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reland [IR] make -stack-alignment= into a module attr
Relands commit 433c8d950cb3a1fa0977355ce0367e8c763a3f13 with fixes for MIPS. Similar to D102742, specifying the stack alignment via CodegenOpts means that this flag gets dropped during LTO, unless the command line is re-specified as a plugin opt. Instead, encode this information as a module level attribute so that we don't have to expose this llvm internal flag when linking the Linux kernel with LTO. Looks like external dependencies might need a fix: * https://github.com/llvm-hs/llvm-hs/issues/345 * https://github.com/halide/Halide/issues/6079 Link: https://github.com/ClangBuiltLinux/linux/issues/1377 Reviewed By: tejohnson Differential Revision: https://reviews.llvm.org/D103048
This commit is contained in:
Nick Desaulniers
parent
521d48da10
commit
42052632ff
@ -909,6 +909,10 @@ public:
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int getStackProtectorGuardOffset() const;
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void setStackProtectorGuardOffset(int Offset);
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/// Get/set the stack alignment overridden from the default.
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unsigned getOverrideStackAlignment() const;
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void setOverrideStackAlignment(unsigned Align);
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/// @name Utility functions for querying and setting the build SDK version
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/// @{
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@ -201,9 +201,6 @@ namespace llvm {
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/// as their parent function, etc.), using an alternate ABI if necessary.
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unsigned GuaranteedTailCallOpt : 1;
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/// StackAlignmentOverride - Override default stack alignment for target.
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unsigned StackAlignmentOverride = 0;
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/// StackSymbolOrdering - When true, this will allow CodeGen to order
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/// the local stack symbols (for code size, code locality, or any other
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/// heuristics). When false, the local symbols are left in whatever order
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@ -69,7 +69,6 @@ CGOPT(bool, DontPlaceZerosInBSS)
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CGOPT(bool, EnableGuaranteedTailCallOpt)
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CGOPT(bool, DisableTailCalls)
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CGOPT(bool, StackSymbolOrdering)
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CGOPT(unsigned, OverrideStackAlignment)
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CGOPT(bool, StackRealign)
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CGOPT(std::string, TrapFuncName)
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CGOPT(bool, UseCtors)
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@ -305,11 +304,6 @@ codegen::RegisterCodeGenFlags::RegisterCodeGenFlags() {
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cl::init(true));
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CGBINDOPT(StackSymbolOrdering);
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static cl::opt<unsigned> OverrideStackAlignment(
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"stack-alignment", cl::desc("Override default stack alignment"),
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cl::init(0));
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CGBINDOPT(OverrideStackAlignment);
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static cl::opt<bool> StackRealign(
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"stackrealign",
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cl::desc("Force align the stack to the minimum alignment"),
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@ -508,7 +502,6 @@ codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) {
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Options.EnableAIXExtendedAltivecABI = getEnableAIXExtendedAltivecABI();
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Options.NoZerosInBSS = getDontPlaceZerosInBSS();
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Options.GuaranteedTailCallOpt = getEnableGuaranteedTailCallOpt();
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Options.StackAlignmentOverride = getOverrideStackAlignment();
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Options.StackSymbolOrdering = getStackSymbolOrdering();
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Options.UseInitArray = !getUseCtors();
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Options.RelaxELFRelocations = getRelaxELFRelocations();
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@ -721,6 +721,17 @@ void Module::setStackProtectorGuardOffset(int Offset) {
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addModuleFlag(ModFlagBehavior::Error, "stack-protector-guard-offset", Offset);
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}
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unsigned Module::getOverrideStackAlignment() const {
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Metadata *MD = getModuleFlag("override-stack-alignment");
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if (auto *CI = mdconst::dyn_extract_or_null<ConstantInt>(MD))
