Viewing file:  pr66444.c (1.41 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-O2 -fipa-ra" } */
extern void abort (void);
#if (__SIZEOF_LONG_LONG__ == __SIZEOF_POINTER__)
#define ADD_SUFFIX(a) a ## ULL
#elif (__SIZEOF_LONG__ == __SIZEOF_POINTER__)
#define ADD_SUFFIX(a) a ## UL
#elif (__SIZEOF_INT__ == __SIZEOF_POINTER__)
#define ADD_SUFFIX(a) a ## U
#else
#error Add target support here
#endif
#if __SIZEOF_POINTER__ <= 4
/* Use a 16 bit pointer to have a valid pointer for 16-bit to 31-bit pointer
architectures. Using sizeof, we cannot distinguish between 31-bit and 32-bit
pointer types, so we also handle the 32-bit pointer type case here. */
#define CONST_PTR ADD_SUFFIX (0x800)
#else
/* For x86_64 -m64, the problem reproduces with this 32-bit CONST_PTR, but not
with a 2-power below it. */
#define CONST_PTR ADD_SUFFIX (0x80000000)
#endif
int __attribute__((noinline, noclone))
bar (void)
{
return 1;
}
struct S
{
unsigned long p, q, r;
void *v;
};
struct S *s1;
struct S *s2;
void __attribute__((noinline, noclone))
fn2 (struct S *x)
{
s2 = x;
}
__attribute__((noinline, noclone)) void *
fn1 (struct S *x)
{
/* Just a statement to make it a non-const function. */
s1 = x;
return (void *)0;
}
int __attribute__((noinline, noclone))
baz (void)
{
struct S *x = (struct S *) CONST_PTR;
x += bar ();
fn1 (x);
fn2 (x);
return 0;
}
int
main (void)
{
baz ();
if (s2 != (((struct S *) CONST_PTR) + 1))
abort ();
return 0;
}
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