Import LLVM, at r72732.vendor/llvm/llvm-r72732

1 files changed, 381 insertions, 0 deletions

diff --git a/lib/VMCore/Module.cpp b/lib/VMCore/Module.cpp
new file mode 100644
index 000000000000..a598005e2a89
--- /dev/null
+++ b/lib/VMCore/Module.cpp
@@ -0,0 +1,381 @@
+//===-- Module.cpp - Implement the Module class ---------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Module class for the VMCore library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Module.h"
+#include "llvm/InstrTypes.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/LeakDetector.h"
+#include "SymbolTableListTraitsImpl.h"
+#include "llvm/TypeSymbolTable.h"
+#include <algorithm>
+#include <cstdarg>
+#include <cstdlib>
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// Methods to implement the globals and functions lists.
+//
+
+GlobalVariable *ilist_traits<GlobalVariable>::createSentinel() {
+  GlobalVariable *Ret = new GlobalVariable(Type::Int32Ty, false,
+                                           GlobalValue::ExternalLinkage);
+  // This should not be garbage monitored.
+  LeakDetector::removeGarbageObject(Ret);
+  return Ret;
+}
+GlobalAlias *ilist_traits<GlobalAlias>::createSentinel() {
+  GlobalAlias *Ret = new GlobalAlias(Type::Int32Ty,
+                                     GlobalValue::ExternalLinkage);
+  // This should not be garbage monitored.
+  LeakDetector::removeGarbageObject(Ret);
+  return Ret;
+}
+
+// Explicit instantiations of SymbolTableListTraits since some of the methods
+// are not in the public header file.
+template class SymbolTableListTraits<GlobalVariable, Module>;
+template class SymbolTableListTraits<Function, Module>;
+template class SymbolTableListTraits<GlobalAlias, Module>;
+
+//===----------------------------------------------------------------------===//
+// Primitive Module methods.
+//
+
+Module::Module(const std::string &MID)
+  : ModuleID(MID), DataLayout("") {
+  ValSymTab = new ValueSymbolTable();
+  TypeSymTab = new TypeSymbolTable();
+}
+
+Module::~Module() {
+  dropAllReferences();
+  GlobalList.clear();
+  FunctionList.clear();
+  AliasList.clear();
+  LibraryList.clear();
+  delete ValSymTab;
+  delete TypeSymTab;
+}
+
+/// Target endian information...
+Module::Endianness Module::getEndianness() const {
+  std::string temp = DataLayout;
+  Module::Endianness ret = AnyEndianness;
+  
+  while (!temp.empty()) {
+    std::string token = getToken(temp, "-");
+    
+    if (token[0] == 'e') {
+      ret = LittleEndian;
+    } else if (token[0] == 'E') {
+      ret = BigEndian;
+    }
+  }
+  
+  return ret;
+}
+
+/// Target Pointer Size information...
+Module::PointerSize Module::getPointerSize() const {
+  std::string temp = DataLayout;
+  Module::PointerSize ret = AnyPointerSize;
+  
+  while (!temp.empty()) {
+    std::string token = getToken(temp, "-");
+    char signal = getToken(token, ":")[0];
+    
+    if (signal == 'p') {
+      int size = atoi(getToken(token, ":").c_str());
+      if (size == 32)
+        ret = Pointer32;
+      else if (size == 64)
+        ret = Pointer64;
+    }
+  }
+  
+  return ret;
+}
+
+/// getNamedValue - Return the first global value in the module with
+/// the specified name, of arbitrary type.  This method returns null
+/// if a global with the specified name is not found.
+GlobalValue *Module::getNamedValue(const std::string &Name) const {
+  return cast_or_null<GlobalValue>(getValueSymbolTable().lookup(Name));
+}
+
+GlobalValue *Module::getNamedValue(const char *Name) const {
+  llvm::Value *V = getValueSymbolTable().lookup(Name, Name+strlen(Name));
+  return cast_or_null<GlobalValue>(V);
+}
+
+//===----------------------------------------------------------------------===//
+// Methods for easy access to the functions in the module.
+//
+
+// getOrInsertFunction - Look up the specified function in the module symbol
+// table.  If it does not exist, add a prototype for the function and return
+// it.  This is nice because it allows most passes to get away with not handling
+// the symbol table directly for this common task.
+//
+Constant *Module::getOrInsertFunction(const std::string &Name,
+                                      const FunctionType *Ty,
+                                      AttrListPtr AttributeList) {
+  // See if we have a definition for the specified function already.
