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//===-- Function.cpp - Implement the Global object classes -------*- C++ -*--=//
//
// This file implements the Function & GlobalVariable classes for the VMCore
// library.
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/DerivedTypes.h"
#include "llvm/iOther.h"
#include "llvm/Intrinsics.h"
#include "Support/LeakDetector.h"
#include "SymbolTableListTraitsImpl.h"
BasicBlock *ilist_traits<BasicBlock>::createNode() {
BasicBlock *Ret = new BasicBlock();
// This should not be garbage monitored.
LeakDetector::removeGarbageObject(Ret);
return Ret;
}
iplist<BasicBlock> &ilist_traits<BasicBlock>::getList(Function *F) {
return F->getBasicBlockList();
}
Argument *ilist_traits<Argument>::createNode() {
Argument *Ret = new Argument(Type::IntTy);
// This should not be garbage monitored.
LeakDetector::removeGarbageObject(Ret);
return Ret;
}
iplist<Argument> &ilist_traits<Argument>::getList(Function *F) {
return F->getArgumentList();
}
// Explicit instantiations of SymbolTableListTraits since some of the methods
// are not in the public header file...
template SymbolTableListTraits<Argument, Function, Function>;
template SymbolTableListTraits<BasicBlock, Function, Function>;
//===----------------------------------------------------------------------===//
// Argument Implementation
//===----------------------------------------------------------------------===//
Argument::Argument(const Type *Ty, const std::string &Name, Function *Par)
: Value(Ty, Value::ArgumentVal, Name) {
Parent = 0;
// Make sure that we get added to a function
LeakDetector::addGarbageObject(this);
if (Par)
Par->getArgumentList().push_back(this);
}
// Specialize setName to take care of symbol table majik
void Argument::setName(const std::string &name, SymbolTable *ST) {
Function *P;
assert((ST == 0 || (!getParent() || ST == &getParent()->getSymbolTable())) &&
"Invalid symtab argument!");
if ((P = getParent()) && hasName()) P->getSymbolTable().remove(this);
Value::setName(name);
if (P && hasName()) P->getSymbolTable().insert(this);
}
void Argument::setParent(Function *parent) {
if (getParent())
LeakDetector::addGarbageObject(this);
Parent = parent;
if (getParent())
LeakDetector::removeGarbageObject(this);
}
//===----------------------------------------------------------------------===//
// Function Implementation
//===----------------------------------------------------------------------===//
Function::Function(const FunctionType *Ty, LinkageTypes Linkage,
const std::string &name, Module *ParentModule)
: GlobalValue(PointerType::get(Ty), Value::FunctionVal, Linkage, name) {
BasicBlocks.setItemParent(this);
BasicBlocks.setParent(this);
ArgumentList.setItemParent(this);
ArgumentList.setParent(this);
SymTab = new SymbolTable();
// Create the arguments vector, all arguments start out unnamed.
for (unsigned i = 0, e = Ty->getNumParams(); i != e; ++i) {
assert(Ty->getParamType(i) != Type::VoidTy &&
"Cannot have void typed arguments!");
ArgumentList.push_back(new Argument(Ty->getParamType(i)));
}
// Make sure that we get added to a function
LeakDetector::addGarbageObject(this);
if (ParentModule)
ParentModule->getFunctionList().push_back(this);
}
Function::~Function() {
dropAllReferences(); // After this it is safe to delete instructions.
BasicBlocks.clear(); // Delete all basic blocks...
// Delete all of the method arguments and unlink from symbol table...
