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| author | Hans Wennborg <hans@hanshq.net> | 2016-05-18 16:10:17 +0000 |
|---|---|---|
| committer | Hans Wennborg <hans@hanshq.net> | 2016-05-18 16:10:17 +0000 |
| commit | 8eb336c14e4c033a3f81a3a43fe397f0879a2e68 (patch) | |
| tree | e85fba6e6e6ed0c2528c0c565c6fea53085520d6 /llvm/lib/Target/X86/X86TargetMachine.cpp | |
| parent | 9430b9113a54eafaa9bd7d7bb288c7a457d26404 (diff) | |
| download | llvm-8eb336c14e4c033a3f81a3a43fe397f0879a2e68.zip llvm-8eb336c14e4c033a3f81a3a43fe397f0879a2e68.tar.gz llvm-8eb336c14e4c033a3f81a3a43fe397f0879a2e68.tar.bz2 | |
Re-commit r269828 "X86: Avoid using _chkstk when lowering WIN_ALLOCA instructions"
with an additional fix to make RegAllocFast ignore undef physreg uses. It would
previously get confused about the "push %eax" instruction's use of eax. That
method for adjusting the stack pointer is used in X86FrameLowering::emitSPUpdate
as well, but since that runs after register-allocation, we didn't run into the
RegAllocFast issue before.
llvm-svn: 269949
Diffstat (limited to 'llvm/lib/Target/X86/X86TargetMachine.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86TargetMachine.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp index cde3197..1fe98a6 100644 --- a/llvm/lib/Target/X86/X86TargetMachine.cpp +++ b/llvm/lib/Target/X86/X86TargetMachine.cpp @@ -266,6 +266,7 @@ void X86PassConfig::addPreRegAlloc() { addPass(createX86OptimizeLEAs()); addPass(createX86CallFrameOptimization()); + addPass(createX86WinAllocaExpander()); } void X86PassConfig::addPostRegAlloc() { |