+  GlobalValue *F = getNamedValue(Name);
+  if (F == 0) {
+    // Nope, add it
+    Function *New = Function::Create(Ty, GlobalVariable::ExternalLinkage, Name);
+    if (!New->isIntrinsic())       // Intrinsics get attrs set on construction
+      New->setAttributes(AttributeList);
+    FunctionList.push_back(New);
+    return New;                    // Return the new prototype.
+  }
+
+  // Okay, the function exists.  Does it have externally visible linkage?
+  if (F->hasLocalLinkage()) {
+    // Clear the function's name.
+    F->setName("");
+    // Retry, now there won't be a conflict.
+    Constant *NewF = getOrInsertFunction(Name, Ty);
+    F->setName(&Name[0], Name.size());
+    return NewF;
+  }
+
+  // If the function exists but has the wrong type, return a bitcast to the
+  // right type.
+  if (F->getType() != PointerType::getUnqual(Ty))
+    return ConstantExpr::getBitCast(F, PointerType::getUnqual(Ty));
+  
+  // Otherwise, we just found the existing function or a prototype.
+  return F;  
+}
+
+Constant *Module::getOrInsertTargetIntrinsic(const std::string &Name,
+                                             const FunctionType *Ty,
+                                             AttrListPtr AttributeList) {
+  // See if we have a definition for the specified function already.
+  GlobalValue *F = getNamedValue(Name);
+  if (F == 0) {
+    // Nope, add it
+    Function *New = Function::Create(Ty, GlobalVariable::ExternalLinkage, Name);
+    New->setAttributes(AttributeList);
+    FunctionList.push_back(New);
+    return New; // Return the new prototype.
+  }
+
+  // Otherwise, we just found the existing function or a prototype.
+  return F;  
+}
+
+Constant *Module::getOrInsertFunction(const std::string &Name,
+                                      const FunctionType *Ty) {
+  AttrListPtr AttributeList = AttrListPtr::get((AttributeWithIndex *)0, 0);
+  return getOrInsertFunction(Name, Ty, AttributeList);
+}
+
+// getOrInsertFunction - Look up the specified function in the module symbol
+// table.  If it does not exist, add a prototype for the function and return it.
+// This version of the method takes a null terminated list of function
+// arguments, which makes it easier for clients to use.
+//
+Constant *Module::getOrInsertFunction(const std::string &Name,
+                                      AttrListPtr AttributeList,
+                                      const Type *RetTy, ...) {
+  va_list Args;
+  va_start(Args, RetTy);
+
+  // Build the list of argument types...
+  std::vector<const Type*> ArgTys;
+  while (const Type *ArgTy = va_arg(Args, const Type*))
+    ArgTys.push_back(ArgTy);
+
+  va_end(Args);
+
+  // Build the function type and chain to the other getOrInsertFunction...
+  return getOrInsertFunction(Name, FunctionType::get(RetTy, ArgTys, false),
+                             AttributeList);
+}
+
+Constant *Module::getOrInsertFunction(const std::string &Name,
+                                      const Type *RetTy, ...) {
+  va_list Args;
+  va_start(Args, RetTy);
+
+  // Build the list of argument types...
+  std::vector<const Type*> ArgTys;
+  while (const Type *ArgTy = va_arg(Args, const Type*))
+    ArgTys.push_back(ArgTy);
+
+  va_end(Args);
+
+  // Build the function type and chain to the other getOrInsertFunction...
+  return getOrInsertFunction(Name, FunctionType::get(RetTy, ArgTys, false),
+                             AttrListPtr::get((AttributeWithIndex *)0, 0));
+}
+
+// getFunction - Look up the specified function in the module symbol table.
+// If it does not exist, return null.
+//
+Function *Module::getFunction(const std::string &Name) const {
+  return dyn_cast_or_null<Function>(getNamedValue(Name));
+}
+
+Function *Module::getFunction(const char *Name) const {
+  return dyn_cast_or_null<Function>(getNamedValue(Name));
+}
+
+//===----------------------------------------------------------------------===//
+// Methods for easy access to the global variables in the module.
+//
+
+/// getGlobalVariable - Look up the specified global variable in the module
+/// symbol table.  If it does not exist, return null.  The type argument
+/// should be the underlying type of the global, i.e., it should not have
+/// the top-level PointerType, which represents the address of the global.
+/// If AllowLocal is set to true, this function will return types that
+/// have an local. By default, these types are not returned.
+///
+GlobalVariable *Module::getGlobalVariable(const std::string &Name,
+                                          bool AllowLocal) const {
+  if (GlobalVariable *Result = 
+      dyn_cast_or_null<GlobalVariable>(getNamedValue(Name)))
+    if (AllowLocal || !Result->hasLocalLinkage())
+      return Result;
+  return 0;
+}
+
+/// getOrInsertGlobal - Look up the specified global in the module symbol table.
