gcc/testsuite/gcc.dg/vect/bb-slp-pow-1.c

   1 /* { dg-additional-options "-fno-math-errno -fdisable-tree-sincos" } */
   2 /* { dg-require-effective-target vect_float } */
   3
   4 void __attribute__ ((noipa))
   5 f (float *a)
   6 {
   7   a[0] = a[0] * a[0];
   8   a[1] = __builtin_powf (a[1], 2);
   9   a[2] = a[2] * a[2];
  10   a[3] = __builtin_powf (a[3], 2);
  11 }
  12
  13 float a[4] = { 1, 2, 3, 4 };
  14
  15 int
  16 main (void)
  17 {
  18   f (a);
  19 #pragma GCC novector
  20   for (int i = 0; i < 4; ++i)
  21     {
  22       if (a[i] != (i + 1) * (i + 1))
  23         __builtin_abort ();
  24       asm volatile ("" ::: "memory");
  25     }
  26   return 0;
  27 }
  28
  29 /* On older powerpc hardware (POWER7 and earlier), the default flag
  30    -mno-allow-movmisalign prevents vectorization.  On POWER8 and later,
  31    when vect_hw_misalign is true, vectorization occurs.  */
  32
  33 /* { dg-final { scan-tree-dump-times "optimized: basic block" 1 "slp2" { target {{ ! powerpc*-*-* } || { powerpc*-*-* && vect_hw_misalign }} } } } */