diff options
| -rw-r--r-- | lib/CodeGen/RegisterCoalescer.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/CodeGen/RegisterCoalescer.cpp b/lib/CodeGen/RegisterCoalescer.cpp index 8795c0d715..00393bbe8a 100644 --- a/lib/CodeGen/RegisterCoalescer.cpp +++ b/lib/CodeGen/RegisterCoalescer.cpp @@ -408,6 +408,8 @@ void RegisterCoalescer::markAsJoined(MachineInstr *CopyMI) { /// bool RegisterCoalescer::adjustCopiesBackFrom(const CoalescerPair &CP, MachineInstr *CopyMI) { + assert(!CP.isPartial() && "This doesn't work for partial copies."); + // Bail if there is no dst interval - can happen when merging physical subreg // operations. if (!LIS->hasInterval(CP.getDstReg())) @@ -529,7 +531,7 @@ bool RegisterCoalescer::adjustCopiesBackFrom(const CoalescerPair &CP, // Rewrite the copy. If the copy instruction was killing the destination // register before the merge, find the last use and trim the live range. That // will also add the isKill marker. - CopyMI->substituteRegister(IntA.reg, IntB.reg, CP.getSrcIdx(), *TRI); + CopyMI->substituteRegister(IntA.reg, IntB.reg, 0, *TRI); if (ALR->end == CopyIdx) LIS->shrinkToUses(&IntA); |