[llvm-commits] X86 mayfold patch.

[Jakub Staszak]

The attached patch allows to fold vector load if there is more than one bitcast, so in the case:

  %0 = load <8 x i16>* %dest
  %1 = shufflevector <8 x i16> %0, <8 x i16> %in, <8 x i32> < i32 0, i32 1, i32 2, i32 3, i32 13, i32 undef, i32 14, i32 14>
  store <8 x i16> %1, <8 x i16>* %dest

We get:

        vmovlpd (%eax), %xmm0, %xmm0

instead of

        vmovaps (%eax), %xmm1
        vmovsd  %xmm1, %xmm0, %xmm0

No extra test-case is added. I just fixed the existing one (also it uses FileCheck now).

OK to commit?
- Kuba
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