1 //===--- ItaniumManglingCanonicalizer.h -------------------------*- 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 defines a class for computing equivalence classes of mangled names
11 // given a set of equivalences between name fragments.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_SUPPORT_ITANIUMMANGLINGCANONICALIZER_H
16 #define LLVM_SUPPORT_ITANIUMMANGLINGCANONICALIZER_H
18 #include "llvm/ADT/StringRef.h"
23 /// Canonicalizer for mangled names.
25 /// This class allows specifying a list of "equivalent" manglings. For example,
26 /// you can specify that Ss is equivalent to
27 /// NSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE
28 /// and then manglings that refer to libstdc++'s 'std::string' will be
29 /// considered equivalent to manglings that are the same except that they refer
30 /// to libc++'s 'std::string'.
32 /// This can be used when data (eg, profiling data) is available for a version
33 /// of a program built in a different configuration, with correspondingly
34 /// different manglings.
35 class ItaniumManglingCanonicalizer {
37 ItaniumManglingCanonicalizer();
38 ItaniumManglingCanonicalizer(const ItaniumManglingCanonicalizer &) = delete;
39 void operator=(const ItaniumManglingCanonicalizer &) = delete;
40 ~ItaniumManglingCanonicalizer();
42 enum class EquivalenceError {
45 /// Both the equivalent manglings have already been used as components of
46 /// some other mangling we've looked at. It's too late to add this
50 /// The first equivalent mangling is invalid.
53 /// The second equivalent mangling is invalid.
54 InvalidSecondMangling,
57 enum class FragmentKind {
58 /// The mangling fragment is a <name> (or a predefined <substitution>).
60 /// The mangling fragment is a <type>.
62 /// The mangling fragment is an <encoding>.
66 /// Add an equivalence between \p First and \p Second. Both manglings must
67 /// live at least as long as the canonicalizer.
68 EquivalenceError addEquivalence(FragmentKind Kind, StringRef First,
71 using Key = uintptr_t;
73 /// Form a canonical key for the specified mangling. They key will be the
74 /// same for all equivalent manglings, and different for any two
75 /// non-equivalent manglings, but is otherwise unspecified.
77 /// Returns Key() if (and only if) the mangling is not a valid Itanium C++
80 /// The string denoted by Mangling must live as long as the canonicalizer.
81 Key canonicalize(StringRef Mangling);
83 /// Find a canonical key for the specified mangling, if one has already been
84 /// formed. Otherwise returns Key().
85 Key lookup(StringRef Mangling);
93 #endif // LLVM_SUPPORT_ITANIUMMANGLINGCANONICALIZER_H