Viewing file:  builtin-memchr-2.c (1.18 KB) -rw-r--r--
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/* Verify that memchr calls with the address of a constant character
are folded as expected even at -O0.
{ dg-do compile }
{ dg-options "-O0 -Wall -fdump-tree-gimple" } */
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 nul = 0;
const char cha = 'a';
const struct
{
char c;
} snul = { 0 },
schb = { 'b' },
sarr[] = {
{ 0 },
{ 'c' }
};
void test_memchr_cst_char (void)
{
A (&nul == memchr (&nul, 0, 1));
A (!memchr (&nul, 'a', 1));
A (&cha == memchr (&cha, 'a', 1));
A (!memchr (&cha, 0, 1));
A (&snul.c == memchr (&snul.c, 0, 1));
A (!memchr (&snul.c, 'a', 1));
A (&schb.c == memchr (&schb.c, 'b', 1));
A (!memchr (&schb.c, 0, 1));
A (&sarr[0].c == memchr (&sarr[0].c, 0, 1));
A (!memchr (&sarr[0].c, 'a', 1));
A (&sarr[1].c == memchr (&sarr[1].c, 'c', 1));
A (!memchr (&sarr[1].c, 0, 1));
}
/* { dg-final { scan-tree-dump-not "abort" "gimple" } } */
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