[Bug target/122529] Optimizing for size --- unnecessary x86 instructions

[zero at smallinteger dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122529

--- Comment #3 from zero at smallinteger dot com ---
FYI, circumstantial evidence with gcc 12.3.0 suggests that adding -fweb after
-Oz can eliminate unnecessary instructions.