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 CXAAtExit : 1; /// Use __cxa_atexit for calling destructors. 41 unsigned CXXCtorDtorAliases: 1; /// Emit complete ctors/dtors as linker 42 /// aliases to base ctors when possible. 43 unsigned DataSections : 1; /// Set when -fdata-sections is enabled 44 unsigned DebugInfo : 1; /// Should generate debug info (-g). 45 unsigned LimitDebugInfo : 1; /// Limit generated debug info to reduce size. 46 unsigned DisableFPElim : 1; /// Set when -fomit-frame-pointer is enabled. 47 unsigned DisableLLVMOpts : 1; /// Don't run any optimizations, for use in 48 /// getting .bc files that correspond to the 49 /// internal state before optimizations are 50 /// done. 51 unsigned DisableRedZone : 1; /// Set when -mno-red-zone is enabled. 52 unsigned EmitDeclMetadata : 1; /// Emit special metadata indicating what 53 /// Decl* various IR entities came from. Only 54 /// useful when running CodeGen as a 55 /// subroutine. 56 unsigned EmitGcovArcs : 1; /// Emit coverage data files, aka. GCDA. 57 unsigned EmitGcovNotes : 1; /// Emit coverage "notes" files, aka GCNO. 58 unsigned ForbidGuardVariables : 1; /// Issue errors if C++ guard variables 59 /// are required 60 unsigned FunctionSections : 1; /// Set when -ffunction-sections is enabled 61 unsigned HiddenWeakTemplateVTables : 1; /// Emit weak vtables and RTTI for 62 /// template classes with hidden visibility 63 unsigned HiddenWeakVTables : 1; /// Emit weak vtables, RTTI, and thunks with 64 /// hidden visibility. 65 unsigned InstrumentFunctions : 1; /// Set when -finstrument-functions is 66 /// enabled. 67 unsigned InstrumentForProfiling : 1; /// Set when -pg is enabled 68 unsigned LessPreciseFPMAD : 1; /// Enable less precise MAD instructions to be 69 /// generated. 70 unsigned MergeAllConstants : 1; /// Merge identical constants. 71 unsigned NoCommon : 1; /// Set when -fno-common or C++ is enabled. 72 unsigned NoDwarf2CFIAsm : 1; /// Set when -fno-dwarf2-cfi-asm is enabled. 73 unsigned NoExecStack : 1; /// Set when -Wa,--noexecstack is enabled. 74 unsigned NoImplicitFloat : 1; /// Set when -mno-implicit-float is enabled. 75 unsigned NoInfsFPMath : 1; /// Assume FP arguments, results not +-Inf. 76 unsigned NoNaNsFPMath : 1; /// Assume FP arguments, results not NaN. 77 unsigned NoZeroInitializedInBSS : 1; /// -fno-zero-initialized-in-bss 78 unsigned ObjCDispatchMethod : 2; /// Method of Objective-C dispatch to use. 79 unsigned ObjCRuntimeHasARC : 1; /// The target runtime supports ARC natively 80 unsigned ObjCRuntimeHasTerminate : 1; /// The ObjC runtime has objc_terminate 81 unsigned OmitLeafFramePointer : 1; /// Set when -momit-leaf-frame-pointer is 82 /// enabled. 83 unsigned OptimizationLevel : 3; /// The -O[0-4] option specified. 84 unsigned OptimizeSize : 2; /// If -Os (==1) or -Oz (==2) is specified. 85 unsigned RelaxAll : 1; /// Relax all machine code instructions. 86 unsigned RelaxedAliasing : 1; /// Set when -fno-strict-aliasing is enabled. 87 unsigned SaveTempLabels : 1; /// Save temporary labels. 88 unsigned SimplifyLibCalls : 1; /// Set when -fbuiltin is enabled. 89 unsigned SoftFloat : 1; /// -soft-float. 90 unsigned TimePasses : 1; /// Set when -ftime-report is enabled. 