gcc/testsuite/gcc.target/i386/sse5-rotate2-vector.c

   1 /* Test that the compiler properly optimizes vector rotate instructions vector
   2    into prot on SSE5 systems.  */
   3
   4 /* { dg-do compile } */
   5 /* { dg-require-effective-target lp64 } */
   6 /* { dg-options "-O2 -msse5 -ftree-vectorize" } */
   7
   8 extern void exit (int);
   9
  10 typedef long __m128i  __attribute__ ((__vector_size__ (16), __may_alias__));
  11
  12 #define SIZE 10240
  13
  14 union {
  15   __m128i i_align;
  16   unsigned u32[SIZE];
  17 } a, b, c;
  18
  19 void
  20 right_rotate32_b (void)
  21 {
  22   int i;
  23
  24   for (i = 0; i < SIZE; i++)
  25     a.u32[i] = (b.u32[i] >> ((sizeof (int) * 8) - 4)) | (b.u32[i] << 4);
  26 }
  27
  28 int
  29 main ()
  30 {
  31   right_rotate ();
  32   exit (0);
  33 }
  34
  35 /* { dg-final { scan-assembler "prot" } } */