diff options
Diffstat (limited to 'llvm/lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/LiveIntervalAnalysis.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp index 7c07c045dc3..a626fc03937 100644 --- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -324,6 +324,12 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb, if (mi->isCopyLike() || tii_->isMoveInstr(*mi, SrcReg, DstReg, SrcSubReg, DstSubReg)) { CopyMI = mi; + + // Some of the REG_SEQUENCE lowering in TwoAddressInstrPass creates + // implicit defs without really knowing. It shows up as INSERT_SUBREG + // using an undefined register. + if (mi->isInsertSubreg()) + mi->getOperand(1).setIsUndef(); } VNInfo *ValNo = interval.getNextValue(defIndex, CopyMI, true, |
