[PATCH] D101871: [GlobalISel] Fix buildZExtInReg creating new register.

[Vang Thao via Phabricator via llvm-commits]

vangthao created this revision.
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vangthao requested review of this revision.
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Fix a bug where buildZExtInReg will create and use a new register instead of using the register from parameter DstOp Res.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101871

Files:
  llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp


Index: llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
===================================================================
--- llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
+++ llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
@@ -492,7 +492,7 @@
   LLT ResTy = Res.getLLTTy(*getMRI());
   auto Mask = buildConstant(
       ResTy, APInt::getLowBitsSet(ResTy.getScalarSizeInBits(), ImmOp));
-  return buildAnd(ResTy, Op, Mask);
+  return buildAnd(Res, Op, Mask);
 }
 
 MachineInstrBuilder MachineIRBuilder::buildCast(const DstOp &Dst,


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