https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113915
--- Comment #14 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Wilco Dijkstra <wi...@gcc.gnu.org>: https://gcc.gnu.org/g:b575f37a342cebb954aa85fa45df0604bfa1ada9 commit r14-9343-gb575f37a342cebb954aa85fa45df0604bfa1ada9 Author: Wilco Dijkstra <wilco.dijks...@arm.com> Date: Wed Mar 6 17:35:16 2024 +0000 ARM: Fix conditional execution [PR113915] By default most patterns can be conditionalized on Arm targets. However Thumb-2 predication requires the "predicable" attribute be explicitly set to "yes". Most patterns are shared between Arm and Thumb(-2) and are marked with "predicable". Given this sharing, it does not make sense to use a different default for Arm. So only consider conditional execution of instructions that have the predicable attribute set to yes. This ensures that patterns not explicitly marked as such are never conditionally executed. gcc/ChangeLog: PR target/113915 * config/arm/arm.md (NOCOND): Improve comment. (arm_rev*) Add predicable. * config/arm/arm.cc (arm_final_prescan_insn): Add check for PREDICABLE_YES. gcc/testsuite/ChangeLog: PR target/113915 * gcc.target/arm/builtin-bswap-1.c: Fix test to allow conditional execution both for Arm and Thumb-2.
