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vla-optimized-out.c revision 1.1.1.2 
      1 /* This testcase is part of GDB, the GNU debugger.
      2 
      3    Copyright 2018-2020 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 int
     22 #ifdef NOCLONE
     23 __attribute__((noinline, noclone))
     24 #else
     25 __attribute__((noinline))
     26 #endif
     27 f1 (int i)
     28 {
     29   char a[i + 1];
     30   a[0] = 5;
     31   return a[0];
     32 }
     33 
     34 int
     35 main (void)
     36 {
     37   volatile int j;
     38   int i = 5;
     39   asm volatile ("" : "=r" (i) : "0" (i));
     40   j = f1 (i);
     41   return 0;
     42 }
     43