diff options
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index ce2e4290b1..5e17a734a2 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -828,6 +828,12 @@ bool LiveIntervals::AdjustCopiesBackFrom(LiveInterval &IntA, LiveInterval &IntB, IntB.MergeValueNumberInto(BValNo, ValLR->ValId); DOUT << " result = "; IntB.print(DOUT, mri_); DOUT << "\n"; + + // If the source instruction was killing the source register before the + // merge, unset the isKill marker given the live range has been extended. + MachineOperand *MOK = ValLREndInst->findRegisterUseOperand(IntB.reg, true); + if (MOK) + MOK->unsetIsKill(); // Finally, delete the copy instruction. RemoveMachineInstrFromMaps(CopyMI); |