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to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351648
377 lines
13 KiB
C++
377 lines
13 KiB
C++
//===-------------- ItaniumManglingCanonicalizerTest.cpp ------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/ItaniumManglingCanonicalizer.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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#include "gtest/gtest.h"
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#include <cstdlib>
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#include <map>
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#include <vector>
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using namespace llvm;
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namespace {
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using EquivalenceError = llvm::ItaniumManglingCanonicalizer::EquivalenceError;
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using FragmentKind = llvm::ItaniumManglingCanonicalizer::FragmentKind;
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struct Equivalence {
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FragmentKind Kind;
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llvm::StringRef First;
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llvm::StringRef Second;
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};
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// A set of manglings that should all be considered equivalent.
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using EquivalenceClass = std::vector<llvm::StringRef>;
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struct Testcase {
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// A set of equivalences to register.
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std::vector<Equivalence> Equivalences;
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// A set of distinct equivalence classes created by registering the
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// equivalences.
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std::vector<EquivalenceClass> Classes;
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};
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// A function that returns a set of test cases.
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static std::vector<Testcase> getTestcases() {
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return {
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// Three different manglings for std::string (old libstdc++, new libstdc++,
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// libc++).
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{
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{
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{FragmentKind::Type, "Ss",
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"NSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE"},
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{FragmentKind::Type, "Ss",
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"NSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE"},
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},
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{
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{"_Z1fv"},
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{"_Z1fSs",
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"_Z1fNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE",
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"_Z1fNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE"},
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{"_ZNKSs4sizeEv",
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"_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv",
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"_ZNKSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEE4sizeEv"},
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}
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},
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// Check that substitutions are properly handled.
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{
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{
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// ::X <-> ::N::X<int>
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{FragmentKind::Type, "1X", "N1N1XIiEE"},
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// ::T<T<int, int>, T<int, int>> <-> T<int>
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{FragmentKind::Type, "1TIS_IiiES0_E", "1TIiE"},
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// A::B::foo <-> AB::foo
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{FragmentKind::Name, "N1A1B3fooE", "N2AB3fooE"},
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},
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{
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{"_Z1f1XPS_RS_", "_Z1fN1N1XIiEEPS1_RS1_"},
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{"_ZN1A1B3fooE1TIS1_IiiES2_EPS3_RS3_", "_ZN2AB3fooE1TIiEPS1_RS1_"},
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}
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},
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// Check that nested equivalences are properly handled.
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{
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{
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// std::__1::char_traits == std::__cxx11::char_traits
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// (Note that this is unused and should make no difference,
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// but it should not cause us to fail to match up the cases
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// below.)
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{FragmentKind::Name,
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"NSt3__111char_traitsE",
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"NSt7__cxx1111char_traitsE"},
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// std::__1::allocator == std::allocator
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{FragmentKind::Name,
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"NSt3__19allocatorE",
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"Sa"}, // "Sa" is not strictly a <name> but we accept it as one.
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// std::__1::vector == std::vector
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{FragmentKind::Name,
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"St6vector",
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"NSt3__16vectorE"},
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// std::__1::basic_string<
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// char
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// std::__1::char_traits<char>,
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// std::__1::allocator<char>> ==
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// std::__cxx11::basic_string<
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// char,
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// std::char_traits<char>,
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// std::allocator<char>>
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{FragmentKind::Type,
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"NSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE",
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"NSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE"},
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// X<A> <-> X<B>
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{FragmentKind::Type, "1XI1AE", "1XI1BE"},
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// X <-> Y
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{FragmentKind::Name, "1X", "1Y"},
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},
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{
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// f(std::string)
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{"_Z1fNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE",
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"_Z1fNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE"},
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// f(std::vector<int>)
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{"_Z1fSt6vectorIiSaIiEE", "_Z1fNSt3__16vectorIiNS_9allocatorIiEEEE"},
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// f(X<A>), f(X<B>), f(Y<A>), f(Y<B>)
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{"_Z1f1XI1AE", "_Z1f1XI1BE", "_Z1f1YI1AE", "_Z1f1YI1BE"},
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// f(X<C>), f(Y<C>)
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{"_Z1f1XI1CE", "_Z1f1YI1CE"},
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}
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},
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// Check namespace equivalences.
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{
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{
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// std::__1 == std::__cxx11
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{FragmentKind::Name, "St3__1", "St7__cxx11"},
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// std::__1::allocator == std::allocator
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{FragmentKind::Name, "NSt3__19allocatorE", "Sa"},
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// std::vector == std::__1::vector
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{FragmentKind::Name, "St6vector", "NSt3__16vectorE"},
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// std::__cxx11::char_traits == std::char_traits
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// (This indirectly means that std::__1::char_traits == std::char_traits,
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// due to the std::__cxx11 == std::__1 equivalence, which is what we rely
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// on below.)
