[Bug tree-optimization/127042] [17 Regression] widening mul synthesis generates arithmetic for a result known at compile time

[konstantinos.eleftheriou at vrull dot eu via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127042

--- Comment #2 from Konstantinos Eleftheriou <konstantinos.eleftheriou at vrull 
dot eu> ---
Submitted a fix:
https://gcc.gnu.org/pipermail/gcc-patches/2026-August/729013.html