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add some debug hooks for tracking the behavior of the isel.

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llvm-svn: 96812
This commit is contained in:
Chris Lattner 2010-02-22 22:15:39 +00:00
parent 4b14d5146f
commit b9f6931c4a
1 changed files with 12 additions and 0 deletions
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12
include/llvm/CodeGen/DAGISelHeader.h
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@ -336,6 +336,10 @@ SDNode *SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
// update the chain results when the pattern is complete.
SmallVector<SDNode*, 3> ChainNodesMatched;
DEBUG(errs() << "ISEL: Starting pattern match on root node: ";
NodeToMatch->dump(CurDAG);
errs() << '\n');
// Interpreter starts at opcode #0.
unsigned MatcherIndex = 0;
while (1) {
@ -722,6 +726,8 @@ SDNode *SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
std::copy(MatchedMemRefs.begin(), MatchedMemRefs.end(), MemRefs);
Res->setMemRefs(MemRefs, MemRefs + MatchedMemRefs.size());
}
DEBUG(errs() << " Created node: "; Res->dump(CurDAG); errs() << "\n");
continue;
}
@ -777,6 +783,9 @@ SDNode *SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
assert(NodeToMatch->use_empty() &&
"Didn't replace all uses of the node?");
DEBUG(errs() << "ISEL: Match complete!\n");
// FIXME: We just return here, which interacts correctly with SelectRoot
// above. We should fix this to not return an SDNode* anymore.
return 0;
@ -794,6 +803,9 @@ SDNode *SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
RecordedNodes.resize(LastScope.NumRecordedNodes);
NodeStack.resize(LastScope.NodeStackSize);
N = NodeStack.back();
DEBUG(errs() << " Match failed at index " << MatcherIndex
<< " continuing at " << LastScope.FailIndex << "\n");
if (LastScope.NumMatchedMemRefs != MatchedMemRefs.size())
MatchedMemRefs.resize(LastScope.NumMatchedMemRefs);