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{FragmentKind::Name, "NSt7__cxx1111char_traitsE", "St11char_traits"},
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},
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{
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// f(std::foo)
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{"_Z1fNSt7__cxx113fooE",
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"_Z1fNSt3__13fooE"},
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// f(std::string)
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{"_Z1fNSt7__cxx1111char_traitsIcEE",
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"_Z1fNSt3__111char_traitsIcEE",
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"_Z1fSt11char_traitsIcE"},
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// f(std::string)
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{"_Z1fNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE",
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"_Z1fNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE"},
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// f(std::vector<int>)
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{"_Z1fSt6vectorIiSaIiEE", "_Z1fNSt3__16vectorIiNS_9allocatorIiEEEE"},
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}
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},
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// Check namespace equivalences for namespace 'std'. We support using 'St'
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// for this, despite it not technically being a <name>.
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{
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{
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// std::__1 == std
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{FragmentKind::Name, "St3__1", "St"},
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// std::__1 == std::__cxx11
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{FragmentKind::Name, "St3__1", "St7__cxx11"},
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// FIXME: Should a 'std' equivalence also cover the predefined
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// substitutions?
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// std::__1::allocator == std::allocator
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{FragmentKind::Name, "NSt3__19allocatorE", "Sa"},
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},
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{
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{"_Z1fSt3foo", "_Z1fNSt3__13fooE", "_Z1fNSt7__cxx113fooE"},
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{"_Z1fNSt3bar3bazE", "_Z1fNSt3__13bar3bazE"},
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// f(std::string)
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{"_Z1fNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEE",
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"_Z1fNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE"},
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// f(std::vector<int>)
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{"_Z1fSt6vectorIiSaIiEE", "_Z1fNSt3__16vectorIiNS_9allocatorIiEEEE"},
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}
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},
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// Check mutually-recursive equivalences.
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{
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{
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{FragmentKind::Type, "1A", "1B"},
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{FragmentKind::Type, "1A", "1C"},
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{FragmentKind::Type, "1D", "1B"},
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{FragmentKind::Type, "1C", "1E"},
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},
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{
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{"_Z1f1A", "_Z1f1B", "_Z1f1C", "_Z1f1D", "_Z1f1E"},
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{"_Z1f1F"},
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}
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},
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// Check <encoding>s.
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{
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{
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{FragmentKind::Encoding, "1fv", "1gv"},
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},
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{
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// f(void) -> g(void)
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{"_Z1fv", "_Z1gv"},
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// static local 'n' in f(void) -> static local 'n' in g(void)
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{"_ZZ1fvE1n", "_ZZ1gvE1n"},
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}
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},
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// Corner case: the substitution can appear within its own expansion.
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{
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{
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// X <-> Y<X>
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{FragmentKind::Type, "1X", "1YI1XE"},
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// A<B> <-> B
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{FragmentKind::Type, "1AI1BE", "1B"},
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},
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{
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// f(X) == f(Y<X>) == f(Y<Y<X>>) == f(Y<Y<Y<X>>>)
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{"_Z1f1X", "_Z1f1YI1XE", "_Z1f1YIS_I1XEE", "_Z1f1YIS_IS_I1XEEE"},
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// f(B) == f(A<B>) == f(A<A<B>>) == f(A<A<A<B>>>)
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{"_Z1f1B", "_Z1f1AI1BE", "_Z1f1AIS_I1BEE", "_Z1f1AIS_IS_I1BEEE"},
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}
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},
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// Redundant equivalences are accepted (and have no effect).
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{
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{
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{FragmentKind::Name, "3std", "St"},
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{FragmentKind::Name, "1X", "1Y"},
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{FragmentKind::Name, "N1X1ZE", "N1Y1ZE"},
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},
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{}
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},
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// Check that ctor and dtor variants are considered distinct.
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{
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{},
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{{"_ZN1XC1Ev"}, {"_ZN1XC2Ev"}, {"_ZN1XD1Ev"}, {"_ZN1XD2Ev"}}
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},
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// Ensure array types with and without bounds are handled properly.
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{
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{
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{FragmentKind::Type, "A_i", "A1_f"},
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},
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{
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{"_Z1fRA_i", "_Z1fRA_i", "_Z1fRA1_f"},
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{"_Z1fRA1_i"}, {"_Z1fRA_f"},
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}
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},
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};
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}
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// A function to get a set of test cases for forward template references.
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static std::vector<Testcase> getForwardTemplateReferenceTestcases() {
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return {
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// ForwardTemplateReference does not support canonicalization.
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// FIXME: We should consider ways of fixing this, perhaps by eliminating
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// the ForwardTemplateReference node with a tree transformation.
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{
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{
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// X::operator T() <with T = A> == Y::operator T() <with T = A>
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{FragmentKind::Encoding, "N1XcvT_I1AEEv", "N1YcvT_I1AEEv"},
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// A == B
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{FragmentKind::Name, "1A", "1B"},
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},
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{
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// All combinations result in unique equivalence classes.
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{"_ZN1XcvT_I1AEEv"},
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{"_ZN1XcvT_I1BEEv"},
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{"_ZN1YcvT_I1AEEv"},
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{"_ZN1YcvT_I1BEEv"},
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// Even giving the same string twice gives a new class.
