Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/sibcall-2.c @ 111:04ced10e8804
gcc 7
author | kono |
---|---|
date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children |
line wrap: on
line source
/* Simple check that sibling calls are performed from a void non-leaf-function taking no arguments calling itself. Copyright (C) 2002 Free Software Foundation Inc. Contributed by Hans-Peter Nilsson <hp@bitrange.com> */ /* { dg-do run } */ /* { dg-options "-O2 -foptimize-sibling-calls" } */ /* The option -foptimize-sibling-calls is the default, but serves as marker. Self-recursion tail calls are optimized for all targets, regardless of presence of sibcall patterns. */ extern void abort (void); extern void exit (int); extern void recurser_void (void); extern void track (void); int n = 0; int main () { recurser_void (); exit (0); } void recurser_void (void) { if (n == 0 || n == 7) track (); if (n == 10) return; n++; recurser_void (); } void *trackpoint; void __attribute__ ((noinline)) track () { char stackpos[1]; if (n == 0) trackpoint = stackpos; else if (n != 7 || trackpoint != stackpos) abort (); }