[PATCH] D87166: [GlobalISel] Add G_UNMERGE(Cst) -> Cst1, Cst2, ... combine

[Quentin Colombet via Phabricator via llvm-commits]

qcolombet created this revision.
qcolombet added reviewers: aemerson, paquette, arsenm, volkan.
Herald added subscribers: hiraditya, rovka.
Herald added a project: LLVM.
qcolombet requested review of this revision.
Herald added a subscriber: wdng.

Add a combiner helper that replaces G_UNMERGE of big constants into direct
use of smaller constants.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87166

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/combine-unmerge.mir

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