diff options
| -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 { |