must ensure
+ // we don't try and emit duplicate symbols!
+ auto *ACPC = cast<ARMConstantPoolConstant>(ACPV);
+ auto *GV = ACPC->getPromotedGlobal();
+ if (!EmittedPromotedGlobalLabels.count(GV)) {
+ MCSymbol *GVSym = getSymbol(GV);
+ OutStreamer->EmitLabel(GVSym);
+ EmittedPromotedGlobalLabels.insert(GV);
+ }
+ return EmitGlobalConstant(DL, ACPC->getPromotedGlobalInit());
+ }
+
MCSymbol *MCSym;
if (ACPV->isLSDA()) {
MCSym = getCurExceptionSym();
/// -1 if uninitialized, 0 if conflicting goals
int OptimizationGoals;
+ /// List of globals that have had their storage promoted to a constant
+ /// pool. This lives between calls to runOnMachineFunction and collects
+ /// data from every MachineFunction. It is used during doFinalization
+ /// when all non-function globals are emitted.
+ SmallPtrSet<const GlobalVariable*,2> PromotedGlobals;
+ /// Set of globals in PromotedGlobals that we've emitted labels for.
+ /// We need to emit labels even for promoted globals so that DWARF
+ /// debug info can link properly.
+ SmallPtrSet<const GlobalVariable*,2> EmittedPromotedGlobalLabels;
+
public:
explicit ARMAsmPrinter(TargetMachine &TM,
std::unique_ptr<MCStreamer> Streamer);
void EmitStartOfAsmFile(Module &M) override;
void EmitEndOfAsmFile(Module &M) override;
void EmitXXStructor(const DataLayout &DL, const Constant *CV) override;
-
+ void EmitGlobalVariable(const GlobalVariable *GV) override;
+
// lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
case ARM::LDRi12:
case ARM::LDRcp:
case ARM::t2LDRpci:
+ case ARM::t2LDRHpci:
Bits = 12; // +-offset_12
NegOk = true;
break;
Scale = 4; // +-(offset_8*4)
NegOk = true;
break;
+
+ case ARM::tLDRHi:
+ Bits = 5;
+ Scale = 2; // +(offset_5*2)
+ break;
}
// Remember that this is a user of a CP entry.
AddCurrentAddress),
CVal(C) {}
+ARMConstantPoolConstant::ARMConstantPoolConstant(const GlobalVariable *GV,
+ const Constant *C)
+ : ARMConstantPoolValue((Type *)C->getType(), 0, ARMCP::CPPromotedGlobal, 0,
+ ARMCP::no_modifier, false),
+ CVal(C), GVar(GV) {}
+
ARMConstantPoolConstant *
ARMConstantPoolConstant::Create(const Constant *C, unsigned ID) {
return new ARMConstantPoolConstant(C, ID, ARMCP::CPValue, 0,
}
ARMConstantPoolConstant *
+ARMConstantPoolConstant::Create(const GlobalVariable *GVar,
+ const Constant *Initializer) {
+ return new ARMConstantPoolConstant(GVar, Initializer);
+}
+
+ARMConstantPoolConstant *
ARMConstantPoolConstant::Create(const GlobalValue *GV,
ARMCP::ARMCPModifier Modifier) {
return new ARMConstantPoolConstant((Type*)Type::getInt32Ty(GV->getContext()),
class BlockAddress;
class Constant;
class GlobalValue;
+class GlobalVariable;
class LLVMContext;
class MachineBasicBlock;
CPExtSymbol,
CPBlockAddress,
CPLSDA,
- CPMachineBasicBlock
+ CPMachineBasicBlock,
+ CPPromotedGlobal
};
enum ARMCPModifier {
bool isBlockAddress() const { return Kind == ARMCP::CPBlockAddress; }
bool isLSDA() const { return Kind == ARMCP::CPLSDA; }
bool isMachineBasicBlock() const{ return Kind == ARMCP::CPMachineBasicBlock; }
-
+ bool isPromotedGlobal() const{ return Kind == ARMCP::CPPromotedGlobal; }
+
int getExistingMachineCPValue(MachineConstantPool *CP,
unsigned Alignment) override;
/// Functions, and BlockAddresses.
class ARMConstantPoolConstant : public ARMConstantPoolValue {
const Constant *CVal; // Constant being loaded.
