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/* PR tree-optimization/79691 - -Wformat-truncation suppressed by
(and only by) -Og
{ dg-do compile }
{ dg-options "-Og -Wall -fdump-tree-optimized" } */
char d[2];
/* Verify -Wformat-overflow works. */
void f1 (void)
{
__builtin_sprintf (d, "%i", 123); /* { dg-warning "directive writing 3 bytes" } */
}
/* Verify -Wformat-truncation works. */
void f2 (void)
{
__builtin_snprintf (d, sizeof d, "%i", 1234); /* { dg-warning "output truncated writing 4 bytes" } */
}
/* Verify -fprintf-return-value works. */
int f3 (void)
{
return __builtin_snprintf (0, 0, "%i", 12345);
}
/* Verify -fprintf-return-value results used for constant propagation. */
int f4 (int i)
{
int n1 = __builtin_snprintf (0, 0, "%i", 1234);
int n2 = __builtin_snprintf (0, 0, "%i", 12345);
return n1 + n2;
}
/* { dg-final { scan-tree-dump-times "sprintf" 1 "optimized" } }
{ dg-final { scan-tree-dump-times "snprintf" 1 "optimized" } }
{ dg-final { scan-tree-dump " = 9;" "optimized" } } */
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