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Recommit 116056, now with the missing file...

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llvm-svn: 116083
This commit is contained in:
Cameron Esfahani 2010-10-08 19:24:18 +00:00
parent 8833658eb0
commit 664317d6cd
3 changed files with 18 additions and 2 deletions
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6
lib/Target/X86/X86ISelLowering.cpp
View File

@ -1701,8 +1701,12 @@ X86TargetLowering::LowerFormalArguments(SDValue Chain,
TotalNumXMMRegs = 0;
if (IsWin64) {
const TargetFrameInfo &TFI = *getTargetMachine().getFrameInfo();
// Get to the caller-allocated home save location. Add 8 to account
// for the return address.
int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
FuncInfo->setRegSaveFrameIndex(
MFI->CreateFixedObject(1, NumIntRegs * 8, false));
MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
} else {
// For X86-64, if there are vararg parameters that are passed via

3
lib/Target/X86/X86TargetMachine.cpp
View File

@ -121,7 +121,8 @@ X86TargetMachine::X86TargetMachine(const Target &T, const std::string &TT,
Subtarget(TT, FS, is64Bit),
FrameInfo(TargetFrameInfo::StackGrowsDown,
Subtarget.getStackAlignment(),
Subtarget.is64Bit() ? -8 : -4),
(Subtarget.isTargetWin64() ? -40 :
(Subtarget.is64Bit() ? -8 : -4))),
ELFWriterInfo(is64Bit, true) {
DefRelocModel = getRelocationModel();

11
test/CodeGen/X86/win64_params.ll Normal file
View File

@ -0,0 +1,11 @@
; RUN: llc < %s -mtriple=x86_64-pc-win32 | FileCheck %s
; Verify that the 5th and 6th parameters are coming from the correct location
; on the stack.
define i32 @f6(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5, i32 %p6) nounwind readnone optsize {
entry:
; CHECK: movl 80(%rsp), %eax
; CHECK: addl 72(%rsp), %eax
%add = add nsw i32 %p6, %p5
ret i32 %add
}