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Lower ConstantAggregateZero into zeros

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24890 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-12-21 02:43:26 +00:00
parent 8263c5e920
commit 3b841e9f52
1 changed files with 20 additions and 7 deletions
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27
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -306,16 +306,29 @@ public:
// Constant or ConstantFP node onto the ops list for each element of
// the packed constant.
std::vector<SDOperand> Ops;
for (unsigned i = 0; i < NumElements; ++i) {
const Constant *CEl = C->getOperand(i);
if (ConstantPacked *CP = dyn_cast<ConstantPacked>(C)) {
if (MVT::isFloatingPoint(PVT)) {
for (unsigned i = 0; i != NumElements; ++i) {
const ConstantFP *El = cast<ConstantFP>(CP->getOperand(i));
Ops.push_back(DAG.getConstantFP(El->getValue(), PVT));
}
} else {
for (unsigned i = 0; i != NumElements; ++i) {
const ConstantIntegral *El =
cast<ConstantIntegral>(CP->getOperand(i));
Ops.push_back(DAG.getConstant(El->getRawValue(), PVT));
}
}
} else {
assert(isa<ConstantAggregateZero>(C) && "Unknown packed constant!");
SDOperand Op;
if (MVT::isFloatingPoint(PVT))
Ops.push_back(DAG.getConstantFP(cast<ConstantFP>(CEl)->getValue(),
PVT));
Op = DAG.getConstantFP(0, PVT);
else
Ops.push_back(
DAG.getConstant(cast<ConstantIntegral>(CEl)->getRawValue(),
PVT));
Op = DAG.getConstant(0, PVT);
Ops.assign(NumElements, Op);
}
// Handle the case where we have a 1-element vector, in which
// case we want to immediately turn it into a scalar constant.
if (Ops.size() == 1) {