[Bug tree-optimization/126262] wrong code with large _BitInt() and __builtin_mul_overflow() at -O2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126262

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 65055
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65055&action=edit
gcc17-pr126262.patch

Untested fix.