[Bug tree-optimization/128166] New: (truncate)((extend)a * (extend)b) -> a * b

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128166

            Bug ID: 128166
           Summary: (truncate)((extend)a * (extend)b) -> a * b
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Created attachment 65957
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65957&action=edit
testcase

This testcase is not optimized on the gimple level and sometimes not optimized
on the RTL level (see PR 113560).