bash-3.2$ cat g++.old-deja/g++.mike/warn1.C
// { dg-do assemble  }
// { dg-options "-Wall" }

typedef char * charptr;
typedef __SIZE_TYPE__ size_t;
char c[]={'A','B','C','D'};
int i=size_t(&c);
int *pp=&i;
void foo() { }
int main()
{
 charptr(*pp)++;        // { dg-warning "" } 
 return 0;
}
bash-3.2$ gcc -Wall -S -o /tmp/x.s g++.old-deja/g++.mike/warn1.C -m64
g++.old-deja/g++.mike/warn1.C: In function ‘int main()’:
g++.old-deja/g++.mike/warn1.C:12: warning: value computed is not used
bash-3.2$ gcc -Wall -S -o /tmp/x.s g++.old-deja/g++.mike/warn1.C -m32
g++.old-deja/g++.mike/warn1.C: In function ‘int main()’:
g++.old-deja/g++.mike/warn1.C:12: error: lvalue required as increment operand
bash-3.2$ 

On Linux/x86-64, I got

FAIL: g++.old-deja/g++.mike/warn1.C  (test for errors, line 12)
FAIL: g++.old-deja/g++.mike/warn1.C (test for excess errors)


-- 
           Summary: [4.4 Regression] Revision 140405 caused g++.old-
                    deja/g++.mike/warn1.C
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37561