gcc/testsuite/gcc.dg/guality/pr90131.c

   1 /* { dg-do run } */
   2 /* { dg-options "-g" } */
   3
   4 void __attribute__((noinline))
   5 optimize_me_not ()
   6 {
   7   __asm__ volatile ("" : : : "memory");
   8 }
   9 volatile long a;
  10 int b[9][1];
  11 static short c[2][1] = {3};
  12 int main()
  13 {
  14   int i, d, e;
  15   i = 0;
  16   for (; i < 9; i++)
  17     a = b[i][0];
  18   i = 0;
  19   for (; i < 2; i++)
  20     {
  21       d = 0;
  22       for (; d < 1; d++)
  23         {
  24           e = 0;
  25           for (; e < 1; e++)
  26             a = c[i][e];
  27           /* i may very well be optimized out, so we cannot test for i == 0.
  28              Instead test i + 1 which will make the test UNSUPPORTED if i
  29              is optimized out.  Since the test previously had wrong debug
  30              with i == 9 this is acceptable.  */
  31           optimize_me_not(); /* { dg-final { gdb-test . "i + 1" "1" } } */
  32         }
  33     }
  34   return 0;
  35 }