1 //===-- Method.cpp - Implement the Method class ------------------*- C++ -*--=//
3 // This file implements the Method class for the VMCore library.
5 //===----------------------------------------------------------------------===//
7 #include "llvm/ValueHolderImpl.h"
8 #include "llvm/DerivedTypes.h"
9 #include "llvm/SymbolTable.h"
10 #include "llvm/Module.h"
11 #include "llvm/Method.h"
12 #include "llvm/BasicBlock.h"
13 #include "llvm/iOther.h"
15 // Instantiate Templates - This ugliness is the price we have to pay
16 // for having a ValueHolderImpl.h file seperate from ValueHolder.h! :(
18 template class ValueHolder<MethodArgument, Method, Method>;
19 template class ValueHolder<BasicBlock , Method, Method>;
21 Method::Method(const MethodType *Ty, const string &name)
22 : Value(Ty, Value::MethodVal, name), SymTabValue(this), BasicBlocks(this),
23 ArgumentList(this, this) {
24 assert(Ty->isMethodType() && "Method signature must be of method type!");
29 dropAllReferences(); // After this it is safe to delete instructions.
31 // TODO: Should remove from the end, not the beginning of vector!
32 iterator BI = begin();
33 while ((BI = begin()) != end())
34 delete BasicBlocks.remove(BI);
36 // Delete all of the method arguments and unlink from symbol table...
37 ArgumentList.delete_all();
38 ArgumentList.setParent(0);
41 // Specialize setName to take care of symbol table majik
42 void Method::setName(const string &name) {
44 if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
46 if (P && getName() != "") P->getSymbolTableSure()->insert(this);
49 void Method::setParent(Module *parent) {
52 // Relink symbol tables together...
53 setParentSymTab(Parent ? Parent->getSymbolTableSure() : 0);
56 const Type *Method::getReturnType() const {
57 return ((const MethodType *)getType())->getReturnType();
60 const MethodType *Method::getMethodType() const {
61 return (const MethodType *)getType();
64 // dropAllReferences() - This function causes all the subinstructions to "let
65 // go" of all references that they are maintaining. This allows one to
66 // 'delete' a whole class at a time, even though there may be circular
67 // references... first all references are dropped, and all use counts go to
68 // zero. Then everything is delete'd for real. Note that no operations are
69 // valid on an object that has "dropped all references", except operator
72 void Method::dropAllReferences() {
73 for_each(begin(), end(), std::mem_fun(&BasicBlock::dropAllReferences));