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 20 namespace clang { 21 22 /// CodeGenOptions - Track various options which control how the code 23 /// is optimized and passed to the backend. 24 class CodeGenOptions { 25 public: 26 enum InliningMethod { 27 NoInlining, // Perform no inlining whatsoever. 28 NormalInlining, // Use the standard function inlining pass. 29 OnlyAlwaysInlining // Only run the always inlining pass. 30 }; 31 32 enum ObjCDispatchMethodKind { 33 Legacy = 0, 34 NonLegacy = 1, 35 Mixed = 2 36 }; 37 38 unsigned AsmVerbose : 1; /// -dA, -fverbose-asm. 39 unsigned ObjCAutoRefCountExceptions : 1; /// Whether ARC should be EH-safe. 40 unsigned CUDAIsDevice : 1; /// Set when compiling for CUDA device. 41 unsigned CXAAtExit : 1; /// Use __cxa_atexit for calling destructors. 42 unsigned CXXCtorDtorAliases: 1; /// Emit complete ctors/dtors as linker 43 /// aliases to base ctors when possible. 44 unsigned DataSections : 1; /// Set when -fdata-sections is enabled 45 unsigned DebugInfo : 1; /// Should generate debug info (-g). 46 unsigned LimitDebugInfo : 1; /// Limit generated debug info to reduce size. 47 unsigned DisableFPElim : 1; /// Set when -fomit-frame-pointer is enabled. 48 unsigned DisableLLVMOpts : 1; /// Don't run any optimizations, for use in 49 /// getting .bc files that correspond to the 50 /// internal state before optimizations are 51 /// done. 52 unsigned DisableRedZone : 1; /// Set when -mno-red-zone is enabled. 53 unsigned DisableTailCalls : 1; /// Do not emit tail calls. 54 unsigned EmitDeclMetadata : 1; /// Emit special metadata indicating what 55 /// Decl* various IR entities came from. Only 56 /// useful when running CodeGen as a 57 /// subroutine. 58 unsigned EmitGcovArcs : 1; /// Emit coverage data files, aka. GCDA. 59 unsigned EmitGcovNotes : 1; /// Emit coverage "notes" files, aka GCNO. 60 unsigned ForbidGuardVariables : 1; /// Issue errors if C++ guard variables 61 /// are required 62 unsigned FunctionSections : 1; /// Set when -ffunction-sections is enabled 63 unsigned HiddenWeakTemplateVTables : 1; /// Emit weak vtables and RTTI for 64 /// template classes with hidden visibility 65 unsigned HiddenWeakVTables : 1; /// Emit weak vtables, RTTI, and thunks with 66 /// hidden visibility. 67 unsigned InstrumentFunctions : 1; /// Set when -finstrument-functions is 68 /// enabled. 69 unsigned InstrumentForProfiling : 1; /// Set when -pg is enabled 70 unsigned LessPreciseFPMAD : 1; /// Enable less precise MAD instructions to be 71 /// generated. 72 unsigned MergeAllConstants : 1; /// Merge identical constants. 73 unsigned NoCommon : 1; /// Set when -fno-common or C++ is enabled. 74 unsigned NoDwarf2CFIAsm : 1; /// Set when -fno-dwarf2-cfi-asm is enabled. 75 unsigned NoDwarfDirectoryAsm : 1; /// Set when -fno-dwarf-directory-asm is 76 /// enabled. 77 unsigned NoExecStack : 1; /// Set when -Wa,--noexecstack is enabled. 78 unsigned NoGlobalMerge : 1; /// Set when -mno-global-merge is enabled. 79 unsigned NoImplicitFloat : 1; /// Set when -mno-implicit-float is enabled. 80 unsigned NoInfsFPMath : 1; /// Assume FP arguments, results not +-Inf. 81 unsigned NoInline : 1; /// Set when -fno-inline is enabled. Disables 82 /// use of the inline keyword. 83 unsigned NoNaNsFPMath : 1; /// Assume FP arguments, results not NaN. 84 unsigned NoZeroInitializedInBSS : 1; /// -fno-zero-initialized-in-bss 85 unsigned ObjCDispatchMethod : 2; /// Method of Objective-C dispatch to use. 86 unsigned ObjCRuntimeHasARC : 1; /// The target runtime supports ARC natively 87 unsigned ObjCRuntimeHasTerminate : 1; /// The ObjC runtime has objc_terminate 88 unsigned OmitLeafFramePointer : 1; /// Set when -momit-leaf-frame-pointer is 89 /// enabled. 90 unsigned OptimizationLevel : 3; /// The -O[0-4] option specified. 91 unsigned OptimizeSize : 2; /// If -Os (==1) or -Oz (==2) is specified. 92 unsigned RelaxAll : 1; /// Relax all machine code instructions. 93 unsigned RelaxedAliasing : 1; /// Set when -fno-strict-aliasing is enabled. 94 unsigned SaveTempLabels : 1; /// Save temporary labels. 95 unsigned SimplifyLibCalls : 1; /// Set when -fbuiltin is enabled. 