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diff --git a/include/clang/Frontend/CodeGenOptions.h b/include/clang/Frontend/CodeGenOptions.h
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index 0000000000000..2918f4e9d3cb3
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+++ b/include/clang/Frontend/CodeGenOptions.h
@@ -0,0 +1,141 @@
+//===--- CodeGenOptions.h ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defines the CodeGenOptions interface.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_FRONTEND_CODEGENOPTIONS_H
+#define LLVM_CLANG_FRONTEND_CODEGENOPTIONS_H
+
+#include <string>
+
+namespace clang {
+
+/// CodeGenOptions - Track various options which control how the code
+/// is optimized and passed to the backend.
+class CodeGenOptions {
+public:
+  enum InliningMethod {
+    NoInlining,         // Perform no inlining whatsoever.
+    NormalInlining,     // Use the standard function inlining pass.
+    OnlyAlwaysInlining  // Only run the always inlining pass.
+  };
+
+  enum ObjCDispatchMethodKind {
+    Legacy = 0,
+    NonLegacy = 1,
+    Mixed = 2
+  };
+
+  unsigned AsmVerbose        : 1; /// -dA, -fverbose-asm.
+  unsigned CXAAtExit         : 1; /// Use __cxa_atexit for calling destructors.
+  unsigned CXXCtorDtorAliases: 1; /// Emit complete ctors/dtors as linker
+                                  /// aliases to base ctors when possible.
+  unsigned DataSections      : 1; /// Set when -fdata-sections is enabled
+  unsigned DebugInfo         : 1; /// Should generate debug info (-g).
+  unsigned DisableFPElim     : 1; /// Set when -fomit-frame-pointer is enabled.
+  unsigned DisableLLVMOpts   : 1; /// Don't run any optimizations, for use in
+                                  /// getting .bc files that correspond to the
+                                  /// internal state before optimizations are
+                                  /// done.
+  unsigned DisableRedZone    : 1; /// Set when -mno-red-zone is enabled.
+  unsigned FunctionSections  : 1; /// Set when -ffunction-sections is enabled
+  unsigned InstrumentFunctions : 1; /// Set when -finstrument-functions is enabled
+  unsigned MergeAllConstants : 1; /// Merge identical constants.
+  unsigned NoCommon          : 1; /// Set when -fno-common or C++ is enabled.
+  unsigned NoImplicitFloat   : 1; /// Set when -mno-implicit-float is enabled.
+  unsigned NoZeroInitializedInBSS : 1; /// -fno-zero-initialized-in-bss
+  unsigned ObjCDispatchMethod : 2; /// Method of Objective-C dispatch to use.
+  unsigned OmitLeafFramePointer : 1; /// Set when -momit-leaf-frame-pointer is
+                                     /// enabled.
+  unsigned OptimizationLevel : 3; /// The -O[0-4] option specified.
+  unsigned OptimizeSize      : 1; /// If -Os is specified.
+  unsigned RelaxAll          : 1; /// Relax all machine code instructions.
+  unsigned SimplifyLibCalls  : 1; /// Set when -fbuiltin is enabled.
+  unsigned SoftFloat         : 1; /// -soft-float.
+  unsigned TimePasses        : 1; /// Set when -ftime-report is enabled.
+  unsigned UnitAtATime       : 1; /// Unused. For mirroring GCC optimization
+                                  /// selection.
+  unsigned UnrollLoops       : 1; /// Control whether loops are unrolled.
+  unsigned UnwindTables      : 1; /// Emit unwind tables.
+  unsigned VerifyModule      : 1; /// Control whether the module should be run
+                                  /// through the LLVM Verifier.
+  unsigned EmitDeclMetadata  : 1; /// Emit special metadata indicating what Decl*
+                                  /// various IR entities came from.  Only useful
+                                  /// when running CodeGen as a subroutine.
+
+  /// The code model to use (-mcmodel).
+  std::string CodeModel;
+
+  /// Enable additional debugging information.
+  std::string DebugPass;
+
+  /// The string to embed in the debug information for the compile unit, if
+  /// non-empty.
+  std::string DwarfDebugFlags;
+
+  /// The ABI to use for passing floating point arguments.
+  std::string FloatABI;
+
+  /// The float precision limit to use, if non-empty.
+  std::string LimitFloatPrecision;
+
+  /// The kind of inlining to perform.
+  InliningMethod Inlining;
+
+  /// The user provided name for the "main file", if non-empty. This is useful
+  /// in situations where the input file name does not match the original input
+  /// file, for example with -save-temps.
+  std::string MainFileName;
+
+  /// The name of the relocation model to use.
+  std::string RelocationModel;
+
+public:
+  CodeGenOptions() {
+    AsmVerbose = 0;
+    CXAAtExit = 1;
+    CXXCtorDtorAliases = 0;
+    DataSections = 0;
+    DebugInfo = 0;
+    DisableFPElim = 0;
+    DisableLLVMOpts = 0;
+    DisableRedZone = 0;
+    FunctionSections = 0;
+    MergeAllConstants = 1;
+    NoCommon = 0;
+    NoImplicitFloat = 0;
+    NoZeroInitializedInBSS = 0;
+    ObjCDispatchMethod = Legacy;
+    OmitLeafFramePointer = 0;
+    OptimizationLevel = 0;
+    OptimizeSize = 0;
+    RelaxAll = 0;
+    SimplifyLibCalls = 1;
+    SoftFloat = 0;
+    TimePasses = 0;
+    UnitAtATime = 1;
+    UnrollLoops = 0;
+    UnwindTables = 0;
+    VerifyModule = 1;
+    EmitDeclMetadata = 0;
+
+    Inlining = NoInlining;
+    RelocationModel = "pic";
+  }
+
+  ObjCDispatchMethodKind getObjCDispatchMethod() const {
+    return ObjCDispatchMethodKind(ObjCDispatchMethod);
+  }
+};
+
+}  // end namespace clang
+
+#endif