[Bug c/39464] New: [4.2/4.3/4.4 Regression] Attribute may_alias causes invalid warning

[rguenth at gcc dot gnu dot org]

typedef int myint __attribute__((may_alias));

int foo(void *p)
{
  myint *q = (int *)p;
  return *q;
}

gcc -S t.c -Wall -O2
t.c: In function ‘foo’:
t.c:5: warning: pointer targets in initialization differ in signedness


-- 
           Summary: [4.2/4.3/4.4 Regression] Attribute may_alias causes
                    invalid warning
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: c
        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=39464