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return CI->getZExtValue();
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return 0;
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}
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void Module::setOverrideStackAlignment(unsigned Align) {
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addModuleFlag(ModFlagBehavior::Error, "override-stack-alignment", Align);
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}
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void Module::setSDKVersion(const VersionTuple &V) {
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SmallVector<unsigned, 3> Entries;
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Entries.push_back(V.getMajor());
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@ -588,8 +588,11 @@ bool MipsCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
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}
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unsigned NextStackOffset = CCInfo.getNextStackOffset();
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unsigned StackAlignment = F.getParent()->getOverrideStackAlignment();
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if (!StackAlignment) {
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const TargetFrameLowering *TFL = MF.getSubtarget().getFrameLowering();
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unsigned StackAlignment = TFL->getStackAlignment();
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StackAlignment = TFL->getStackAlignment();
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}
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NextStackOffset = alignTo(NextStackOffset, StackAlignment);
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CallSeqStart.addImm(NextStackOffset).addImm(0);
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@ -120,15 +120,11 @@ MipsTargetMachine::MipsTargetMachine(const Target &T, const Triple &TT,
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getEffectiveCodeModel(CM, CodeModel::Small), OL),
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isLittle(isLittle), TLOF(std::make_unique<MipsTargetObjectFile>()),
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ABI(MipsABIInfo::computeTargetABI(TT, CPU, Options.MCOptions)),
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Subtarget(nullptr),
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DefaultSubtarget(TT, CPU, FS, isLittle, *this,
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MaybeAlign(Options.StackAlignmentOverride)),
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Subtarget(nullptr), DefaultSubtarget(TT, CPU, FS, isLittle, *this, None),
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NoMips16Subtarget(TT, CPU, FS.empty() ? "-mips16" : FS.str() + ",-mips16",
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isLittle, *this,
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MaybeAlign(Options.StackAlignmentOverride)),
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isLittle, *this, None),
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Mips16Subtarget(TT, CPU, FS.empty() ? "+mips16" : FS.str() + ",+mips16",
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isLittle, *this,
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MaybeAlign(Options.StackAlignmentOverride)) {
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isLittle, *this, None) {
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Subtarget = &DefaultSubtarget;
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initAsmInfo();
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@ -197,7 +193,7 @@ MipsTargetMachine::getSubtargetImpl(const Function &F) const {
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resetTargetOptions(F);
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I = std::make_unique<MipsSubtarget>(
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TargetTriple, CPU, FS, isLittle, *this,
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MaybeAlign(Options.StackAlignmentOverride));
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MaybeAlign(F.getParent()->getOverrideStackAlignment()));
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}
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return I.get();
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}
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@ -314,8 +314,8 @@ X86TargetMachine::getSubtargetImpl(const Function &F) const {
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resetTargetOptions(F);
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I = std::make_unique<X86Subtarget>(
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TargetTriple, CPU, TuneCPU, FS, *this,
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MaybeAlign(Options.StackAlignmentOverride), PreferVectorWidthOverride,
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RequiredVectorWidth);
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MaybeAlign(F.getParent()->getOverrideStackAlignment()),
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PreferVectorWidthOverride, RequiredVectorWidth);
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}
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return I.get();
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}
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@ -1,7 +1,7 @@
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; Check that stack alignment can be forced. Individual targets should test their
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; specific implementation details.