+///   1. If it does not exist, add a declaration of the global and return it.
+///   2. Else, the global exists but has the wrong type: return the function
+///      with a constantexpr cast to the right type.
+///   3. Finally, if the existing global is the correct delclaration, return the
+///      existing global.
+Constant *Module::getOrInsertGlobal(const std::string &Name, const Type *Ty) {
+  // See if we have a definition for the specified global already.
+  GlobalVariable *GV = dyn_cast_or_null<GlobalVariable>(getNamedValue(Name));
+  if (GV == 0) {
+    // Nope, add it
+    GlobalVariable *New =
+      new GlobalVariable(Ty, false, GlobalVariable::ExternalLinkage, 0, Name);
+    GlobalList.push_back(New);
+    return New;                    // Return the new declaration.
+  }
+
+  // If the variable exists but has the wrong type, return a bitcast to the
+  // right type.
+  if (GV->getType() != PointerType::getUnqual(Ty))
+    return ConstantExpr::getBitCast(GV, PointerType::getUnqual(Ty));
+  
+  // Otherwise, we just found the existing function or a prototype.
+  return GV;
+}
+
+//===----------------------------------------------------------------------===//
+// Methods for easy access to the global variables in the module.
+//
+
+// getNamedAlias - Look up the specified global in the module symbol table.
+// If it does not exist, return null.
+//
+GlobalAlias *Module::getNamedAlias(const std::string &Name) const {
+  return dyn_cast_or_null<GlobalAlias>(getNamedValue(Name));
+}
+
+//===----------------------------------------------------------------------===//
+// Methods for easy access to the types in the module.
+//
+
+
+// addTypeName - Insert an entry in the symbol table mapping Str to Type.  If
+// there is already an entry for this name, true is returned and the symbol
+// table is not modified.
+//
+bool Module::addTypeName(const std::string &Name, const Type *Ty) {
+  TypeSymbolTable &ST = getTypeSymbolTable();
+
+  if (ST.lookup(Name)) return true;  // Already in symtab...
+
+  // Not in symbol table?  Set the name with the Symtab as an argument so the
+  // type knows what to update...
+  ST.insert(Name, Ty);
+
+  return false;
+}
+
+/// getTypeByName - Return the type with the specified name in this module, or
+/// null if there is none by that name.
+const Type *Module::getTypeByName(const std::string &Name) const {
+  const TypeSymbolTable &ST = getTypeSymbolTable();
+  return cast_or_null<Type>(ST.lookup(Name));
+}
+
+// getTypeName - If there is at least one entry in the symbol table for the
+// specified type, return it.
+//
+std::string Module::getTypeName(const Type *Ty) const {
+  const TypeSymbolTable &ST = getTypeSymbolTable();
+
+  TypeSymbolTable::const_iterator TI = ST.begin();
+  TypeSymbolTable::const_iterator TE = ST.end();
+  if ( TI == TE ) return ""; // No names for types
+
+  while (TI != TE && TI->second != Ty)
+    ++TI;
+
+  if (TI != TE)  // Must have found an entry!
+    return TI->first;
+  return "";     // Must not have found anything...
+}
+
+//===----------------------------------------------------------------------===//
+// Other module related stuff.
+//
+
+
+// dropAllReferences() - This function causes all the subelementss to "let go"
+// of all references that they are maintaining.  This allows one to 'delete' a
+// whole module 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 deleted for real.  Note that no operations are valid on an object that
+// has "dropped all references", except operator delete.
+//
+void Module::dropAllReferences() {
+  for(Module::iterator I = begin(), E = end(); I != E; ++I)
+    I->dropAllReferences();
+
+  for(Module::global_iterator I = global_begin(), E = global_end(); I != E; ++I)
+    I->dropAllReferences();
+
+  for(Module::alias_iterator I = alias_begin(), E = alias_end(); I != E; ++I)
+    I->dropAllReferences();
+}
+
+void Module::addLibrary(const std::string& Lib) {
+  for (Module::lib_iterator I = lib_begin(), E = lib_end(); I != E; ++I)
+    if (*I == Lib)
+      return;
+  LibraryList.push_back(Lib);
+}
+
+void Module::removeLibrary(const std::string& Lib) {
+  LibraryListType::iterator I = LibraryList.begin();
+  LibraryListType::iterator E = LibraryList.end();
+  for (;I != E; ++I)
+    if (*I == Lib) {
+      LibraryList.erase(I);
+      return;
+    }
+}