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292 lines
11 KiB
C++
292 lines
11 KiB
C++
//===-- Function.cpp - Implement the Global object classes ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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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/Module.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/iOther.h"
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#include "llvm/Intrinsics.h"
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#include "Support/LeakDetector.h"
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#include "SymbolTableListTraitsImpl.h"
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using namespace llvm;
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BasicBlock *ilist_traits<BasicBlock>::createNode() {
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BasicBlock *Ret = new BasicBlock();
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// This should not be garbage monitored.
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LeakDetector::removeGarbageObject(Ret);
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return Ret;
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}
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iplist<BasicBlock> &ilist_traits<BasicBlock>::getList(Function *F) {
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return F->getBasicBlockList();
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}
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Argument *ilist_traits<Argument>::createNode() {
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Argument *Ret = new Argument(Type::IntTy);
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// This should not be garbage monitored.
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LeakDetector::removeGarbageObject(Ret);
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return Ret;
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}
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iplist<Argument> &ilist_traits<Argument>::getList(Function *F) {
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return F->getArgumentList();
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}
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// Explicit instantiations of SymbolTableListTraits since some of the methods
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// are not in the public header file...
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template class SymbolTableListTraits<Argument, Function, Function>;
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template class SymbolTableListTraits<BasicBlock, Function, Function>;
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//===----------------------------------------------------------------------===//
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// Argument Implementation
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//===----------------------------------------------------------------------===//
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Argument::Argument(const Type *Ty, const std::string &Name, Function *Par)
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: Value(Ty, Value::ArgumentVal, Name) {
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Parent = 0;
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// Make sure that we get added to a function
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LeakDetector::addGarbageObject(this);
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if (Par)
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Par->getArgumentList().push_back(this);
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}
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// Specialize setName to take care of symbol table majik
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void Argument::setName(const std::string &name, SymbolTable *ST) {
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Function *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 && hasName()) P->getSymbolTable().insert(this);
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}
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void Argument::setParent(Function *parent) {
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if (getParent())
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LeakDetector::addGarbageObject(this);
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Parent = parent;
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if (getParent())
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LeakDetector::removeGarbageObject(this);
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}
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//===----------------------------------------------------------------------===//
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// Function Implementation
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//===----------------------------------------------------------------------===//
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Function::Function(const FunctionType *Ty, LinkageTypes Linkage,
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const std::string &name, Module *ParentModule)
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: GlobalValue(PointerType::get(Ty), Value::FunctionVal, Linkage, name) {
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BasicBlocks.setItemParent(this);
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BasicBlocks.setParent(this);
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ArgumentList.setItemParent(this);
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ArgumentList.setParent(this);
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SymTab = new SymbolTable();
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assert((getReturnType()->isFirstClassType() ||getReturnType() == Type::VoidTy)
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&& "LLVM functions cannot return aggregate values!");
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// Create the arguments vector, all arguments start out unnamed.
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for (unsigned i = 0, e = Ty->getNumParams(); i != e; ++i) {
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assert(Ty->getParamType(i) != Type::VoidTy &&
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"Cannot have void typed arguments!");
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ArgumentList.push_back(new Argument(Ty->getParamType(i)));
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}
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// Make sure that we get added to a function
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LeakDetector::addGarbageObject(this);
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if (ParentModule)
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ParentModule->getFunctionList().push_back(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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// Delete all of the method arguments and unlink from symbol table...
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ArgumentList.clear();
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ArgumentList.setParent(0);
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delete SymTab;
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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 && hasName()) P->getSymbolTable().insert(this);
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}
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void Function::setParent(Module *parent) {
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if (getParent())
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LeakDetector::addGarbageObject(this);
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Parent = parent;
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if (getParent())
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LeakDetector::removeGarbageObject(this);
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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 deleted 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 (iterator I = begin(), E = end(); I != E; ++I)
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I->dropAllReferences();
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BasicBlocks.clear(); // Delete all basic blocks...
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}
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/// getIntrinsicID - This method returns the ID number of the specified
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/// function, or Intrinsic::not_intrinsic if the function is not an
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/// intrinsic, or if the pointer is null. This value is always defined to be
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/// zero to allow easy checking for whether a function is intrinsic or not. The
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/// particular intrinsic functions which correspond to this value are defined in
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/// llvm/Intrinsics.h.
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///
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unsigned Function::getIntrinsicID() const {
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if (getName().size() < 5 || getName()[4] != '.' || getName()[0] != 'l' ||
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getName()[1] != 'l' || getName()[2] != 'v' || getName()[3] != 'm')
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return 0; // All intrinsics start with 'llvm.'
