[PATCH] D97890: [GlobalISel] Fold away G_BUILD_VECTOR with all elements extracted.
Amara Emerson via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Mar 3 15:00:05 PST 2021
aemerson created this revision.
aemerson added reviewers: arsenm, paquette.
aemerson added a project: LLVM.
Herald added subscribers: hiraditya, rovka.
aemerson requested review of this revision.
Herald added a subscriber: wdng.
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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