File: safe-indirect-jump-2.c

package info (click to toggle)
gcc-arm-none-eabi 15%3A12.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 959,712 kB
  • sloc: cpp: 3,275,382; ansic: 2,061,766; ada: 840,956; f90: 208,513; makefile: 76,132; asm: 73,433; xml: 50,448; exp: 34,146; sh: 32,436; objc: 15,637; fortran: 14,012; python: 11,991; pascal: 6,787; awk: 4,779; perl: 3,054; yacc: 338; ml: 285; lex: 201; haskell: 122
file content (32 lines) | stat: -rw-r--r-- 635 bytes parent folder | download | duplicates (2) 
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
32
 
/* { dg-do compile } */
/* { dg-options "-mno-speculate-indirect-jumps" } */
/* { dg-warning "'-mno-speculate-indirect-jumps' is deprecated" "" { target *-*-* } 0 } */

/* Test for deliberate misprediction of computed goto.  */

int bar (int);
int baz (int);
int spaz (int);

int foo (int x)
{
  static void *labptr[] = { &&lab0, &&lab1, &&lab2 };

  if (x < 0 || x > 2)
    return -1;

  goto *labptr[x];

 lab0:
  return bar (x);

 lab1:
  return baz (x) + 1;

 lab2:
  return spaz (x) / 2;
}

/* { dg-final { scan-assembler "crset" } } */
/* { dg-final { scan-assembler "beqctr-" } } */
/* { dg-final { scan-assembler {b \$} } } */