ArgumentList.clear();
ArgumentList.setParent(0);
delete SymTab;
}
// Specialize setName to take care of symbol table majik
void Function::setName(const std::string &name, SymbolTable *ST) {
Module *P;
assert((ST == 0 || (!getParent() || ST == &getParent()->getSymbolTable())) &&
"Invalid symtab argument!");
if ((P = getParent()) && hasName()) P->getSymbolTable().remove(this);
Value::setName(name);
if (P && getName() != "") P->getSymbolTable().insert(this);
}
void Function::setParent(Module *parent) {
if (getParent())
LeakDetector::addGarbageObject(this);
Parent = parent;
if (getParent())
LeakDetector::removeGarbageObject(this);
}
const FunctionType *Function::getFunctionType() const {
return cast<FunctionType>(getType()->getElementType());
}
const Type *Function::getReturnType() const {
return getFunctionType()->getReturnType();
}
// dropAllReferences() - This function causes all the subinstructions to "let
// go" of all references that they are maintaining. This allows one to
// 'delete' a whole class at a time, even though there may be circular
// references... first all references are dropped, and all use counts go to
// zero. Then everything is delete'd for real. Note that no operations are
// valid on an object that has "dropped all references", except operator
// delete.
//
void Function::dropAllReferences() {
for (iterator I = begin(), E = end(); I != E; ++I)
I->dropAllReferences();
}
/// getIntrinsicID - This method returns the ID number of the specified
/// function, or LLVMIntrinsic::not_intrinsic if the function is not an
/// instrinsic, or if the pointer is null. This value is always defined to be
/// zero to allow easy checking for whether a function is intrinsic or not. The
/// particular intrinsic functions which correspond to this value are defined in
/// llvm/Intrinsics.h.
///
unsigned Function::getIntrinsicID() const {
if (getName().size() <= 5 || getName()[4] != '.' || getName()[0] != 'l' ||
getName()[1] != 'l' || getName()[2] != 'v' || getName()[3] != 'm')
return 0; // All intrinsics start with 'llvm.'
switch (getName()[5]) {
case 'a':
if (getName() == "llvm.alpha.ctlz") return LLVMIntrinsic::alpha_ctlz;
if (getName() == "llvm.alpha.cttz") return LLVMIntrinsic::alpha_cttz;
if (getName() == "llvm.alpha.ctpop") return LLVMIntrinsic::alpha_ctpop;
if (getName() == "llvm.alpha.umulh") return LLVMIntrinsic::alpha_umulh;
break;
case 'l':
if (getName() == "llvm.longjmp") return LLVMIntrinsic::longjmp;
break;
case 's':
if (getName() == "llvm.setjmp") return LLVMIntrinsic::setjmp;
break;
case 'v':
if (getName() == "llvm.va_copy") return LLVMIntrinsic::va_copy;
if (getName() == "llvm.va_end") return LLVMIntrinsic::va_end;
if (getName() == "llvm.va_start") return LLVMIntrinsic::va_start;
break;
}
// The "llvm." namespace is reserved!
assert(0 && "Unknown LLVM intrinsic function!");
return 0;
}
//===----------------------------------------------------------------------===//
// GlobalVariable Implementation
//===----------------------------------------------------------------------===//
GlobalVariable::GlobalVariable(const Type *Ty, bool constant, LinkageTypes Link,
Constant *Initializer,
const std::string &Name, Module *ParentModule)
: GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal, Link, Name),
isConstantGlobal(constant) {
if (Initializer) Operands.push_back(Use((Value*)Initializer, this));
LeakDetector::addGarbageObject(this);
if (ParentModule)
ParentModule->getGlobalList().push_back(this);
}
void GlobalVariable::setParent(Module *parent) {
if (getParent())
LeakDetector::addGarbageObject(this);
Parent = parent;
if (getParent())
LeakDetector::removeGarbageObject(this);
}
// Specialize setName to take care of symbol table majik
void GlobalVariable::setName(const std::string &name, SymbolTable *ST) {
Module *P;
assert((ST == 0 || (!getParent() || ST == &getParent()->getSymbolTable())) &&
"Invalid symtab argument!");
if ((P = getParent()) && hasName()) P->getSymbolTable().remove(this);
Value::setName(name);
if (P && getName() != "") P->getSymbolTable().insert(this);
}
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