CodeGenOptions.h revision 91ecfa6af51836d3ccc90beddab1193b0c060739 
1//===--- CodeGenOptions.h ---------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10//  This file defines the CodeGenOptions interface.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CLANG_FRONTEND_CODEGENOPTIONS_H
15#define LLVM_CLANG_FRONTEND_CODEGENOPTIONS_H
16
17#include <string>
18#include <vector>
19
20namespace clang {
21
22/// \brief Bitfields of CodeGenOptions, split out from CodeGenOptions to ensure
23/// that this large collection of bitfields is a trivial class type.
24class CodeGenOptionsBase {
25public:
26#define CODEGENOPT(Name, Bits, Default) unsigned Name : Bits;
27#define ENUM_CODEGENOPT(Name, Type, Bits, Default)
28#include "clang/Frontend/CodeGenOptions.def"
29
30protected:
31#define CODEGENOPT(Name, Bits, Default)
32#define ENUM_CODEGENOPT(Name, Type, Bits, Default) unsigned Name : Bits;
33#include "clang/Frontend/CodeGenOptions.def"
34};
35
36/// CodeGenOptions - Track various options which control how the code
37/// is optimized and passed to the backend.
38class CodeGenOptions : public CodeGenOptionsBase {
39public:
40  enum InliningMethod {
41    NoInlining,         // Perform no inlining whatsoever.
42    NormalInlining,     // Use the standard function inlining pass.
43    OnlyAlwaysInlining  // Only run the always inlining pass.
44  };
45
46  enum ObjCDispatchMethodKind {
47    Legacy = 0,
48    NonLegacy = 1,
49    Mixed = 2
50  };
51
52  enum DebugInfoKind {
53    NoDebugInfo,          // Don't generate debug info.
54    DebugLineTablesOnly,  // Emit only debug info necessary for generating
55                          // line number tables (-gline-tables-only).
56    LimitedDebugInfo,     // Limit generated debug info to reduce size
57                          // (-flimit-debug-info).
58    FullDebugInfo         // Generate complete debug info.
59  };
60
61  enum TLSModel {
62    GeneralDynamicTLSModel,
63    LocalDynamicTLSModel,
64    InitialExecTLSModel,
65    LocalExecTLSModel
66  };
67
68  enum FPContractModeKind {
69    FPC_Off,        // Form fused FP ops only where result will not be affected.
70    FPC_On,         // Form fused FP ops according to FP_CONTRACT rules.
71    FPC_Fast        // Aggressively fuse FP ops (E.g. FMA).
72  };
73
74  /// The code model to use (-mcmodel).
75  std::string CodeModel;
76
77  /// The filename with path we use for coverage files. The extension will be
78  /// replaced.
79  std::string CoverageFile;
80
81  /// Enable additional debugging information.
82  std::string DebugPass;
83
84  /// The string to embed in debug information as the current working directory.
85  std::string DebugCompilationDir;
86
87  /// The string to embed in the debug information for the compile unit, if
88  /// non-empty.
89  std::string DwarfDebugFlags;
90
91  /// The ABI to use for passing floating point arguments.
92  std::string FloatABI;
93
94  /// The float precision limit to use, if non-empty.
95  std::string LimitFloatPrecision;
96
97  /// The name of the bitcode file to link before optzns.
98  std::string LinkBitcodeFile;
99
100  /// The user provided name for the "main file", if non-empty. This is useful
101  /// in situations where the input file name does not match the original input
102  /// file, for example with -save-temps.
103  std::string MainFileName;
104
105  /// The name of the relocation model to use.
106  std::string RelocationModel;
107
108  /// Path to blacklist file for sanitizers.
109  std::string SanitizerBlacklistFile;
110
111  /// If not an empty string, trap intrinsics are lowered to calls to this
112  /// function instead of to trap instructions.
113  std::string TrapFuncName;
114
115  /// A list of command-line options to forward to the LLVM backend.
116  std::vector<std::string> BackendOptions;
117
118public:
119  // Define accessors/mutators for code generation options of enumeration type.
120#define CODEGENOPT(Name, Bits, Default)
121#define ENUM_CODEGENOPT(Name, Type, Bits, Default) \
122  Type get##Name() const { return static_cast<Type>(Name); } \
123  void set##Name(Type Value) { Name = static_cast<unsigned>(Value); }
124#include "clang/Frontend/CodeGenOptions.def"
125
126  CodeGenOptions() {
127#define CODEGENOPT(Name, Bits, Default) Name = Default;
128#define ENUM_CODEGENOPT(Name, Type, Bits, Default) \
129  set##Name(Default);
130#include "clang/Frontend/CodeGenOptions.def"
131
132    RelocationModel = "pic";
133  }
134};
135
136}  // end namespace clang
137
138#endif
139