[PATCH] D97890: [GlobalISel] Fold away G_BUILD_VECTOR with all elements extracted.

[Amara Emerson via Phabricator via llvm-commits]

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If every element is extracted from a G_BUILD_VECTOR, pass through the source registers. This is different to the extract(build_vector) combine because this one tolerates multiple users as long as they're exhaustive.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D97890

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-build-vector.mir

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