[Bug tree-optimization/126486] codesize regression by 17.5% for spec2017 507.catcuBSSN_r caused by r15-6657 with O2
"liuhongt at gcc dot gnu.org via Gcc-bugs" <[email protected]>
| Newsgroups | gmane.comp.gcc.bugs |
|---|---|
| Message-ID | <[email protected]/bugzilla/> |
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126486 --- Comment #5 from Hongtao Liu <liuhongt at gcc dot gnu.org> --- The canonicalization in r15-6657 fold signed integer operation into unsigned, overflow for signed integer is UD, and can be simplied in tree-affine, but the later one can't, add -fwrapv can also reproduce the issue without r15-6657.