[Bug target/50829] avx extra copy for _mm256_insertf128_pd

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50829



Marc Glisse <glisse at gcc dot gnu.org> changed:



           What    |Removed                     |Added

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                 CC|                            |glisse at gcc dot gnu.org



--- Comment #9 from Marc Glisse <glisse at gcc dot gnu.org> 2012-12-01 16:30:23 
UTC ---

The code with intrinsics still has the extra move, but note that this version

without intrinsics generates perfect code:



#include <x86intrin.h>

__m256d concat(__m128d x){

  __m256d z={x[0],x[1],x[0],x[1]};

  return z;

}