Viewing file:  ssa-pta-fn-1.c (1.11 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-fdump-tree-alias" } */
/* { dg-skip-if "" { *-*-* } { "-O0" "-fno-fat-lto-objects" } { "" } } */
extern void abort (void);
int *g;
int dummy;
int * __attribute__((noinline,const,noipa))
foo_const(int *p) { return p; }
int * __attribute__((noinline,pure,noipa))
foo_pure(int *p) { return p + dummy; }
int * __attribute__((noinline,noipa))
foo_normal(int *p) { g = p; return p; }
void test_const(void)
{
int i;
int *p = &i;
int *q_const = foo_const(p);
*p = 1;
*q_const = 2;
if (*p != 2)
abort ();
}
void test(void)
{
int i;
int *p = &i;
int *q_normal = foo_normal(p);
*p = 1;
*q_normal = 2;
if (*p != 2)
abort ();
}
void test_pure(void)
{
int i;
int *p = &i;
int *q_pure = foo_pure(p);
*p = 1;
*q_pure = 2;
if (*p != 2)
abort ();
}
int main()
{
test_const();
test();
test_pure();
return 0;
}
/* { dg-final { scan-tree-dump "q_const_. = { NONLOCAL i }" "alias" } } */
/* { dg-final { scan-tree-dump "q_pure_. = { ESCAPED NONLOCAL i }" "alias" } } */
/* { dg-final { scan-tree-dump "q_normal_. = { ESCAPED NONLOCAL i }" "alias" } } */
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