+ const GlobalVariable *GVar = nullptr;
ARMConstantPoolConstant(const Constant *C,
unsigned ID,
unsigned char PCAdj,
ARMCP::ARMCPModifier Modifier,
bool AddCurrentAddress);
+ ARMConstantPoolConstant(const GlobalVariable *GV, const Constant *Init);
public:
static ARMConstantPoolConstant *Create(const Constant *C, unsigned ID);
static ARMConstantPoolConstant *Create(const GlobalValue *GV,
ARMCP::ARMCPModifier Modifier);
+ static ARMConstantPoolConstant *Create(const GlobalVariable *GV,
+ const Constant *Initializer);
static ARMConstantPoolConstant *Create(const Constant *C, unsigned ID,
ARMCP::ARMCPKind Kind,
unsigned char PCAdj);
const GlobalValue *getGV() const;
const BlockAddress *getBlockAddress() const;
+ const GlobalVariable *getPromotedGlobal() const {
+ return dyn_cast_or_null<GlobalVariable>(GVar);
+ }
+ const Constant *getPromotedGlobalInit() const {
+ return CVal;
+ }
int getExistingMachineCPValue(MachineConstantPool *CP,
unsigned Alignment) override;
void print(raw_ostream &O) const override;
static bool classof(const ARMConstantPoolValue *APV) {
- return APV->isGlobalValue() || APV->isBlockAddress() || APV->isLSDA();
+ return APV->isGlobalValue() || APV->isBlockAddress() || APV->isLSDA() ||
+ APV->isPromotedGlobal();
}
bool equals(const ARMConstantPoolConstant *A) const {
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
+#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instruction.h"
STATISTIC(NumTailCalls, "Number of tail calls");
STATISTIC(NumMovwMovt, "Number of GAs materialized with movw + movt");
STATISTIC(NumLoopByVals, "Number of loops generated for byval arguments");
+STATISTIC(NumConstpoolPromoted,
+ "Number of constants with their storage promoted into constant pools");
static cl::opt<bool>
ARMInterworking("arm-interworking", cl::Hidden,
cl::desc("Enable / disable ARM interworking (for debugging only)"),
cl::init(true));
+static cl::opt<bool> EnableConstpoolPromotion(
+ "arm-promote-constant", cl::Hidden,
+ cl::desc("Enable / disable promotion of unnamed_addr constants into "
+ "constant pools"),
+ cl::init(true));
+static cl::opt<unsigned> ConstpoolPromotionMaxSize(
+ "arm-promote-constant-max-size", cl::Hidden,
+ cl::desc("Maximum size of constant to promote into a constant pool"),
+ cl::init(64));
+static cl::opt<unsigned> ConstpoolPromotionMaxTotal(
+ "arm-promote-constant-max-total", cl::Hidden,
+ cl::desc("Maximum size of ALL constants to promote into a constant pool"),
+ cl::init(128));
+
namespace {
class ARMCCState : public CCState {
public:
llvm_unreachable("bogus TLS model");
}
+/// Return true if all users of V are within function F, looking through
+/// ConstantExprs.
+static bool allUsersAreInFunction(const Value *V, const Function *F) {
+ SmallVector<const User*,4> Worklist;
+ for (auto *U : V->users())
+ Worklist.push_back(U);
+ while (!Worklist.empty()) {
+ auto *U = Worklist.pop_back_val();
+ if (isa<ConstantExpr>(U)) {
+ for (auto *UU : U->users())
+ Worklist.push_back(UU);
+ continue;
+ }
+
+ auto *I = dyn_cast<Instruction>(U);
+ if (!I || I->getParent()->getParent() != F)
+ return false;
+ }
+ return true;
+}
+
+/// Return true if all users of V are within some (any) function, looking through
+/// ConstantExprs. In other words, are there any global constant users?