96 unsigned SoftFloat : 1; /// -soft-float. 97 unsigned StrictEnums : 1; /// Optimize based on strict enum definition. 98 unsigned TimePasses : 1; /// Set when -ftime-report is enabled. 99 unsigned UnitAtATime : 1; /// Unused. For mirroring GCC optimization 100 /// selection. 101 unsigned UnrollLoops : 1; /// Control whether loops are unrolled. 102 unsigned UnsafeFPMath : 1; /// Allow unsafe floating point optzns. 103 unsigned UnwindTables : 1; /// Emit unwind tables. 104 105 /// Attempt to use register sized accesses to bit-fields in structures, when 106 /// possible. 107 unsigned UseRegisterSizedBitfieldAccess : 1; 108 109 unsigned VerifyModule : 1; /// Control whether the module should be run 110 /// through the LLVM Verifier. 111 112 unsigned StackRealignment : 1; /// Control whether to permit stack 113 /// realignment. 114 unsigned StackAlignment; /// Overrides default stack alignment, 115 /// if not 0. 116 117 /// The code model to use (-mcmodel). 118 std::string CodeModel; 119 120 /// The filename with path we use for coverage files. The extension will be 121 /// replaced. 122 std::string CoverageFile; 123 124 /// Enable additional debugging information. 125 std::string DebugPass; 126 127 /// The string to embed in debug information as the current working directory. 128 std::string DebugCompilationDir; 129 130 /// The string to embed in the debug information for the compile unit, if 131 /// non-empty. 132 std::string DwarfDebugFlags; 133 134 /// The ABI to use for passing floating point arguments. 135 std::string FloatABI; 136 137 /// The float precision limit to use, if non-empty. 138 std::string LimitFloatPrecision; 139 140 /// The name of the bitcode file to link before optzns. 141 std::string LinkBitcodeFile; 142 143 /// The kind of inlining to perform. 144 InliningMethod Inlining; 145 146 /// The user provided name for the "main file", if non-empty. This is useful 147 /// in situations where the input file name does not match the original input 148 /// file, for example with -save-temps. 149 std::string MainFileName; 150 151 /// The name of the relocation model to use. 152 std::string RelocationModel; 153 154 /// If not an empty string, trap intrinsics are lowered to calls to this 155 /// function instead of to trap instructions. 156 std::string TrapFuncName; 157 158 /// A list of command-line options to forward to the LLVM backend. 159 std::vector<std::string> BackendOptions; 160 161 /// The user specified number of registers to be used for integral arguments, 162 /// or 0 if unspecified. 163 unsigned NumRegisterParameters; 164 165 public: 166 CodeGenOptions() { 167 AsmVerbose = 0; 168 CUDAIsDevice = 0; 169 CXAAtExit = 1; 170 CXXCtorDtorAliases = 0; 171 DataSections = 0; 172 DebugInfo = 0; 173 LimitDebugInfo = 0; 174 DisableFPElim = 0; 175 DisableLLVMOpts = 0; 176 DisableRedZone = 0; 177 DisableTailCalls = 0; 178 EmitDeclMetadata = 0; 179 EmitGcovArcs = 0; 180 EmitGcovNotes = 0; 181 ForbidGuardVariables = 0; 182 FunctionSections = 0; 183 HiddenWeakTemplateVTables = 0; 184 HiddenWeakVTables = 0; 185 InstrumentFunctions = 0; 186 InstrumentForProfiling = 0; 187 LessPreciseFPMAD = 0; 188 MergeAllConstants = 1; 189 NoCommon = 0; 190 NoDwarf2CFIAsm = 0; 191 NoImplicitFloat = 0; 192 NoInfsFPMath = 0; 193 NoInline = 0; 194 NoNaNsFPMath = 0; 195 NoZeroInitializedInBSS = 0; 196 NumRegisterParameters = 0; 197 ObjCAutoRefCountExceptions = 0; 198 ObjCDispatchMethod = Legacy; 199 ObjCRuntimeHasARC = 0; 200 ObjCRuntimeHasTerminate = 0; 201 OmitLeafFramePointer = 0; 202 OptimizationLevel = 0; 203 OptimizeSize = 0; 204 RelaxAll = 0; 205 RelaxedAliasing = 0; 206 SaveTempLabels = 0; 207 SimplifyLibCalls = 1; 208 SoftFloat = 0; 209 StrictEnums = 0; 210 TimePasses = 0; 211 UnitAtATime = 1; 212 UnrollLoops = 0; 213 UnsafeFPMath = 0; 214 UnwindTables = 0; 215 UseRegisterSizedBitfieldAccess = 0; 216 VerifyModule = 1; 217 StackRealignment = 0; 218 StackAlignment = 0; 219 220 Inlining = NoInlining; 221 RelocationModel = "pic"; 222 } 223 224 ObjCDispatchMethodKind getObjCDispatchMethod() const { 225 return ObjCDispatchMethodKind(ObjCDispatchMethod); 226 } 227 }; 228 229 } // end namespace clang 230 231 #endif 232