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; RUN: llc < %s -stackrealign -stack-alignment=32 | FileCheck %s
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; RUN: llc < %s -stackrealign | FileCheck %s
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; CHECK-LABEL: @f
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; CHECK-LABEL: @g
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@ -25,3 +25,6 @@ if.then:
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}
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declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i1) nounwind
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"override-stack-alignment", i32 32}
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@ -1,11 +1,14 @@
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; RUN: llc -march=mipsel < %s | FileCheck %s -check-prefix=32
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; RUN: llc -march=mipsel -stack-alignment=32 < %s | FileCheck %s -check-prefix=A32-32
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; RUN: llc -march=mipsel -mattr=+fp64,+mips32r2 < %s | FileCheck %s -check-prefix=32
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; RUN: llc -march=mips64el -mcpu=mips3 < %s | FileCheck %s -check-prefix=64
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; RUN: llc -march=mips64el -mcpu=mips4 < %s | FileCheck %s -check-prefix=64
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; RUN: llc -march=mips64el -mcpu=mips64 < %s | FileCheck %s -check-prefix=64
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; RUN: llc -march=mips64el -mcpu=mips64 -stack-alignment=32 < %s | FileCheck %s -check-prefix=A32-64
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; RUN: split-file %s %t
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; RUN: cat %t/main.ll %t/_32.ll > %t/32.ll
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; RUN: llc -march=mipsel < %t/main.ll | FileCheck %s -check-prefix=32
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; RUN: llc -march=mipsel < %t/32.ll | FileCheck %s -check-prefix=A32-32
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; RUN: llc -march=mipsel -mattr=+fp64,+mips32r2 < %t/main.ll | FileCheck %s -check-prefix=32
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; RUN: llc -march=mips64el -mcpu=mips3 < %t/main.ll | FileCheck %s -check-prefix=64
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; RUN: llc -march=mips64el -mcpu=mips4 < %t/main.ll | FileCheck %s -check-prefix=64
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; RUN: llc -march=mips64el -mcpu=mips64 < %t/main.ll | FileCheck %s -check-prefix=64
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; RUN: llc -march=mips64el -mcpu=mips64 < %t/32.ll | FileCheck %s -check-prefix=A32-64
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;--- main.ll
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; 32: addiu $sp, $sp, -8
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; 64: daddiu $sp, $sp, -16
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; A32-32: addiu $sp, $sp, -32
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@ -17,3 +20,6 @@ entry:
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}
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attributes #0 = { "frame-pointer"="all" }
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;--- _32.ll
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"override-stack-alignment", i32 32}
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@ -1,7 +1,7 @@
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; RUN: llc -mtriple=x86_64-apple-macosx -mattr=+cx16 -x86-use-base-pointer=true -stackrealign -stack-alignment=32 %s -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE --check-prefix=USE_BASE_64 %s
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; RUN: llc -mtriple=x86_64-apple-macosx -mattr=+cx16 -x86-use-base-pointer=false -stackrealign -stack-alignment=32 %s -o - | FileCheck --check-prefix=CHECK --check-prefix=DONT_USE_BASE %s
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; RUN: llc -mtriple=x86_64-linux-gnux32 -mattr=+cx16 -x86-use-base-pointer=true -stackrealign -stack-alignment=32 %s -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE --check-prefix=USE_BASE_32 %s
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; RUN: llc -mtriple=x86_64-linux-gnux32 -mattr=+cx16 -x86-use-base-pointer=false -stackrealign -stack-alignment=32 %s -o - | FileCheck --check-prefix=CHECK --check-prefix=DONT_USE_BASE %s
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; RUN: llc -mtriple=x86_64-apple-macosx -mattr=+cx16 -x86-use-base-pointer=true -stackrealign %s -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE --check-prefix=USE_BASE_64 %s
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; RUN: llc -mtriple=x86_64-apple-macosx -mattr=+cx16 -x86-use-base-pointer=false -stackrealign %s -o - | FileCheck --check-prefix=CHECK --check-prefix=DONT_USE_BASE %s
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; RUN: llc -mtriple=x86_64-linux-gnux32 -mattr=+cx16 -x86-use-base-pointer=true -stackrealign %s -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE --check-prefix=USE_BASE_32 %s
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; RUN: llc -mtriple=x86_64-linux-gnux32 -mattr=+cx16 -x86-use-base-pointer=false -stackrealign %s -o - | FileCheck --check-prefix=CHECK --check-prefix=DONT_USE_BASE %s
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; This function uses dynamic allocated stack to force the use
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; of a frame pointer.
