[PATCH] D156164: [HACK] X86: Disable isCopyInstrImpl for undef subregister defs

[Matt Arsenault via Phabricator via llvm-commits]

arsenm updated this revision to Diff 543736.
arsenm edited the summary of this revision.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D156164/new/

https://reviews.llvm.org/D156164

Files:
  llvm/lib/Target/X86/X86InstrInfo.cpp
  llvm/test/CodeGen/X86/GlobalISel/add-ext.ll
  llvm/test/CodeGen/X86/coalescer-breaks-subreg-to-reg-liveness.ll
  llvm/test/CodeGen/X86/dagcombine-cse.ll
  llvm/test/CodeGen/X86/fold-and-shift-x86_64.ll
  llvm/test/CodeGen/X86/unfold-masked-merge-scalar-constmask-lowhigh.ll

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