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Implement the Expand action for binary vector operations to break the binop

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into elements and operate on each piece.  This allows generic vector integer
multiplies to work on PPC, though the generated code is horrible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27347 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-04-02 03:57:31 +00:00
parent e58a780166
commit bc70cf8be9
1 changed files with 18 additions and 1 deletions
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19
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1916,12 +1916,29 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
switch (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0))) {
default: assert(0 && "Operation not supported");
default: assert(0 && "BinOp legalize operation not supported");
case TargetLowering::Legal: break;
case TargetLowering::Custom:
Tmp1 = TLI.LowerOperation(Result, DAG);
if (Tmp1.Val) Result = Tmp1;
break;
case TargetLowering::Expand: {
assert(MVT::isVector(Node->getValueType(0)) &&
"Cannot expand this binary operator!");
// Expand the operation into a bunch of nasty scalar code.
std::vector<SDOperand> Ops;
MVT::ValueType EltVT = MVT::getVectorBaseType(Node->getValueType(0));
MVT::ValueType PtrVT = TLI.getPointerTy();
for (unsigned i = 0, e = MVT::getVectorNumElements(Node->getValueType(0));
i != e; ++i) {
SDOperand Idx = DAG.getConstant(i, PtrVT);
SDOperand LHS = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp1, Idx);
SDOperand RHS = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, EltVT, Tmp2, Idx);
Ops.push_back(DAG.getNode(Node->getOpcode(), EltVT, LHS, RHS));
}
Result = DAG.getNode(ISD::BUILD_VECTOR, Node->getValueType(0), Ops);
break;
}
}
break;