From 16191f03337645dc1638b7489d71d685e6c07cdd Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Sun, 25 Feb 2007 09:41:59 +0000 Subject: [PATCH] If the liveinterval of the source instruction has been extended, remove the IsKill marker. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34594 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveIntervalAnalysis.cpp | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index ce2e4290b16..5e17a734a21 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);