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@ -49,3 +49,5 @@ tail call void asm sideeffect "nop", "~{rax},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},
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store i32 %n, i32* %idx
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ret i1 %res
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"override-stack-alignment", i32 32}
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@ -1,7 +1,11 @@
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; RUN: llc -mtriple=x86_64-pc-linux-gnu -mattr=+mwaitx -x86-use-base-pointer=true -stackrealign -stack-alignment=32 %s -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE_64 %s
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; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -mattr=+mwaitx -x86-use-base-pointer=true -stackrealign -stack-alignment=32 %s -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE_32 %s
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; RUN: llc -mtriple=x86_64-pc-linux-gnu -mattr=+mwaitx -x86-use-base-pointer=true %s -o - | FileCheck --check-prefix=CHECK --check-prefix=NO_BASE_64 %s
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; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -mattr=+mwaitx -x86-use-base-pointer=true %s -o - | FileCheck --check-prefix=CHECK --check-prefix=NO_BASE_32 %s
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; RUN: split-file %s %t
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; RUN: cat %t/main.ll %t/_align32.ll > %t/align32.ll
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; RUN: llc -mtriple=x86_64-pc-linux-gnu -mattr=+mwaitx -x86-use-base-pointer=true -stackrealign %t/align32.ll -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE_64 %s
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; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -mattr=+mwaitx -x86-use-base-pointer=true -stackrealign %t/align32.ll -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE_32 %s
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; RUN: llc -mtriple=x86_64-pc-linux-gnu -mattr=+mwaitx -x86-use-base-pointer=true %t/main.ll -o - | FileCheck --check-prefix=CHECK --check-prefix=NO_BASE_64 %s
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; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -mattr=+mwaitx -x86-use-base-pointer=true %t/main.ll -o - | FileCheck --check-prefix=CHECK --check-prefix=NO_BASE_32 %s
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;--- main.ll
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; This test checks that we save and restore the base pointer (ebx or rbx) in the
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; presence of the mwaitx intrinsic which requires to use ebx for one of its
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@ -208,3 +212,6 @@ if.end:
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; NO_BASE_32-NEXT: {{.+$}}
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declare void @llvm.x86.mwaitx(i32, i32, i32) nounwind
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;--- _align32.ll
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"override-stack-alignment", i32 32}
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46
test/CodeGen/X86/dynamic-allocas-VLAs-stack-align.ll
Normal file
46
test/CodeGen/X86/dynamic-allocas-VLAs-stack-align.ll
Normal file
@ -0,0 +1,46 @@
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; RUN: llc < %s -stack-symbol-ordering=0 -mcpu=generic -stackrealign -mattr=+avx -mtriple=x86_64-apple-darwin10 | FileCheck %s
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; rdar://11496434
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declare void @t1_helper(i32*)
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declare void @t3_helper(i32*, i32*)
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; Test when forcing stack alignment
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define i32 @t8() nounwind uwtable {
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entry:
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%a = alloca i32, align 4
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call void @t1_helper(i32* %a) nounwind
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%0 = load i32, i32* %a, align 4
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%add = add nsw i32 %0, 13
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ret i32 %add
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; CHECK: _t8
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; CHECK: movq %rsp, %rbp
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; CHECK: andq $-32, %rsp
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; CHECK-NEXT: subq $32, %rsp
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; CHECK: movq %rbp, %rsp
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; CHECK: popq %rbp
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}
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; VLAs
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define i32 @t9(i64 %sz) nounwind uwtable {
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entry:
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%a = alloca i32, align 4
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%vla = alloca i32, i64 %sz, align 16
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call void @t3_helper(i32* %a, i32* %vla) nounwind
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%0 = load i32, i32* %a, align 4
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%add = add nsw i32 %0, 13
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ret i32 %add
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; CHECK: _t9
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; CHECK: pushq %rbp
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; CHECK: movq %rsp, %rbp
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; CHECK: pushq %rbx
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; CHECK: andq $-32, %rsp
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; CHECK: subq $32, %rsp
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; CHECK: movq %rsp, %rbx
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; CHECK: leaq -8(%rbp), %rsp
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; CHECK: popq %rbx
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; CHECK: popq %rbp
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"override-stack-alignment", i32 32}
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@ -1,5 +1,4 @@
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; RUN: llc < %s -stack-symbol-ordering=0 -mcpu=generic -mattr=+avx -mtriple=x86_64-apple-darwin10 | FileCheck %s
