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(int, DwarfVersion)
  40 MCOPT(bool, Dwarf64)
  41 MCOPT(EmitDwarfUnwindType, EmitDwarfUnwind)
  42 MCOPT(bool, EmitCompactUnwindNonCanonical)
  43 MCOPT(bool, ShowMCInst)
  44 MCOPT(bool, FatalWarnings)
  45 MCOPT(bool, NoWarn)
  46 MCOPT(bool, NoDeprecatedWarn)
  47 MCOPT(bool, NoTypeCheck)
  48 MCOPT(std::string, ABIName)
  49 MCOPT(std::string, AsSecureLogFile)
  50
  51 llvm::mc::RegisterMCTargetOptionsFlags::RegisterMCTargetOptionsFlags() {
  52 #define MCBINDOPT(NAME)                                                        \
  53   do {                                                                         \
  54     NAME##View = std::addressof(NAME);                                         \
  55   } while (0)
  56
  57   static cl::opt<bool> RelaxAll(
  58       "mc-relax-all", cl::desc("When used with filetype=obj, relax all fixups "
  59                                "in the emitted object file"));
  60   MCBINDOPT(RelaxAll);
  61
  62   static cl::opt<bool> IncrementalLinkerCompatible(
  63       "incremental-linker-compatible",
  64       cl::desc(
  65           "When used with filetype=obj, "
  66           "emit an object file which can be used with an incremental linker"));
  67   MCBINDOPT(IncrementalLinkerCompatible);
  68
  69   static cl::opt<int> DwarfVersion("dwarf-version", cl::desc("Dwarf version"),
  70                                    cl::init(0));
  71   MCBINDOPT(DwarfVersion);
  72
  73   static cl::opt<bool> Dwarf64(
  74       "dwarf64",
  75       cl::desc("Generate debugging info in the 64-bit DWARF format"));
  76   MCBINDOPT(Dwarf64);
  77
  78   static cl::opt<EmitDwarfUnwindType> EmitDwarfUnwind(
  79       "emit-dwarf-unwind", cl::desc("Whether to emit DWARF EH frame entries."),
  80       cl::init(EmitDwarfUnwindType::Default),
  81       cl::values(clEnumValN(EmitDwarfUnwindType::Always, "always",
  82                             "Always emit EH frame entries"),
  83                  clEnumValN(EmitDwarfUnwindType::NoCompactUnwind,
  84                             "no-compact-unwind",
  85                             "Only emit EH frame entries when compact unwind is "
  86                             "not available"),
  87                  clEnumValN(EmitDwarfUnwindType::Default, "default",
  88                             "Use target platform default")));
  89   MCBINDOPT(EmitDwarfUnwind);
  90
  91   static cl::opt<bool> EmitCompactUnwindNonCanonical(
  92       "emit-compact-unwind-non-canonical",
  93       cl::desc(
  94           "Whether to try to emit Compact Unwind for non canonical entries."),
  95       cl::init(
  96           false)); // By default, use DWARF for non-canonical personalities.
  97   MCBINDOPT(EmitCompactUnwindNonCanonical);
  98
  99   static cl::opt<bool> ShowMCInst(
 100       "asm-show-inst",
 101       cl::desc("Emit internal instruction representation to assembly file"));
 102   MCBINDOPT(ShowMCInst);
 103
 104   static cl::opt<bool> FatalWarnings("fatal-warnings",
 105                                      cl::desc("Treat warnings as errors"));
 106   MCBINDOPT(FatalWarnings);
 107
 108   static cl::opt<bool> NoWarn("no-warn", cl::desc("Suppress all warnings"));
 109   static cl::alias NoWarnW("W", cl::desc("Alias for --no-warn"),
 110                            cl::aliasopt(NoWarn));
 111   MCBINDOPT(NoWarn);
 112
 113   static cl::opt<bool> NoDeprecatedWarn(
 114       "no-deprecated-warn", cl::desc("Suppress all deprecated warnings"));
 115   MCBINDOPT(NoDeprecatedWarn);
 116
 117   static cl::opt<bool> NoTypeCheck(
 118       "no-type-check", cl::desc("Suppress type errors (Wasm)"));
 119   MCBINDOPT(NoTypeCheck);
 120
 121   static cl::opt<std::string> ABIName(
 122       "target-abi", cl::Hidden,
 123       cl::desc("The name of the ABI to be targeted from the backend."),
 124       cl::init(""));
 125   MCBINDOPT(ABIName);
 126
 127   static cl::opt<std::string> AsSecureLogFile(
 128       "as-secure-log-file", cl::desc("As secure log file name"), cl::Hidden);
 129   MCBINDOPT(AsSecureLogFile);
 130
 131 #undef MCBINDOPT
 132 }
 133
 134 MCTargetOptions llvm::mc::InitMCTargetOptionsFromFlags() {
 135   MCTargetOptions Options;
 136   Options.MCRelaxAll = getRelaxAll();
 137   Options.MCIncrementalLinkerCompatible = getIncrementalLinkerCompatible();
 138   Options.Dwarf64 = getDwarf64();
 139   Options.DwarfVersion = getDwarfVersion();
 140   Options.ShowMCInst = getShowMCInst();
 141   Options.ABIName = getABIName();
 142   Options.MCFatalWarnings = getFatalWarnings();
 143   Options.MCNoWarn = getNoWarn();
 144   Options.MCNoDeprecatedWarn = getNoDeprecatedWarn();
 145   Options.MCNoTypeCheck = getNoTypeCheck();
 146   Options.EmitDwarfUnwind = getEmitDwarfUnwind();
 147   Options.EmitCompactUnwindNonCanonical = getEmitCompactUnwindNonCanonical();
 148   Options.AsSecureLogFile = getAsSecureLogFile();
 149
 150   return Options;
 151 }