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AVX-512: Concat 4 128-bit vectors in one 512-bit vector. 

llvm-svn: 195229
This commit is contained in:
Elena Demikhovsky 2013-11-20 09:10:40 +00:00
parent 2f234f4908
commit e1f9bf054f
2 changed files with 23 additions and 3 deletions
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17
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -6150,14 +6150,27 @@ static SDValue LowerAVXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
if(ResVT.is256BitVector())
return Concat128BitVectors(V1, V2, ResVT, NumElems, DAG, dl);
if (Op.getNumOperands() == 4) {
MVT HalfVT = MVT::getVectorVT(ResVT.getScalarType(),
ResVT.getVectorNumElements()/2);
SDValue V3 = Op.getOperand(2);
SDValue V4 = Op.getOperand(3);
return Concat256BitVectors(Concat128BitVectors(V1, V2, HalfVT, NumElems/2, DAG, dl),
Concat128BitVectors(V3, V4, HalfVT, NumElems/2, DAG, dl), ResVT, NumElems, DAG, dl);
}
return Concat256BitVectors(V1, V2, ResVT, NumElems, DAG, dl);
}
static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
assert(Op.getNumOperands() == 2);
MVT VT = Op.getSimpleValueType();
unsigned NumOps = Op.getNumOperands();
assert((VT.is256BitVector() && NumOps == 2) ||
(VT.is512BitVector() && (NumOps == 2 || NumOps == 4)));
// AVX/AVX-512 can use the vinsertf128 instruction to create 256-bit vectors
// AVX can use the vinsertf128 instruction to create 256-bit vectors
// from two other 128-bit ones.
// 512-bit vector may contain 2 256-bit vectors or 4 128-bit vectors
return LowerAVXCONCAT_VECTORS(Op, DAG);
}

9
llvm/test/CodeGen/X86/avx512-shuffle.ll
View File

@ -223,4 +223,11 @@ define <16 x i32> @test25(<16 x i32> %a, <16 x i32> %b) nounwind {
define <16 x i32> @test26(<16 x i32> %a) nounwind {
%c = shufflevector <16 x i32> %a, <16 x i32> undef, <16 x i32> <i32 1, i32 1, i32 3, i32 3, i32 5, i32 5, i32 7, i32 undef, i32 9, i32 9, i32 undef, i32 11, i32 13, i32 undef, i32 undef, i32 undef>
ret <16 x i32> %c
}
}
; CHECK-LABEL: @test27
; CHECK: ret
define <16 x i32> @test27(<4 x i32>%a) {
%res = shufflevector <4 x i32> %a, <4 x i32> undef, <16 x i32> <i32 0, i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
ret <16 x i32> %res
}