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Add support for strto* and v*printf

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12127 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-03-04 21:03:54 +00:00
parent 6b3e3ccf73
commit 3aeb40cadb
1 changed files with 66 additions and 0 deletions
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66
lib/Analysis/DataStructure/Local.cpp
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@ -585,6 +585,24 @@ void GraphBuilder::visitCallSite(CallSite CS) {
if (const PointerType *PTy = dyn_cast<PointerType>(StatTy))
N->mergeTypeInfo(PTy->getElementType(), StatBuf.getOffset());
}
return;
} else if (F->getName() == "strtod" || F->getName() == "strtof" ||
F->getName() == "strtold") {
// These functions read the first pointer
if (DSNode *Str = getValueDest(**CS.arg_begin()).getNode()) {
Str->setReadMarker();
// If the second parameter is passed, it will point to the first
// argument node.
const DSNodeHandle &EndPtrNH = getValueDest(**(CS.arg_begin()+1));
if (DSNode *End = EndPtrNH.getNode()) {
End->mergeTypeInfo(PointerType::get(Type::SByteTy),
EndPtrNH.getOffset(), false);
End->setModifiedMarker();
DSNodeHandle &Link = getLink(EndPtrNH);
Link.mergeWith(getValueDest(**CS.arg_begin()));
}
}
return;
} else if (F->getName() == "fopen" || F->getName() == "fdopen" ||
F->getName() == "freopen") {
@ -748,6 +766,54 @@ void GraphBuilder::visitCallSite(CallSite CS) {
if (DSNode *N = getValueDest(**AI).getNode())
N->setReadMarker();
}
return;
} else if (F->getName() == "vprintf" || F->getName() == "vfprintf" ||
F->getName() == "vsprintf") {
CallSite::arg_iterator AI = CS.arg_begin(), E = CS.arg_end();
if (F->getName() == "vfprintf") {
// ffprintf reads and writes the FILE argument, and applies the type
// to it.
DSNodeHandle H = getValueDest(**AI);
if (DSNode *N = H.getNode()) {
N->setModifiedMarker()->setReadMarker();
const Type *ArgTy = (*AI)->getType();
if (const PointerType *PTy = dyn_cast<PointerType>(ArgTy))
N->mergeTypeInfo(PTy->getElementType(), H.getOffset());
}
++AI;
} else if (F->getName() == "vsprintf") {
// vsprintf writes the first string argument.
DSNodeHandle H = getValueDest(**AI++);
if (DSNode *N = H.getNode()) {
N->setModifiedMarker();
const Type *ArgTy = (*AI)->getType();
if (const PointerType *PTy = dyn_cast<PointerType>(ArgTy))
N->mergeTypeInfo(PTy->getElementType(), H.getOffset());
}
}
// Read the format
if (AI != E) {
if (isPointerType((*AI)->getType()))
if (DSNode *N = getValueDest(**AI).getNode())
N->setReadMarker();
++AI;
}
// Read the valist, and the pointed-to objects.
if (AI != E && isPointerType((*AI)->getType())) {
const DSNodeHandle &VAList = getValueDest(**AI);
if (DSNode *N = VAList.getNode()) {
N->setReadMarker();
N->mergeTypeInfo(PointerType::get(Type::SByteTy),
VAList.getOffset(), false);
DSNodeHandle &VAListObjs = getLink(VAList);
VAListObjs.getNode()->setReadMarker();
}
}
return;
} else if (F->getName() == "scanf" || F->getName() == "fscanf" ||
F->getName() == "sscanf") {