[PATCH] D72788: TableGen/GlobalISel: Handle non-leaf EXTRACT_SUBREG

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: dsanders, paquette, igorb, craig.topper, aemerson, aditya_nandakumar.
Herald added subscribers: Petar.Avramovic, rovka, wdng.
Herald added a project: LLVM.

This previously only handled EXTRACT_SUBREGs from leafs, such as
operands directly in the original output. Handle extracting from a
result instruction.


https://reviews.llvm.org/D72788

Files:
  llvm/include/llvm/CodeGen/GlobalISel/InstructionSelector.h
  llvm/include/llvm/CodeGen/GlobalISel/InstructionSelectorImpl.h
  llvm/test/CodeGen/X86/GlobalISel/select-copy.mir
  llvm/test/CodeGen/X86/GlobalISel/select-ext.mir
  llvm/test/CodeGen/X86/GlobalISel/shl-scalar-widening.ll
  llvm/test/CodeGen/X86/GlobalISel/x86-select-sdiv.mir
  llvm/test/CodeGen/X86/GlobalISel/x86_64-select-zext.mir
  llvm/test/TableGen/GlobalISelEmitterSubreg.td
  llvm/utils/TableGen/GlobalISelEmitter.cpp

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