91 unsigned UnitAtATime : 1; /// Unused. For mirroring GCC optimization 92 /// selection. 93 unsigned UnrollLoops : 1; /// Control whether loops are unrolled. 94 unsigned UnsafeFPMath : 1; /// Allow unsafe floating point optzns. 95 unsigned UnwindTables : 1; /// Emit unwind tables. 96 97 /// Attempt to use register sized accesses to bit-fields in structures, when 98 /// possible. 99 unsigned UseRegisterSizedBitfieldAccess : 1; 100 101 unsigned VerifyModule : 1; /// Control whether the module should be run 102 /// through the LLVM Verifier. 103 104 /// The code model to use (-mcmodel). 105 std::string CodeModel; 106 107 /// The filename with path we use for coverage files. The extension will be 108 /// replaced. 109 std::string CoverageFile; 110 111 /// Enable additional debugging information. 112 std::string DebugPass; 113 114 /// The string to embed in the debug information for the compile unit, if 115 /// non-empty. 116 std::string DwarfDebugFlags; 117 118 /// The ABI to use for passing floating point arguments. 119 std::string FloatABI; 120 121 /// The float precision limit to use, if non-empty. 122 std::string LimitFloatPrecision; 123 124 /// The kind of inlining to perform. 125 InliningMethod Inlining; 126 127 /// The user provided name for the "main file", if non-empty. This is useful 128 /// in situations where the input file name does not match the original input 129 /// file, for example with -save-temps. 130 std::string MainFileName; 131 132 /// The name of the relocation model to use. 133 std::string RelocationModel; 134 135 /// A list of command-line options to forward to the LLVM backend. 136 std::vector<std::string> BackendOptions; 137 138 /// The user specified number of registers to be used for integral arguments, 139 /// or 0 if unspecified. 140 unsigned NumRegisterParameters; 141 142 public: 143 CodeGenOptions() { 144 AsmVerbose = 0; 145 CXAAtExit = 1; 146 CXXCtorDtorAliases = 0; 147 DataSections = 0; 148 DebugInfo = 0; 149 LimitDebugInfo = 0; 150 DisableFPElim = 0; 151 DisableLLVMOpts = 0; 152 DisableRedZone = 0; 153 EmitDeclMetadata = 0; 154 EmitGcovArcs = 0; 155 EmitGcovNotes = 0; 156 ForbidGuardVariables = 0; 157 FunctionSections = 0; 158 HiddenWeakTemplateVTables = 0; 159 HiddenWeakVTables = 0; 160 InstrumentFunctions = 0; 161 InstrumentForProfiling = 0; 162 LessPreciseFPMAD = 0; 163 MergeAllConstants = 1; 164 NoCommon = 0; 165 NoDwarf2CFIAsm = 0; 166 NoImplicitFloat = 0; 167 NoInfsFPMath = 0; 168 NoNaNsFPMath = 0; 169 NoZeroInitializedInBSS = 0; 170 NumRegisterParameters = 0; 171 ObjCAutoRefCountExceptions = 0; 172 ObjCDispatchMethod = Legacy; 173 ObjCRuntimeHasARC = 0; 174 ObjCRuntimeHasTerminate = 0; 175 OmitLeafFramePointer = 0; 176 OptimizationLevel = 0; 177 OptimizeSize = 0; 178 RelaxAll = 0; 179 RelaxedAliasing = 0; 180 SaveTempLabels = 0; 181 SimplifyLibCalls = 1; 182 SoftFloat = 0; 183 TimePasses = 0; 184 UnitAtATime = 1; 185 UnrollLoops = 0; 186 UnsafeFPMath = 0; 187 UnwindTables = 0; 188 UseRegisterSizedBitfieldAccess = 0; 189 VerifyModule = 1; 190 191 Inlining = NoInlining; 192 RelocationModel = "pic"; 193 } 194 195 ObjCDispatchMethodKind getObjCDispatchMethod() const { 196 return ObjCDispatchMethodKind(ObjCDispatchMethod); 197 } 198 }; 199 200 } // end namespace clang 201 202 #endif 203
