Author: d0k
Date: Wed Nov 22 07:38:23 2017
New Revision: 318840
URL: http://llvm.org/viewvc/llvm-project?rev=318840&view=rev
Log:
[FindAllSymbols] Cache regexes, creating them is expensive
This is a bit annoying because LLVM regexes are always mutable to store
errors. Assert that there are never errors and fix broken hardcoded
regexes.
Modified:
clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.cpp
clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.h
clang-tools-extra/trunk/include-fixer/find-all-symbols/STLPostfixHeaderMap.cpp
Modified:
clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.cpp
URL:
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.cpp?rev=318840&r1=318839&r2=318840&view=diff
==============================================================================
---
clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.cpp
(original)
+++
clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.cpp
Wed Nov 22 07:38:23 2017
@@ -13,6 +13,16 @@
namespace clang {
namespace find_all_symbols {
+HeaderMapCollector::HeaderMapCollector(
+ const RegexHeaderMap *RegexHeaderMappingTable) {
+ assert(RegexHeaderMappingTable);
+ this->RegexHeaderMappingTable.reserve(RegexHeaderMappingTable->size());
+ for (const auto &Entry : *RegexHeaderMappingTable) {
+ this->RegexHeaderMappingTable.emplace_back(llvm::Regex(Entry.first),
+ Entry.second);
+ }
+}
+
llvm::StringRef
HeaderMapCollector::getMappedHeader(llvm::StringRef Header) const {
auto Iter = HeaderMappingTable.find(Header);
@@ -20,11 +30,13 @@ HeaderMapCollector::getMappedHeader(llvm
return Iter->second;
// If there is no complete header name mapping for this header, check the
// regex header mapping.
- if (RegexHeaderMappingTable) {
- for (const auto &Entry : *RegexHeaderMappingTable) {
- if (llvm::Regex(Entry.first).match(Header))
- return Entry.second;
- }
+ for (auto &Entry : RegexHeaderMappingTable) {
+#ifndef NDEBUG
+ std::string Dummy;
+ assert(Entry.first.isValid(Dummy) && "Regex should never be invalid!");
+#endif
+ if (Entry.first.match(Header))
+ return Entry.second;
}
return Header;
}
Modified:
clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.h
URL:
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.h?rev=318840&r1=318839&r2=318840&view=diff
==============================================================================
--- clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.h
(original)
+++ clang-tools-extra/trunk/include-fixer/find-all-symbols/HeaderMapCollector.h
Wed Nov 22 07:38:23 2017
@@ -25,10 +25,8 @@ public:
typedef llvm::StringMap<std::string> HeaderMap;
typedef std::vector<std::pair<const char *, const char *>> RegexHeaderMap;
- HeaderMapCollector() : RegexHeaderMappingTable(nullptr) {}
-
- explicit HeaderMapCollector(const RegexHeaderMap *RegexHeaderMappingTable)
- : RegexHeaderMappingTable(RegexHeaderMappingTable) {}
+ HeaderMapCollector() = default;
+ explicit HeaderMapCollector(const RegexHeaderMap *RegexHeaderMappingTable);
void addHeaderMapping(llvm::StringRef OrignalHeaderPath,
llvm::StringRef MappingHeaderPath) {
@@ -47,8 +45,10 @@ private:
HeaderMap HeaderMappingTable;
// A map from header patterns to header names.
- // This is a reference to a hard-coded map.
- const RegexHeaderMap *const RegexHeaderMappingTable;
+ // The header names are not owned. This is only threadsafe because the
regexes
+ // never fail.
+ mutable std::vector<std::pair<llvm::Regex, const char *>>
+ RegexHeaderMappingTable;
};
} // namespace find_all_symbols
Modified:
clang-tools-extra/trunk/include-fixer/find-all-symbols/STLPostfixHeaderMap.cpp
URL:
http://llvm.org/viewvc/llvm-project/clang-tools-extra/trunk/include-fixer/find-all-symbols/STLPostfixHeaderMap.cpp?rev=318840&r1=318839&r2=318840&view=diff
==============================================================================
---
clang-tools-extra/trunk/include-fixer/find-all-symbols/STLPostfixHeaderMap.cpp
(original)
+++
clang-tools-extra/trunk/include-fixer/find-all-symbols/STLPostfixHeaderMap.cpp
Wed Nov 22 07:38:23 2017
@@ -314,10 +314,10 @@ const HeaderMapCollector::RegexHeaderMap
{"include/xlocale.h$", "<cstring>"},
{"bits/atomic_word.h$", "<memory>"},
{"bits/basic_file.h$", "<fstream>"},
- {"bits/c++allocator.h$", "<string>"},
- {"bits/c++config.h$", "<iosfwd>"},
- {"bits/c++io.h$", "<ios>"},
- {"bits/c++locale.h$", "<locale>"},
+ {"bits/c\\+\\+allocator.h$", "<string>"},
+ {"bits/c\\+\\+config.h$", "<iosfwd>"},
+ {"bits/c\\+\\+io.h$", "<ios>"},
+ {"bits/c\\+\\+locale.h$", "<locale>"},
{"bits/cpu_defines.h$", "<iosfwd>"},
{"bits/ctype_base.h$", "<locale>"},
{"bits/cxxabi_tweaks.h$", "<cxxabi.h>"},
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