[Bug rtl-optimization/128545] New: clmul (n, -1) RTL could be improved to Clang

[kaelfandrew at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128545

            Bug ID: 128545
           Summary: clmul (n, -1) RTL could be improved to Clang
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kaelfandrew at gmail dot com
  Target Milestone: ---

Created attachment 66106
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=66106&action=edit
C code

https://godbolt.org/z/j8bzrf1dx

With -O2, GCC has less optimized clmul (n, -1) assembly than Clang in attached
testcase.