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properly record chain inputs to complex patterns,

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resolving a fixme.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96457 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-02-17 06:08:25 +00:00
parent 64b4986c94
commit 8dc4f2bb60
1 changed files with 13 additions and 6 deletions
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19
utils/TableGen/DAGISelMatcherGen.cpp
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@ -155,7 +155,18 @@ void MatcherGen::EmitLeafMatchCode(const TreePatternNode *N) {
// Handle complex pattern.
const ComplexPattern &CP = CGP.getComplexPattern(LeafRec);
return AddMatcherNode(new CheckComplexPatMatcherNode(CP));
AddMatcherNode(new CheckComplexPatMatcherNode(CP));
// If the complex pattern has a chain, then we need to keep track of the
// fact that we just recorded a chain input. The chain input will be
// matched as the last operand of the predicate if it was successful.
if (CP.hasProperty(SDNPHasChain)) {
// It is the last operand recorded.
assert(NextRecordedOperandNo > 1 &&
"Should have recorded input/result chains at least!");
InputChains.push_back(NextRecordedOperandNo-1);
}
return;
}
errs() << "Unknown leaf kind: " << *N << "\n";
@ -203,9 +214,6 @@ void MatcherGen::EmitOperatorMatchCode(const TreePatternNode *N,
// the child numbers of the node are all offset by one.
unsigned OpNo = 0;
if (N->NodeHasProperty(SDNPHasChain, CGP)) {
// FIXME: Not correct for complex patterns, they need to push their own
// *matched* input chain.
// Record the input chain, which is always input #0 of the SDNode.
AddMatcherNode(new MoveChildMatcherNode(0));
AddMatcherNode(new RecordMatcherNode("'" + N->getOperator()->getName() +
@ -222,8 +230,7 @@ void MatcherGen::EmitOperatorMatchCode(const TreePatternNode *N,
// happen if there were an intermediate node between the indbr and load, for
// example.
// FIXME: Emit "lastchain.getNode() == CurrentNode ||
// IsChainCompatible(lastchain.getNode(), CurrentNode)".
// FIXME: Emit "IsChainCompatible(lastchain.getNode(), CurrentNode)".
// Rename IsChainCompatible -> IsChainUnreachable, add comment about
// complexity.