Reduce header inclusion in Expression.

[brucem]

Rebase forward.

include/lldb/Expression/ExpressionParser.h

 //===-- ExpressionParser.h --------------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef liblldb_ExpressionParser_h_
 #define liblldb_ExpressionParser_h_
 
 #include "lldb/lldb-public.h"
-#include "lldb/Core/ArchSpec.h"
 #include "lldb/Core/Error.h"
 
-#include <string>
-#include <vector>
-
 namespace lldb_private
 {
 
 class IRExecutionUnit;
     
 //----------------------------------------------------------------------
 /// @class ExpressionParser ExpressionParser.h "lldb/Expression/ExpressionParser.h"
 /// @brief Encapsulates an instance of a compiler that can parse expressions.

include/lldb/Expression/ExpressionVariable.h

 //===-- ExpressionVariable.h ------------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef liblldb_ExpressionVariable_h_
 #define liblldb_ExpressionVariable_h_
 
-// C Includes
-#include <signal.h>
-#include <stdint.h>
-#include <string.h>
-
 // C++ Includes
 #include <vector>
 
 // Other libraries and framework includes
 // Project includes
 #include "lldb/lldb-public.h"
 #include "lldb/Core/ConstString.h"
 #include "lldb/Core/ValueObject.h"

include/lldb/Expression/FunctionCaller.h

 
 // C Includes
 // C++ Includes
 #include <vector>
 #include <list>
 // Other libraries and framework includes
 // Project includes
 #include "lldb/Core/Address.h"
-#include "lldb/Core/ArchSpec.h"
 #include "lldb/Core/Value.h"
-#include "lldb/Core/ValueObjectList.h"
 #include "lldb/Expression/Expression.h"
 #include "lldb/Expression/ExpressionParser.h"
 #include "lldb/Symbol/CompilerType.h"
-#include "lldb/Target/Process.h"
 
 namespace lldb_private
 {
     
-class ClangExpressionParser;
-
 //----------------------------------------------------------------------
 /// @class FunctionCaller FunctionCaller.h "lldb/Expression/FunctionCaller.h"
 /// @brief Encapsulates a function that can be called.
 ///
 /// A given FunctionCaller object can handle a single function signature.
 /// Once constructed, it can set up any number of concurrent calls to
 /// functions with that signature.
 ///

include/lldb/Expression/IRInterpreter.h

 //===-- IRInterpreter.h -----------------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef liblldb_IRInterpreter_h_
 #define liblldb_IRInterpreter_h_
 
 #include "lldb/lldb-public.h"
 #include "lldb/Core/ConstString.h"
 #include "lldb/Core/Stream.h"
-#include "lldb/Symbol/TaggedASTType.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/Pass.h"
 
 namespace llvm {
     class Function;
     class Module;
 }
 

include/lldb/Expression/Materializer.h

 //===-- Materializer.h ------------------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef lldb_Materializer_h
 #define lldb_Materializer_h
 
 #include "lldb/lldb-private-types.h"
 #include "lldb/Core/Error.h"
 #include "lldb/Expression/IRMemoryMap.h"
-#include "lldb/Host/Mutex.h"
-#include "lldb/Symbol/SymbolContext.h"
+#include "lldb/Symbol/TaggedASTType.h"
 #include "lldb/Target/StackFrame.h"
 
 #include <vector>
 
 namespace lldb_private
 {
     
 class Materializer

include/lldb/Expression/UserExpression.h

 #define liblldb_UserExpression_h_
 
 // C Includes
 // C++ Includes
 #include <string>
 #include <map>
 #include <vector>
 
-// Other libraries and framework includes
-
-#include "llvm/ADT/ArrayRef.h"
-
 // Project includes
 
