gcc/testsuite/gcc.target/i386/pr82460-2.c

   1 /* PR target/82460 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -ftree-vectorize -mavx512vbmi -mprefer-vector-width=none" } */
   4 /* We want to reuse the permutation mask in the loop, so use vpermt2b rather
   5    than vpermi2b.  */
   6 /* { dg-final { scan-assembler-not {\mvpermi2b\M} } } */
   7 /* { dg-final { scan-assembler {\mvpermt2b\M} } } */
   8
   9 void
  10 foo (unsigned char *__restrict__ x, const unsigned short *__restrict__ y,
  11      unsigned long z)
  12 {
  13   unsigned char *w = x + z;
  14   do
  15     *x++ = *y++ >> 8;
  16   while (x < w);
  17 }