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 <string>
14 #include <vector>
15 
16 namespace llvm {
17 
18 enum class ExceptionHandling {
19   None,     ///< No exception support
20   DwarfCFI, ///< DWARF-like instruction based exceptions
21   SjLj,     ///< setjmp/longjmp based exceptions
22   ARM,      ///< ARM EHABI
23   WinEH,    ///< Windows Exception Handling
24   Wasm,     ///< WebAssembly Exception Handling
25   AIX,      ///< AIX Exception Handling
26 };
27 
28 enum class DebugCompressionType {
29   None, ///< No compression
30   Z,    ///< zlib style complession
31 };
32 
33 enum class EmitDwarfUnwindType {
34   Always,          // Always emit dwarf unwind
35   NoCompactUnwind, // Only emit if compact unwind isn't available
36   Default,         // Default behavior is based on the target
37 };
38 
39 class StringRef;
40 
41 class MCTargetOptions {
42 public:
43   enum AsmInstrumentation {
44     AsmInstrumentationNone,
45     AsmInstrumentationAddress
46   };
47 
48   bool MCRelaxAll : 1;
49   bool MCNoExecStack : 1;
50   bool MCFatalWarnings : 1;
51   bool MCNoWarn : 1;
52   bool MCNoDeprecatedWarn : 1;
53   bool MCNoTypeCheck : 1;
54   bool MCSaveTempLabels : 1;
55   bool MCIncrementalLinkerCompatible : 1;
56   bool ShowMCEncoding : 1;
57   bool ShowMCInst : 1;
58   bool AsmVerbose : 1;
59 
60   /// Preserve Comments in Assembly.
61   bool PreserveAsmComments : 1;
62 
63   bool Dwarf64 : 1;
64 
65   EmitDwarfUnwindType EmitDwarfUnwind;
66 
67   int DwarfVersion = 0;
68 
69   enum DwarfDirectory {
70     // Force disable
71     DisableDwarfDirectory,
72     // Force enable, for assemblers that support
73     // `.file fileno directory filename' syntax
74     EnableDwarfDirectory,
75     // Default is based on the target
76     DefaultDwarfDirectory
77   };
78   DwarfDirectory MCUseDwarfDirectory;
79 
80   std::string ABIName;
81   std::string AssemblyLanguage;
82   std::string SplitDwarfFile;
83 
84   const char *Argv0 = nullptr;
85   ArrayRef<std::string> CommandLineArgs;
86 
87   /// Additional paths to search for `.include` directives when using the
88   /// integrated assembler.
89   std::vector<std::string> IASSearchPaths;
90 
91   MCTargetOptions();
92 
93   /// getABIName - If this returns a non-empty string this represents the
94   /// textual name of the ABI that we want the backend to use, e.g. o32, or
95   /// aapcs-linux.
96   StringRef getABIName() const;
97 
98   /// getAssemblyLanguage - If this returns a non-empty string this represents
99   /// the textual name of the assembly language that we will use for this
100   /// target, e.g. masm.
101   StringRef getAssemblyLanguage() const;
102 };
103 
104 } // end namespace llvm
105 
106 #endif // LLVM_MC_MCTARGETOPTIONS_H
107