1 //===--- CodeGenOptions.h ---------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the CodeGenOptions interface.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_FRONTEND_CODEGENOPTIONS_H
15 #define LLVM_CLANG_FRONTEND_CODEGENOPTIONS_H
22 /// CodeGenOptions - Track various options which control how the code
23 /// is optimized and passed to the backend.
24 class CodeGenOptions {
27 NoInlining, // Perform no inlining whatsoever.
28 NormalInlining, // Use the standard function inlining pass.
29 OnlyAlwaysInlining // Only run the always inlining pass.
32 enum ObjCDispatchMethodKind {
38 unsigned AsmVerbose : 1; /// -dA, -fverbose-asm.
39 unsigned CXAAtExit : 1; /// Use __cxa_atexit for calling destructors.
40 unsigned CXXCtorDtorAliases: 1; /// Emit complete ctors/dtors as linker
41 /// aliases to base ctors when possible.
42 unsigned DataSections : 1; /// Set when -fdata-sections is enabled
43 unsigned DebugInfo : 1; /// Should generate debug info (-g).
44 unsigned LimitDebugInfo : 1; /// Limit generated debug info to reduce size.
45 unsigned DisableFPElim : 1; /// Set when -fomit-frame-pointer is enabled.
46 unsigned DisableLLVMOpts : 1; /// Don't run any optimizations, for use in
47 /// getting .bc files that correspond to the
48 /// internal state before optimizations are
50 unsigned DisableRedZone : 1; /// Set when -mno-red-zone is enabled.
51 unsigned EmitDeclMetadata : 1; /// Emit special metadata indicating what
52 /// Decl* various IR entities came from. Only
53 /// useful when running CodeGen as a
55 unsigned EmitGcovArcs : 1; /// Emit coverage data files, aka. GCDA.
56 unsigned EmitGcovNotes : 1; /// Emit coverage "notes" files, aka GCNO.
57 unsigned ForbidGuardVariables : 1; /// Issue errors if C++ guard variables
59 unsigned FunctionSections : 1; /// Set when -ffunction-sections is enabled
60 unsigned HiddenWeakTemplateVTables : 1; /// Emit weak vtables and RTTI for
61 /// template classes with hidden visibility
62 unsigned HiddenWeakVTables : 1; /// Emit weak vtables, RTTI, and thunks with
63 /// hidden visibility.
64 unsigned InstrumentFunctions : 1; /// Set when -finstrument-functions is
66 unsigned InstrumentForProfiling : 1; /// Set when -pg is enabled
67 unsigned LessPreciseFPMAD : 1; /// Enable less precise MAD instructions to be
69 unsigned MergeAllConstants : 1; /// Merge identical constants.
70 unsigned NoCommon : 1; /// Set when -fno-common or C++ is enabled.
71 unsigned NoDwarf2CFIAsm : 1; /// Set when -fno-dwarf2-cfi-asm is enabled.
72 unsigned NoImplicitFloat : 1; /// Set when -mno-implicit-float is enabled.
73 unsigned NoInfsFPMath : 1; /// Assume FP arguments, results not +-Inf.
74 unsigned NoNaNsFPMath : 1; /// Assume FP arguments, results not NaN.
75 unsigned NoZeroInitializedInBSS : 1; /// -fno-zero-initialized-in-bss
76 unsigned ObjCDispatchMethod : 2; /// Method of Objective-C dispatch to use.
77 unsigned OmitLeafFramePointer : 1; /// Set when -momit-leaf-frame-pointer is
79 unsigned OptimizationLevel : 3; /// The -O[0-4] option specified.
80 unsigned OptimizeSize : 2; /// If -Os (==1) or -Oz (==2) is specified.
81 unsigned RelaxAll : 1; /// Relax all machine code instructions.
82 unsigned RelaxedAliasing : 1; /// Set when -fno-strict-aliasing is enabled.
83 unsigned SaveTempLabels : 1; /// Save temporary labels.
84 unsigned SimplifyLibCalls : 1; /// Set when -fbuiltin is enabled.
85 unsigned SoftFloat : 1; /// -soft-float.
86 unsigned TimePasses : 1; /// Set when -ftime-report is enabled.
87 unsigned UnitAtATime : 1; /// Unused. For mirroring GCC optimization
89 unsigned UnrollLoops : 1; /// Control whether loops are unrolled.
90 unsigned UnsafeFPMath : 1; /// Allow unsafe floating point optzns.
91 unsigned UnwindTables : 1; /// Emit unwind tables.
92 unsigned VerifyModule : 1; /// Control whether the module should be run
93 /// through the LLVM Verifier.
95 /// The code model to use (-mcmodel).
96 std::string CodeModel;
98 /// The filename with path we use for coverage files. The extension will be
100 std::string CoverageFile;
102 /// Enable additional debugging information.
103 std::string DebugPass;
105 /// The string to embed in the debug information for the compile unit, if
107 std::string DwarfDebugFlags;
109 /// The ABI to use for passing floating point arguments.
110 std::string FloatABI;
112 /// The float precision limit to use, if non-empty.
113 std::string LimitFloatPrecision;
115 /// The kind of inlining to perform.
116 InliningMethod Inlining;
118 /// The user provided name for the "main file", if non-empty. This is useful
119 /// in situations where the input file name does not match the original input
120 /// file, for example with -save-temps.
121 std::string MainFileName;
123 /// The name of the relocation model to use.
124 std::string RelocationModel;
126 /// A list of command-line options to forward to the LLVM backend.
127 std::vector<std::string> BackendOptions;
129 /// The user specified number of registers to be used for integral arguments,
130 /// or 0 if unspecified.
131 unsigned NumRegisterParameters;
137 CXXCtorDtorAliases = 0;
144 EmitDeclMetadata = 0;
147 ForbidGuardVariables = 0;
148 FunctionSections = 0;
149 HiddenWeakTemplateVTables = 0;
150 HiddenWeakVTables = 0;
151 InstrumentFunctions = 0;
152 InstrumentForProfiling = 0;
153 LessPreciseFPMAD = 0;
154 MergeAllConstants = 1;
160 NoZeroInitializedInBSS = 0;
161 NumRegisterParameters = 0;
162 ObjCDispatchMethod = Legacy;
163 OmitLeafFramePointer = 0;
164 OptimizationLevel = 0;
169 SimplifyLibCalls = 1;
178 Inlining = NoInlining;
179 RelocationModel = "pic";
182 ObjCDispatchMethodKind getObjCDispatchMethod() const {
183 return ObjCDispatchMethodKind(ObjCDispatchMethod);
187 } // end namespace clang