gcc/testsuite/gcc.dg/vect/pr66623.c

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include "tree-vect.h"
   4
   5 extern void abort (void);
   6
   7 #define OP *
   8 #define INIT 1.0
   9
  10 float __attribute__((noinline,noclone))
  11 foo (float *__restrict__ i)
  12 {
  13   float l = INIT;
  14   int a;
  15   int b;
  16
  17   for (a = 0; a < 4; a++)
  18     for (b = 0; b < 4; b++)
  19       l = l OP i[b];
  20
  21   return l;
  22 }
  23
  24 float __attribute__((noinline,noclone))
  25 foo_ref (float *__restrict__ i)
  26 {
  27   float l = INIT;
  28
  29   l = l OP i[0];
  30   l = l OP i[1];
  31   l = l OP i[2];
  32   l = l OP i[3];
  33
  34   l = l OP i[0];
  35   l = l OP i[1];
  36   l = l OP i[2];
  37   l = l OP i[3];
  38
  39   l = l OP i[0];
  40   l = l OP i[1];
  41   l = l OP i[2];
  42   l = l OP i[3];
  43
  44   l = l OP i[0];
  45   l = l OP i[1];
  46   l = l OP i[2];
  47   l = l OP i[3];
  48
  49   return l;
  50 }
  51
  52 union u
  53 {
  54   float f;
  55   unsigned int u;
  56 };
  57
  58 int
  59 main (void)
  60 {
  61   union u res, res2;
  62   float a[4];
  63
  64   if (sizeof (float) != sizeof (unsigned int))
  65     return 0;
  66
  67   check_vect ();
  68
  69   a[0] = 0.01;
  70   a[1] = 0.01;
  71   a[2] = 0.01;
  72   a[3] = 1.0;
  73
  74   res.f = foo_ref (a);
  75
  76   res2.f = foo (a);
  77
  78   if (res.u != res2.u)
  79     abort ();
  80
  81   return 0;
  82 }
  83
  84 /* need -ffast-math to vectorize this loop.  */
  85 /* ARM NEON passes -ffast-math to these tests, so expect this to fail.  */
  86 /* { dg-final { scan-tree-dump-times "vectorized 0 loops" 1 "vect" { xfail arm_neon_ok } } } */