1 //===-- Method.cpp - Implement the Method class ------------------*- C++ -*--=//
3 // This file implements the Method & GlobalVariable classes for the VMCore
6 //===----------------------------------------------------------------------===//
8 #include "llvm/ValueHolderImpl.h"
9 #include "llvm/DerivedTypes.h"
10 #include "llvm/SymbolTable.h"
11 #include "llvm/Module.h"
12 #include "llvm/Method.h"
13 #include "llvm/GlobalVariable.h"
14 #include "llvm/BasicBlock.h"
15 #include "llvm/iOther.h"
17 //===----------------------------------------------------------------------===//
18 // Method Implementation
19 //===----------------------------------------------------------------------===//
22 // Instantiate Templates - This ugliness is the price we have to pay
23 // for having a ValueHolderImpl.h file seperate from ValueHolder.h! :(
25 template class ValueHolder<MethodArgument, Method, Method>;
26 template class ValueHolder<BasicBlock , Method, Method>;
28 Method::Method(const MethodType *Ty, const string &name)
29 : Value(Ty, Value::MethodVal, name), SymTabValue(this), BasicBlocks(this),
30 ArgumentList(this, this) {
31 assert(Ty->isMethodType() && "Method signature must be of method type!");
36 dropAllReferences(); // After this it is safe to delete instructions.
38 // TODO: Should remove from the end, not the beginning of vector!
39 iterator BI = begin();
40 while ((BI = begin()) != end())
41 delete BasicBlocks.remove(BI);
43 // Delete all of the method arguments and unlink from symbol table...
44 ArgumentList.delete_all();
45 ArgumentList.setParent(0);
48 // Specialize setName to take care of symbol table majik
49 void Method::setName(const string &name, SymbolTable *ST) {
51 assert((ST == 0 || (!getParent() || ST == getParent()->getSymbolTable())) &&
52 "Invalid symtab argument!");
53 if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
55 if (P && getName() != "") P->getSymbolTableSure()->insert(this);
58 void Method::setParent(Module *parent) {
61 // Relink symbol tables together...
62 setParentSymTab(Parent ? Parent->getSymbolTableSure() : 0);
65 const Type *Method::getReturnType() const {
66 return ((const MethodType *)getType())->getReturnType();
69 // dropAllReferences() - This function causes all the subinstructions to "let
70 // go" of all references that they are maintaining. This allows one to
71 // 'delete' a whole class at a time, even though there may be circular
72 // references... first all references are dropped, and all use counts go to
73 // zero. Then everything is delete'd for real. Note that no operations are
74 // valid on an object that has "dropped all references", except operator
77 void Method::dropAllReferences() {
78 for_each(begin(), end(), std::mem_fun(&BasicBlock::dropAllReferences));
81 //===----------------------------------------------------------------------===//
82 // GlobalVariable Implementation
83 //===----------------------------------------------------------------------===//
85 GlobalVariable::GlobalVariable(const Type *Ty, const string &Name = "")
86 : Value(Ty, Value::GlobalVal, Name), Parent(0) {
87 assert(Ty->isPointerType() && // No unsized array pointers
88 (!Ty->dyncastPointerType()->isArrayType() ||
89 Ty->dyncastPointerType()->dyncastArrayType()->isSized()) &&
90 "Global Variables must be pointers to a sized type!");
93 // Specialize setName to take care of symbol table majik
94 void GlobalVariable::setName(const string &name, SymbolTable *ST) {
96 assert((ST == 0 || (!getParent() || ST == getParent()->getSymbolTable())) &&
97 "Invalid symtab argument!");
98 if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
100 if (P && getName() != "") P->getSymbolTableSure()->insert(this);