diff options
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index a996aea481..00c212d4b8 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -1073,9 +1073,11 @@ bool LiveIntervals::JoinCopy(MachineInstr *CopyMI, // have clobbered values for this range. if (MRegisterInfo::isPhysicalRegister(repDstReg)) { // Unset unnecessary kills. - for (LiveInterval::Ranges::const_iterator I = SrcInt.begin(), - E = SrcInt.end(); I != E; ++I) - unsetRegisterKills(I->start, I->end, repDstReg); + if (!DstInt.containsOneValue()) { + for (LiveInterval::Ranges::const_iterator I = SrcInt.begin(), + E = SrcInt.end(); I != E; ++I) + unsetRegisterKills(I->start, I->end, repDstReg); + } // Update the liveintervals of sub-registers. for (const unsigned *AS = mri_->getSubRegisters(repDstReg); *AS; ++AS) |