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| author | Anton Korobeynikov <asl@math.spbu.ru> | 2008-04-23 18:17:11 +0000 |
|---|---|---|
| committer | Anton Korobeynikov <asl@math.spbu.ru> | 2008-04-23 18:17:11 +0000 |
| commit | cfcd20e7bece78e79e4509abcdc312aa0b1b6e15 (patch) | |
| tree | 47549b32e58edfa2c4971df3af8ef0fb43dbc746 | |
| parent | 35410a493bb393d0d8d5868feb5ef901aba64575 (diff) | |
Provide option for enabling-disabling stack realignment
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50156 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp index 9059a4e65e..f923aef60d 100644 --- a/lib/Target/X86/X86RegisterInfo.cpp +++ b/lib/Target/X86/X86RegisterInfo.cpp @@ -29,6 +29,7 @@ #include "llvm/CodeGen/MachineLocation.h" #include "llvm/CodeGen/MachineModuleInfo.h" #include "llvm/CodeGen/MachineRegisterInfo.h" +#include "llvm/Support/CommandLine.h" #include "llvm/Target/TargetAsmInfo.h" #include "llvm/Target/TargetFrameInfo.h" #include "llvm/Target/TargetInstrInfo.h" @@ -38,6 +39,10 @@ #include "llvm/ADT/STLExtras.h" using namespace llvm; +static cl::opt<bool> +RealignStack("realign-stack", cl::init(true), + cl::desc("Realign stack if needed")); + X86RegisterInfo::X86RegisterInfo(X86TargetMachine &tm, const TargetInstrInfo &tii) : X86GenRegisterInfo(X86::ADJCALLSTACKDOWN, X86::ADJCALLSTACKUP), @@ -269,8 +274,9 @@ bool X86RegisterInfo::needsStackRealignment(const MachineFunction &MF) const { // FIXME: Currently we don't support stack realignment for functions with // variable-sized allocas - return (MFI->getMaxAlignment() > StackAlign && - !MFI->hasVarSizedObjects()); + return (RealignStack && + (MFI->getMaxAlignment() > StackAlign && + !MFI->hasVarSizedObjects())); } bool X86RegisterInfo::hasReservedCallFrame(MachineFunction &MF) const { |