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/* PR middle-end/78476 - snprintf(0, 0, ...) with known arguments not
optimized away
{ dg-do compile }
{ dg-options "-O2 -fdump-tree-optimized" }
{ dg-require-effective-target int32plus } */
#define CAT(s, n) s ## n
#define FAIL(line) CAT (failure_on_line_, line)
#define PASS(line) CAT (success_on_line_, line)
/* Emit a call to a function named failure_on_line_NNN when VALUE
is not equal to the constant EXPECTED, otherwise emit a call to
function success_on_line_NNN. */
#define ASSERT(value, expected) \
do { \
extern void FAIL (__LINE__)(int); \
extern void PASS (__LINE__)(int); \
if (value == expected) \
PASS (__LINE__)(value); \
else \
FAIL (__LINE__)(value); \
} while (0)
/* Verify that EXPECT == snprintf(0, 0, ...). */
#define EQL(expect, ...) \
do { \
int n = __builtin_snprintf (0, 0, __VA_ARGS__); \
ASSERT (n, expect); \
} while (0)
static int ival (int i) { return i; }
/* Generate a signed int value in the specified range. */
static int
int_range (int min, int max)
{
extern int int_value (void);
int val = int_value ();
if (val < min || max < val)
val = min;
return val;
}
#define R(min, max) int_range (min, max)
void test_arg_int (int i, int n)
{
EQL (1, "%i", ival (0));
EQL (1, "%i", ival (1));
EQL (2, "%i%i", ival (0), ival (1));
EQL (3, "%i%i%i", ival (0), ival (1), ival (9));
EQL (5, "%i %i %i", ival (0), ival (1), ival (9));
EQL (5, "%i %i %i", ival (0), ival (1), ival (9));
EQL (13, "%hhu.%hhu.%hhu.%hhu", ival (23), ival (78), ival (216), ival (135));
for (i = 0; i != 9; ++i)
EQL (1, "%i", i);
for (i = -n; i != n; ++i)
EQL (8, "%08x", i);
/* As a special case, a precision of zero with an argument of zero
results in zero bytes (unless modified by width). */
EQL (0, "%.0d", ival (0));
EQL (0, "%.0i", ival (0));
EQL (0, "%.0o", ival (0));
EQL (0, "%.0u", ival (0));
EQL (0, "%.0x", ival (0));
EQL (0, "%.*d", 0, ival (0));
EQL (0, "%.*i", 0, ival (0));
EQL (0, "%.*o", 0, ival (0));
EQL (0, "%.*u", 0, ival (0));
EQL (0, "%.*x", 0, ival (0));
EQL (1, "%1.0d", ival (0));
EQL (1, "%1.0i", ival (0));
EQL (1, "%1.0o", ival (0));
EQL (1, "%1.0u", ival (0));
EQL (1, "%1.0x", ival (0));
EQL (4, "%hhi", R (-128, -127));
EQL (3, "%hhi", R ( -99, -10));
EQL (2, "%hhi", R ( -9, -1));
EQL (1, "%hhi", R ( 0, 9));
EQL (1, "%hhi", R ( 0, 9));
EQL (1, "%1.0hhi", R ( 0, 1));
EQL (1, "%1.1hhi", R ( 0, 9));
EQL (2, "%1.2hhi", R ( 0, 9));
EQL (3, "%1.3hhi", R ( 0, 9));
EQL (1, "%hhi", R (1024, 1033));
EQL (2, "%hhi", R (1034, 1123));
EQL (1, "%hhu", R (1024, 1033));
EQL (2, "%hhu", R (1034, 1123));
}
void test_arg_string (const char *s)
{
EQL ( 0, "%-s", "");
EQL ( 1, "%%");
EQL ( 1, "%-s", "1");
EQL ( 2, "%-s", "12");
EQL ( 3, "%-s", "123");
EQL ( 5, "s=%s", "123");
EQL (10, "%%s=\"%s\"", "12345");
EQL ( 1, "%.*s", 1, "123");
EQL ( 2, "%.*s", 2, "123");
EQL ( 3, "%.*s", 3, "123");
EQL ( 3, "%.*s", 4, "123");
EQL ( 1, "%1.*s", 1, "123");
EQL ( 2, "%1.*s", 2, "123");
EQL ( 3, "%1.*s", 3, "123");
EQL ( 3, "%1.*s", 4, "123");
EQL ( 4, "%4.*s", 1, "123");
EQL ( 4, "%4.*s", 2, "123");
EQL ( 4, "%4.*s", 3, "123");
EQL ( 4, "%4.*s", 4, "123");
EQL ( 4, "%4.*s", 5, "123");
const char *a = "123";
const char *b = "456";
EQL ( 3, "%-s", s ? a : b);
EQL ( 0, "%.0s", s);
EQL ( 1, "%1.1s", s);
EQL ( 2, "%2.2s", s);
EQL ( 2, "%2.1s", s);
}
void test_arg_multiarg (int i, double d)
{
EQL (16, "%12i %s", i, "abc");
EQL (16, "%*i %s", 12, i, "abc");
}
/* Verify that EXPECT == vsnprintf(0, 0, ...). */
#define EQLv(expect, fmt, va) \
do { \
int n = __builtin_vsnprintf (0, 0, fmt, va); \
ASSERT (n, expect); \
} while (0)
void test_va_int (__builtin_va_list va)
{
EQLv ( 2, "%02hhx", va);
EQLv ( 4, "%04hx", va);
}
void test_va_multiarg (__builtin_va_list va)
{
EQLv ( 8, "%8x", va);
EQLv ( 8, "% 8x", va);
EQLv ( 9, "%9x", va);
EQLv (11, "%11o", va);
EQLv (12, "%12o", va);
EQLv (16, "%12i %3.2s", va);
}
/* { dg-final { scan-tree-dump-not "failure_on_line" "optimized"} }
{ dg-final { scan-tree-dump-not "snprintf" "optimized"} } */
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