[Bug tree-optimization/112723] [11/12/13/14 Regression] Missed optimization for invariants 'c+c' when c += -2147483647-1 and c is a global variable

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112723

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, with -fwrapv.  Without -fwrapv the testcase invokes UB always, either the
first c + c overflows or the second one, or the c += -2147483647 - 1;
overflows.