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https://github.com/c64scene-ar/llvm-6502.git
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55c06ae7af
It works with clang, but GCC has different rules so we can't make all of those hidden. This reverts commit r190534. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190536 91177308-0d34-0410-b5e6-96231b3b80d8
126 lines
3.7 KiB
C++
126 lines
3.7 KiB
C++
//===-- llvm/CodeGen/DIEHash.h - Dwarf Hashing Framework -------*- C++ -*--===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for DWARF4 hashing of DIEs.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/MD5.h"
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namespace llvm {
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class CompileUnit;
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/// \brief An object containing the capability of hashing and adding hash
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/// attributes onto a DIE.
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class DIEHash {
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// The entry for a particular attribute.
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struct AttrEntry {
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const DIEValue *Val;
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const DIEAbbrevData *Desc;
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};
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// Collection of all attributes used in hashing a particular DIE.
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struct DIEAttrs {
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AttrEntry DW_AT_name;
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AttrEntry DW_AT_accessibility;
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AttrEntry DW_AT_address_class;
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AttrEntry DW_AT_allocated;
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AttrEntry DW_AT_artificial;
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AttrEntry DW_AT_associated;
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AttrEntry DW_AT_binary_scale;
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AttrEntry DW_AT_bit_offset;
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AttrEntry DW_AT_bit_size;
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AttrEntry DW_AT_bit_stride;
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AttrEntry DW_AT_byte_size;
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AttrEntry DW_AT_byte_stride;
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AttrEntry DW_AT_const_expr;
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AttrEntry DW_AT_const_value;
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AttrEntry DW_AT_containing_type;
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AttrEntry DW_AT_count;
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AttrEntry DW_AT_data_bit_offset;
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AttrEntry DW_AT_data_location;
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AttrEntry DW_AT_data_member_location;
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AttrEntry DW_AT_decimal_scale;
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AttrEntry DW_AT_decimal_sign;
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AttrEntry DW_AT_default_value;
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AttrEntry DW_AT_digit_count;
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AttrEntry DW_AT_discr;
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AttrEntry DW_AT_discr_list;
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AttrEntry DW_AT_discr_value;
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AttrEntry DW_AT_encoding;
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AttrEntry DW_AT_enum_class;
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AttrEntry DW_AT_endianity;
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AttrEntry DW_AT_explicit;
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AttrEntry DW_AT_is_optional;
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AttrEntry DW_AT_location;
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AttrEntry DW_AT_lower_bound;
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AttrEntry DW_AT_mutable;
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AttrEntry DW_AT_ordering;
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AttrEntry DW_AT_picture_string;
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AttrEntry DW_AT_prototyped;
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AttrEntry DW_AT_small;
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AttrEntry DW_AT_segment;
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AttrEntry DW_AT_string_length;
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AttrEntry DW_AT_threads_scaled;
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AttrEntry DW_AT_upper_bound;
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AttrEntry DW_AT_use_location;
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AttrEntry DW_AT_use_UTF8;
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AttrEntry DW_AT_variable_parameter;
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AttrEntry DW_AT_virtuality;
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AttrEntry DW_AT_visibility;
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AttrEntry DW_AT_vtable_elem_location;
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// Insert any additional ones here...
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};
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public:
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/// \brief Computes the ODR signature.
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uint64_t computeDIEODRSignature(DIE *Die);
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/// \brief Computes the CU signature.
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uint64_t computeCUSignature(DIE *Die);
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/// \brief Computes the type signature.
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uint64_t computeTypeSignature(DIE *Die);
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// Helper routines to process parts of a DIE.
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private:
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/// \brief Adds the parent context of \param Die to the hash.
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void addParentContext(DIE *Die);
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/// \brief Adds the attributes of \param Die to the hash.
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void addAttributes(DIE *Die);
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/// \brief Computes the full DWARF4 7.27 hash of the DIE.
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void computeHash(DIE *Die);
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// Routines that add DIEValues to the hash.
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private:
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/// \brief Encodes and adds \param Value to the hash as a ULEB128.
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void addULEB128(uint64_t Value);
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/// \brief Adds \param Str to the hash and includes a NULL byte.
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void addString(StringRef Str);
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/// \brief Collects the attributes of DIE \param Die into the \param Attrs
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/// structure.
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void collectAttributes(DIE *Die, DIEAttrs &Attrs);
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/// \brief Hashes the attributes in \param Attrs in order.
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void hashAttributes(const DIEAttrs &Attrs);
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/// \brief Hashes an individual attribute.
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void hashAttribute(AttrEntry Attr);
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private:
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MD5 Hash;
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};
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}
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