+static bool allUsersAreInFunctions(const Value *V) {
+ SmallVector<const User*,4> Worklist;
+ for (auto *U : V->users())
+ Worklist.push_back(U);
+ while (!Worklist.empty()) {
+ auto *U = Worklist.pop_back_val();
+ if (isa<ConstantExpr>(U)) {
+ for (auto *UU : U->users())
+ Worklist.push_back(UU);
+ continue;
+ }
+
+ if (!isa<Instruction>(U))
+ return false;
+ }
+ return true;
+}
+
+// Return true if T is an integer, float or an array/vector of either.
+static bool isSimpleType(Type *T) {
+ if (T->isIntegerTy() || T->isFloatingPointTy())
+ return true;
+ Type *SubT = nullptr;
+ if (T->isArrayTy())
+ SubT = T->getArrayElementType();
+ else if (T->isVectorTy())
+ SubT = T->getVectorElementType();
+ else
+ return false;
+ return SubT->isIntegerTy() || SubT->isFloatingPointTy();
+}
+
+static SDValue promoteToConstantPool(const GlobalValue *GV, SelectionDAG &DAG,
+ EVT PtrVT, SDLoc dl) {
+ // If we're creating a pool entry for a constant global with unnamed address,
+ // and the global is small enough, we can emit it inline into the constant pool
+ // to save ourselves an indirection.
+ //
+ // This is a win if the constant is only used in one function (so it doesn't
+ // need to be duplicated) or duplicating the constant wouldn't increase code
+ // size (implying the constant is no larger than 4 bytes).
+ const Function *F = DAG.getMachineFunction().getFunction();
+
+ // We rely on this decision to inline being idemopotent and unrelated to the
+ // use-site. We know that if we inline a variable at one use site, we'll
+ // inline it elsewhere too (and reuse the constant pool entry). Fast-isel
+ // doesn't know about this optimization, so bail out if it's enabled else
+ // we could decide to inline here (and thus never emit the GV) but require
+ // the GV from fast-isel generated code.
+ if (!EnableConstpoolPromotion ||
+ DAG.getMachineFunction().getTarget().Options.EnableFastISel)
+ return SDValue();
+
+ auto *GVar = dyn_cast<GlobalVariable>(GV);
+ if (!GVar || !GVar->hasInitializer() ||
+ !GVar->isConstant() || !GVar->hasGlobalUnnamedAddr() ||
+ !GVar->hasLocalLinkage())
+ return SDValue();
+
+ // Ensure that we don't try and inline any type that contains pointers. If
+ // we inline a value that contains relocations, we move the relocations from
+ // .data to .text which is not ideal.
+ auto *Init = GVar->getInitializer();
+ if (!isSimpleType(Init->getType()))
+ return SDValue();
+
+ // The constant islands pass can only really deal with alignment requests
+ // <= 4 bytes and cannot pad constants itself. Therefore we cannot promote
+ // any type wanting greater alignment requirements than 4 bytes. We also
+ // can only promote constants that are multiples of 4 bytes in size or
+ // are paddable to a multiple of 4. Currently we only try and pad constants
+ // that are strings for simplicity.
+ auto *CDAInit = dyn_cast<ConstantDataArray>(Init);
+ unsigned Size = DAG.getDataLayout().getTypeAllocSize(Init->getType());
+ unsigned Align = DAG.getDataLayout().getABITypeAlignment(Init->getType());
+ unsigned RequiredPadding = 4 - (Size % 4);
+ bool PaddingPossible =
+ RequiredPadding == 4 || (CDAInit && CDAInit->isString());
+ if (!PaddingPossible || Align > 4 || Size > ConstpoolPromotionMaxSize)
+ return SDValue();
+
+ unsigned PaddedSize = Size + ((RequiredPadding == 4) ? 0 : RequiredPadding);
+ MachineFunction &MF = DAG.getMachineFunction();
+ ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
+
+ // We can't bloat the constant pool too much, else the ConstantIslands pass
+ // may fail to converge. If we haven't promoted this global yet (it may have
+ // multiple uses), and promoting it would increase the constant pool size (Sz
+ // > 4), ensure we have space to do so up to MaxTotal.
