File: pr79327.c

package info (click to toggle)
gcc-arm-none-eabi 15%3A14.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,099,328 kB
  • sloc: cpp: 3,627,108; ansic: 2,571,498; ada: 834,230; f90: 235,082; makefile: 79,231; asm: 74,984; xml: 51,692; exp: 39,736; sh: 33,298; objc: 15,629; python: 15,069; fortran: 14,429; pascal: 7,003; awk: 5,070; perl: 3,106; ml: 285; lisp: 253; lex: 204; haskell: 135
file content (31 lines) | stat: -rw-r--r-- 745 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 tree-optimization/79327 - wrong code at -O2 and -fprintf-return-value
   { dg-do run }
   { dg-options "-O2 -Wall" }  */

volatile int a, b = -1;
char buf[64];

#define FMT "%+03d%02d"
const char *volatile fmt = FMT;

int main ()
{
  int c = a;
  int d = b;
  if (c >= -35791395 && c < 35791394 && d >= -1 && d < __INT_MAX__)
    {
      /* In the following the range of return values can be computed
	 by GCC. */
      int n1 = __builtin_sprintf (buf, FMT, c + 1, d + 1);
      if (n1 > 7)
	__builtin_abort ();

      /* Here GCC can't see the format string so the return value
	 must be computed by a libc call.  */
      int n2 = __builtin_sprintf (buf, fmt, c + 1, d + 1);

      if (n1 != n2)
	__builtin_abort ();
    }
  return 0;
}