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; RUN: llc < %s -stack-symbol-ordering=0 -mcpu=generic -stackrealign -stack-alignment=32 -mattr=+avx -mtriple=x86_64-apple-darwin10 | FileCheck %s -check-prefix=FORCE-ALIGN
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; rdar://11496434
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; no VLAs or dynamic alignment
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@ -184,44 +183,3 @@ declare i8* @llvm.stacksave() nounwind
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declare void @bar(i32, i32*, %struct.struct_t* byval(%struct.struct_t) align 8)
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declare void @llvm.stackrestore(i8*) nounwind
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; Test when forcing stack alignment
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define i32 @t8() nounwind uwtable {
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entry:
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%a = alloca i32, align 4
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call void @t1_helper(i32* %a) nounwind
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%0 = load i32, i32* %a, align 4
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%add = add nsw i32 %0, 13
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ret i32 %add
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; FORCE-ALIGN: _t8
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; FORCE-ALIGN: movq %rsp, %rbp
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; FORCE-ALIGN: andq $-32, %rsp
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; FORCE-ALIGN-NEXT: subq $32, %rsp
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; FORCE-ALIGN: movq %rbp, %rsp
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; FORCE-ALIGN: popq %rbp
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}
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; VLAs
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define i32 @t9(i64 %sz) nounwind uwtable {
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entry:
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%a = alloca i32, align 4
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%vla = alloca i32, i64 %sz, align 16
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call void @t3_helper(i32* %a, i32* %vla) nounwind
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%0 = load i32, i32* %a, align 4
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%add = add nsw i32 %0, 13
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ret i32 %add
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; FORCE-ALIGN: _t9
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; FORCE-ALIGN: pushq %rbp
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; FORCE-ALIGN: movq %rsp, %rbp
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; FORCE-ALIGN: pushq %rbx
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; FORCE-ALIGN: andq $-32, %rsp
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; FORCE-ALIGN: subq $32, %rsp
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; FORCE-ALIGN: movq %rsp, %rbx
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; FORCE-ALIGN: leaq -8(%rbp), %rsp
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; FORCE-ALIGN: popq %rbx
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; FORCE-ALIGN: popq %rbp
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}
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@ -3,7 +3,7 @@
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; arbitrarily force alignment up to 32-bytes for i386 hoping that this will
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; exceed any ABI provisions.
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;
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; RUN: llc < %s -mcpu=generic -stackrealign -stack-alignment=32 | FileCheck %s
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; RUN: llc < %s -mcpu=generic -stackrealign | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128"
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target triple = "i386-unknown-linux-gnu"
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@ -74,3 +74,6 @@ if.then:
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}
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declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i1) nounwind
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!llvm.module.flags = !{!0}
|
||||
!0 = !{i32 2, !"override-stack-alignment", i32 32}
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
; RUN: llc < %s -stack-symbol-ordering=0 -tailcallopt -code-model=medium -stack-alignment=4 -mtriple=i686-linux-gnu -mcpu=pentium | FileCheck %s
|
||||
; RUN: llc < %s -stack-symbol-ordering=0 -tailcallopt -code-model=medium -mtriple=i686-linux-gnu -mcpu=pentium | FileCheck %s
|
||||
|
||||
; Check the HiPE calling convention works (x86-32)
|
||||
|
||||
@ -89,3 +89,6 @@ define cc 11 { i32, i32, i32 } @tailcaller(i32 %hp, i32 %p) nounwind {
|
||||
@clos = external dso_local constant i32
|
||||
declare cc 11 void @bar(i32, i32, i32, i32, i32)
|
||||
declare cc 11 { i32, i32, i32 } @tailcallee(i32, i32, i32, i32, i32, i32)
|
||||
|
||||
!llvm.module.flags = !{!3}
|
||||
!3 = !{i32 2, !"override-stack-alignment", i32 4}
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
; RUN: llc < %s -stack-symbol-ordering=0 -tailcallopt -relocation-model=static -code-model=medium -stack-alignment=8 -mtriple=x86_64-linux-gnu -mcpu=opteron | FileCheck %s
|
||||
; RUN: llc < %s -stack-symbol-ordering=0 -tailcallopt -relocation-model=static -code-model=medium -mtriple=x86_64-linux-gnu -mcpu=opteron | FileCheck %s
|
||||
|
||||
; Check the HiPE calling convention works (x86-64)
|
||||
|
||||
@ -100,3 +100,5 @@ define cc 11 { i64, i64, i64 } @tailcaller(i64 %hp, i64 %p) #0 {
|
||||
@clos = external constant i64
|
||||
declare cc 11 void @bar(i64, i64, i64, i64, i64, i64)
|
||||
declare cc 11 { i64, i64, i64 } @tailcallee(i64, i64, i64, i64, i64, i64, i64)
|
||||
!llvm.module.flags = !{!3}
|
||||
!3 = !{i32 2, !"override-stack-alignment", i32 8}
|
||||
|
||||
52
test/CodeGen/X86/movtopush-stack-align.ll
Normal file
52
test/CodeGen/X86/movtopush-stack-align.ll
Normal file
@ -0,0 +1,52 @@
|
||||
; RUN: llc < %s -mtriple=i686-windows -stackrealign | FileCheck %s
|
||||
|
||||
declare void @good(i32 %a, i32 %b, i32 %c, i32 %d)
|
||||
declare void @oneparam(i32 %a)
|
||||
declare void @eightparams(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h)
|
||||
|
||||
; When there is no reserved call frame, check that additional alignment
|
||||
; is added when the pushes don't add up to the required alignment.
