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improve mem intrinsics and add a few things povray uses 

llvm-svn: 26774
This commit is contained in:
Andrew Lenharth 2006-03-15 03:43:59 +00:00
parent c4e2468251
commit c254e5b180
1 changed files with 30 additions and 3 deletions
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33
llvm/lib/Analysis/DataStructure/Local.cpp
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@ -545,10 +545,18 @@ void GraphBuilder::visitCallSite(CallSite CS) {
return;
case Intrinsic::vaend:
return; // noop
case Intrinsic::memmove_i32:
case Intrinsic::memcpy_i32:
case Intrinsic::memmove_i64:
case Intrinsic::memcpy_i64: {
//write first location
if (DSNode *N = getValueDest(**CS.arg_begin()).getNode())
N->setHeapNodeMarker()->setModifiedMarker();
//and read second pointer
if (DSNode *N = getValueDest(**(CS.arg_begin() + 1)).getNode())
N->setReadMarker();
return;
}
case Intrinsic::memmove_i32:
case Intrinsic::memmove_i64: {
// Merge the first & second arguments, and mark the memory read and
// modified.
DSNodeHandle RetNH = getValueDest(**CS.arg_begin());
@ -676,7 +684,6 @@ void GraphBuilder::visitCallSite(CallSite CS) {
Link.mergeWith(getValueDest(**CS.arg_begin()));
}
}
return;
} else if (F->getName() == "fopen" || F->getName() == "fdopen" ||
F->getName() == "freopen") {
@ -981,6 +988,26 @@ void GraphBuilder::visitCallSite(CallSite CS) {
N->mergeTypeInfo(Type::DoubleTy, H.getOffset());
}
return;
} else if (F->getName() == "qsort") {
CallSite::arg_iterator AI = CS.arg_begin();
if (DSNode *N = getValueDest(**AI).getNode())
N->setModifiedMarker();
//How do you mark a function pointer as being called? Assume it is a read
AI += 3;
if (DSNode *N = getValueDest(**AI).getNode())
N->setReadMarker();
return;
} else if (F->getName() == "strcat" || F->getName() == "strncat") {
//This might be making unsafe assumptions about usage
//Merge return and first arg
DSNodeHandle RetNH = getValueDest(*CS.getInstruction());
RetNH.mergeWith(getValueDest(**CS.arg_begin()));
if (DSNode *N = RetNH.getNode())
N->setHeapNodeMarker()->setModifiedMarker()->setReadMarker();
//and read second pointer
if (DSNode *N = getValueDest(**(CS.arg_begin() + 1)).getNode())
N->setReadMarker();
return;
} else {
// Unknown function, warn if it returns a pointer type or takes a
// pointer argument.