+ if (!AFI->getGlobalsPromotedToConstantPool().count(GVar) && Size > 4)
+ if (AFI->getPromotedConstpoolIncrease() + PaddedSize - 4 >=
+ ConstpoolPromotionMaxTotal)
+ return SDValue();
+
+ // This is only valid if all users are in a single function OR it has users
+ // in multiple functions but it no larger than a pointer. We also check if
+ // GVar has constant (non-ConstantExpr) users. If so, it essentially has its
+ // address taken.
+ if (!allUsersAreInFunction(GVar, F) &&
+ !(Size <= 4 && allUsersAreInFunctions(GVar)))
+ return SDValue();
+
+ // We're going to inline this global. Pad it out if needed.
+ if (RequiredPadding != 4) {
+ StringRef S = CDAInit->getAsString();
+
+ SmallVector<uint8_t,16> V(S.size());
+ std::copy(S.bytes_begin(), S.bytes_end(), V.begin());
+ while (RequiredPadding--)
+ V.push_back(0);
+ Init = ConstantDataArray::get(*DAG.getContext(), V);
+ }
+
+ auto CPVal = ARMConstantPoolConstant::Create(GVar, Init);
+ SDValue CPAddr =
+ DAG.getTargetConstantPool(CPVal, PtrVT, /*Align=*/4);
+ if (!AFI->getGlobalsPromotedToConstantPool().count(GVar)) {
+ AFI->markGlobalAsPromotedToConstantPool(GVar);
+ AFI->setPromotedConstpoolIncrease(AFI->getPromotedConstpoolIncrease() +
+ PaddedSize - 4);
+ }
+ ++NumConstpoolPromoted;
+ return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
+}
+
SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
SelectionDAG &DAG) const {
EVT PtrVT = getPointerTy(DAG.getDataLayout());
bool IsRO =
(isa<GlobalVariable>(GV) && cast<GlobalVariable>(GV)->isConstant()) ||
isa<Function>(GV);
+
+ if (TM.shouldAssumeDSOLocal(*GV->getParent(), GV))
+ if (SDValue V = promoteToConstantPool(GV, DAG, PtrVT, dl))
+ return V;
+
if (isPositionIndependent()) {
bool UseGOT_PREL = !TM.shouldAssumeDSOLocal(*GV->getParent(), GV);
FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
PICLabelUId(0), VarArgsFrameIndex(0), HasITBlocks(false),
- ArgumentStackSize(0), IsSplitCSR(false) {}
+ ArgumentStackSize(0), IsSplitCSR(false), PromotedGlobalsIncrease(0) {}
/// copies.
bool IsSplitCSR;
+ /// Globals that have had their storage promoted into the constant pool.
+ SmallPtrSet<const GlobalVariable*,2> PromotedGlobals;
+
+ /// The amount the literal pool has been increasedby due to promoted globals.
+ int PromotedGlobalsIncrease;
+
public:
ARMFunctionInfo() :
isThumb(false),
FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
GPRCS1Size(0), GPRCS2Size(0), DPRCSAlignGapSize(0), DPRCSSize(0),
NumAlignedDPRCS2Regs(0), PICLabelUId(0),
- VarArgsFrameIndex(0), HasITBlocks(false), IsSplitCSR(false) {}
+ VarArgsFrameIndex(0), HasITBlocks(false), IsSplitCSR(false),
+ PromotedGlobalsIncrease(0) {}
explicit ARMFunctionInfo(MachineFunction &MF);
}
return It;
}
+
+ /// Indicate to the backend that \c GV has had its storage changed to inside
+ /// a constant pool. This means it no longer needs to be emitted as a
+ /// global variable.
