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Add special case handling for calloc and realloc

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llvm-svn: 8630
This commit is contained in:
Chris Lattner 2003-09-20 16:50:46 +00:00
parent b12a8a6177
commit 372fe6873d
1 changed files with 16 additions and 0 deletions
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16
lib/Analysis/DataStructure/Local.cpp
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@ -412,6 +412,22 @@ void GraphBuilder::visitInvokeInst(InvokeInst &II) {
}
void GraphBuilder::visitCallSite(CallSite CS) {
// Special case handling of certain libc allocation functions here.
if (Function *F = CS.getCalledFunction())
if (F->isExternal())
if (F->getName() == "calloc") {
setDestTo(*CS.getInstruction(),
createNode()->setHeapNodeMarker()->setModifiedMarker());
return;
} else if (F->getName() == "realloc") {
DSNodeHandle RetNH = getValueDest(*CS.getInstruction());
RetNH.mergeWith(getValueDest(**CS.arg_begin()));
DSNode *N = RetNH.getNode();
if (N) N->setHeapNodeMarker()->setModifiedMarker()->setReadMarker();
return;
}
// Set up the return value...
DSNodeHandle RetVal;
Instruction *I = CS.getInstruction();