https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103345
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Roger Sayle <sa...@gcc.gnu.org>: https://gcc.gnu.org/g:a944b5dec3adb28ed199234d2116145ca9010d6a commit r12-5453-ga944b5dec3adb28ed199234d2116145ca9010d6a Author: Roger Sayle <ro...@nextmovesoftware.com> Date: Mon Nov 22 18:15:36 2021 +0000 tree-optimization/103345: Improved load merging. This patch implements PR tree-optimization/103345 to merge adjacent loads when combined with addition or bitwise xor. The current code in gimple-ssa-store-merging.c's find_bswap_or_nop alreay handles ior, so that all that's required is to treat PLUS_EXPR and BIT_XOR_EXPR in the same way at BIT_IOR_EXPR. Many thanks to Andrew Pinski for pointing out that this also resolves PR target/98953. 2021-11-22 Roger Sayle <ro...@nextmovesoftware.com> gcc/ChangeLog PR tree-optimization/98953 PR tree-optimization/103345 * gimple-ssa-store-merging.c (find_bswap_or_nop_1): Handle BIT_XOR_EXPR and PLUS_EXPR the same as BIT_IOR_EXPR. (pass_optimize_bswap::execute): Likewise. gcc/testsuite/ChangeLog PR tree-optimization/98953 PR tree-optimization/103345 * gcc.dg/tree-ssa/pr98953.c: New test case. * gcc.dg/tree-ssa/pr103345.c: New test case.
