#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DIEHASH_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_DIEHASH_H
#include "llvm/ADT/DenseMap.h"
#include "llvm/CodeGen/DIE.h"
#include "llvm/Support/MD5.h"
namespace llvm {
class AsmPrinter;
class CompileUnit;
class DIEHash {
struct AttrEntry {
const DIEValue *Val;
const DIEAbbrevData *Desc;
};
struct DIEAttrs {
AttrEntry DW_AT_name;
AttrEntry DW_AT_accessibility;
AttrEntry DW_AT_address_class;
AttrEntry DW_AT_allocated;
AttrEntry DW_AT_artificial;
AttrEntry DW_AT_associated;
AttrEntry DW_AT_binary_scale;
AttrEntry DW_AT_bit_offset;
AttrEntry DW_AT_bit_size;
AttrEntry DW_AT_bit_stride;
AttrEntry DW_AT_byte_size;
AttrEntry DW_AT_byte_stride;
AttrEntry DW_AT_const_expr;
AttrEntry DW_AT_const_value;
AttrEntry DW_AT_containing_type;
AttrEntry DW_AT_count;
AttrEntry DW_AT_data_bit_offset;
AttrEntry DW_AT_data_location;
AttrEntry DW_AT_data_member_location;
AttrEntry DW_AT_decimal_scale;
AttrEntry DW_AT_decimal_sign;
AttrEntry DW_AT_default_value;
AttrEntry DW_AT_digit_count;
AttrEntry DW_AT_discr;
AttrEntry DW_AT_discr_list;
AttrEntry DW_AT_discr_value;
AttrEntry DW_AT_encoding;
AttrEntry DW_AT_enum_class;
AttrEntry DW_AT_endianity;
AttrEntry DW_AT_explicit;
AttrEntry DW_AT_is_optional;
AttrEntry DW_AT_location;
AttrEntry DW_AT_lower_bound;
AttrEntry DW_AT_mutable;
AttrEntry DW_AT_ordering;
AttrEntry DW_AT_picture_string;
AttrEntry DW_AT_prototyped;
AttrEntry DW_AT_small;
AttrEntry DW_AT_segment;
AttrEntry DW_AT_string_length;
AttrEntry DW_AT_threads_scaled;
AttrEntry DW_AT_upper_bound;
AttrEntry DW_AT_use_location;
AttrEntry DW_AT_use_UTF8;
AttrEntry DW_AT_variable_parameter;
AttrEntry DW_AT_virtuality;
AttrEntry DW_AT_visibility;
AttrEntry DW_AT_vtable_elem_location;
AttrEntry DW_AT_type;
};
public:
DIEHash(AsmPrinter *A = nullptr) : AP(A) {}
uint64_t computeDIEODRSignature(const DIE &Die);
uint64_t computeCUSignature(const DIE &Die);
uint64_t computeTypeSignature(const DIE &Die);
private:
void addParentContext(const DIE &Die);
void addAttributes(const DIE &Die);
void computeHash(const DIE &Die);
public:
void update(uint8_t Value) { Hash.update(Value); }
void addULEB128(uint64_t Value);
void addSLEB128(int64_t Value);
private:
void addString(StringRef Str);
void collectAttributes(const DIE &Die, DIEAttrs &Attrs);
void hashAttributes(const DIEAttrs &Attrs, dwarf::Tag Tag);
void hashBlockData(const SmallVectorImpl<DIEValue *> &Values);
void hashLocList(const DIELocList &LocList);
void hashAttribute(AttrEntry Attr, dwarf::Tag Tag);
void hashDIEEntry(dwarf::Attribute Attribute, dwarf::Tag Tag,
const DIE &Entry);
void hashShallowTypeReference(dwarf::Attribute Attribute, const DIE &Entry,
StringRef Name);
void hashRepeatedTypeReference(dwarf::Attribute Attribute,
unsigned DieNumber);
void hashNestedType(const DIE &Die, StringRef Name);
private:
MD5 Hash;
AsmPrinter *AP;
DenseMap<const DIE *, unsigned> Numbering;
};
}
#endif