[Bug tree-optimization/119917] [Optimization Opportunity] Inefficient code generation for multiplication overflow detection with explicit zero checks

[a1343922569 at outlook dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119917

--- Comment #4 from Jin Haobo <a1343922569 at outlook dot com> ---
The latest clang (trunk version) has applied this optimization, including
8/16/32/64-bit situation.
Link: https://godbolt.org/z/aTbqGTPex