diff options
| author | Xi Ruoyao <xry111@xry111.site> | 2025-05-11 16:44:31 +0800 |
|---|---|---|
| committer | Xi Ruoyao <xry111@xry111.site> | 2025-06-10 12:09:14 +0800 |
| commit | ba729e217add91ac919c06a51f00145249fbeb4b (patch) | |
| tree | d8a47767b15d973a02325b976023095b2d06bdb4 /gcc/dwarf2ctf.cc | |
| parent | 62724eaf59b9a888cc27a4b1f9364ee4c5c5dbff (diff) | |
| download | gcc-ba729e217add91ac919c06a51f00145249fbeb4b.zip gcc-ba729e217add91ac919c06a51f00145249fbeb4b.tar.gz gcc-ba729e217add91ac919c06a51f00145249fbeb4b.tar.bz2 | |
ext-dce: Don't refine live width with SUBREG mode if !TRULY_NOOP_TRUNCATION_MODES_P [PR 120050]
If we see a promoted subreg and TRULY_NOOP_TRUNCATION says the
truncation is not a noop, then all bits of the inner reg are live. We
cannot reduce the live mask to that of the mode of the subreg.
gcc/ChangeLog:
PR rtl-optimization/120050
* ext-dce.cc (ext_dce_process_uses): Break early if a SUBREG in
rhs is promoted and the truncation from the inner mode to the
outer mode is not a noop when handling SETs.
(cherry picked from commit 65f3a439c4f76fe780a30ac66969f51035c4bf98)
Diffstat (limited to 'gcc/dwarf2ctf.cc')
0 files changed, 0 insertions, 0 deletions