|
||||
; CHECK-LABEL: test5:
|
||||
; CHECK: subl $16, %esp
|
||||
; CHECK-NEXT: pushl $4
|
||||
; CHECK-NEXT: pushl $3
|
||||
; CHECK-NEXT: pushl $2
|
||||
; CHECK-NEXT: pushl $1
|
||||
; CHECK-NEXT: call
|
||||
define void @test5(i32 %k) {
|
||||
entry:
|
||||
%a = alloca i32, i32 %k
|
||||
call void @good(i32 1, i32 2, i32 3, i32 4)
|
||||
ret void
|
||||
}
|
||||
|
||||
; When the alignment adds up, do the transformation
|
||||
; CHECK-LABEL: test5b:
|
||||
; CHECK: pushl $8
|
||||
; CHECK-NEXT: pushl $7
|
||||
; CHECK-NEXT: pushl $6
|
||||
; CHECK-NEXT: pushl $5
|
||||
; CHECK-NEXT: pushl $4
|
||||
; CHECK-NEXT: pushl $3
|
||||
; CHECK-NEXT: pushl $2
|
||||
; CHECK-NEXT: pushl $1
|
||||
; CHECK-NEXT: call
|
||||
define void @test5b() optsize {
|
||||
entry:
|
||||
call void @eightparams(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8)
|
||||
ret void
|
||||
}
|
||||
|
||||
; When having to compensate for the alignment isn't worth it,
|
||||
; don't use pushes.
|
||||
; CHECK-LABEL: test5c:
|
||||
; CHECK: movl $1, (%esp)
|
||||
; CHECK-NEXT: call
|
||||
define void @test5c() optsize {
|
||||
entry:
|
||||
call void @oneparam(i32 1)
|
||||
ret void
|
||||
}
|
||||
|
||||
!llvm.module.flags = !{!0}
|
||||
!0 = !{i32 2, !"override-stack-alignment", i32 32}
|
||||
@ -1,7 +1,6 @@
|
||||
; RUN: llc < %s -mtriple=i686-windows | FileCheck %s -check-prefix=NORMAL
|
||||
; RUN: llc < %s -mtriple=i686-windows -no-x86-call-frame-opt | FileCheck %s -check-prefix=NOPUSH
|
||||
; RUN: llc < %s -mtriple=x86_64-windows | FileCheck %s -check-prefix=X64
|
||||
; RUN: llc < %s -mtriple=i686-windows -stackrealign -stack-alignment=32 | FileCheck %s -check-prefix=ALIGNED
|
||||
; RUN: llc < %s -mtriple=i686-pc-linux | FileCheck %s -check-prefix=LINUX
|
||||
|
||||
%class.Class = type { i32 }
|
||||
@ -125,50 +124,6 @@ entry:
|
||||
ret void
|
||||
}
|
||||
|
||||
; When there is no reserved call frame, check that additional alignment
|
||||
; is added when the pushes don't add up to the required alignment.
