[LLVMbugs] [Bug 15712] inefficient code generation for 128-bit->256-bit typecast intrinsics

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=15712

Rafael Ávila de Espíndola <rafael.espindola at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Rafael Ávila de Espíndola <rafael.espindola at gmail.com> ---
Given

__m256i f1(__m128i x) {
  return _mm256_castsi128_si256(x);
}
__m256 f2(__m128 x) {
  return _mm256_castps128_ps256(x);
}
__m256d f3(__m128d x) {
  return _mm256_castpd128_pd256(x);
}

clang trunk produces:

_f1:
0000000000000000    retq
_f2:
0000000000000001    retq
_f3:
0000000000000002    retq

So this was fixed along the way.

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