gcc/testsuite/gcc.dg/var-expand3.c

   1 /* { dg-do run { target { powerpc*-*-* && vmx_hw } } }} */
   2 /* { dg-options "-O2 -funroll-loops -ffast-math -fvariable-expansion-in-unroller -maltivec -fdump-rtl-loop2_unroll" } */
   3
   4 #include "altivec.h"
   5 extern void abort (void);
   6 extern void exit (int);
   7
   8 #define N 256
   9
  10 float in1[N] __attribute__ ((__aligned__ (16))) = {0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57};
  11 float in2[N] __attribute__ ((__aligned__ (16))) = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19};
  12
  13 float
  14 foo (int n)
  15 {
  16   unsigned i;
  17   vector float vp1, vp2, vp3, vaccum, vzero, vtmp;
  18   float accum = 1.0;
  19
  20   vzero = (vector float){0, 0, 0, 0};
  21
  22   vaccum = vzero;
  23
  24   for (i = 0; i < n; i++)
  25     {
  26       vp1 = vec_ld (i * 16, in1);
  27       vp2 = vec_ld (i * 16, in2);
  28
  29       vaccum = vec_madd (vp1, vp2, vaccum);
  30
  31     }
  32   vtmp = vec_sld (vaccum, vaccum, 8);
  33   vp1 = vec_add (vaccum, vtmp);
  34   vtmp = vec_sld (vp1, vp1, 4);
  35   vp2 = vec_add (vp1, vtmp);
  36
  37   vec_ste (vp2, 0, &accum);
  38   if (accum != 1518)
  39     return 0;
  40
  41   return accum;
  42 }
  43
  44 int
  45 main (void)
  46 {
  47   if (!foo (3))
  48     abort ();
  49
  50    exit (0);
  51 }
  52
  53 /* { dg-final { scan-rtl-dump "Expanding Accumulator" "loop2_unroll" } } */
  54 /* { dg-final { cleanup-rtl-dump "loop*" } } */
  55
  56
  57
  58