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Add non-crappy support for varargs

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12126 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-03-04 20:33:47 +00:00
parent e6e93ccd0c
commit 6b3e3ccf73
1 changed files with 32 additions and 6 deletions
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38
lib/Analysis/DataStructure/Local.cpp
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@ -117,6 +117,8 @@ namespace {
void visitInstruction(Instruction &I);
void visitCallSite(CallSite CS);
void visitVANextInst(VANextInst &I);
void visitVAArgInst(VAArgInst &I);
void MergeConstantInitIntoNode(DSNodeHandle &NH, Constant *C);
private:
@ -281,11 +283,7 @@ DSNodeHandle &GraphBuilder::getLink(const DSNodeHandle &node, unsigned LinkNo) {
/// merge the two destinations together.
///
void GraphBuilder::setDestTo(Value &V, const DSNodeHandle &NH) {
DSNodeHandle &AINH = ScalarMap[&V];
if (AINH.getNode() == 0) // Not pointing to anything yet?
AINH = NH; // Just point directly to NH
else
AINH.mergeWith(NH);
ScalarMap[&V].mergeWith(NH);
}
@ -442,7 +440,7 @@ void GraphBuilder::visitLoadInst(LoadInst &LI) {
void GraphBuilder::visitStoreInst(StoreInst &SI) {
const Type *StoredTy = SI.getOperand(0)->getType();
DSNodeHandle Dest = getValueDest(*SI.getOperand(1));
if (Dest.getNode() == 0) return;
if (Dest.isNull()) return;
// Mark that the node is written to...
Dest.getNode()->setModifiedMarker();
@ -460,6 +458,25 @@ void GraphBuilder::visitReturnInst(ReturnInst &RI) {
RetNode->mergeWith(getValueDest(*RI.getOperand(0)));
}
void GraphBuilder::visitVANextInst(VANextInst &I) {
getValueDest(*I.getOperand(0)).mergeWith(getValueDest(I));
}
void GraphBuilder::visitVAArgInst(VAArgInst &I) {
DSNodeHandle Ptr = getValueDest(*I.getOperand(0));
if (Ptr.isNull()) return;
// Make that the node is read from.
Ptr.getNode()->setReadMarker();
// Ensure a typerecord exists...
Ptr.getNode()->mergeTypeInfo(I.getType(), Ptr.getOffset(), false);
if (isPointerType(I.getType()))
setDestTo(I, getLink(Ptr));
}
void GraphBuilder::visitCallInst(CallInst &CI) {
visitCallSite(&CI);
}
@ -477,6 +494,15 @@ void GraphBuilder::visitCallSite(CallSite CS) {
if (Function *F = dyn_cast<Function>(Callee))
if (F->isExternal())
switch (F->getIntrinsicID()) {
case Intrinsic::va_start:
getValueDest(*CS.getInstruction()).getNode()->setAllocaNodeMarker();
return;
case Intrinsic::va_copy:
getValueDest(*CS.getInstruction()).
mergeWith(getValueDest(**(CS.arg_begin())));
return;
case Intrinsic::va_end:
return; // noop
case Intrinsic::memmove:
case Intrinsic::memcpy: {
// Merge the first & second arguments, and mark the memory read and