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First chunk of actually generating vector code for packed types. These

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changes allow us to generate the following code:

_foo:
        li r2, 0
        lvx v0, r2, r3
        vaddfp v0, v0, v0
        stvx v0, r2, r3
        blr

for this llvm:

void %foo(<4 x float>* %a) {
entry:
        %tmp1 = load <4 x float>* %a
        %tmp2 = add <4 x float> %tmp1, %tmp1
        store <4 x float> %tmp2, <4 x float>* %a
        ret void
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24534 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman
2005-11-30 08:22:07 +00:00
parent 7f0db91f86
commit f43a3ca26d
3 changed files with 80 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+12 -2
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@@ -520,12 +520,19 @@ void SelectionDAGLowering::visitBinary(User &I, unsigned IntOp, unsigned FPOp,
const PackedType *PTy = cast<PackedType>(Ty);
unsigned NumElements = PTy->getNumElements();
MVT::ValueType PVT = TLI.getValueType(PTy->getElementType());
MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements);
// Immediately scalarize packed types containing only one element, so that
// the Legalize pass does not have to deal with them.
// the Legalize pass does not have to deal with them. Similarly, if the
// abstract vector is going to turn into one that the target natively
// supports, generate that type now so that Legalize doesn't have to deal
// with that either. These steps ensure that Legalize only has to handle
// vector types in its Expand case.
unsigned Opc = MVT::isFloatingPoint(PVT) ? FPOp : IntOp;
if (NumElements == 1) {
unsigned Opc = MVT::isFloatingPoint(PVT) ? FPOp : IntOp;
setValue(&I, DAG.getNode(Opc, PVT, Op1, Op2));
} else if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) {
setValue(&I, DAG.getNode(Opc, TVT, Op1, Op2));
} else {
SDOperand Num = DAG.getConstant(NumElements, MVT::i32);
SDOperand Typ = DAG.getValueType(PVT);
@@ -777,11 +784,14 @@ void SelectionDAGLowering::visitLoad(LoadInst &I) {
const PackedType *PTy = cast<PackedType>(Ty);
unsigned NumElements = PTy->getNumElements();
MVT::ValueType PVT = TLI.getValueType(PTy->getElementType());
MVT::ValueType TVT = MVT::getVectorType(PVT, NumElements);
// Immediately scalarize packed types containing only one element, so that
// the Legalize pass does not have to deal with them.
if (NumElements == 1) {
L = DAG.getLoad(PVT, Root, Ptr, DAG.getSrcValue(I.getOperand(0)));
} else if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) {
L = DAG.getLoad(TVT, Root, Ptr, DAG.getSrcValue(I.getOperand(0)));
} else {
L = DAG.getVecLoad(NumElements, PVT, Root, Ptr,
DAG.getSrcValue(I.getOperand(0)));