[Bug tree-optimization/98774] gcc -O3 does not vectorize some operations

[vanyacpp at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98774

--- Comment #4 from Ivan Sorokin <vanyacpp at gmail dot com> ---
I retested the sample on GCC 11.2.

https://godbolt.org/z/xrarP3zbY

Compared to Clang 12.0.1 GCC still generates 6 more instructions in total and
does 6 mulpd against Clang's 4 mulpd.