https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115877
--- Comment #10 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jeff Law <l...@gcc.gnu.org>: https://gcc.gnu.org/g:9d8ef2711dfecd093077aef6123d9e93ea23454e commit r15-2186-g9d8ef2711dfecd093077aef6123d9e93ea23454e Author: Jeff Law <j...@ventanamicro.com> Date: Sun Jul 21 08:41:28 2024 -0600 [PR rtl-optimization/115877][2/n] Improve liveness computation for constant initialization While debugging pr115877, I noticed we were failing to remove the destination register from LIVENOW bitmap when it was set to a constant value. ie (set (dest) (const_int)). This was a trivial oversight in safe_for_live_propagation. I don't have an example of this affecting code generation, but it certainly could. More importantly, by making LIVENOW more accurate it's easier to debug when LIVENOW differs from expectations. As with the prior patch this has been tested as part of a larger patchset with the crosses as well as individually on x86_64. Pushing to the trunk, PR rtl-optimization/115877 gcc/ * ext-dce.cc (safe_for_live_propagation): Handle RTX_CONST_OBJ.
