gcc/testsuite/gcc.dg/complex-5.c

   1 /* PR middle-end/33088 */
   2 /* Origin: Joseph S. Myers <jsm28@gcc.gnu.org> */
   3
   4 /* { dg-do run { target i?86-*-linux* x86_64-*-linux* } } */
   5 /* { dg-options "-std=c99 -O -ffloat-store -lm" } */
   6
   7 #include <fenv.h>
   8 #include <stdlib.h>
   9
  10 volatile int x[1024];
  11
  12 void __attribute__((noinline))
  13 fill_stack (void)
  14 {
  15   volatile int y[1024];
  16   int i;
  17   for (i = 0; i < 1024; i++)
  18     y[i] = 0x7ff00000;
  19   for (i = 0; i < 1024; i++)
  20     x[i] = y[i];
  21 }
  22
  23 volatile _Complex double vc;
  24
  25 void __attribute__((noinline))
  26 use_complex (_Complex double c)
  27 {
  28   vc = c;
  29 }
  30
  31 double t0, t1, t2, t3;
  32
  33 #define USE_COMPLEX(X, R, C) \
  34   do { __real__ X = R; __imag__ X = C; use_complex (X); } while (0)
  35
  36 void __attribute__((noinline))
  37 use_stack (void)
  38 {
  39   _Complex double a, b, c, d;
  40   USE_COMPLEX (a, t0, t1);
  41   USE_COMPLEX (b, t1, t2);
  42   USE_COMPLEX (c, t2, t3);
  43   USE_COMPLEX (d, t3, t0);
  44 }
  45
  46 int
  47 main (void)
  48 {
  49   fill_stack ();
  50   feclearexcept (FE_INVALID);
  51   use_stack ();
  52   if (fetestexcept (FE_INVALID))
  53     abort ();
  54   exit (0);
  55 }