diff options
| author | David Greene <greened@obbligato.org> | 2011-02-10 23:11:29 +0000 |
|---|---|---|
| committer | David Greene <greened@obbligato.org> | 2011-02-10 23:11:29 +0000 |
| commit | 2fcdfb448debafcea8b22c02e2370ea8a5da8bad (patch) | |
| tree | b12bc2a5b695e01352d6d301a4bd95755ecda3c5 | |
| parent | b453ce74f7fd920ab66e477b39144d3f22f919f5 (diff) | |
[AVX] Implement 256-bit vector lowering for SCALAR_TO_VECTOR. This
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
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index fff006e3b8..596f010ec1 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -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) |