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| author | Hal Finkel <hfinkel@anl.gov> | 2013-04-18 22:54:25 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-04-18 22:54:25 +0000 |
| commit | 4029c3feed5c9a5b0793e3da140ecaabef19e3fe (patch) | |
| tree | a3612693471961fbbc1ccb3a6175fe628cc55d68 /lib/Target/PowerPC/PPCInstrInfo.cpp | |
| parent | 88eb89b89f9426feb7be9b19d1a664b37c590bdb (diff) | |
| download | external_llvm-4029c3feed5c9a5b0793e3da140ecaabef19e3fe.zip external_llvm-4029c3feed5c9a5b0793e3da140ecaabef19e3fe.tar.gz external_llvm-4029c3feed5c9a5b0793e3da140ecaabef19e3fe.tar.bz2 | |
Disable PPC comparison optimization by default
This seems to cause a stage-2 LLVM compile failure (by crashing TableGen); do
I'm disabling this for now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179807 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCInstrInfo.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCInstrInfo.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp index b78f071..cd50bb5 100644 --- a/lib/Target/PowerPC/PPCInstrInfo.cpp +++ b/lib/Target/PowerPC/PPCInstrInfo.cpp @@ -42,6 +42,9 @@ static cl:: opt<bool> DisableCTRLoopAnal("disable-ppc-ctrloop-analysis", cl::Hidden, cl::desc("Disable analysis for CTR loops")); +static cl::opt<bool> DisableCmpOpt("disable-ppc-cmp-opt", cl::init(true), +cl::desc("Disable compare instruction optimization"), cl::Hidden); + PPCInstrInfo::PPCInstrInfo(PPCTargetMachine &tm) : PPCGenInstrInfo(PPC::ADJCALLSTACKDOWN, PPC::ADJCALLSTACKUP), TM(tm), RI(*TM.getSubtargetImpl(), *this) {} @@ -1088,6 +1091,9 @@ bool PPCInstrInfo::optimizeCompareInstr(MachineInstr *CmpInstr, unsigned SrcReg, unsigned SrcReg2, int Mask, int Value, const MachineRegisterInfo *MRI) const { + if (DisableCmpOpt) + return false; + int OpC = CmpInstr->getOpcode(); unsigned CRReg = CmpInstr->getOperand(0).getReg(); bool isFP = OpC == PPC::FCMPUS || OpC == PPC::FCMPUD; |