Initial revision

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/ModuleAnalyzer.cpp

@@ -0,0 +1,150 @@
+//===-- llvm/Analysis/ModuleAnalyzer.cpp - Module analysis driver ----------==//
+//
+// This class provides a nice interface to traverse a module in a predictable
+// way.  This is used by the AssemblyWriter, BytecodeWriter, and SlotCalculator
+// to do analysis of a module.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/ModuleAnalyzer.h"
+#include "llvm/ConstantPool.h"
+#include "llvm/Method.h"
+#include "llvm/Module.h"
+#include "llvm/BasicBlock.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/ConstPoolVals.h"
+#include <map>
+
+// processModule - Driver function to call all of my subclasses virtual methods.
+//
+bool ModuleAnalyzer::processModule(const Module *M) {
+  // Loop over the constant pool, process all of the constants...
+  if (processConstPool(M->getConstantPool(), false))
+    return true;
+
+  return processMethods(M);
+}
+
+inline bool ModuleAnalyzer::handleType(set<const Type *> &TypeSet, 
+				       const Type *T) {
+  if (!T->isDerivedType()) return false;    // Boring boring types...
+  if (TypeSet.count(T) != 0) return false;  // Already found this type...
+  TypeSet.insert(T);                        // Add it to the set
+  
+  // Recursively process interesting types...
+  switch (T->getPrimitiveID()) {
+  case Type::MethodTyID: {
+    const MethodType *MT = (const MethodType *)T;
+    if (handleType(TypeSet, MT->getReturnType())) return true;
+    const MethodType::ParamTypes &Params = MT->getParamTypes();
+
+    for (MethodType::ParamTypes::const_iterator I = Params.begin();
+	 I != Params.end(); ++I)
+      if (handleType(TypeSet, *I)) return true;
+    break;
+  }
+
+  case Type::ArrayTyID:
+    if (handleType(TypeSet, ((const ArrayType *)T)->getElementType()))
+      return true;
+    break;
+
+  case Type::StructTyID: {
+    const StructType *ST = (const StructType*)T;
+    const StructType::ElementTypes &Elements = ST->getElementTypes();
+    for (StructType::ElementTypes::const_iterator I = Elements.begin();
+	 I != Elements.end(); ++I)
+      if (handleType(TypeSet, *I)) return true;
+    break;
+  }
+
+  case Type::PointerTyID:
+    if (handleType(TypeSet, ((const PointerType *)T)->getValueType()))
+      return true;
+    break;
+
+  default:
+    cerr << "ModuleAnalyzer::handleType, type unknown: '" 
+	 << T->getName() << "'\n";
+    break;
+  }
+
+  return processType(T);
+}
+
+
+bool ModuleAnalyzer::processConstPool(const ConstantPool &CP, bool isMethod) {
+  // TypeSet - Keep track of which types have already been processType'ed.  We 
+  // don't want to reprocess the same type more than once.
+  //
+  set<const Type *> TypeSet;
+
+  for (ConstantPool::plane_const_iterator PI = CP.begin(); 
+       PI != CP.end(); ++PI) {
+    const ConstantPool::PlaneType &Plane = **PI;
+    if (Plane.empty()) continue;        // Skip empty type planes...
+
+    if (processConstPoolPlane(CP, Plane, isMethod)) return true;
+
+    for (ConstantPool::PlaneType::const_iterator CI = Plane.begin(); 
+	 CI != Plane.end(); CI++) {
+      if ((*CI)->getType() == Type::TypeTy)
+	if (handleType(TypeSet, ((const ConstPoolType*)(*CI))->getValue())) 
+	  return true;
+      if (handleType(TypeSet, (*CI)->getType())) return true;
+
+      if (processConstant(*CI)) return true;
+    }
+  }
+  
+  if (!isMethod) {
+    assert(CP.getParent()->getValueType() == Value::ModuleVal);
+    const Module *M = (const Module*)CP.getParent();
+    // Process the method types after the constant pool...
+    for (Module::MethodListType::const_iterator I = M->getMethodList().begin();
+	 I != M->getMethodList().end(); I++) {
+      if (handleType(TypeSet, (*I)->getType())) return true;
+      if (visitMethod(*I)) return true;
+    }
+  }
+  return false;
+}
+
+bool ModuleAnalyzer::processMethods(const Module *M) {
+  for (Module::MethodListType::const_iterator I = M->getMethodList().begin();
+       I != M->getMethodList().end(); I++)
+    if (processMethod(*I)) return true;
+
+  return false;
+}
+
+bool ModuleAnalyzer::processMethod(const Method *M) {
+  // Loop over the arguments, processing them...
+  const Method::ArgumentListType &ArgList = M->getArgumentList();
+  for (Method::ArgumentListType::const_iterator AI = ArgList.begin(); 
+       AI != ArgList.end(); AI++)
+    if (processMethodArgument(*AI)) return true;
+
+  // Loop over the constant pool, adding the constants to the table...
+  processConstPool(M->getConstantPool(), true);
+  
+  // Loop over all the basic blocks, in order...
+  Method::BasicBlocksType::const_iterator BBI = M->getBasicBlocks().begin();
+  for (; BBI != M->getBasicBlocks().end(); BBI++) 
+    if (processBasicBlock(*BBI)) return true;
+  return false;
+}
+
+bool ModuleAnalyzer::processBasicBlock(const BasicBlock *BB) {
+  // Process all of the instructions in the basic block
+  BasicBlock::InstListType::const_iterator Inst = BB->getInstList().begin();
+  for (; Inst != BB->getInstList().end(); Inst++) {
+    if (preProcessInstruction(*Inst) || processInstruction(*Inst)) return true;
+  }
+  return false;
+}
+
+bool ModuleAnalyzer::preProcessInstruction(const Instruction *I) {
+  
+  return false;
+}