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

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2018-2021 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 /* The version of this test-case with f1 tagged with noinline only is equivalent
  19    to gcc/testsuite/gcc.dg/guality/vla-1.c.  */
  20
  21 #include "../lib/attributes.h"
  22
  23 int
  24 #ifdef NOCLONE
  25 __attribute__((noinline,weak)) ATTRIBUTE_NOCLONE
  26 #else
  27 __attribute__((noinline,weak))
  28 #endif
  29 f1 (int i)
  30 {
  31   char a[i + 1];
  32   a[0] = 5;
  33   return a[0];
  34 }
  35
  36 int
  37 main (void)
  38 {
  39   volatile int j;
  40   int i = 5;
  41   asm volatile ("" : "=r" (i) : "0" (i));
  42   j = f1 (i);
  43   return 0;
  44 }