[Bug tree-optimization/102232] Missed arithmetic fold

[llvm at rifkin dot dev via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102232

--- Comment #1 from Jeremy R. <llvm at rifkin dot dev> ---
Correction on first line: *GCC optimizes bar into tgt here but not foo.
Pardon my sloppy copy-paste from my bug report over on LLVM's bugzilla!