|
||||
; ALIGNED-LABEL: test5:
|
||||
; ALIGNED: subl $16, %esp
|
||||
; ALIGNED-NEXT: pushl $4
|
||||
; ALIGNED-NEXT: pushl $3
|
||||
; ALIGNED-NEXT: pushl $2
|
||||
; ALIGNED-NEXT: pushl $1
|
||||
; ALIGNED-NEXT: call
|
||||
define void @test5(i32 %k) {
|
||||
entry:
|
||||
%a = alloca i32, i32 %k
|
||||
call void @good(i32 1, i32 2, i32 3, i32 4)
|
||||
ret void
|
||||
}
|
||||
|
||||
; When the alignment adds up, do the transformation
|
||||
; ALIGNED-LABEL: test5b:
|
||||
; ALIGNED: pushl $8
|
||||
; ALIGNED-NEXT: pushl $7
|
||||
; ALIGNED-NEXT: pushl $6
|
||||
; ALIGNED-NEXT: pushl $5
|
||||
; ALIGNED-NEXT: pushl $4
|
||||
; ALIGNED-NEXT: pushl $3
|
||||
; ALIGNED-NEXT: pushl $2
|
||||
; ALIGNED-NEXT: pushl $1
|
||||
; ALIGNED-NEXT: call
|
||||
define void @test5b() optsize {
|
||||
entry:
|
||||
call void @eightparams(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8)
|
||||
ret void
|
||||
}
|
||||
|
||||
; When having to compensate for the alignment isn't worth it,
|
||||
; don't use pushes.
|
||||
; ALIGNED-LABEL: test5c:
|
||||
; ALIGNED: movl $1, (%esp)
|
||||
; ALIGNED-NEXT: call
|
||||
define void @test5c() optsize {
|
||||
entry:
|
||||
call void @oneparam(i32 1)
|
||||
ret void
|
||||
}
|
||||
|
||||
; Check that pushing the addresses of globals (Or generally, things that
|
||||
; aren't exactly immediates) isn't broken.
|
||||
; Fixes PR21878.
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
; RUN: llc < %s -stackrealign -stack-alignment=32 -mattr=+avx -mtriple=x86_64-apple-darwin10 | FileCheck %s
|
||||
; RUN: llc < %s -stackrealign -mattr=+avx -mtriple=x86_64-apple-darwin10 | FileCheck %s
|
||||
; PR11468
|
||||
|
||||
define void @f(i64 %sz) uwtable {
|
||||
@ -29,5 +29,6 @@ entry:
|
||||
; CHECK: popq %rbp
|
||||
}
|
||||
|
||||
!llvm.module.flags = !{!1}
|
||||
!0 = !{i32 125}
|
||||
|
||||
!1 = !{i32 2, !"override-stack-alignment", i32 32}
|
||||
|
||||
@ -1,7 +1,11 @@
|
||||
; RUN: llc -mtriple=i386-unknown-freebsd -mcpu=core2 -stack-alignment=4 -relocation-model=pic < %s | FileCheck %s -check-prefix=UNALIGNED
|
||||
; RUN: llc -mtriple=i386-unknown-freebsd -mcpu=core2 -stack-alignment=16 -relocation-model=pic < %s | FileCheck %s -check-prefix=ALIGNED
|
||||
; RUN: llc -mtriple=i386-unknown-freebsd -mcpu=core2 -stack-alignment=4 -stackrealign -relocation-model=pic < %s | FileCheck %s -check-prefix=FORCEALIGNED
|
||||
; RUN: split-file %s %t
|
||||
; RUN: cat %t/main.ll %t/align4.ll > %t/a2.ll
|
||||
; RUN: cat %t/main.ll %t/align16.ll > %t/b2.ll
|
||||
; RUN: llc -mtriple=i386-unknown-freebsd -mcpu=core2 -relocation-model=pic < %t/a2.ll | FileCheck %s -check-prefix=UNALIGNED
|
||||
; RUN: llc -mtriple=i386-unknown-freebsd -mcpu=core2 -relocation-model=pic < %t/b2.ll | FileCheck %s -check-prefix=ALIGNED
|
||||
; RUN: llc -mtriple=i386-unknown-freebsd -mcpu=core2 -stackrealign -relocation-model=pic < %t/a2.ll | FileCheck %s -check-prefix=FORCEALIGNED
