+#ifndef NDEBUG
+static const Function *assertLocalFunction(const MDNode *N) {
+ if (!N->isFunctionLocal()) return 0;
+
+ // FIXME: This does not handle cyclic function local metadata.
+ const Function *F = 0, *NewF = 0;
+ for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
+ if (Value *V = N->getOperand(i)) {
+ if (MDNode *MD = dyn_cast<MDNode>(V))
+ NewF = assertLocalFunction(MD);
+ else
+ NewF = getFunctionForValue(V);
+ }
+ if (F == 0)
+ F = NewF;
+ else
+ assert((NewF == 0 || F == NewF) &&"inconsistent function-local metadata");
+ }
+ return F;
+}
+#endif
+
+// getFunction - If this metadata is function-local and recursively has a
+// function-local operand, return the first such operand's parent function.
+// Otherwise, return null. getFunction() should not be used for performance-
+// critical code because it recursively visits all the MDNode's operands.
+const Function *MDNode::getFunction() const {
+#ifndef NDEBUG
+ return assertLocalFunction(this);
+#endif
+ if (!isFunctionLocal()) return NULL;
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (const Function *F = getFunctionForValue(getOperand(i)))
+ return F;
+ return NULL;
+}
+
+// destroy - Delete this node. Only when there are no uses.
+void MDNode::destroy() {
+ setValueSubclassData(getSubclassDataFromValue() | DestroyFlag);
+ // Placement delete, the free the memory.
+ this->~MDNode();
+ free(this);
+}
+
+/// isFunctionLocalValue - Return true if this is a value that would require a
+/// function-local MDNode.
+static bool isFunctionLocalValue(Value *V) {
+ return isa<Instruction>(V) || isa<Argument>(V) || isa<BasicBlock>(V) ||
+ (isa<MDNode>(V) && cast<MDNode>(V)->isFunctionLocal());
+}
+
+MDNode *MDNode::getMDNode(LLVMContext &Context, Value *const *Vals,
+ unsigned NumVals, FunctionLocalness FL,
+ bool Insert) {