+ void markGlobalAsPromotedToConstantPool(const GlobalVariable *GV) {
+ PromotedGlobals.insert(GV);
+ }
+ SmallPtrSet<const GlobalVariable*, 2>& getGlobalsPromotedToConstantPool() {
+ return PromotedGlobals;
+ }
+ int getPromotedConstpoolIncrease() const {
+ return PromotedGlobalsIncrease;
+ }
+ void setPromotedConstpoolIncrease(int Sz) {
+ PromotedGlobalsIncrease = Sz;
+ }
};
} // End llvm namespace
--- /dev/null
+; RUN: llc -relocation-model=static < %s | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+target triple = "thumbv7m--linux-gnu"
+
+@.str = private unnamed_addr constant [4 x i8] c"abc\00", align 1
+
+; CHECK-LABEL: fn1
+; CHECK: .str:
+define arm_aapcscc i8* @fn1() local_unnamed_addr #0 !dbg !8 {
+entry:
+ ret i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), !dbg !14
+}
+
+; CHECK-LABEL: fn2
+; CHECK-NOT: .str:
+define arm_aapcscc i8* @fn2() local_unnamed_addr #0 !dbg !15 {
+entry:
+ ret i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 1), !dbg !16
+}
+
+attributes #0 = { minsize norecurse nounwind optsize readnone "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="cortex-m3" "target-features"="+hwdiv,+soft-float,-crypto,-neon" "unsafe-fp-math"="false" "use-soft-float"="true" }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4, !5, !6}
+!llvm.ident = !{!7}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (http://llvm.org/git/clang.git 075a2bc2570dfcbb6d6aed6c836e4c62b37afea6)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
+!1 = !DIFile(filename: "/Users/jammol01/Code/test.c", directory: "/Users/jammol01/Code/llvm-git/build")
+!2 = !{}
+!3 = !{i32 2, !"Dwarf Version", i32 4}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!5 = !{i32 1, !"wchar_size", i32 4}
+!6 = !{i32 1, !"min_enum_size", i32 4}
+!7 = !{!"clang version 3.9.0 (http://llvm.org/git/clang.git 075a2bc2570dfcbb6d6aed6c836e4c62b37afea6)"}
+!8 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0, variables: !2)
+!9 = !DISubroutineType(types: !10)
+!10 = !{!11}
+!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 32, align: 32)
+!12 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !13)
+!13 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_unsigned_char)
+!14 = !DILocation(line: 2, column: 5, scope: !8)
+!15 = distinct !DISubprogram(name: "fn2", scope: !1, file: !1, line: 4, type: !9, isLocal: false, isDefinition: true, scopeLine: 4, isOptimized: true, unit: !0, variables: !2)
+!16 = !DILocation(line: 5, column: 5, scope: !15)
--- /dev/null
+; RUN: llc -relocation-model=static < %s | FileCheck %s
+; RUN: llc -relocation-model=pic < %s | FileCheck %s
+; RUN: llc -relocation-model=ropi < %s | FileCheck %s
+; RUN: llc -relocation-model=rwpi < %s | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
+target triple = "armv7--linux-gnueabihf"
+
+@.str = private unnamed_addr constant [2 x i8] c"s\00", align 1
+@.str1 = private unnamed_addr constant [69 x i8] c"this string is far too long to fit in a literal pool by far and away\00", align 1
+@.str2 = private unnamed_addr constant [27 x i8] c"this string is just right!\00", align 1
+@.str3 = private unnamed_addr constant [26 x i8] c"this string is used twice\00", align 1
+@.str4 = private unnamed_addr constant [29 x i8] c"same string in two functions\00", align 1
+@.arr1 = private unnamed_addr constant [2 x i16] [i16 3, i16 4], align 2
+@.arr2 = private unnamed_addr constant [2 x i16] [i16 7, i16 8], align 2
+@.arr3 = private unnamed_addr constant [2 x i16*] [i16* null, i16* null], align 4
+@.ptr = private unnamed_addr constant [2 x i16*] [i16* getelementptr inbounds ([2 x i16], [2 x i16]* @.arr2, i32 0, i32 0), i16* null], align 2
+
+; CHECK-LABEL: @test1
