[Bug tree-optimization/98602] New: Failure to optimise vector “x > -100 ? x : -100” to MAX_EXPR

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98602

            Bug ID: 98602
           Summary: Failure to optimise vector “x > -100 ? x : -100” to
                    MAX_EXPR
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rsandifo at gcc dot gnu.org
  Target Milestone: ---

We don't fold:

  typedef int v4si __attribute__ ((vector_size(16)));
  v4si f (v4si x) { return x > -100 ? x : -100; }

to a MAX_EXPR, even though we do if -100 is replaced with a
nonnegative constant or a variable.  This may be related to
the remaining part of PR95906.