https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110838
--- Comment #14 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Andre Simoes Dias Vieira <avie...@gcc.gnu.org>: https://gcc.gnu.org/g:d0eed43ff39a0bad4a02f8af7a4795e06aea6f80 commit r12-10294-gd0eed43ff39a0bad4a02f8af7a4795e06aea6f80 Author: Richard Biener <rguent...@suse.de> Date: Fri Aug 4 11:24:49 2023 +0200 tree-optimization/110838 - less aggressively fold out-of-bound shifts The following adjusts the shift simplification patterns to avoid touching out-of-bound shift value arithmetic right shifts of possibly negative values. While simplifying those to zero isn't wrong it's violating the principle of least surprise. PR tree-optimization/110838 * match.pd (([rl]shift @0 out-of-bounds) -> zero): Restrict the arithmetic right-shift case to non-negative operands. (cherry picked from commit 04aa0edcace22a7815cfc57575f1f7b1f166ac10)