 #include "lldb/lldb-forward.h"
 #include "lldb/lldb-private.h"
 #include "lldb/Core/Address.h"
 #include "lldb/Expression/Expression.h"
 #include "lldb/Expression/Materializer.h"
-#include "lldb/Symbol/TaggedASTType.h"
 #include "lldb/Target/ExecutionContext.h"
 
 namespace lldb_private
 {
 
 //----------------------------------------------------------------------
 /// @class UserExpression UserExpression.h "lldb/Expression/UserExpression.h"
 /// @brief Encapsulates a one-time expression for use in lldb.

source/Expression/UtilityFunction.cpp

 #include "lldb/Core/Stream.h"
 #include "lldb/Core/StreamFile.h"
 #include "lldb/Expression/FunctionCaller.h"
 #include "lldb/Expression/UtilityFunction.h"
 #include "lldb/Expression/ExpressionSourceCode.h"
 #include "lldb/Expression/IRExecutionUnit.h"
 #include "lldb/Host/Host.h"
 #include "lldb/Target/ExecutionContext.h"
+#include "lldb/Target/Process.h"
 #include "lldb/Target/Target.h"
 
 using namespace lldb_private;
 using namespace lldb;
 
 //------------------------------------------------------------------
 /// Constructor
 ///

source/Plugins/ExpressionParser/Clang/ASTResultSynthesizer.h

 //===-- ASTResultSynthesizer.h ----------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef liblldb_ASTResultSynthesizer_h_
 #define liblldb_ASTResultSynthesizer_h_
 
 #include "clang/Sema/SemaConsumer.h"
 #include "lldb/Core/ClangForward.h"
-#include "lldb/Symbol/TaggedASTType.h"
+#include "lldb/Target/Target.h"
 
 namespace lldb_private {
 
 //----------------------------------------------------------------------
 /// @class ASTResultSynthesizer ASTResultSynthesizer.h "lldb/Expression/ASTResultSynthesizer.h"
 /// @brief Adds a result variable declaration to the ASTs for an expression.
 ///
 /// Users expect the expression "i + 3" to return a result, even if a result

source/Plugins/ExpressionParser/Clang/ClangExpressionParser.h

 #define liblldb_ClangExpressionParser_h_
 
 #include "lldb/lldb-public.h"
 #include "lldb/Core/ArchSpec.h"
 #include "lldb/Core/ClangForward.h"
 #include "lldb/Core/Error.h"
 #include "lldb/Expression/ExpressionParser.h"
 
-#include "IRForTarget.h"
-
 #include <string>
 #include <vector>
 
 namespace lldb_private
 {
 
 class IRExecutionUnit;
     

source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp

 //===-- ClangExpressionParser.cpp -------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "ClangExpressionParser.h"
 
 #include "ClangASTSource.h"
 #include "ClangExpressionHelper.h"
 #include "ClangExpressionDeclMap.h"
 #include "ClangModulesDeclVendor.h"
 #include "ClangPersistentVariables.h"
+#include "IRForTarget.h"
 
 #include "lldb/Core/ArchSpec.h"
 #include "lldb/Core/DataBufferHeap.h"
 #include "lldb/Core/Debugger.h"
 #include "lldb/Core/Disassembler.h"
 #include "lldb/Core/Log.h"
 #include "lldb/Core/Module.h"
 #include "lldb/Core/Stream.h"

source/Plugins/ExpressionParser/Clang/ClangUserExpression.h

 #include "IRForTarget.h"
 
 #include "lldb/lldb-forward.h"
 #include "lldb/lldb-private.h"
 #include "lldb/Core/Address.h"
 #include "lldb/Core/ClangForward.h"
 #include "lldb/Expression/UserExpression.h"
 #include "lldb/Expression/Materializer.h"
-#include "lldb/Symbol/TaggedASTType.h"
 #include "lldb/Target/ExecutionContext.h"
 
 namespace lldb_private
 {
 
 //----------------------------------------------------------------------
 /// @class ClangUserExpression ClangUserExpression.h "lldb/Expression/ClangUserExpression.h"
 /// @brief Encapsulates a single expression for use with Clang