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