[Bug target/18665] -ftrapv borks up simple integer arithmetic

[steven at gcc dot gnu dot org]

------- Additional Comments From steven at gcc dot gnu dot org  2004-11-28 
00:22 -------
Much simpler test case: 
 
$ cat t.c 
extern int printf (__const char *__restrict __format, ...); 
 
int __attribute__ ((__noinline__)) 
foo (int a, int b) 
{ 
  return a - b; 
} 
 
int 
main (void) 
{ 
  printf ("%d\n", foo (2,3)); 
  return 0; 
} 
$ ../xgcc -B.. t.c 
$ ./a.out 
-1 
$ ../xgcc -B.. t.c -ftrapv 
$ ./a.out 
1073748906 
$ 
 
 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18665