diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 2eb9841..9ce0046 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -1744,8 +1744,8 @@ X86TargetLowering::LowerFormalArguments(SDValue Chain, // If the function takes variable number of arguments, make a frame index for // the start of the first vararg value... for expansion of llvm.va_start. if (isVarArg) { - if (!IsWin64 && (Is64Bit || (CallConv != CallingConv::X86_FastCall && - CallConv != CallingConv::X86_ThisCall))) { + if (Is64Bit || (CallConv != CallingConv::X86_FastCall && + CallConv != CallingConv::X86_ThisCall)) { FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true)); } if (Is64Bit) { @@ -1797,7 +1797,9 @@ X86TargetLowering::LowerFormalArguments(SDValue Chain, int HomeOffset = TFI.getOffsetOfLocalArea() + 8; FuncInfo->setRegSaveFrameIndex( MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false)); - FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex()); + // Fixup to set vararg frame on shadow area (4 x i64). + if (NumIntRegs < 4) + FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex()); } else { // For X86-64, if there are vararg parameters that are passed via // registers, then we must store them to their spots on the stack so they |