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Only spit out warning for functions that take pointers, not for sin and the like

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Add more special case handling for stdio functions.  I feel dirty, how about you?


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11506 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-16 22:57:19 +00:00
parent 2e9bb1a88e
commit 304e143b16
1 changed files with 25 additions and 5 deletions
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26
lib/Analysis/DataStructure/Local.cpp
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@ -484,6 +484,12 @@ void GraphBuilder::visitCallSite(CallSite CS) {
if (DSNode *N = RetNH.getNode())
N->setHeapNodeMarker()->setModifiedMarker()->setReadMarker();
return;
} else if (F->getName() == "atoi") {
// atoi reads its argument.
if (DSNode *N = getValueDest(**CS.arg_begin()).getNode())
N->setReadMarker();
return;
} else if (F->getName() == "fopen" && CS.arg_end()-CS.arg_begin() == 2){
// fopen reads the mode argument strings.
CallSite::arg_iterator AI = CS.arg_begin();
@ -511,8 +517,11 @@ 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
} else if (CS.arg_end()-CS.arg_begin() == 1 &&
(F->getName() == "fflush" || F->getName() == "feof" ||
F->getName() == "fileno" || F->getName() == "clearerr" ||
F->getName() == "rewind" || F->getName() == "ftell")) {
// fflush 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();
@ -522,7 +531,7 @@ void GraphBuilder::visitCallSite(CallSite CS) {
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
// fgets 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();
@ -565,6 +574,17 @@ void GraphBuilder::visitCallSite(CallSite CS) {
} else if (F->getName() == "exit") {
// Nothing to do!
} else {
// Unknown function, warn if it returns a pointer type or takes a
// pointer argument.
bool Warn = isPointerType(CS.getInstruction()->getType());
if (!Warn)
for (CallSite::arg_iterator I = CS.arg_begin(), E = CS.arg_end();
I != E; ++I)
if (isPointerType((*I)->getType())) {
Warn = true;
break;
}
if (Warn)
std::cerr << "WARNING: Call to unknown external function '"
<< F->getName() << "' will cause pessimistic results!\n";
}