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Add a bunch more functions used by perlbmk

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11824 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-25 17:43:20 +00:00
parent cac4b8ea04
commit adc1efe81c
1 changed files with 50 additions and 14 deletions
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64
lib/Analysis/DataStructure/Local.cpp
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@ -484,8 +484,13 @@ void GraphBuilder::visitCallSite(CallSite CS) {
N->setHeapNodeMarker()->setModifiedMarker()->setReadMarker();
return;
} else if (F->getName() == "atoi" || F->getName() == "atof" ||
F->getName() == "atol" || F->getName() == "atoll" ||
F->getName() == "remove" || F->getName() == "unlink" ||
F->getName() == "rename") {
F->getName() == "rename" || F->getName() == "memcmp" ||
F->getName() == "strcmp" || F->getName() == "strncmp" ||
F->getName() == "execl" || F->getName() == "execlp" ||
F->getName() == "execle" || F->getName() == "execv" ||
F->getName() == "execvp" || F->getName() == "chmod") {
// These functions read all of their pointer operands.
for (CallSite::arg_iterator AI = CS.arg_begin(), E = CS.arg_end();
AI != E; ++AI) {
@ -494,13 +499,35 @@ void GraphBuilder::visitCallSite(CallSite CS) {
N->setReadMarker();
}
return;
} else if (F->getName() == "stat" || F->getName() == "fstat" ||
F->getName() == "lstat") {
// These functions read their first operand if its a pointer.
CallSite::arg_iterator AI = CS.arg_begin();
if (isPointerType((*AI)->getType())) {
DSNodeHandle Path = getValueDest(**AI);
if (DSNode *N = Path.getNode()) N->setReadMarker();
}
} else if (F->getName() == "fopen" && CS.arg_end()-CS.arg_begin() == 2){
// Then they write into the stat buffer.
DSNodeHandle StatBuf = getValueDest(**++AI);
if (DSNode *N = StatBuf.getNode()) {
N->setModifiedMarker();
const Type *StatTy = F->getFunctionType()->getParamType(1);
if (const PointerType *PTy = dyn_cast<PointerType>(StatTy))
N->mergeTypeInfo(PTy->getElementType(), StatBuf.getOffset());
}
return;
} else if (F->getName() == "fopen" || F->getName() == "fdopen") {
// fopen reads the mode argument strings.
CallSite::arg_iterator AI = CS.arg_begin();
DSNodeHandle Path = getValueDest(**AI);
if (isPointerType((*AI)->getType())) {
DSNodeHandle Path = getValueDest(**AI);
if (DSNode *N = Path.getNode()) N->setReadMarker();
}
DSNodeHandle Mode = getValueDest(**++AI);
if (DSNode *N = Path.getNode()) N->setReadMarker();
if (DSNode *N = Mode.getNode()) N->setReadMarker();
// fopen allocates in an unknown way and writes to the file
@ -513,13 +540,6 @@ void GraphBuilder::visitCallSite(CallSite CS) {
N->mergeTypeInfo(PTy->getElementType(), Result.getOffset());
}
return;
} else if (F->getName() == "memcmp" && CS.arg_end()-CS.arg_begin() ==3){
// memcmp reads the memory pointed to by the first two operands.
if (DSNode *N = getValueDest(**CS.arg_begin()).getNode())
N->setReadMarker();
if (DSNode *N = getValueDest(**++CS.arg_begin()).getNode())
N->setReadMarker();
return;
} else if (F->getName() == "fclose" && CS.arg_end()-CS.arg_begin() ==1){
// fclose reads and deallocates the memory in an unknown way for the
// file descriptor. It merges the FILE type into the descriptor.
@ -577,10 +597,20 @@ void GraphBuilder::visitCallSite(CallSite CS) {
++AI; ++AI;
// Reads and writes file descriptor, merge in FILE type.
H = getValueDest(**CS.arg_begin());
H = getValueDest(**AI);
if (DSNode *N = H.getNode()) {
N->setReadMarker()->setModifiedMarker();
const Type *ArgTy = *(F->getFunctionType()->param_begin()+2);
const Type *ArgTy = F->getFunctionType()->getParamType(2);
if (const PointerType *PTy = dyn_cast<PointerType>(ArgTy))
N->mergeTypeInfo(PTy->getElementType(), H.getOffset());
}
return;
} else if (F->getName() == "ungetc" &&CS.arg_end()-CS.arg_begin() == 2){
// ungetc reads and writes the memory for the file descriptor.
DSNodeHandle H = getValueDest(**--CS.arg_end());
if (DSNode *N = H.getNode()) {
N->setReadMarker()->setModifiedMarker();
const Type *ArgTy = F->getFunctionType()->getParamType(1);
if (const PointerType *PTy = dyn_cast<PointerType>(ArgTy))
N->mergeTypeInfo(PTy->getElementType(), H.getOffset());
}
@ -608,7 +638,6 @@ void GraphBuilder::visitCallSite(CallSite CS) {
if (const PointerType *PTy = dyn_cast<PointerType>(ArgTy))
N->mergeTypeInfo(PTy->getElementType(), H.getOffset());
}
}
for (; AI != E; ++AI) {
@ -672,6 +701,13 @@ void GraphBuilder::visitCallSite(CallSite CS) {
N->mergeTypeInfo(PTy->getElementType(), H.getOffset());
}
return;
} else if (F->getName() == "strchr" || F->getName() == "strrchr") {
// These read their first argument, and return it.
DSNodeHandle H = getValueDest(**CS.arg_begin());
if (DSNode *N = H.getNode())
N->setReadMarker();
H.mergeWith(getValueDest(*CS.getInstruction())); // Returns buffer
return;
} else {
// Unknown function, warn if it returns a pointer type or takes a