[Bug tree-optimization/41460] New: value-numbering does not handle type-punning in a user-friendly way

[rguenth at gcc dot gnu dot org]

value-numbering could turn certain invalid constructs like

int b;
void f(void)
{
  float a;
  a = 1;
  b = *(int*)&a;
}

into VIEW_CONVERT_EXPRs of the loaded bit-pattern.


-- 
           Summary: value-numbering does not handle type-punning in a user-
                    friendly way
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41460