1 //===-- TypeIndex.cpp - CodeView type index ---------------------*- 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 #include "llvm/DebugInfo/CodeView/TypeIndex.h"
10 
11 #include "llvm/DebugInfo/CodeView/TypeCollection.h"
12 #include "llvm/Support/ScopedPrinter.h"
13 
14 using namespace llvm;
15 using namespace llvm::codeview;
16 
17 namespace {
18 struct SimpleTypeEntry {
19   StringRef Name;
20   SimpleTypeKind Kind;
21 };
22 
23 /// The names here all end in "*". If the simple type is a pointer type, we
24 /// return the whole name. Otherwise we lop off the last character in our
25 /// StringRef.
26 static const SimpleTypeEntry SimpleTypeNames[] = {
27     {"void*", SimpleTypeKind::Void},
28     {"<not translated>*", SimpleTypeKind::NotTranslated},
29     {"HRESULT*", SimpleTypeKind::HResult},
30     {"signed char*", SimpleTypeKind::SignedCharacter},
31     {"unsigned char*", SimpleTypeKind::UnsignedCharacter},
32     {"char*", SimpleTypeKind::NarrowCharacter},
33     {"wchar_t*", SimpleTypeKind::WideCharacter},
34     {"char16_t*", SimpleTypeKind::Character16},
35     {"char32_t*", SimpleTypeKind::Character32},
36     {"__int8*", SimpleTypeKind::SByte},
37     {"unsigned __int8*", SimpleTypeKind::Byte},
38     {"short*", SimpleTypeKind::Int16Short},
39     {"unsigned short*", SimpleTypeKind::UInt16Short},
40     {"__int16*", SimpleTypeKind::Int16},
41     {"unsigned __int16*", SimpleTypeKind::UInt16},
42     {"long*", SimpleTypeKind::Int32Long},
43     {"unsigned long*", SimpleTypeKind::UInt32Long},
44     {"int*", SimpleTypeKind::Int32},
45     {"unsigned*", SimpleTypeKind::UInt32},
46     {"__int64*", SimpleTypeKind::Int64Quad},
47     {"unsigned __int64*", SimpleTypeKind::UInt64Quad},
48     {"__int64*", SimpleTypeKind::Int64},
49     {"unsigned __int64*", SimpleTypeKind::UInt64},
50     {"__int128*", SimpleTypeKind::Int128},
51     {"unsigned __int128*", SimpleTypeKind::UInt128},
52     {"__half*", SimpleTypeKind::Float16},
53     {"float*", SimpleTypeKind::Float32},
54     {"float*", SimpleTypeKind::Float32PartialPrecision},
55     {"__float48*", SimpleTypeKind::Float48},
56     {"double*", SimpleTypeKind::Float64},
57     {"long double*", SimpleTypeKind::Float80},
58     {"__float128*", SimpleTypeKind::Float128},
59     {"_Complex float*", SimpleTypeKind::Complex32},
60     {"_Complex double*", SimpleTypeKind::Complex64},
61     {"_Complex long double*", SimpleTypeKind::Complex80},
62     {"_Complex __float128*", SimpleTypeKind::Complex128},
63     {"bool*", SimpleTypeKind::Boolean8},
64     {"__bool16*", SimpleTypeKind::Boolean16},
65     {"__bool32*", SimpleTypeKind::Boolean32},
66     {"__bool64*", SimpleTypeKind::Boolean64},
67 };
68 } // namespace
69 
70 StringRef TypeIndex::simpleTypeName(TypeIndex TI) {
71   assert(TI.isNoneType() || TI.isSimple());
72 
73   if (TI.isNoneType())
74     return "<no type>";
75 
76   if (TI == TypeIndex::NullptrT())
77     return "std::nullptr_t";
78 
79   // This is a simple type.
80   for (const auto &SimpleTypeName : SimpleTypeNames) {
81     if (SimpleTypeName.Kind == TI.getSimpleKind()) {
82       if (TI.getSimpleMode() == SimpleTypeMode::Direct)
83         return SimpleTypeName.Name.drop_back(1);
84       // Otherwise, this is a pointer type. We gloss over the distinction
85       // between near, far, 64, 32, etc, and just give a pointer type.
86       return SimpleTypeName.Name;
87     }
88   }
89   return "<unknown simple type>";
90 }
91 
92 void llvm::codeview::printTypeIndex(ScopedPrinter &Printer, StringRef FieldName,
93                                     TypeIndex TI, TypeCollection &Types) {
94   StringRef TypeName;
95   if (!TI.isNoneType()) {
96     if (TI.isSimple())
97       TypeName = TypeIndex::simpleTypeName(TI);
98     else
99       TypeName = Types.getTypeName(TI);
100   }
101 
102   if (!TypeName.empty())
103     Printer.printHex(FieldName, TypeName, TI.getIndex());
104   else
105     Printer.printHex(FieldName, TI.getIndex());
106 }
107