llvm/lib/MC/MCTargetOptionsCommandFlags.cpp

   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", cl::Hidden,
 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 }