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[LCG] Add the most basic of edge insertion to the lazy call graph. This

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just handles the pre-DFS case. Also add some test cases for this case to
make sure it works.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207411 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2014-04-28 11:10:23 +00:00
parent e52aad4202
commit db0b52c8e0
3 changed files with 64 additions and 0 deletions
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15
lib/Analysis/LazyCallGraph.cpp
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@ -75,6 +75,14 @@ LazyCallGraph::Node::Node(LazyCallGraph &G, Function &F)
findCallees(Worklist, Visited, Callees, CalleeIndexMap);
}
void LazyCallGraph::Node::insertEdgeInternal(Function &Callee) {
CalleeIndexMap.insert(std::make_pair(&Callee, Callees.size()));
if (Node *N = G->lookup(Callee))
Callees.push_back(N);
else
Callees.push_back(&Callee);
}
void LazyCallGraph::Node::removeEdgeInternal(Function &Callee) {
auto IndexMapI = CalleeIndexMap.find(&Callee);
assert(IndexMapI != CalleeIndexMap.end() &&
@ -353,6 +361,13 @@ LazyCallGraph::SCC::removeIntraSCCEdge(Node &CallerN,
return ResultSCCs;
}
void LazyCallGraph::insertEdge(Node &CallerN, Function &Callee) {
assert(SCCMap.empty() && DFSStack.empty() &&
"This method cannot be called after SCCs have been formed!");
return CallerN.insertEdgeInternal(Callee);
}
void LazyCallGraph::removeEdge(Node &CallerN, Function &Callee) {
assert(SCCMap.empty() && DFSStack.empty() &&
"This method cannot be called after SCCs have been formed!");