1 //===-- MCTargetOptionsCommandFlags.cpp -----------------------*- C++ //-*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file contains machine code-specific flags that are shared between 10 // different command line tools. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/MC/MCTargetOptionsCommandFlags.h" 15 #include "llvm/MC/MCTargetOptions.h" 16 #include "llvm/Support/CommandLine.h" 17 18 using namespace llvm; 19 20 #define MCOPT(TY, NAME) \ 21 static cl::opt<TY> *NAME##View; \ 22 TY llvm::mc::get##NAME() { \ 23 assert(NAME##View && "RegisterMCTargetOptionsFlags not created."); \ 24 return *NAME##View; \ 25 } 26 27 #define MCOPT_EXP(TY, NAME) \ 28 MCOPT(TY, NAME) \ 29 std::optional<TY> llvm::mc::getExplicit##NAME() { \ 30 if (NAME##View->getNumOccurrences()) { \ 31 TY res = *NAME##View; \ 32 return res; \ 33 } \ 34 return std::nullopt; \ 35 } 36 37 MCOPT_EXP(bool, RelaxAll) 38 MCOPT(bool, IncrementalLinkerCompatible) 39 MCOPT(bool, FDPIC) 40 MCOPT(int, DwarfVersion) 41 MCOPT(bool, Dwarf64) 42 MCOPT(EmitDwarfUnwindType, EmitDwarfUnwind) 43 MCOPT(bool, EmitCompactUnwindNonCanonical) 44 MCOPT(bool, ShowMCInst) 45 MCOPT(bool, FatalWarnings) 46 MCOPT(bool, NoWarn) 47 MCOPT(bool, NoDeprecatedWarn) 48 MCOPT(bool, NoTypeCheck) 49 MCOPT(bool, SaveTempLabels) 50 MCOPT(bool, Crel) 51 MCOPT(bool, ImplicitMapSyms) 52 MCOPT(bool, X86RelaxRelocations) 53 MCOPT(bool, X86Sse2Avx) 54 MCOPT(std::string, ABIName) 55 MCOPT(std::string, AsSecureLogFile) 56 57 llvm::mc::RegisterMCTargetOptionsFlags::RegisterMCTargetOptionsFlags() { 58 #define MCBINDOPT(NAME) \ 59 do { \ 60 NAME##View = std::addressof(NAME); \ 61 } while (0) 62 63 static cl::opt<bool> RelaxAll( 64 "mc-relax-all", cl::desc("When used with filetype=obj, relax all fixups " 65 "in the emitted object file")); 66 MCBINDOPT(RelaxAll); 67 68 static cl::opt<bool> IncrementalLinkerCompatible( 69 "incremental-linker-compatible", 70 cl::desc( 71 "When used with filetype=obj, " 72 "emit an object file which can be used with an incremental linker")); 73 MCBINDOPT(IncrementalLinkerCompatible); 74 75 static cl::opt<bool> FDPIC("fdpic", cl::desc("Use the FDPIC ABI")); 76 MCBINDOPT(FDPIC); 77 78 static cl::opt<int> DwarfVersion("dwarf-version", cl::desc("Dwarf version"), 79 cl::init(0)); 80 MCBINDOPT(DwarfVersion); 81 82 static cl::opt<bool> Dwarf64( 83 "dwarf64", 84 cl::desc("Generate debugging info in the 64-bit DWARF format")); 85 MCBINDOPT(Dwarf64); 86 87 static cl::opt<EmitDwarfUnwindType> EmitDwarfUnwind( 88 "emit-dwarf-unwind", cl::desc("Whether to emit DWARF EH frame entries."), 89 cl::init(EmitDwarfUnwindType::Default), 90 cl::values(clEnumValN(EmitDwarfUnwindType::Always, "always", 91 "Always emit EH frame entries"), 92 clEnumValN(EmitDwarfUnwindType::NoCompactUnwind, 93 "no-compact-unwind", 94 "Only emit EH frame entries when compact unwind is " 95 "not available"), 96 clEnumValN(EmitDwarfUnwindType::Default, "default", 97 "Use target platform default"))); 98 MCBINDOPT(EmitDwarfUnwind); 99 100 static cl::opt<bool> EmitCompactUnwindNonCanonical( 101 "emit-compact-unwind-non-canonical", 102 cl::desc( 103 "Whether to try to emit Compact Unwind for non canonical entries."), 104 cl::init( 105 false)); // By default, use DWARF for non-canonical personalities. 