mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19892 91177308-0d34-0410-b5e6-96231b3b80d8
308 lines
11 KiB
C++
308 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/IntrinsicInst.h"
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#include "llvm/Support/LeakDetector.h"
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#include "SymbolTableListTraitsImpl.h"
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#include "llvm/ADT/StringExtras.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, 0, 0, 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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bool Function::isVarArg() const {
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return getFunctionType()->isVarArg();
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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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void Function::removeFromParent() {
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getParent()->getFunctionList().remove(this);
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}
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void Function::eraseFromParent() {
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getParent()->getFunctionList().erase(this);
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}
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/// renameLocalSymbols - This method goes through the Function's symbol table
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/// and renames any symbols that conflict with symbols at global scope. This is
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/// required before printing out to a textual form, to ensure that there is no
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/// ambiguity when parsing.
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void Function::renameLocalSymbols() {
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SymbolTable &LST = getSymbolTable(); // Local Symtab
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SymbolTable &GST = getParent()->getSymbolTable(); // Global Symtab
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for (SymbolTable::plane_iterator LPI = LST.plane_begin(), E = LST.plane_end();
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LPI != E; ++LPI)
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// All global symbols are of pointer type, ignore any non-pointer planes.
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if (isa<PointerType>(LPI->first)) {
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// Only check if the global plane has any symbols of this type.
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SymbolTable::plane_iterator GPI = GST.find(LPI->first);
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if (GPI != GST.plane_end()) {
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SymbolTable::ValueMap &LVM = LPI->second;
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const SymbolTable::ValueMap &GVM = GPI->second;
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// Loop over all local symbols, renaming those that are in the global
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// symbol table already.
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for (SymbolTable::value_iterator VI = LVM.begin(), E = LVM.end();
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VI != E;) {
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Value *V = VI->second;
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const std::string &Name = VI->first;
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++VI;
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if (GVM.count(Name)) {
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static unsigned UniqueNum = 0;
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// Find a name that does not conflict!
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while (GVM.count(Name + "_" + utostr(++UniqueNum)) ||
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LVM.count(Name + "_" + utostr(UniqueNum)))
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/* scan for UniqueNum that works */;
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V->setName(Name + "_" + utostr(UniqueNum));
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}
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}
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}
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}
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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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switch (getName()[5]) {
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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 'i':
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if (getName() == "llvm.isunordered") return Intrinsic::isunordered;
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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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Value *IntrinsicInst::StripPointerCasts(Value *Ptr) {
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if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Ptr)) {
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if (CE->getOpcode() == Instruction::Cast) {
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if (isa<PointerType>(CE->getOperand(0)->getType()))
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return StripPointerCasts(CE->getOperand(0));
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} else if (CE->getOpcode() == Instruction::GetElementPtr) {
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for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
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if (!CE->getOperand(i)->isNullValue())
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return Ptr;
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return StripPointerCasts(CE->getOperand(0));
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}
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return Ptr;
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}
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if (CastInst *CI = dyn_cast<CastInst>(Ptr)) {
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if (isa<PointerType>(CI->getOperand(0)->getType()))
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return StripPointerCasts(CI->getOperand(0));
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} else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Ptr)) {
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for (unsigned i = 1, e = GEP->getNumOperands(); i != e; ++i)
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if (!isa<Constant>(GEP->getOperand(i)) ||
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!cast<Constant>(GEP->getOperand(i))->isNullValue())
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return Ptr;
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return StripPointerCasts(GEP->getOperand(0));
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}
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return Ptr;
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}
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// vim: sw=2 ai
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