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

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added subscribers: pengfei, hiraditya.
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arsenm requested review of this revision.
Herald added a subscriber: wdng.
Herald added a project: LLVM.

Quick and dirty hack to see if it fixes failure.


https://reviews.llvm.org/D156164

Files:
  llvm/lib/Target/X86/X86InstrInfo.cpp
  llvm/test/CodeGen/X86/GlobalISel/add-ext.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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