106 MCBINDOPT(EmitCompactUnwindNonCanonical); 107 108 static cl::opt<bool> ShowMCInst( 109 "asm-show-inst", 110 cl::desc("Emit internal instruction representation to assembly file")); 111 MCBINDOPT(ShowMCInst); 112 113 static cl::opt<bool> FatalWarnings("fatal-warnings", 114 cl::desc("Treat warnings as errors")); 115 MCBINDOPT(FatalWarnings); 116 117 static cl::opt<bool> NoWarn("no-warn", cl::desc("Suppress all warnings")); 118 static cl::alias NoWarnW("W", cl::desc("Alias for --no-warn"), 119 cl::aliasopt(NoWarn)); 120 MCBINDOPT(NoWarn); 121 122 static cl::opt<bool> NoDeprecatedWarn( 123 "no-deprecated-warn", cl::desc("Suppress all deprecated warnings")); 124 MCBINDOPT(NoDeprecatedWarn); 125 126 static cl::opt<bool> NoTypeCheck( 127 "no-type-check", cl::desc("Suppress type errors (Wasm)")); 128 MCBINDOPT(NoTypeCheck); 129 130 static cl::opt<bool> SaveTempLabels( 131 "save-temp-labels", cl::desc("Don't discard temporary labels")); 132 MCBINDOPT(SaveTempLabels); 133 134 static cl::opt<bool> Crel("crel", 135 cl::desc("Use CREL relocation format for ELF")); 136 MCBINDOPT(Crel); 137 138 static cl::opt<bool> ImplicitMapSyms( 139 "implicit-mapsyms", 140 cl::desc("Allow mapping symbol at section beginning to be implicit, " 141 "lowering number of mapping symbols at the expense of some " 142 "portability. Recommended for projects that can build all their " 143 "object files using this option")); 144 MCBINDOPT(ImplicitMapSyms); 145 146 static cl::opt<bool> X86RelaxRelocations( 147 "x86-relax-relocations", 148 cl::desc("Emit GOTPCRELX/REX_GOTPCRELX/CODE_4_GOTPCRELX instead of " 149 "GOTPCREL on x86-64 ELF"), 150 cl::init(true)); 151 MCBINDOPT(X86RelaxRelocations); 152 153 static cl::opt<bool> X86Sse2Avx( 154 "x86-sse2avx", cl::desc("Specify that the assembler should encode SSE " 155 "instructions with VEX prefix")); 156 MCBINDOPT(X86Sse2Avx); 157 158 static cl::opt<std::string> ABIName( 159 "target-abi", 160 cl::desc("The name of the ABI to be targeted from the backend."), 161 cl::init("")); 162 MCBINDOPT(ABIName); 163 164 static cl::opt<std::string> AsSecureLogFile( 165 "as-secure-log-file", cl::desc("As secure log file name"), cl::Hidden); 166 MCBINDOPT(AsSecureLogFile); 167 168 #undef MCBINDOPT 169 } 170 171 MCTargetOptions llvm::mc::InitMCTargetOptionsFromFlags() { 172 MCTargetOptions Options; 173 Options.MCRelaxAll = getRelaxAll(); 174 Options.MCIncrementalLinkerCompatible = getIncrementalLinkerCompatible(); 175 Options.FDPIC = getFDPIC(); 176 Options.Dwarf64 = getDwarf64(); 177 Options.DwarfVersion = getDwarfVersion(); 178 Options.ShowMCInst = getShowMCInst(); 179 Options.ABIName = getABIName(); 180 Options.MCFatalWarnings = getFatalWarnings(); 181 Options.MCNoWarn = getNoWarn(); 182 Options.MCNoDeprecatedWarn = getNoDeprecatedWarn(); 183 Options.MCNoTypeCheck = getNoTypeCheck(); 184 Options.MCSaveTempLabels = getSaveTempLabels(); 185 Options.Crel = getCrel(); 186 Options.ImplicitMapSyms = getImplicitMapSyms(); 187 Options.X86RelaxRelocations = getX86RelaxRelocations(); 188 Options.X86Sse2Avx = getX86Sse2Avx(); 189 Options.EmitDwarfUnwind = getEmitDwarfUnwind(); 190 Options.EmitCompactUnwindNonCanonical = getEmitCompactUnwindNonCanonical(); 191 Options.AsSecureLogFile = getAsSecureLogFile(); 192 193 return Options; 194 } 195