OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [testsuite/] [gcc.dg/] [sibcall-3.c] - Rev 154

Go to most recent revision | Compare with Previous | Blame | View Log

/* Simple check that sibling calls are performed from a
   void non-leaf-function taking one int argument calling a function which
   is about the same as itself.
 
   Copyright (C) 2002 Free Software Foundation Inc.
   Contributed by Hans-Peter Nilsson  <hp@bitrange.com>  */
 
/* { dg-do run { xfail arc-*-* avr-*-* c4x-*-* cris-*-* h8300-*-* hppa*64*-*-* m32r-*-* m68hc1?-*-* m681?-*-* m680*-*-* m68k-*-* mcore-*-* mn10300-*-* xstormy16-*-* v850*-*-* vax-*-* xtensa-*-* } } */
/* { dg-options "-O2 -foptimize-sibling-calls" } */
 
/* The option -foptimize-sibling-calls is the default, but serves as
   marker.  This test is xfailed on targets without sibcall patterns
   (except targets where the test does not work due to the return address
   not saved on the regular stack).  */
 
extern void abort (void);
extern void exit (int);
 
static void recurser_void1 (int);
static void recurser_void2 (int);
extern void track (int);
 
int main ()
{
  recurser_void1 (0);
  exit (0);
}
 
/* The functions should get the same stack-frame, and best way to make it
   reasonably sure is to make them have the same contents (regarding the
   n tests).  */
 
static void __attribute__((noinline))
recurser_void1 (int n)
{
  if (n == 0 || n == 7 || n == 8)
    track (n);
 
  if (n == 10)
    return;
 
  recurser_void2 (n + 1);
}
 
static void __attribute__((noinline))
recurser_void2 (int n)
{
  if (n == 0 || n == 7 || n == 8)
    track (n);
 
  if (n == 10)
    return;
 
  recurser_void1 (n + 1);
}
 
void *trackpoint;
 
void
track (int n)
{
  char stackpos[1];
 
  if (n == 0)
    trackpoint = stackpos;
  else if ((n != 7 && n != 8) || trackpoint != stackpos)
    abort ();
}
 

Go to most recent revision | Compare with Previous | Blame | View Log

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.