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"
16 #include "llvm/CodeGen/MachineInstr.h"
18 //===----------------------------------------------------------------------===//
19 // Method Implementation
20 //===----------------------------------------------------------------------===//
23 // Instantiate Templates - This ugliness is the price we have to pay
24 // for having a ValueHolderImpl.h file seperate from ValueHolder.h! :(
26 template class ValueHolder<MethodArgument, Method, Method>;
27 template class ValueHolder<BasicBlock , Method, Method>;
29 Method::Method(const MethodType *Ty, const string &name)
30 : GlobalValue(PointerType::get(Ty), Value::MethodVal, name),
31 SymTabValue(this), BasicBlocks(this), ArgumentList(this, this),
32 machineCode(new MachineCodeForMethod(this)) {
33 assert(::isa<MethodType>(Ty) && "Method signature must be of method type!");
37 dropAllReferences(); // After this it is safe to delete instructions.
39 // TODO: Should remove from the end, not the beginning of vector!
40 iterator BI = begin();
41 while ((BI = begin()) != end())
42 delete BasicBlocks.remove(BI);
44 // Delete all of the method arguments and unlink from symbol table...
45 ArgumentList.delete_all();
46 ArgumentList.setParent(0);
49 // Specialize setName to take care of symbol table majik
50 void Method::setName(const string &name, SymbolTable *ST) {
52 assert((ST == 0 || (!getParent() || ST == getParent()->getSymbolTable())) &&
53 "Invalid symtab argument!");
54 if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
56 if (P && getName() != "") P->getSymbolTableSure()->insert(this);
59 void Method::setParent(Module *parent) {
62 // Relink symbol tables together...
63 setParentSymTab(Parent ? Parent->getSymbolTableSure() : 0);
66 const MethodType *Method::getMethodType() const {
67 return cast<MethodType>(cast<PointerType>(getType())->getValueType());
70 const Type *Method::getReturnType() const {
71 return getMethodType()->getReturnType();
74 // dropAllReferences() - This function causes all the subinstructions to "let
75 // go" of all references that they are maintaining. This allows one to
76 // 'delete' a whole class at a time, even though there may be circular
77 // references... first all references are dropped, and all use counts go to
78 // zero. Then everything is delete'd for real. Note that no operations are
79 // valid on an object that has "dropped all references", except operator
82 void Method::dropAllReferences() {
83 for_each(begin(), end(), std::mem_fun(&BasicBlock::dropAllReferences));
86 //===----------------------------------------------------------------------===//
87 // GlobalVariable Implementation
88 //===----------------------------------------------------------------------===//
90 GlobalVariable::GlobalVariable(const Type *Ty, bool isConstant,
91 ConstPoolVal *Initializer = 0,
92 const string &Name = "")
93 : GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal, Name),
94 Constant(isConstant) {
95 if (Initializer) Operands.push_back(Use((Value*)Initializer, this));
98 // Specialize setName to take care of symbol table majik
99 void GlobalVariable::setName(const string &name, SymbolTable *ST) {
101 assert((ST == 0 || (!getParent() || ST == getParent()->getSymbolTable())) &&
102 "Invalid symtab argument!");
103 if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
104 Value::setName(name);
105 if (P && getName() != "") P->getSymbolTableSure()->insert(this);