gcc/testsuite/gcc.target/i386/avx-vextractf128-256-5.c

   1 /* { dg-do assemble { target { ! ia32 } } } */
   2 /* { dg-require-effective-target avx512f } */
   3 /* { dg-options "-O2 -mavx512f" } */
   4
   5 #include <immintrin.h>
   6
   7 register __m512d z asm ("zmm16"); /* { dg-warning "call-clobbered register used for global register variable" } */
   8
   9 __m128d foo ()
  10 {
  11   return _mm256_extractf128_pd (_mm512_extractf64x4_pd(z, 0), 1);
  12 }