1 //===- MCTargetOptions.h - MC Target Options --------------------*- 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 #ifndef LLVM_MC_MCTARGETOPTIONS_H
10 #define LLVM_MC_MCTARGETOPTIONS_H
11 
12 #include "llvm/ADT/ArrayRef.h"
13 #include "llvm/Support/Compression.h"
14 #include <string>
15 #include <vector>
16 
17 namespace llvm {
18 
19 enum class ExceptionHandling {
20   None,     ///< No exception support
21   DwarfCFI, ///< DWARF-like instruction based exceptions
22   SjLj,     ///< setjmp/longjmp based exceptions
23   ARM,      ///< ARM EHABI
24   WinEH,    ///< Windows Exception Handling
25   Wasm,     ///< WebAssembly Exception Handling
26   AIX,      ///< AIX Exception Handling
27 };
28 
29 enum class EmitDwarfUnwindType {
30   Always,          // Always emit dwarf unwind
31   NoCompactUnwind, // Only emit if compact unwind isn't available
32   Default,         // Default behavior is based on the target
33 };
34 
35 class StringRef;
36 
37 class MCTargetOptions {
38 public:
39   enum AsmInstrumentation {
40     AsmInstrumentationNone,
41     AsmInstrumentationAddress
42   };
43 
44   bool MCRelaxAll : 1;
45   bool MCNoExecStack : 1;
46   bool MCFatalWarnings : 1;
47   bool MCNoWarn : 1;
48   bool MCNoDeprecatedWarn : 1;
49   bool MCNoTypeCheck : 1;
50   bool MCSaveTempLabels : 1;
51   bool MCIncrementalLinkerCompatible : 1;
52   bool ShowMCEncoding : 1;
53   bool ShowMCInst : 1;
54   bool AsmVerbose : 1;
55 
56   /// Preserve Comments in Assembly.
57   bool PreserveAsmComments : 1;
58 
59   bool Dwarf64 : 1;
60 
61   EmitDwarfUnwindType EmitDwarfUnwind;
62 
63   int DwarfVersion = 0;
64 
65   enum DwarfDirectory {
66     // Force disable
67     DisableDwarfDirectory,
68     // Force enable, for assemblers that support
69     // `.file fileno directory filename' syntax
70     EnableDwarfDirectory,
71     // Default is based on the target
72     DefaultDwarfDirectory
73   };
74   DwarfDirectory MCUseDwarfDirectory;
75 
76   std::string ABIName;
77   std::string AssemblyLanguage;
78   std::string SplitDwarfFile;
79   std::string AsSecureLogFile;
80 
81   const char *Argv0 = nullptr;
82   ArrayRef<std::string> CommandLineArgs;
83 
84   /// Additional paths to search for `.include` directives when using the
85   /// integrated assembler.
86   std::vector<std::string> IASSearchPaths;
87 
88   MCTargetOptions();
89 
90   /// getABIName - If this returns a non-empty string this represents the
91   /// textual name of the ABI that we want the backend to use, e.g. o32, or
92   /// aapcs-linux.
93   StringRef getABIName() const;
94 
95   /// getAssemblyLanguage - If this returns a non-empty string this represents
96   /// the textual name of the assembly language that we will use for this
97   /// target, e.g. masm.
98   StringRef getAssemblyLanguage() const;
99 };
100 
101 } // end namespace llvm
102 
103 #endif // LLVM_MC_MCTARGETOPTIONS_H
104