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| author | Jim Grosbach <grosbach@apple.com> | 2010-09-02 17:12:55 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2010-09-02 17:12:55 +0000 |
| commit | 944aece38a5c9b411570f2b3c69658a0691d9525 (patch) | |
| tree | ab180ea50a21dbebb0f792c124dcc89136d2a866 /llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp | |
| parent | da3ef85460d62f99192cee75b8092d016d6b619c (diff) | |
| download | bcm5719-llvm-944aece38a5c9b411570f2b3c69658a0691d9525.tar.gz bcm5719-llvm-944aece38a5c9b411570f2b3c69658a0691d9525.zip | |
Anti-dependency breaking needs to be careful not to use reserved regs
llvm-svn: 112832
Diffstat (limited to 'llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp index 62e40e9636b..5a634d6ccb0 100644 --- a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp +++ b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp @@ -654,6 +654,8 @@ bool AggressiveAntiDepBreaker::FindSuitableFreeRegisters( if (R == RB) R = RE; --R; const unsigned NewSuperReg = *R; + // Don't consider non-allocatable registers + if (!AllocatableSet.test(NewSuperReg)) continue; // Don't replace a register with itself. if (NewSuperReg == SuperReg) continue; |