+; CHECK: adr r0, [[x:.*]]
+; CHECK: [[x]]:
+; CHECK: .asciz "s\000\000"
+define void @test1() #0 {
+ tail call void @a(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i32 0, i32 0)) #2
+ ret void
+}
+
+declare void @a(i8*) #1
+
+; CHECK-LABEL: @test2
+; CHECK-NOT: .asci
+; CHECK: .fnend
+define void @test2() #0 {
+ tail call void @a(i8* getelementptr inbounds ([69 x i8], [69 x i8]* @.str1, i32 0, i32 0)) #2
+ ret void
+}
+
+; CHECK-LABEL: @test3
+; CHECK: adr r0, [[x:.*]]
+; CHECK: [[x]]:
+; CHECK: .asciz "this string is just right!\000"
+define void @test3() #0 {
+ tail call void @a(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str2, i32 0, i32 0)) #2
+ ret void
+}
+
+
+; CHECK-LABEL: @test4
+; CHECK: adr r{{.*}}, [[x:.*]]
+; CHECK: [[x]]:
+; CHECK: .asciz "this string is used twice\000\000"
+define void @test4() #0 {
+ tail call void @a(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str3, i32 0, i32 0)) #2
+ tail call void @a(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str3, i32 0, i32 0)) #2
+ ret void
+}
+
+; CHECK-LABEL: @test5a
+; CHECK-NOT: adr
+define void @test5a() #0 {
+ tail call void @a(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str4, i32 0, i32 0)) #2
+ ret void
+}
+
+define void @test5b() #0 {
+ tail call void @b(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str4, i32 0, i32 0)) #2
+ ret void
+}
+
+; CHECK-LABEL: @test6a
+; CHECK: adr r0, [[x:.*]]
+; CHECK: [[x]]:
+; CHECK: .short 3
+; CHECK: .short 4
+define void @test6a() #0 {
+ tail call void @c(i16* getelementptr inbounds ([2 x i16], [2 x i16]* @.arr1, i32 0, i32 0)) #2
+ ret void
+}
+
+; CHECK-LABEL: @test6b
+; CHECK: adr r0, [[x:.*]]
+; CHECK: [[x]]:
+; CHECK: .short 3
+; CHECK: .short 4
+define void @test6b() #0 {
+ tail call void @c(i16* getelementptr inbounds ([2 x i16], [2 x i16]* @.arr1, i32 0, i32 0)) #2
+ ret void
+}
+
+; This shouldn't be promoted, as the string is used by another global.
+; CHECK-LABEL: @test7
+; CHECK-NOT: adr
+define void @test7() #0 {
+ tail call void @c(i16* getelementptr inbounds ([2 x i16], [2 x i16]* @.arr2, i32 0, i32 0)) #2
+ ret void
+}
+
+; This shouldn't be promoted, because the array contains pointers.
+; CHECK-LABEL: @test8
+; CHECK-NOT: .zero
+; CHECK: .fnend
+define void @test8() #0 {
+ %a = load i16*, i16** getelementptr inbounds ([2 x i16*], [2 x i16*]* @.arr3, i32 0, i32 0)
+ tail call void @c(i16* %a) #2
+ ret void
+}
+
+@fn1.a = private unnamed_addr constant [4 x i16] [i16 4, i16 0, i16 0, i16 0], align 2
+@fn2.a = private unnamed_addr constant [8 x i8] [i8 4, i8 0, i8 0, i8 0, i8 23, i8 0, i8 6, i8 0], align 1
+
+; Just check these don't crash.
+define void @fn1() "target-features"="+strict-align" {
+entry:
+ %a = alloca [4 x i16], align 2
+ %0 = bitcast [4 x i16]* %a to i8*
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* bitcast ([4 x i16]* @fn1.a to i8*), i32 8, i32 2, i1 false)
+ ret void
+}
+
+define void @fn2() "target-features"="+strict-align" {
+entry:
+ %a = alloca [8 x i8], align 2
+ %0 = bitcast [8 x i8]* %a to i8*
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* bitcast ([8 x i8]* @fn2.a to i8*), i32 16, i32 1, i1 false)
+ ret void
+}
+
+declare void @b(i8*) #1
+declare void @c(i16*) #1
+declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture writeonly, i8* nocapture readonly, i32, i32, i1)
+
+attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { nounwind }
+
+!llvm.module.flags = !{!0, !1}
+!llvm.ident = !{!2}
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{i32 1, !"min_enum_size", i32 4}
+!2 = !{!"Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)"}
projects / platform / upstream / llvm.git / commitdiff