Viewing file:  builtin-memchr-4.c (1.01 KB) -rw-r--r--
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/* PR tree-optimization/89772
Verify that memchr calls with a pointer to a constant character
are folded as expected.
{ dg-do compile }
{ dg-options "-O1 -Wall -fdump-tree-release_ssa" } */
typedef __SIZE_TYPE__ size_t;
typedef __WCHAR_TYPE__ wchar_t;
extern void* memchr (const void*, int, size_t);
extern int printf (const char*, ...);
extern void abort (void);
#define A(expr) \
((expr) \
? (void)0 \
: (printf ("assertion failed on line %i: %s\n", \
__LINE__, #expr), \
abort ()))
const char a[8] = {'a',0,'b'};
const char b[3] = {'a','b'};
const char c[8] = {'a','b','c'};
void test_memchr_cst_char (void)
{
A (!memchr (a, 'c', 2));
A (!memchr (a, 'c', 5));
A (!memchr (a, 'c', sizeof a));
A (&a[1] == memchr (a, 0, sizeof a));
A (!memchr (b, 0, 2));
A (&b[2] == memchr (b, 0, sizeof b));
A (!memchr (c, 0, 2));
A (&c[3] == memchr (c, 0, 4));
A (&c[3] == memchr (c, 0, sizeof a));
}
/* { dg-final { scan-tree-dump-not "abort" "release_ssa" } } */
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