diff options
| 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 | |
| parent | 88eb89b89f9426feb7be9b19d1a664b37c590bdb (diff) | |
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
| -rw-r--r-- | lib/Target/PowerPC/PPCInstrInfo.cpp | 6 | ||||
| -rw-r--r-- | test/CodeGen/PowerPC/optcmp.ll | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp index b78f071ef65..cd50bb5306e 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; diff --git a/test/CodeGen/PowerPC/optcmp.ll b/test/CodeGen/PowerPC/optcmp.ll index 6d1f90637b5..d348541dc5f 100644 --- a/test/CodeGen/PowerPC/optcmp.ll +++ b/test/CodeGen/PowerPC/optcmp.ll @@ -1,4 +1,4 @@ -; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 | FileCheck %s +; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 -disable-ppc-cmp-opt=0 | FileCheck %s target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64" target triple = "powerpc64-unknown-linux-gnu" |