CodeGenOptions.h revision 7255a2d997b15beae82e627052fdb1b2474495c2 
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
19namespace clang {
20
21/// CodeGenOptions - Track various options which control how the code
22/// is optimized and passed to the backend.
23class CodeGenOptions {
24public:
25  enum InliningMethod {
26    NoInlining,         // Perform no inlining whatsoever.
27    NormalInlining,     // Use the standard function inlining pass.
28    OnlyAlwaysInlining  // Only run the always inlining pass.
29  };
30
31  enum ObjCDispatchMethodKind {
32    Legacy = 0,
33    NonLegacy = 1,
34    Mixed = 2
35  };
36
37  unsigned AsmVerbose        : 1; /// -dA, -fverbose-asm.
38  unsigned CXAAtExit         : 1; /// Use __cxa_atexit for calling destructors.
39  unsigned CXXCtorDtorAliases: 1; /// Emit complete ctors/dtors as linker
40                                  /// aliases to base ctors when possible.
41  unsigned DataSections      : 1; /// Set when -fdata-sections is enabled
42  unsigned DebugInfo         : 1; /// Should generate debug info (-g).
43  unsigned DisableFPElim     : 1; /// Set when -fomit-frame-pointer is enabled.
44  unsigned DisableLLVMOpts   : 1; /// Don't run any optimizations, for use in
45                                  /// getting .bc files that correspond to the
46                                  /// internal state before optimizations are
47                                  /// done.
48  unsigned DisableRedZone    : 1; /// Set when -mno-red-zone is enabled.
49  unsigned FunctionSections  : 1; /// Set when -ffunction-sections is enabled
50  unsigned InstrumentFunctions : 1; /// Set when -finstrument-functions is enabled
51  unsigned MergeAllConstants : 1; /// Merge identical constants.
52  unsigned NoCommon          : 1; /// Set when -fno-common or C++ is enabled.
53  unsigned NoImplicitFloat   : 1; /// Set when -mno-implicit-float is enabled.
54  unsigned NoZeroInitializedInBSS : 1; /// -fno-zero-initialized-in-bss
55  unsigned ObjCDispatchMethod : 2; /// Method of Objective-C dispatch to use.
56  unsigned OptimizationLevel : 3; /// The -O[0-4] option specified.
57  unsigned OptimizeSize      : 1; /// If -Os is specified.
58  unsigned RelaxAll          : 1; /// Relax all machine code instructions.
59  unsigned SimplifyLibCalls  : 1; /// Set when -fbuiltin is enabled.
60  unsigned SoftFloat         : 1; /// -soft-float.
61  unsigned TimePasses        : 1; /// Set when -ftime-report is enabled.
62  unsigned UnitAtATime       : 1; /// Unused. For mirroring GCC optimization
63                                  /// selection.
64  unsigned UnrollLoops       : 1; /// Control whether loops are unrolled.
65  unsigned UnwindTables      : 1; /// Emit unwind tables.
66  unsigned VerifyModule      : 1; /// Control whether the module should be run
67                                  /// through the LLVM Verifier.
68
69  /// The code model to use (-mcmodel).
70  std::string CodeModel;
71
72  /// Enable additional debugging information.
73  std::string DebugPass;
74
75  /// The string to embed in the debug information for the compile unit, if
76  /// non-empty.
77  std::string DwarfDebugFlags;
78
79  /// The ABI to use for passing floating point arguments.
80  std::string FloatABI;
81
82  /// The float precision limit to use, if non-empty.
83  std::string LimitFloatPrecision;
84
85  /// The kind of inlining to perform.
86  InliningMethod Inlining;
87
88  /// The user provided name for the "main file", if non-empty. This is useful
89  /// in situations where the input file name does not match the original input
90  /// file, for example with -save-temps.
91  std::string MainFileName;
92
93  /// The name of the relocation model to use.
94  std::string RelocationModel;
95
96public:
97  CodeGenOptions() {
98    AsmVerbose = 0;
99    CXAAtExit = 1;
100    CXXCtorDtorAliases = 0;
101    DataSections = 0;
102    DebugInfo = 0;
103    DisableFPElim = 0;
104    DisableLLVMOpts = 0;
105    DisableRedZone = 0;
106    FunctionSections = 0;
107    MergeAllConstants = 1;
108    NoCommon = 0;
109    NoImplicitFloat = 0;
110    NoZeroInitializedInBSS = 0;
111    ObjCDispatchMethod = Legacy;
112    OptimizationLevel = 0;
113    OptimizeSize = 0;
114    RelaxAll = 0;
115    SimplifyLibCalls = 1;
116    SoftFloat = 0;
117    TimePasses = 0;
118    UnitAtATime = 1;
119    UnrollLoops = 0;
120    UnwindTables = 0;
121    VerifyModule = 1;
122
123    Inlining = NoInlining;
124    RelocationModel = "pic";
125  }
126
127  ObjCDispatchMethodKind getObjCDispatchMethod() const {
128    return ObjCDispatchMethodKind(ObjCDispatchMethod);
129  }
130};
131
132}  // end namespace clang
133
134#endif
135