[PATCH] D126041: [RegisterCoalescer] fix subregister index in remat call

[Afanasyev Ivan via Phabricator via llvm-commits]

ivafanas created this revision.
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`TII->reMaterialize` accepts sub register index which denotes dst reg substituion. `DstIdx` should be passed instead of `SrcIdx`, because `SrcIdx` relates to another register.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126041

Files:
  llvm/lib/CodeGen/RegisterCoalescer.cpp


Index: llvm/lib/CodeGen/RegisterCoalescer.cpp
===================================================================
--- llvm/lib/CodeGen/RegisterCoalescer.cpp
+++ llvm/lib/CodeGen/RegisterCoalescer.cpp
@@ -1359,7 +1359,7 @@
   MachineBasicBlock *MBB = CopyMI->getParent();
   MachineBasicBlock::iterator MII =
     std::next(MachineBasicBlock::iterator(CopyMI));
-  TII->reMaterialize(*MBB, MII, DstReg, SrcIdx, *DefMI, *TRI);
+  TII->reMaterialize(*MBB, MII, DstReg, DstIdx, *DefMI, *TRI);
   MachineInstr &NewMI = *std::prev(MII);
   NewMI.setDebugLoc(DL);
 


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