iftrap-2.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

/* Verify that we optimize to conditional traps.  */
/* { dg-options "-O" } */
/* { dg-do compile { target rs6000-*-* powerpc-*-* sparc*-*-* ia64-*-* } } */
/* { dg-final { scan-assembler-not "^\t(trap|ta|break)\[ \t\]" } } */

void f1(int p)
{
  if (p)
    __builtin_trap();
  else
    abort();
}

void f2(int p)
{
  if (p)
    abort();
  else
    __builtin_trap();
}