gdb/testsuite/gdb.base/vla-optimized-out.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2018 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 int __attribute__((noinline, noclone))
  19 f1 (int i)
  20 {
  21   char a[i + 1];
  22   a[0] = 5;
  23   return a[0];
  24 }
  25
  26 int
  27 main (void)
  28 {
  29   volatile int j;
  30   int i = 5;
  31   asm volatile ("" : "=r" (i) : "0" (i));
  32   j = f1 (i);
  33   return 0;
  34 }