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@2 91177308-0d34-0410-b5e6-96231b3b80d8
151 lines
4.9 KiB
C++
151 lines
4.9 KiB
C++
//===-- llvm/Analysis/ModuleAnalyzer.cpp - Module analysis driver ----------==//
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//
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// This class provides a nice interface to traverse a module in a predictable
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// way. This is used by the AssemblyWriter, BytecodeWriter, and SlotCalculator
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// to do analysis of a module.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/ModuleAnalyzer.h"
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#include "llvm/ConstantPool.h"
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#include "llvm/Method.h"
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#include "llvm/Module.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/ConstPoolVals.h"
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#include <map>
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// processModule - Driver function to call all of my subclasses virtual methods.
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//
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bool ModuleAnalyzer::processModule(const Module *M) {
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// Loop over the constant pool, process all of the constants...
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if (processConstPool(M->getConstantPool(), false))
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return true;
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return processMethods(M);
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}
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inline bool ModuleAnalyzer::handleType(set<const Type *> &TypeSet,
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const Type *T) {
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if (!T->isDerivedType()) return false; // Boring boring types...
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if (TypeSet.count(T) != 0) return false; // Already found this type...
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TypeSet.insert(T); // Add it to the set
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// Recursively process interesting types...
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switch (T->getPrimitiveID()) {
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case Type::MethodTyID: {
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const MethodType *MT = (const MethodType *)T;
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if (handleType(TypeSet, MT->getReturnType())) return true;
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const MethodType::ParamTypes &Params = MT->getParamTypes();
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for (MethodType::ParamTypes::const_iterator I = Params.begin();
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I != Params.end(); ++I)
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if (handleType(TypeSet, *I)) return true;
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break;
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}
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case Type::ArrayTyID:
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if (handleType(TypeSet, ((const ArrayType *)T)->getElementType()))
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return true;
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break;
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case Type::StructTyID: {
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const StructType *ST = (const StructType*)T;
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const StructType::ElementTypes &Elements = ST->getElementTypes();
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for (StructType::ElementTypes::const_iterator I = Elements.begin();
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I != Elements.end(); ++I)
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if (handleType(TypeSet, *I)) return true;
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break;
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}
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case Type::PointerTyID:
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if (handleType(TypeSet, ((const PointerType *)T)->getValueType()))
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return true;
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break;
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default:
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cerr << "ModuleAnalyzer::handleType, type unknown: '"
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<< T->getName() << "'\n";
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break;
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}
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return processType(T);
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}
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bool ModuleAnalyzer::processConstPool(const ConstantPool &CP, bool isMethod) {
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// TypeSet - Keep track of which types have already been processType'ed. We
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// don't want to reprocess the same type more than once.
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//
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set<const Type *> TypeSet;
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for (ConstantPool::plane_const_iterator PI = CP.begin();
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PI != CP.end(); ++PI) {
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const ConstantPool::PlaneType &Plane = **PI;
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if (Plane.empty()) continue; // Skip empty type planes...
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if (processConstPoolPlane(CP, Plane, isMethod)) return true;
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for (ConstantPool::PlaneType::const_iterator CI = Plane.begin();
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CI != Plane.end(); CI++) {
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if ((*CI)->getType() == Type::TypeTy)
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if (handleType(TypeSet, ((const ConstPoolType*)(*CI))->getValue()))
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return true;
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if (handleType(TypeSet, (*CI)->getType())) return true;
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if (processConstant(*CI)) return true;
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}
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}
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if (!isMethod) {
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assert(CP.getParent()->getValueType() == Value::ModuleVal);
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const Module *M = (const Module*)CP.getParent();
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// Process the method types after the constant pool...
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for (Module::MethodListType::const_iterator I = M->getMethodList().begin();
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I != M->getMethodList().end(); I++) {
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if (handleType(TypeSet, (*I)->getType())) return true;
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if (visitMethod(*I)) return true;
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}
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}
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return false;
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}
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bool ModuleAnalyzer::processMethods(const Module *M) {
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for (Module::MethodListType::const_iterator I = M->getMethodList().begin();
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I != M->getMethodList().end(); I++)
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if (processMethod(*I)) return true;
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return false;
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}
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bool ModuleAnalyzer::processMethod(const Method *M) {
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// Loop over the arguments, processing them...
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const Method::ArgumentListType &ArgList = M->getArgumentList();
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for (Method::ArgumentListType::const_iterator AI = ArgList.begin();
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AI != ArgList.end(); AI++)
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if (processMethodArgument(*AI)) return true;
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// Loop over the constant pool, adding the constants to the table...
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processConstPool(M->getConstantPool(), true);
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// Loop over all the basic blocks, in order...
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Method::BasicBlocksType::const_iterator BBI = M->getBasicBlocks().begin();
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for (; BBI != M->getBasicBlocks().end(); BBI++)
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if (processBasicBlock(*BBI)) return true;
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return false;
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}
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bool ModuleAnalyzer::processBasicBlock(const BasicBlock *BB) {
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// Process all of the instructions in the basic block
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BasicBlock::InstListType::const_iterator Inst = BB->getInstList().begin();
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for (; Inst != BB->getInstList().end(); Inst++) {
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if (preProcessInstruction(*Inst) || processInstruction(*Inst)) return true;
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}
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return false;
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}
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bool ModuleAnalyzer::preProcessInstruction(const Instruction *I) {
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return false;
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}
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