[Bug tree-optimization/105142] [12 Regression] Wrong code with -O2 since r12-2591

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105142

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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  Attachment #52744|0                           |1
        is obsolete|                            |

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 52746
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52746&action=edit
patch to rewrite undefined overflow stmts

Fixed patch #1 (doesn't fix this testcase).  Bootstrapped/tested OK on x86_64,
I'm queuing this for stage1 for now.