[PATCH] D65126: AMDGPU/GlobalISel: Don't assume instruction can be erased when selecting exts

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: tstellar, nhaehnle.
Herald added subscribers: Petar.Avramovic, t-tye, tpr, dstuttard, rovka, yaxunl, wdng, jvesely, kzhuravl.

The G_ANYEXT handling can end up reaching selectCOPY, which mutates
the instruction in place.


https://reviews.llvm.org/D65126

Files:
  lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
  test/CodeGen/AMDGPU/GlobalISel/inst-select-anyext.mir

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