Viewing file:  builtin-snprintf-5.c (1.27 KB) -rw-r--r--
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/*
{ dg-do compile }
{ dg-options "-O2 -Wall -fdump-tree-optimized" } */
typedef __SIZE_TYPE__ size_t;
extern void abort (void);
extern int snprintf (char*, size_t, const char*, ...);
const char s0[] = "";
const char s1[] = "a";
const char s2[] = "ab";
extern char ax[];
extern const char* const ptr;
#define CAT(x, y) x ## y
#define CONCAT(x, y) CAT (x, y)
#define TEST CONCAT (test_on_line_, __LINE__)
#define KEEP(expr) do { \
if ((expr)) { \
extern void TEST (void); \
TEST (); \
} \
} while (0)
void test_literal (int i)
{
KEEP (0 < snprintf (0, 0, "%s", i ? "" : ax));
KEEP (1 < snprintf (0, 0, "%s", i ? ax : "1"));
KEEP (2 < snprintf (0, 0, "%s", i ? "12" : ptr));
KEEP (1 > snprintf (0, 0, "%s", i ? "" : ax));
KEEP (1 > snprintf (0, 0, "%s", i ? ax : "1"));
KEEP (2 > snprintf (0, 0, "%s", i ? "12" : ptr));
}
void test_cststr (int i)
{
KEEP (0 < snprintf (0, 0, "%s", i ? s0 : ax));
KEEP (1 < snprintf (0, 0, "%s", i ? ax : s1));
KEEP (2 < snprintf (0, 0, "%s", i ? s2 : ptr));
KEEP (1 > snprintf (0, 0, "%s", i ? s0 : ax));
KEEP (1 > snprintf (0, 0, "%s", i ? ax : s1));
KEEP (2 > snprintf (0, 0, "%s", i ? s2 : ptr));
}
/* { dg-final { scan-tree-dump-times "test_on_line_" 12 "optimized" } } */
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