6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-19 19:30:10 +00:00
Code Issues Projects Releases Wiki Activity

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

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
lib/Analysis/DataStructure/Local.cpp
View File

@ -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();
@ -565,8 +574,19 @@ void GraphBuilder::visitCallSite(CallSite CS) {
} else if (F->getName() == "exit") {
// Nothing to do!
} else {
std::cerr << "WARNING: Call to unknown external function '"
<< F->getName() << "' will cause pessimistic results!\n";
// 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";
}
}