[all-commits] [llvm/llvm-project] 60f2c6: [PatternMatch] allow intrinsic form of min/max wit...
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Thu Aug 6 07:53:09 PDT 2020
Branch: refs/heads/master
Home: https://github.com/llvm/llvm-project
Commit: 60f2c6a94cdff51fb8906030bbb73ba1c90da1c4
https://github.com/llvm/llvm-project/commit/60f2c6a94cdff51fb8906030bbb73ba1c90da1c4
Author: Sanjay Patel <spatel at rotateright.com>
Date: 2020-08-06 (Thu, 06 Aug 2020)
Changed paths:
M llvm/include/llvm/IR/PatternMatch.h
M llvm/test/Transforms/InstSimplify/maxmin_intrinsics.ll
M llvm/unittests/IR/PatternMatch.cpp
Log Message:
-----------
[PatternMatch] allow intrinsic form of min/max with existing matchers
I skimmed the existing users of these matchers and don't see any problems
(eg, the caller assumes the matched value was a select instruction without checking).
So I think we can generalize the matching to allow the new intrinsics or the cmp+select idioms.
I did not find any unit tests for the matchers, so added some basics there. The instsimplify
tests are adapted from existing tests for the cmp+select pattern and cover the folds in
simplifyICmpWithMinMax().
Differential Revision: https://reviews.llvm.org/D85230
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