CodeGenOptions.h revision 269011 
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
55    DebugLineTablesOnly,  /// Emit only debug info necessary for generating
56                          /// line number tables (-gline-tables-only).
57
58    LimitedDebugInfo,     /// Limit generated debug info to reduce size
59                          /// (-fno-standalone-debug). This emits
60                          /// forward decls for types that could be
61                          /// replaced with forward decls in the source
62                          /// code. For dynamic C++ classes type info
63                          /// is only emitted int the module that
64                          /// contains the classe's vtable.
65
66    FullDebugInfo         /// Generate complete debug info.
67  };
68
69  enum TLSModel {
70    GeneralDynamicTLSModel,
71    LocalDynamicTLSModel,
72    InitialExecTLSModel,
73    LocalExecTLSModel
74  };
75
76  enum FPContractModeKind {
77    FPC_Off,        // Form fused FP ops only where result will not be affected.
78    FPC_On,         // Form fused FP ops according to FP_CONTRACT rules.
79    FPC_Fast        // Aggressively fuse FP ops (E.g. FMA).
80  };
81
82  enum StructReturnConventionKind {
83    SRCK_Default,  // No special option was passed.
84    SRCK_OnStack,  // Small structs on the stack (-fpcc-struct-return).
85    SRCK_InRegs    // Small structs in registers (-freg-struct-return).
86  };
87
88  /// The code model to use (-mcmodel).
89  std::string CodeModel;
90
91  /// The filename with path we use for coverage files. The extension will be
92  /// replaced.
93  std::string CoverageFile;
94
95  /// The version string to put into coverage files.
96  char CoverageVersion[4];
97
98  /// Enable additional debugging information.
99  std::string DebugPass;
100
101  /// The string to embed in debug information as the current working directory.
102  std::string DebugCompilationDir;
103
104  /// The string to embed in the debug information for the compile unit, if
105  /// non-empty.
106  std::string DwarfDebugFlags;
107
108  /// The ABI to use for passing floating point arguments.
109  std::string FloatABI;
110
111  /// The float precision limit to use, if non-empty.
112  std::string LimitFloatPrecision;
113
114  /// The name of the bitcode file to link before optzns.
115  std::string LinkBitcodeFile;
116
117  /// The user provided name for the "main file", if non-empty. This is useful
118  /// in situations where the input file name does not match the original input
119  /// file, for example with -save-temps.
120  std::string MainFileName;
121
122  /// The name for the split debug info file that we'll break out. This is used
123  /// in the backend for setting the name in the skeleton cu.
124  std::string SplitDwarfFile;
125
126  /// The name of the relocation model to use.
127  std::string RelocationModel;
128
129  /// Path to blacklist file for sanitizers.
130  std::string SanitizerBlacklistFile;
131
132  /// If not an empty string, trap intrinsics are lowered to calls to this
133  /// function instead of to trap instructions.
134  std::string TrapFuncName;
135
136  /// A list of command-line options to forward to the LLVM backend.
137  std::vector<std::string> BackendOptions;
138
139  /// A list of dependent libraries.
140  std::vector<std::string> DependentLibraries;
141
142  /// Name of the profile file to use with -fprofile-sample-use.
143  std::string SampleProfileFile;
144
145public:
146  // Define accessors/mutators for code generation options of enumeration type.
147#define CODEGENOPT(Name, Bits, Default)
148#define ENUM_CODEGENOPT(Name, Type, Bits, Default) \
149  Type get##Name() const { return static_cast<Type>(Name); } \
150  void set##Name(Type Value) { Name = static_cast<unsigned>(Value); }
151#include "clang/Frontend/CodeGenOptions.def"
152
153  CodeGenOptions() {
154#define CODEGENOPT(Name, Bits, Default) Name = Default;
155#define ENUM_CODEGENOPT(Name, Type, Bits, Default) \
156  set##Name(Default);
157#include "clang/Frontend/CodeGenOptions.def"
158
159    RelocationModel = "pic";
160    memcpy(CoverageVersion, "402*", 4);
161  }
162};
163
164}  // end namespace clang
165
166#endif
167