diff options
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index 78d46398a1..aa0597f687 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -454,7 +454,14 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb, // Value#0 is now defined by the 2-addr instruction. OldValNo->def = RedefIndex; - OldValNo->setCopy(0); + if (!PartReDef) + OldValNo->setCopy(0); + else { + // A re-def may be a copy. e.g. %reg1030:6<def> = VMOVD %reg1026, ... + unsigned SrcReg, DstReg, SrcSubReg, DstSubReg; + if (tii_->isMoveInstr(*mi, SrcReg, DstReg, SrcSubReg, DstSubReg)) + OldValNo->setCopy(&*mi); + } // Add the new live interval which replaces the range for the input copy. LiveRange LR(DefIndex, RedefIndex, ValNo); |