[llvm-commits] CVS: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
Evan Cheng
evan.cheng at apple.com
Tue Apr 4 23:07:23 PDT 2006
Changes in directory llvm/lib/CodeGen/SelectionDAG:
LegalizeDAG.cpp updated: 1.352 -> 1.353
---
Log message:
Exapnd a VECTOR_SHUFFLE to a BUILD_VECTOR if target asks for it to be expanded
or custom lowering fails.
---
Diffs of the changes: (+30 -2)
LegalizeDAG.cpp | 32 ++++++++++++++++++++++++++++++--
1 files changed, 30 insertions(+), 2 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.352 llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.353
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.352 Tue Apr 4 12:23:26 2006
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp Wed Apr 5 01:07:11 2006
@@ -933,9 +933,37 @@
"vector shuffle should not be created if not legal!");
break;
case TargetLowering::Custom:
- Tmp1 = TLI.LowerOperation(Result, DAG);
- if (Tmp1.Val) Result = Tmp1;
+ Tmp3 = TLI.LowerOperation(Result, DAG);
+ if (Tmp3.Val) {
+ Result = Tmp3;
+ break;
+ }
+ // FALLTHROUGH
+ case TargetLowering::Expand: {
+ MVT::ValueType VT = Node->getValueType(0);
+ MVT::ValueType EltVT = MVT::getVectorBaseType(VT);
+ MVT::ValueType PtrVT = TLI.getPointerTy();
+ SDOperand Mask = Node->getOperand(2);
+ unsigned NumElems = Mask.getNumOperands();
+ std::vector<SDOperand> Ops;
+ for (unsigned i = 0; i != NumElems; ++i) {
+ SDOperand Arg = Mask.getOperand(i);
+ if (Arg.getOpcode() == ISD::UNDEF) {
+ Ops.push_back(DAG.getNode(ISD::UNDEF, EltVT));
+ } else {
+ assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
+ unsigned Idx = cast<ConstantSDNode>(Arg)->getValue();
+ if (Idx < NumElems)
+ Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp1,
+ DAG.getConstant(Idx, PtrVT)));
+ else
+ Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp2,
+ DAG.getConstant(Idx - NumElems, PtrVT)));
+ }
+ }
+ Result = DAG.getNode(ISD::BUILD_VECTOR, VT, Ops);
break;
+ }
case TargetLowering::Promote: {
// Change base type to a different vector type.
MVT::ValueType OVT = Node->getValueType(0);
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