diff options
Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCInstrInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCInstrInfo.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp index ff2633eac3f..daf8790fefc 100644 --- a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp +++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp @@ -1754,6 +1754,12 @@ protected: unsigned OldFMAReg = MI->getOperand(0).getReg(); + // The transformation doesn't work well with things like: + // %vreg5 = A-form-op %vreg5, %vreg11, %vreg5; + // so leave such things alone. + if (OldFMAReg == KilledProdReg) + continue; + assert(OldFMAReg == AddendMI->getOperand(0).getReg() && "Addend copy not tied to old FMA output!"); |