|
||||
|
||||
;--- main.ll
|
||||
@arr = internal unnamed_addr global [32 x i32] zeroinitializer, align 16
|
||||
|
||||
; PR12250
|
||||
@ -47,3 +51,8 @@ middle.block:
|
||||
; FORCEALIGNED: movdqa {{.*}} # 16-byte Spill
|
||||
; FORCEALIGNED: paddd {{.*}} # 16-byte Folded Reload
|
||||
}
|
||||
!llvm.module.flags = !{!0}
|
||||
;--- align4.ll
|
||||
!0 = !{i32 2, !"override-stack-alignment", i32 4}
|
||||
;--- align16.ll
|
||||
!0 = !{i32 2, !"override-stack-alignment", i32 16}
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
||||
; RUN: llc -mtriple=x86_64-pc-linux -stackrealign -stack-alignment=32 < %s | FileCheck %s
|
||||
; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -stackrealign -stack-alignment=32 < %s | FileCheck -check-prefix=X32ABI %s
|
||||
; RUN: llc -mtriple=x86_64-pc-linux -stackrealign < %s | FileCheck %s
|
||||
; RUN: llc -mtriple=x86_64-pc-linux-gnux32 -stackrealign < %s | FileCheck -check-prefix=X32ABI %s
|
||||
|
||||
; This should run with NaCl as well ( -mtriple=x86_64-pc-nacl ) but currently doesn't due to PR22655
|
||||
|
||||
@ -65,3 +65,5 @@ entry:
|
||||
}
|
||||
|
||||
attributes #0 = { nounwind "frame-pointer"="all"}
|
||||
!llvm.module.flags = !{!0}
|
||||
!0 = !{i32 2, !"override-stack-alignment", i32 32}
|
||||
|
||||
@ -2,7 +2,7 @@
|
||||
; elements (here: XMM spills) are accessed using instructions that tolerate
|
||||
; unaligned access.
|
||||
;
|
||||
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=x86-64 -mattr=+sse,+sse-unaligned-mem -stack-alignment=8 --frame-pointer=all < %s | FileCheck %s
|
||||
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=x86-64 -mattr=+sse,+sse-unaligned-mem --frame-pointer=all < %s | FileCheck %s
|
||||
|
||||
define dso_local preserve_allcc void @func() #0 {
|
||||
; CHECK-LABEL: func:
|
||||
@ -13,3 +13,5 @@ define dso_local preserve_allcc void @func() #0 {
|
||||
}
|
||||
|
||||
attributes #0 = { nounwind }
|
||||
!llvm.module.flags = !{!0}
|
||||
!0 = !{i32 2, !"override-stack-alignment", i32 8}
|
||||
|
||||
15
test/Linker/stack-alignment.ll
Normal file
15
test/Linker/stack-alignment.ll
Normal file
@ -0,0 +1,15 @@
|
||||
; RUN: split-file %s %t
|
||||
; RUN: llvm-link %t/main.ll %t/8.ll
|
||||
; RUN: not llvm-link %t/main.ll %t/16.ll 2>&1 | FileCheck --check-prefix=CHECK-16 %s
|
||||
|
||||
;--- main.ll
|
||||
; NONE: error: linking module flags 'override-stack-alignment': IDs have conflicting values
|
||||
; CHECK-16: error: linking module flags 'override-stack-alignment': IDs have conflicting values
|
||||
!llvm.module.flags = !{!0}
|
||||
!0 = !{i32 1, !"override-stack-alignment", i32 8}
|
||||
;--- 8.ll
|
||||
!llvm.module.flags = !{!0}
|
||||
!0 = !{i32 1, !"override-stack-alignment", i32 8}
|
||||
;--- 16.ll
|
||||
!llvm.module.flags = !{!0}
|
||||
!0 = !{i32 1, !"override-stack-alignment", i32 16}
|
||||
Loading…
Reference in New Issue
Block a user