https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100864
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Andrew Pinski <pins...@gcc.gnu.org>: https://gcc.gnu.org/g:b9237226fdc9387bccf584a811b30c5d3689ffd2 commit r14-2885-gb9237226fdc9387bccf584a811b30c5d3689ffd2 Author: Andrew Pinski <apin...@marvell.com> Date: Fri Jul 28 20:27:03 2023 -0700 tree-optimization: [PR100864] `(a&!b) | b` is not opimized to `a | b` for comparisons This is a new version of the patch. Instead of doing the matching of inversion comparison directly inside match, creating a new function (bitwise_inverted_equal_p) to do it. It is very similar to bitwise_equal_p that was added in r14-2751-g2a3556376c69a1fb but instead it says `expr1 == ~expr2`. A follow on patch, will use this function in other patterns where we try to match `@0` and `(bit_not @0)`. Changed the name bitwise_not_equal_p to bitwise_inverted_equal_p. Committed as approved after a Bootstrapped and test on x86_64-linux-gnu with no regressions. PR tree-optimization/100864 gcc/ChangeLog: * generic-match-head.cc (bitwise_inverted_equal_p): New function. * gimple-match-head.cc (bitwise_inverted_equal_p): New macro. (gimple_bitwise_inverted_equal_p): New function. * match.pd ((~x | y) & x): Use bitwise_inverted_equal_p instead of direct matching bit_not. gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/bitops-3.c: New test.
