diff options
| author | Cameron Esfahani <dirty@apple.com> | 2010-10-08 10:31:30 +0000 |
|---|---|---|
| committer | Cameron Esfahani <dirty@apple.com> | 2010-10-08 10:31:30 +0000 |
| commit | d7b8d91d4a2a284bbe9ef6f32b3c25daa7ea0513 (patch) | |
| tree | 04ef0b22e2d00a7293d9a5eca580c5aa03a07728 | |
| parent | 7d24705f6538688937f571961d41c7bb2985c7e3 (diff) | |
Small patch to restore home register stack space allocation for the Win64 case. Add test case. This code eventually needs to be tighter, since it's always allocating it, even in leaf routines.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116056 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 6 | ||||
| -rw-r--r-- | test/CodeGen/X86/win64_params.ll | 11 |
2 files changed, 16 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 66f9612e02..27226d885d 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -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 diff --git a/test/CodeGen/X86/win64_params.ll b/test/CodeGen/X86/win64_params.ll new file mode 100644 index 0000000000..0b67368e04 --- /dev/null +++ b/test/CodeGen/X86/win64_params.ll @@ -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 +} |