[Bug middle-end/105984] [13 Regression] wrong code with __builtin_mul_overflow_p() at -O1

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105984

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 53143
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53143&action=edit
gcc13-pr105984.patch

Untested fix.