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
18using 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
37MCOPT_EXP(bool, RelaxAll)
38MCOPT(bool, IncrementalLinkerCompatible)
39MCOPT(bool, FDPIC)
40MCOPT(int, DwarfVersion)
41MCOPT(bool, Dwarf64)
42MCOPT(EmitDwarfUnwindType, EmitDwarfUnwind)
43MCOPT(bool, EmitCompactUnwindNonCanonical)
44MCOPT(bool, ShowMCInst)
45MCOPT(bool, FatalWarnings)
46MCOPT(bool, NoWarn)
47MCOPT(bool, NoDeprecatedWarn)
48MCOPT(bool, NoTypeCheck)
49MCOPT(bool, SaveTempLabels)
50MCOPT(bool, Crel)
51MCOPT(bool, X86RelaxRelocations)
52MCOPT(bool, X86Sse2Avx)
53MCOPT(std::string, ABIName)
54MCOPT(std::string, AsSecureLogFile)
55
56llvm::mc::RegisterMCTargetOptionsFlags::RegisterMCTargetOptionsFlags() {
57#define MCBINDOPT(NAME) \
58 do { \
59 NAME##View = std::addressof(NAME); \
60 } while (0)
61
62 static cl::opt<bool> RelaxAll(
63 "mc-relax-all", cl::desc("When used with filetype=obj, relax all fixups "
64 "in the emitted object file"));
65 MCBINDOPT(RelaxAll);
66
67 static cl::opt<bool> IncrementalLinkerCompatible(
68 "incremental-linker-compatible",
69 cl::desc(
70 "When used with filetype=obj, "
71 "emit an object file which can be used with an incremental linker"));
72 MCBINDOPT(IncrementalLinkerCompatible);
73
74 static cl::opt<bool> FDPIC("fdpic", cl::desc("Use the FDPIC ABI"));
75 MCBINDOPT(FDPIC);
76
77 static cl::opt<int> DwarfVersion("dwarf-version", cl::desc("Dwarf version"),
78 cl::init(Val: 0));
79 MCBINDOPT(DwarfVersion);
80
81 static cl::opt<bool> Dwarf64(
82 "dwarf64",
83 cl::desc("Generate debugging info in the 64-bit DWARF format"));
84 MCBINDOPT(Dwarf64);
85
86 static cl::opt<EmitDwarfUnwindType> EmitDwarfUnwind(
87 "emit-dwarf-unwind", cl::desc("Whether to emit DWARF EH frame entries."),
88 cl::init(Val: EmitDwarfUnwindType::Default),
89 cl::values(clEnumValN(EmitDwarfUnwindType::Always, "always",
90 "Always emit EH frame entries"),
91 clEnumValN(EmitDwarfUnwindType::NoCompactUnwind,
92 "no-compact-unwind",
93 "Only emit EH frame entries when compact unwind is "
94 "not available"),
95 clEnumValN(EmitDwarfUnwindType::Default, "default",
96 "Use target platform default")));
97 MCBINDOPT(EmitDwarfUnwind);
98
99 static cl::opt<bool> EmitCompactUnwindNonCanonical(
100 "emit-compact-unwind-non-canonical",
101 cl::desc(
102 "Whether to try to emit Compact Unwind for non canonical entries."),
103 cl::init(
104 Val: false)); // By default, use DWARF for non-canonical personalities.
105 MCBINDOPT(EmitCompactUnwindNonCanonical);
106
107 static cl::opt<bool> ShowMCInst(
108 "asm-show-inst",
109 cl::desc("Emit internal instruction representation to assembly file"));
110 MCBINDOPT(ShowMCInst);
111
112 static cl::opt<bool> FatalWarnings("fatal-warnings",
113 cl::desc("Treat warnings as errors"));
114 MCBINDOPT(FatalWarnings);
115
116 static cl::opt<bool> NoWarn("no-warn", cl::desc("Suppress all warnings"));
117 static cl::alias NoWarnW("W", cl::desc("Alias for --no-warn"),
118 cl::aliasopt(NoWarn));
119 MCBINDOPT(NoWarn);
120
121 static cl::opt<bool> NoDeprecatedWarn(
122 "no-deprecated-warn", cl::desc("Suppress all deprecated warnings"));
123 MCBINDOPT(NoDeprecatedWarn);
124
125 static cl::opt<bool> NoTypeCheck(
126 "no-type-check", cl::desc("Suppress type errors (Wasm)"));
127 MCBINDOPT(NoTypeCheck);
128
129 static cl::opt<bool> SaveTempLabels(
130 "save-temp-labels", cl::desc("Don't discard temporary labels"));
131 MCBINDOPT(SaveTempLabels);
132
133 static cl::opt<bool> Crel("crel",
134 cl::desc("Use CREL relocation format for ELF"));
135 MCBINDOPT(Crel);
136
137 static cl::opt<bool> X86RelaxRelocations(
138 "x86-relax-relocations",
139 cl::desc(
140 "Emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL on x86-64 ELF"),
141 cl::init(Val: true));
142 MCBINDOPT(X86RelaxRelocations);
143
144 static cl::opt<bool> X86Sse2Avx(
145 "x86-sse2avx", cl::desc("Specify that the assembler should encode SSE "
146 "instructions with VEX prefix"));
147 MCBINDOPT(X86Sse2Avx);
148
149 static cl::opt<std::string> ABIName(
150 "target-abi", cl::Hidden,
151 cl::desc("The name of the ABI to be targeted from the backend."),
152 cl::init(Val: ""));
153 MCBINDOPT(ABIName);
154
155 static cl::opt<std::string> AsSecureLogFile(
156 "as-secure-log-file", cl::desc("As secure log file name"), cl::Hidden);
157 MCBINDOPT(AsSecureLogFile);
158
159#undef MCBINDOPT
160}
161
162MCTargetOptions llvm::mc::InitMCTargetOptionsFromFlags() {
163 MCTargetOptions Options;
164 Options.MCRelaxAll = getRelaxAll();
165 Options.MCIncrementalLinkerCompatible = getIncrementalLinkerCompatible();
166 Options.FDPIC = getFDPIC();
167 Options.Dwarf64 = getDwarf64();
168 Options.DwarfVersion = getDwarfVersion();
169 Options.ShowMCInst = getShowMCInst();
170 Options.ABIName = getABIName();
171 Options.MCFatalWarnings = getFatalWarnings();
172 Options.MCNoWarn = getNoWarn();
173 Options.MCNoDeprecatedWarn = getNoDeprecatedWarn();
174 Options.MCNoTypeCheck = getNoTypeCheck();
175 Options.MCSaveTempLabels = getSaveTempLabels();
176 Options.Crel = getCrel();
177 Options.X86RelaxRelocations = getX86RelaxRelocations();
178 Options.X86Sse2Avx = getX86Sse2Avx();
179 Options.EmitDwarfUnwind = getEmitDwarfUnwind();
180 Options.EmitCompactUnwindNonCanonical = getEmitCompactUnwindNonCanonical();
181 Options.AsSecureLogFile = getAsSecureLogFile();
182
183 return Options;
184}
185