Viewing file:  Wstringop-overflow-57.c (1.78 KB) -rw-r--r--
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/* Verify that an anti-range ~[A, B] with small positive A and B
is handled correctly and doesn't trigger warnings.
{ dg-do compile }
{ dg-options "-O2 -Wall" }
{ dg-require-effective-target alloca } */
typedef __typeof__ (sizeof 0) size_t;
int f (void*, size_t);
int g (void*);
// Test case distilled from gcc/cp/semantics.c
int omp_reduction_id (int i, int j, const char *mm)
{
const char *p = 0;
const char *m = 0;
switch (i)
{
case 1:
p = "min";
break;
case 2:
p = "max";
break;
default:
break;
}
if (j)
m = mm;
const char prefix[] = "omp declare reduction ";
size_t lenp = sizeof (prefix);
if (__builtin_strncmp (p, prefix, lenp - 1) == 0)
lenp = 1;
size_t len = __builtin_strlen (p);
size_t lenm = m ? __builtin_strlen (m) + 1 : 0;
char *name = ((char *) __builtin_alloca(lenp + len + lenm));
if (lenp > 1)
__builtin_memcpy (name, prefix, lenp - 1);
__builtin_memcpy (name + lenp - 1, p, len + 1);
if (m)
{
name[lenp + len - 1] = '~';
__builtin_memcpy (name + lenp + len, m, lenm);
}
return (__builtin_constant_p (name)
? f (name, __builtin_strlen (name)) : g (name));
}
// Test case derived from gcc/d/dmd/root/filename.c.
const char *ext (const char *str)
{
size_t len = __builtin_strlen(str);
const char *e = str + len;
for (;;)
{
switch (*e)
{
case '.': return e + 1;
case '/': break;
default:
if (e == str)
break;
e--;
continue;
}
return 0;
}
}
const char *removeExt (const char *str)
{
const char *e = ext (str);
if (e)
{
size_t len = (e - str) - 1;
char *n = (char *)__builtin_malloc (len + 1);
__builtin_memcpy(n, str, len);
n[len] = 0;
return n;
}
return 0;
}
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