[PATCH] D84948: [InstCombine] Fold select/and/or with freeze(undef) that is used in the op only
Juneyoung Lee via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Jul 30 07:17:07 PDT 2020
aqjune created this revision.
aqjune added reviewers: spatel, lebedev.ri, nikic.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.
aqjune requested review of this revision.
This is a simple patch that folds select/and/ors having freeze(undef) as an
operand. For select, the case when it is used at its condition is considered only.
It is fired only when freeze(undef) has only one use.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D84948
Files:
llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
llvm/test/Transforms/InstCombine/and.ll
llvm/test/Transforms/InstCombine/or.ll
llvm/test/Transforms/InstCombine/select.ll
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