gcc/testsuite/gcc.target/powerpc/versioned-copy-loop.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target powerpc_p8vector_ok } */
   3 /* { dg-options "-O3 -fdump-tree-vect-details" } */
   4
   5 /* Verify that a pure copy loop with a vectorization factor of two
   6    that requires alignment will not be vectorized.  See the cost
   7    model hooks in rs6000.c.  */
   8
   9 typedef long unsigned int size_t;
  10 typedef unsigned char uint8_t;
  11
  12 extern void *memcpy (void *__restrict __dest, const void *__restrict __src,
  13        size_t __n) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__nonnull__ (1, 2)));
  14
  15 void foo (void *dstPtr, const void *srcPtr, void *dstEnd)
  16 {
  17     uint8_t *d = (uint8_t*)dstPtr;
  18     const uint8_t *s = (const uint8_t*)srcPtr;
  19     uint8_t* const e = (uint8_t*)dstEnd;
  20
  21     do
  22       {
  23         memcpy (d, s, 8);
  24         d += 8;
  25         s += 8;
  26       }
  27     while (d < e);
  28 }
  29
  30 /* { dg-final { scan-tree-dump-times "vectorized 0 loops" 1 "vect" } } */