[llvm] [InstCombine] Optimize 'xor-and/or-select' sequence to 'or' for bool (PR #66394)
Bryan Chan via llvm-commits
llvm-commits at lists.llvm.org
Fri Sep 15 16:01:53 PDT 2023
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@@ -3112,6 +3112,26 @@ Instruction *InstCombinerImpl::foldSelectOfBools(SelectInst &SI) {
return SelectInst::Create(FalseVal, One, AndV);
}
+ // select (~b & a), a, b -> or a, b
+ // only for scalar types
+ if (match(CondVal, m_c_And(m_Not(m_Specific(FalseVal)), m_Specific(TrueVal))) &&
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bryanpkc wrote:
Correction: Both your patterns are more specific than the ones between lines 3089 and 3109. Move your code above those.
https://github.com/llvm/llvm-project/pull/66394
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