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[AVX] Implement 256-bit vector lowering for SCALAR_TO_VECTOR. This

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largely completes support for 128-bit fallback lowering for code that
is not 256-bit ready.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125315 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Greene 2011-02-10 23:11:29 +00:00
parent b453ce74f7
commit 2fcdfb448d
1 changed files with 18 additions and 0 deletions
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18
lib/Target/X86/X86ISelLowering.cpp
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@ -6116,7 +6116,25 @@ X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
SDValue
X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const {
LLVMContext *Context = DAG.getContext();
DebugLoc dl = Op.getDebugLoc();
EVT OpVT = Op.getValueType();
// If this is a 256-bit vector result, first insert into a 128-bit
// vector and then insert into the 256-bit vector.
if (OpVT.getSizeInBits() > 128) {
// Insert into a 128-bit vector.
EVT VT128 = EVT::getVectorVT(*Context,
OpVT.getVectorElementType(),
OpVT.getVectorNumElements() / 2);
Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
// Insert the 128-bit vector.
return Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, OpVT), Op,
DAG.getConstant(0, MVT::i32),
DAG, dl);
}
if (Op.getValueType() == MVT::v1i64 &&
Op.getOperand(0).getValueType() == MVT::i64)