[Bug c/33711] New: Missed optimization: reduction by subtraction (vectorizer)

[eres at il dot ibm dot com]

For example:

   for (i = 0; i < N; i++) {
     udiff -= (ub[i] * uc[i]);


-- 
           Summary: Missed optimization: reduction by subtraction
                    (vectorizer)
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: eres at il dot ibm dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33711