diff options
| -rw-r--r-- | lib/CodeGen/PeepholeOptimizer.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/PeepholeOptimizer.cpp b/lib/CodeGen/PeepholeOptimizer.cpp index 203f2bf..9c5c029 100644 --- a/lib/CodeGen/PeepholeOptimizer.cpp +++ b/lib/CodeGen/PeepholeOptimizer.cpp @@ -237,6 +237,10 @@ OptimizeExtInstr(MachineInstr *MI, MachineBasicBlock *MBB, if (PHIBBs.count(UseMBB)) continue; + // About to add uses of DstReg, clear DstReg's kill flags. + if (!Changed) + MRI->clearKillFlags(DstReg); + unsigned NewVR = MRI->createVirtualRegister(RC); BuildMI(*UseMBB, UseMI, UseMI->getDebugLoc(), TII->get(TargetOpcode::COPY), NewVR) |