On 12/31/23 21:03, Andrew Pinski wrote:
For boolean types, `a ^ b` is a valid form for `a != b`. This means for gimple_bitwise_inverted_equal_p, we catch some inverted value forms. This patch extends inverted_equal_p to allow matching of `^` with the corresponding `==`. Note in the testcase provided we used to optimize in GCC 12 to just `return 0` where `a == b` was used, this allows us to do that again. Bootstrapped and tested on x86_64-linux-gnu with no regressions. PR tree-optimized/113186 gcc/ChangeLog: * gimple-match-head.cc (gimple_bitwise_inverted_equal_p): Match `^` with the `==` for 1bit integral types. * match.pd (maybe_cmp): Allow for bit_xor for 1bit integral types. gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/bitops-bool-1.c: New test.
OK jeff