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assert(getName().size() != 5 && "'llvm.' is an invalid intrinsic name!");
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// a table of all Alpha intrinsic functions
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struct {
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std::string name; // The name of the intrinsic
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unsigned id; // Its ID number
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} alpha_intrinsics[] = {
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{ "llvm.alpha.ctlz", Intrinsic::alpha_ctlz },
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{ "llvm.alpha.cttz", Intrinsic::alpha_cttz },
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{ "llvm.alpha.ctpop", Intrinsic::alpha_ctpop },
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{ "llvm.alpha.umulh", Intrinsic::alpha_umulh },
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{ "llvm.alpha.vecop", Intrinsic::alpha_vecop },
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{ "llvm.alpha.pup", Intrinsic::alpha_pup },
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{ "llvm.alpha.bytezap", Intrinsic::alpha_bytezap },
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{ "llvm.alpha.bytemanip", Intrinsic::alpha_bytemanip },
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{ "llvm.alpha.dfp_bop", Intrinsic::alpha_dfpbop },
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{ "llvm.alpha.dfp_uop", Intrinsic::alpha_dfpuop },
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{ "llvm.alpha.unordered", Intrinsic::alpha_unordered },
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{ "llvm.alpha.uqtodfp", Intrinsic::alpha_uqtodfp },
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{ "llvm.alpha.uqtosfp", Intrinsic::alpha_uqtosfp },
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{ "llvm.alpha.dfptosq", Intrinsic::alpha_dfptosq },
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{ "llvm.alpha.sfptosq", Intrinsic::alpha_sfptosq },
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};
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const unsigned num_alpha_intrinsics =
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sizeof(alpha_intrinsics) / sizeof(*alpha_intrinsics);
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switch (getName()[5]) {
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case 'a':
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if (getName().size() > 11 &&
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std::string(getName().begin()+4, getName().begin()+11) == ".alpha.")
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for (unsigned i = 0; i < num_alpha_intrinsics; ++i)
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if (getName() == alpha_intrinsics[i].name)
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return alpha_intrinsics[i].id;
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break;
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case 'd':
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if (getName() == "llvm.dbg.stoppoint") return Intrinsic::dbg_stoppoint;
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if (getName() == "llvm.dbg.region.start")return Intrinsic::dbg_region_start;
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if (getName() == "llvm.dbg.region.end") return Intrinsic::dbg_region_end;
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if (getName() == "llvm.dbg.func.start") return Intrinsic::dbg_func_start;
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if (getName() == "llvm.dbg.declare") return Intrinsic::dbg_declare;
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break;
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case 'f':
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if (getName() == "llvm.frameaddress") return Intrinsic::frameaddress;
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break;
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case 'g':
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if (getName() == "llvm.gcwrite") return Intrinsic::gcwrite;
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if (getName() == "llvm.gcread") return Intrinsic::gcread;
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if (getName() == "llvm.gcroot") return Intrinsic::gcroot;
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break;
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case 'l':
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if (getName() == "llvm.longjmp") return Intrinsic::longjmp;
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break;
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case 'm':
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if (getName() == "llvm.memcpy") return Intrinsic::memcpy;
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if (getName() == "llvm.memmove") return Intrinsic::memmove;
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if (getName() == "llvm.memset") return Intrinsic::memset;
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break;
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case 'r':
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if (getName() == "llvm.returnaddress") return Intrinsic::returnaddress;
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if (getName() == "llvm.readport") return Intrinsic::readport;
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if (getName() == "llvm.readio") return Intrinsic::readio;
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break;
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case 's':
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if (getName() == "llvm.setjmp") return Intrinsic::setjmp;
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if (getName() == "llvm.sigsetjmp") return Intrinsic::sigsetjmp;
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if (getName() == "llvm.siglongjmp") return Intrinsic::siglongjmp;
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break;
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case 'v':
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if (getName() == "llvm.va_copy") return Intrinsic::vacopy;
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if (getName() == "llvm.va_end") return Intrinsic::vaend;
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if (getName() == "llvm.va_start") return Intrinsic::vastart;
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case 'w':
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if (getName() == "llvm.writeport") return Intrinsic::writeport;
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if (getName() == "llvm.writeio") return Intrinsic::writeio;
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break;
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}
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// The "llvm." namespace is reserved!
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assert(0 && "Unknown LLVM intrinsic function!");
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return 0;
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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, LinkageTypes Link,
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Constant *Initializer,
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const std::string &Name, Module *ParentModule)
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: GlobalValue(PointerType::get(Ty), Value::GlobalVariableVal, Link, Name),
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isConstantGlobal(constant) {
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if (Initializer) Operands.push_back(Use((Value*)Initializer, this));
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LeakDetector::addGarbageObject(this);
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if (ParentModule)
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ParentModule->getGlobalList().push_back(this);
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}
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void GlobalVariable::setParent(Module *parent) {
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if (getParent())
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LeakDetector::addGarbageObject(this);
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Parent = parent;
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if (getParent())
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LeakDetector::removeGarbageObject(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 && hasName()) P->getSymbolTable().insert(this);
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}
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