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Forgot about chain result; also UNDEF cannot have multiple values.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36622 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-05-01 08:53:39 +00:00
parent 60ce9b5a01
commit 498f55989a
1 changed files with 12 additions and 12 deletions
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24
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -3331,19 +3331,19 @@ SDOperand DAGCombiner::visitLOAD(SDNode *N) {
// the updated indexed value in case of indexed loads), change uses of the // the updated indexed value in case of indexed loads), change uses of the
// chain value into uses of the chain input (i.e. delete the dead load). // chain value into uses of the chain input (i.e. delete the dead load).
if (!LD->isVolatile()) { if (!LD->isVolatile()) {
bool HasUses = false; if (N->getValueType(1) == MVT::Other) {
SmallVector<MVT::ValueType, 2> VTs; // Unindexed loads.
for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) { if (N->hasNUsesOfValue(0, 0))
if (!N->hasNUsesOfValue(0, i)) { return CombineTo(N, DAG.getNode(ISD::UNDEF, N->getValueType(0)), Chain);
HasUses = true; } else {
break; // Indexed loads.
assert(N->getValueType(2) == MVT::Other && "Malformed indexed loads?");
if (N->hasNUsesOfValue(0, 0) && N->hasNUsesOfValue(0, 1)) {
SDOperand Undef0 = DAG.getNode(ISD::UNDEF, N->getValueType(0));
SDOperand Undef1 = DAG.getNode(ISD::UNDEF, N->getValueType(1));
SDOperand To[] = { Undef0, Undef1, Chain };
return CombineTo(N, To, 3);
} }
VTs.push_back(N->getValueType(i));
}
if (!HasUses) {
SmallVector<SDOperand, 1> Ops;
return CombineTo(N, DAG.getNode(ISD::UNDEF, &VTs[0], VTs.size(), 0, 0),
Chain);
} }
} }