File: pr79800.c

package info (click to toggle)
gcc-riscv64-unknown-elf 8.3.0.2019.08%2Bdfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 680,956 kB
  • sloc: ansic: 3,237,715; cpp: 896,882; ada: 772,854; f90: 144,254; asm: 68,788; makefile: 67,456; sh: 29,743; exp: 28,045; objc: 15,273; fortran: 11,885; python: 7,369; pascal: 5,375; awk: 3,725; perl: 2,872; yacc: 316; xml: 311; ml: 285; lex: 198; haskell: 122
file content (31 lines) | stat: -rw-r--r-- 529 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
/* PR 79800 - wrong snprintf result range with precision in a narrow
   negative-positive range
   { dg-do "run" { target c99_runtime } }
   { dg-options "-O2 -Wall" } */

#define FMT "%.*a"
char fmt[] = FMT;

volatile double x = 1.23456789;

void f (int p)
{
  if (p < -1 || 0 < p)
    p = -1;

  char d[30];
  int n1 = __builtin_sprintf (d, "%.*a", p, x);
  const char *s = n1 < 20 ? "< 20" : ">= 20";

  if (__builtin_strcmp (s, ">= 20"))
    __builtin_abort ();
}

volatile int i = -1;

int main ()
{
  f (i);

  return 0;
}