diff options
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCVSXFMAMutate.cpp | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCVSXFMAMutate.cpp b/llvm/lib/Target/PowerPC/PPCVSXFMAMutate.cpp index 58d3c3d3fa2..974857556dc 100644 --- a/llvm/lib/Target/PowerPC/PPCVSXFMAMutate.cpp +++ b/llvm/lib/Target/PowerPC/PPCVSXFMAMutate.cpp @@ -189,7 +189,6 @@ protected: // Transform: (O2 * O3) + O1 -> (O2 * O1) + O3. - unsigned AddReg = AddendMI->getOperand(1).getReg(); unsigned KilledProdReg = MI->getOperand(KilledProdOp).getReg(); unsigned OtherProdReg = MI->getOperand(OtherProdOp).getReg(); @@ -220,7 +219,7 @@ protected: MI->getOperand(0).setReg(KilledProdReg); MI->getOperand(1).setReg(KilledProdReg); - MI->getOperand(3).setReg(AddReg); + MI->getOperand(3).setReg(AddendSrcReg); MI->getOperand(2).setReg(OtherProdReg); MI->getOperand(0).setSubReg(KilledProdSubReg); @@ -278,6 +277,20 @@ protected: } DEBUG(dbgs() << " extended: " << NewFMAInt << '\n'); + // Extend the live interval of the addend source (it might end at the + // copy to be removed, or somewhere in between there and here). This + // is necessary only if it is a physical register. + if (!TargetRegisterInfo::isVirtualRegister(AddendSrcReg)) + for (MCRegUnitIterator Units(AddendSrcReg, TRI); Units.isValid(); + ++Units) { + unsigned Unit = *Units; + + LiveRange &AddendSrcRange = LIS->getRegUnit(Unit); + AddendSrcRange.extendInBlock(LIS->getMBBStartIdx(&MBB), + FMAIdx.getRegSlot()); + DEBUG(dbgs() << " extended: " << AddendSrcRange << '\n'); + } + FMAInt.removeValNo(FMAValNo); DEBUG(dbgs() << " trimmed: " << FMAInt << '\n'); |
