[PATCH] D13648: AVX512: shuff62x2 DAG lowering

[Igor Breger via llvm-commits]

igorb created this revision.
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AVX512:  Implemented DAG lowering for shuff62x2/shufi62x2 instructions ( shuffle packed values at 128-bit granularity ) 
example
    shufflevector <8 x double> %x, <8 x double> %x1, <8 x i32> <i32 0, i32 1, i32 4, i32 5, i32 0, i32 1,  i32 4, i32 5>
  Before optimization the follow instructions was generated:
    vmovdqa64	LCPI0_0(%rip), %zmm1
    vpermpd	%zmm0, %zmm1, %zmm0
 After optimization:
    vshuff64x2 $136, %zmm0, %zmm0, %zmm0


Repository:
  rL LLVM

http://reviews.llvm.org/D13648

Files:
  lib/Target/X86/InstPrinter/X86InstComments.cpp
  lib/Target/X86/Utils/X86ShuffleDecode.cpp
  lib/Target/X86/Utils/X86ShuffleDecode.h
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/avx512-intrinsics.ll
  test/CodeGen/X86/vector-shuffle-512-v8.ll
  test/CodeGen/X86/vector-shuffle-v1.ll

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