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add a new CallGraphNode::replaceCallEdge method and use it from

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argpromote to avoid invalidating an iterator.  This fixes PR4977.
All clang tests now pass with expensive checking (on my system 
at least).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81843 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-09-15 05:40:35 +00:00
parent ff1147072a
commit a51c39cc32
3 changed files with 27 additions and 4 deletions
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17
lib/Analysis/IPA/CallGraph.cpp
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@ -279,5 +279,22 @@ void CallGraphNode::removeOneAbstractEdgeTo(CallGraphNode *Callee) {
}
}
/// replaceCallEdge - This method replaces the edge in the node for the
/// specified call site with a new one. Note that this method takes linear
/// time, so it should be used sparingly.
void CallGraphNode::replaceCallEdge(CallSite CS,
CallSite NewCS, CallGraphNode *NewNode){
for (CalledFunctionsVector::iterator I = CalledFunctions.begin(); ; ++I) {
assert(I != CalledFunctions.end() && "Cannot find callsite to remove!");
if (I->first == CS.getInstruction()) {
I->second->DropRef();
I->first = NewCS.getInstruction();
I->second = NewNode;
NewNode->AddRef();
return;
}
}
}
// Enuse that users of CallGraph.h also link with this file
DEFINING_FILE_FOR(CallGraph)