File: pr24287.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 (28 lines) | stat: -rw-r--r-- 790 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
 
/* { dg-do compile } */ 
/* { dg-options "-O2 -fdump-tree-optimized" } */
int g1(int);
int h(int *a, int *b)__attribute__((pure));
void link_error();

/* The calls to link_error should be eliminated, since nothing escapes to 
   non-pure functions.  */
int g(void)
{
  int t = 0, t1 = 2;
  /* ???  That's not true.  The pointers escape to the integer return
     value which we do not track in PTA.  */
  int t2 = h(&t, &t1);
  if (t != 0)
    link_error ();
  if (t1 != 2)
    link_error ();
  /* ???  And it would finally escape here even if we did.  */
  g1(t2);
  if (t != 0)
    link_error ();
  if (t1 != 2)
    link_error ();
  return t2 == 2;
}
/* We are allowed to optimize the first two link_error calls.  */
/* { dg-final { scan-tree-dump-times "link_error" 2 "optimized" } } */