gcc-4.3.1/gcc/testsuite/gcc.dg/tree-ssa/pr30375.c

/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-dse" } */

typedef struct _s {
    int a;
    int b;
    int c;
    int d;
} s;

extern void g(s*);
extern void f(void);

void test_signed_msg_encoding(void)
{
    s signInfo = { sizeof(signInfo), 0 };

    signInfo.b = 1;
    signInfo.c = 0;
    g(&signInfo);
    signInfo.d = 0;
    f();
}

/* { dg-final { scan-tree-dump-times "signInfo = {};" 1 "dse1" } } */
/* { dg-final { cleanup-tree-dump "dse*" } } */