gcc/testsuite/gcc.target/i386/xop-rotate1-vector.c

   1 /* Test that the compiler properly optimizes vector rotate instructions vector
   2    into prot on XOP systems.  */
   3
   4 /* { dg-do compile { target { ! ia32 } } } */
   5 /* { dg-options "-O2 -mxop -mno-avx2 -ftree-vectorize" } */
   6
   7 extern void exit (int);
   8
   9 typedef long __m128i  __attribute__ ((__vector_size__ (16), __may_alias__));
  10
  11 #define SIZE 10240
  12
  13 union {
  14   __m128i i_align;
  15   unsigned u32[SIZE];
  16 } a, b, c;
  17
  18 void
  19 left_rotate32 (void)
  20 {
  21   int i;
  22
  23   for (i = 0; i < SIZE; i++)
  24     a.u32[i] = (b.u32[i] << ((sizeof (int) * 8) - 4)) | (b.u32[i] >> 4);
  25 }
  26
  27 int
  28 main ()
  29 {
  30   left_rotate32 ();
  31   exit (0);
  32 }
  33
  34 /* { dg-final { scan-assembler "vprotd" } } */