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Add support for a bunch more functions

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11395 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-13 21:21:48 +00:00
parent be766c7246
commit 339d8df4c0
1 changed files with 56 additions and 0 deletions
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56
lib/Analysis/DataStructure/Local.cpp
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@ -520,6 +520,62 @@ void GraphBuilder::visitCallSite(CallSite CS) {
if (const PointerType *PTy = dyn_cast<PointerType>(ArgTy))
H.getNode()->mergeTypeInfo(PTy->getElementType(), H.getOffset());
return;
} else if (F->getName() == "fflush" && CS.arg_end()-CS.arg_begin() ==1){
// fclose reads and writes the memory for the file descriptor. It
// merges the FILE type into the descriptor.
DSNodeHandle H = getValueDest(**CS.arg_begin());
H.getNode()->setReadMarker()->setModifiedMarker();
const Type *ArgTy = *F->getFunctionType()->param_begin();
if (const PointerType *PTy = dyn_cast<PointerType>(ArgTy))
H.getNode()->mergeTypeInfo(PTy->getElementType(), H.getOffset());
return;
} else if (F->getName() == "fgets" && CS.arg_end()-CS.arg_begin() == 3){
// fclose reads and writes the memory for the file descriptor. It
// merges the FILE type into the descriptor, and writes to the
// argument. It returns the argument as well.
CallSite::arg_iterator AI = CS.arg_begin();
DSNodeHandle H = getValueDest(**AI);
if (DSNode *N = H.getNode())
N->setModifiedMarker(); // Writes buffer
H.mergeWith(getValueDest(*CS.getInstruction())); // Returns buffer
++AI; ++AI;
// Reads and writes file descriptor, merge in FILE type.
H = getValueDest(**CS.arg_begin());
if (DSNode *N = H.getNode())
N->setReadMarker()->setModifiedMarker();
const Type *ArgTy = *(F->getFunctionType()->param_begin()+2);
if (const PointerType *PTy = dyn_cast<PointerType>(ArgTy))
H.getNode()->mergeTypeInfo(PTy->getElementType(), H.getOffset());
return;
} else if (F->getName() == "printf" || F->getName() == "fprintf") {
CallSite::arg_iterator AI = CS.arg_begin(), E = CS.arg_end();
if (F->getName() == "fprintf") {
// fprintf reads and writes the FILE argument, and applies the type
// to it.
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());
}
}
for (; AI != E; ++AI) {
// printf reads all pointer arguments.
if (isPointerType((*AI)->getType()))
if (DSNode *N = getValueDest(**AI).getNode())
N->setReadMarker();
}
} else if (F->getName() == "exit") {
// Nothing to do!
} else {
std::cerr << "WARNING: Call to unknown external function '"
<< F->getName() << "' will cause pessimistic results!\n";
}
}