1 //===-- llvm/CodeGen/DIEHash.h - Dwarf Hashing Framework -------*- C++ -*--===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains support for DWARF4 hashing of DIEs.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Support/MD5.h"
20 /// \brief An object containing the capability of hashing and adding hash
21 /// attributes onto a DIE.
23 // The entry for a particular attribute.
26 const DIEAbbrevData *Desc;
29 // Collection of all attributes used in hashing a particular DIE.
32 AttrEntry DW_AT_accessibility;
33 AttrEntry DW_AT_address_class;
34 AttrEntry DW_AT_allocated;
35 AttrEntry DW_AT_artificial;
36 AttrEntry DW_AT_associated;
37 AttrEntry DW_AT_binary_scale;
38 AttrEntry DW_AT_bit_offset;
39 AttrEntry DW_AT_bit_size;
40 AttrEntry DW_AT_bit_stride;
41 AttrEntry DW_AT_byte_size;
42 AttrEntry DW_AT_byte_stride;
43 AttrEntry DW_AT_const_expr;
44 AttrEntry DW_AT_const_value;
45 AttrEntry DW_AT_containing_type;
46 AttrEntry DW_AT_count;
47 AttrEntry DW_AT_data_bit_offset;
48 AttrEntry DW_AT_data_location;
49 AttrEntry DW_AT_data_member_location;
50 AttrEntry DW_AT_decimal_scale;
51 AttrEntry DW_AT_decimal_sign;
52 AttrEntry DW_AT_default_value;
53 AttrEntry DW_AT_digit_count;
54 AttrEntry DW_AT_discr;
55 AttrEntry DW_AT_discr_list;
56 AttrEntry DW_AT_discr_value;
57 AttrEntry DW_AT_encoding;
58 AttrEntry DW_AT_enum_class;
59 AttrEntry DW_AT_endianity;
60 AttrEntry DW_AT_explicit;
61 AttrEntry DW_AT_is_optional;
62 AttrEntry DW_AT_location;
63 AttrEntry DW_AT_lower_bound;
64 AttrEntry DW_AT_mutable;
65 AttrEntry DW_AT_ordering;
66 AttrEntry DW_AT_picture_string;
67 AttrEntry DW_AT_prototyped;
68 AttrEntry DW_AT_small;
69 AttrEntry DW_AT_segment;
70 AttrEntry DW_AT_string_length;
71 AttrEntry DW_AT_threads_scaled;
72 AttrEntry DW_AT_upper_bound;
73 AttrEntry DW_AT_use_location;
74 AttrEntry DW_AT_use_UTF8;
75 AttrEntry DW_AT_variable_parameter;
76 AttrEntry DW_AT_virtuality;
77 AttrEntry DW_AT_visibility;
78 AttrEntry DW_AT_vtable_elem_location;
80 // Insert any additional ones here...
84 /// \brief Computes the ODR signature.
85 uint64_t computeDIEODRSignature(DIE *Die);
87 /// \brief Computes the CU signature.
88 uint64_t computeCUSignature(DIE *Die);
90 /// \brief Computes the type signature.
91 uint64_t computeTypeSignature(DIE *Die);
93 // Helper routines to process parts of a DIE.
95 /// \brief Adds the parent context of \param Die to the hash.
96 void addParentContext(DIE *Die);
98 /// \brief Adds the attributes of \param Die to the hash.
99 void addAttributes(DIE *Die);
101 /// \brief Computes the full DWARF4 7.27 hash of the DIE.
102 void computeHash(DIE *Die);
104 // Routines that add DIEValues to the hash.
106 /// \brief Encodes and adds \param Value to the hash as a ULEB128.
107 void addULEB128(uint64_t Value);
109 /// \brief Adds \param Str to the hash and includes a NULL byte.
110 void addString(StringRef Str);
112 /// \brief Collects the attributes of DIE \param Die into the \param Attrs
114 void collectAttributes(DIE *Die, DIEAttrs &Attrs);
116 /// \brief Hashes the attributes in \param Attrs in order.
117 void hashAttributes(const DIEAttrs &Attrs);
119 /// \brief Hashes an individual attribute.
120 void hashAttribute(AttrEntry Attr);