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| author | Alexey Bataev <a.bataev@hotmail.com> | 2015-12-04 10:53:15 +0000 |
|---|---|---|
| committer | Alexey Bataev <a.bataev@hotmail.com> | 2015-12-04 10:53:15 +0000 |
| commit | 7cf324772fdeff1db07e6aea8f8f57242f7b9945 (patch) | |
| tree | 1515710008c9c116086791fb7717bfa8d3c2e124 /llvm/lib/Target/X86/X86TargetMachine.cpp | |
| parent | 1e577e66e9b50659ecee42b581f7f31a9d4d3d9b (diff) | |
| download | bcm5719-llvm-7cf324772fdeff1db07e6aea8f8f57242f7b9945.tar.gz bcm5719-llvm-7cf324772fdeff1db07e6aea8f8f57242f7b9945.zip | |
LEA code size optimization pass (Part 1): Remove redundant address recalculations, by Andrey Turetsky
Add new x86 pass which replaces address calculations in load or store instructions with def register of existing LEA (must be in the same basic block), if the LEA calculates address that differs only by a displacement. Works only with -Os or -Oz.
Differential Revision: http://reviews.llvm.org/D13294
llvm-svn: 254712
Diffstat (limited to 'llvm/lib/Target/X86/X86TargetMachine.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86TargetMachine.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp index 2e869eb7c3c..0e7e4c0c84a 100644 --- a/llvm/lib/Target/X86/X86TargetMachine.cpp +++ b/llvm/lib/Target/X86/X86TargetMachine.cpp @@ -254,6 +254,9 @@ bool X86PassConfig::addPreISel() { } void X86PassConfig::addPreRegAlloc() { + if (getOptLevel() != CodeGenOpt::None) + addPass(createX86OptimizeLEAs()); + addPass(createX86CallFrameOptimization()); } |
