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Add special case handling for calloc and realloc
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8630 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -412,6 +412,22 @@ void GraphBuilder::visitInvokeInst(InvokeInst &II) {
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}
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void GraphBuilder::visitCallSite(CallSite CS) {
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// Special case handling of certain libc allocation functions here.
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if (Function *F = CS.getCalledFunction())
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if (F->isExternal())
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if (F->getName() == "calloc") {
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setDestTo(*CS.getInstruction(),
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createNode()->setHeapNodeMarker()->setModifiedMarker());
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return;
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} else if (F->getName() == "realloc") {
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DSNodeHandle RetNH = getValueDest(*CS.getInstruction());
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RetNH.mergeWith(getValueDest(**CS.arg_begin()));
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DSNode *N = RetNH.getNode();
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if (N) N->setHeapNodeMarker()->setModifiedMarker()->setReadMarker();
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return;
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}
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// Set up the return value...
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DSNodeHandle RetVal;
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Instruction *I = CS.getInstruction();
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