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105 lines
3.8 KiB
C++
105 lines
3.8 KiB
C++
//===-- Function.cpp - Implement the Global object classes -------*- C++ -*--=//
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//
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// This file implements the Function & GlobalVariable classes for the VMCore
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// library.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ValueHolderImpl.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/Module.h"
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#include "llvm/Function.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/iOther.h"
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//===----------------------------------------------------------------------===//
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// Function Implementation
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//===----------------------------------------------------------------------===//
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// Instantiate Templates - This ugliness is the price we have to pay
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// for having a ValueHolderImpl.h file seperate from ValueHolder.h! :(
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//
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template class ValueHolder<FunctionArgument, Function, Function>;
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template class ValueHolder<BasicBlock , Function, Function>;
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Function::Function(const FunctionType *Ty, bool isInternal,
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const std::string &name)
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: GlobalValue(PointerType::get(Ty), Value::FunctionVal, isInternal, name),
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SymTabValue(this), BasicBlocks(this), ArgumentList(this, this) {
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}
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Function::~Function() {
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dropAllReferences(); // After this it is safe to delete instructions.
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// TODO: Should remove from the end, not the beginning of vector!
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iterator BI = begin();
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while ((BI = begin()) != end())
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delete BasicBlocks.remove(BI);
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// Delete all of the method arguments and unlink from symbol table...
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ArgumentList.delete_all();
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ArgumentList.setParent(0);
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}
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// Specialize setName to take care of symbol table majik
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void Function::setName(const std::string &name, SymbolTable *ST) {
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Module *P;
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assert((ST == 0 || (!getParent() || ST == getParent()->getSymbolTable())) &&
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"Invalid symtab argument!");
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if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
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Value::setName(name);
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if (P && getName() != "") P->getSymbolTableSure()->insert(this);
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}
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void Function::setParent(Module *parent) {
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Parent = parent;
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// Relink symbol tables together...
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setParentSymTab(Parent ? Parent->getSymbolTableSure() : 0);
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}
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const FunctionType *Function::getFunctionType() const {
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return cast<FunctionType>(getType()->getElementType());
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}
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const Type *Function::getReturnType() const {
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return getFunctionType()->getReturnType();
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}
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// dropAllReferences() - This function causes all the subinstructions to "let
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// go" of all references that they are maintaining. This allows one to
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// 'delete' a whole class at a time, even though there may be circular
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// references... first all references are dropped, and all use counts go to
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// zero. Then everything is delete'd for real. Note that no operations are
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// valid on an object that has "dropped all references", except operator
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// delete.
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//
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void Function::dropAllReferences() {
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for_each(begin(), end(), std::mem_fun(&BasicBlock::dropAllReferences));
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}
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//===----------------------------------------------------------------------===//
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// GlobalVariable Implementation
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//===----------------------------------------------------------------------===//
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GlobalVariable::GlobalVariable(const Type *Ty, bool constant, bool isIntern,
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Constant *Initializer = 0,
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const std::string &Name = "")
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: GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal, isIntern, Name),
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isConstantGlobal(constant) {
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if (Initializer) Operands.push_back(Use((Value*)Initializer, this));
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}
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// Specialize setName to take care of symbol table majik
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void GlobalVariable::setName(const std::string &name, SymbolTable *ST) {
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Module *P;
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assert((ST == 0 || (!getParent() || ST == getParent()->getSymbolTable())) &&
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"Invalid symtab argument!");
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if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
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Value::setName(name);
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if (P && getName() != "") P->getSymbolTableSure()->insert(this);
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}
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