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76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
//===-- Method.cpp - Implement the Method class ------------------*- C++ -*--=//
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//
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// This file implements the Method class for the VMCore 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/Method.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/iOther.h"
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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<MethodArgument, Method>;
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template class ValueHolder<BasicBlock , Method>;
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Method::Method(const MethodType *Ty, const string &name)
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: SymTabValue(Ty, Value::MethodVal, name), BasicBlocks(this),
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ArgumentList(this, this) {
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assert(Ty->isMethodType() && "Method signature must be of method type!");
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Parent = 0;
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}
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Method::~Method() {
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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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BasicBlocksType::iterator BI = BasicBlocks.begin();
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while ((BI = BasicBlocks.begin()) != BasicBlocks.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 Method::setName(const string &name) {
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Module *P;
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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 Method::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 Type *Method::getReturnType() const {
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return ((const MethodType *)getType())->getReturnType();
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}
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const MethodType *Method::getMethodType() const {
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return (const MethodType *)getType();
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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 Method::dropAllReferences() {
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for_each(BasicBlocks.begin(), BasicBlocks.end(),
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std::mem_fun(&BasicBlock::dropAllReferences));
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}
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