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{"_ZN1XcvT_I1AEEv"},
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}
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},
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};
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}
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template<bool CanonicalizeFirst>
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static void testTestcases(ArrayRef<Testcase> Testcases) {
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for (const auto &Testcase : Testcases) {
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llvm::ItaniumManglingCanonicalizer Canonicalizer;
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for (const auto &Equiv : Testcase.Equivalences) {
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auto Result =
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Canonicalizer.addEquivalence(Equiv.Kind, Equiv.First, Equiv.Second);
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EXPECT_EQ(Result, EquivalenceError::Success)
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<< "couldn't add equivalence between " << Equiv.First << " and "
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<< Equiv.Second;
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}
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using CanonKey = llvm::ItaniumManglingCanonicalizer::Key;
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std::map<const EquivalenceClass*, CanonKey> Keys;
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if (CanonicalizeFirst)
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for (const auto &Class : Testcase.Classes)
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Keys.insert({&Class, Canonicalizer.canonicalize(*Class.begin())});
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std::map<CanonKey, llvm::StringRef> Found;
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for (const auto &Class : Testcase.Classes) {
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CanonKey ClassKey = Keys[&Class];
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for (llvm::StringRef Str : Class) {
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// Force a copy to be made when calling lookup to test that it doesn't
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// retain any part of the provided string.
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CanonKey ThisKey = CanonicalizeFirst
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? Canonicalizer.lookup(std::string(Str))
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: Canonicalizer.canonicalize(Str);
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EXPECT_NE(ThisKey, CanonKey()) << "couldn't canonicalize " << Str;
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if (ClassKey) {
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EXPECT_EQ(ThisKey, ClassKey)
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<< Str << " not in the same class as " << *Class.begin();
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} else {
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ClassKey = ThisKey;
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}
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}
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EXPECT_TRUE(Found.insert({ClassKey, *Class.begin()}).second)
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<< *Class.begin() << " is in the same class as " << Found[ClassKey];
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}
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}
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}
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TEST(ItaniumManglingCanonicalizerTest, TestCanonicalize) {
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testTestcases<false>(getTestcases());
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}
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TEST(ItaniumManglingCanonicalizerTest, TestLookup) {
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testTestcases<true>(getTestcases());
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}
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TEST(ItaniumManglingCanonicalizerTest, TestForwardTemplateReference) {
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// lookup(...) after canonicalization (intentionally) returns different
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// values for this testcase.
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testTestcases<false>(getForwardTemplateReferenceTestcases());
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}
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TEST(ItaniumManglingCanonicalizerTest, TestInvalidManglings) {
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llvm::ItaniumManglingCanonicalizer Canonicalizer;
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EXPECT_EQ(Canonicalizer.addEquivalence(FragmentKind::Type, "", "1X"),
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EquivalenceError::InvalidFirstMangling);
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EXPECT_EQ(Canonicalizer.addEquivalence(FragmentKind::Type, "1X", "1ab"),
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EquivalenceError::InvalidSecondMangling);
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EXPECT_EQ(Canonicalizer.canonicalize("_Z3fooE"),
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llvm::ItaniumManglingCanonicalizer::Key());
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EXPECT_EQ(Canonicalizer.canonicalize("foo"),
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llvm::ItaniumManglingCanonicalizer::Key());
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// A reference to a template parameter ('T_' etc) cannot appear in a <name>,
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// because we don't have template arguments to bind to it. (The arguments in
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// an 'I ... E' construct in the <name> aren't registered as
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// backreferenceable arguments in this sense, because they're not part of
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// the template argument list of an <encoding>.
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EXPECT_EQ(Canonicalizer.addEquivalence(FragmentKind::Name, "N1XcvT_I1AEE",
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"1f"),
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EquivalenceError::InvalidFirstMangling);
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}
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TEST(ItaniumManglingCanonicalizerTest, TestBadEquivalenceOrder) {
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llvm::ItaniumManglingCanonicalizer Canonicalizer;
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EXPECT_EQ(Canonicalizer.addEquivalence(FragmentKind::Type, "N1P1XE", "N1Q1XE"),
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EquivalenceError::Success);
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EXPECT_EQ(Canonicalizer.addEquivalence(FragmentKind::Type, "1P", "1Q"),
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EquivalenceError::ManglingAlreadyUsed);
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EXPECT_EQ(Canonicalizer.addEquivalence(FragmentKind::Type, "N1C1XE", "N1A1YE"),
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EquivalenceError::Success);
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EXPECT_EQ(Canonicalizer.addEquivalence(FragmentKind::Type, "1A", "1B"),
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EquivalenceError::Success);
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EXPECT_EQ(Canonicalizer.addEquivalence(FragmentKind::Type, "1C", "1D"),
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EquivalenceError::Success);
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EXPECT_EQ(Canonicalizer.addEquivalence(FragmentKind::Type, "1B", "1D"),
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EquivalenceError::ManglingAlreadyUsed);
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}
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} // end anonymous namespace
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