Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Support/Options.h b/linux-x64/clang/include/llvm/Support/Options.h
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+//===- llvm/Support/Options.h - Debug options support -----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// This file declares helper objects for defining debug options that can be
+/// configured via the command line. The new API currently builds on the cl::opt
+/// API, but does not require the use of static globals.
+///
+/// With this API options are registered during initialization. For passes, this
+/// happens during pass initialization. Passes with options will call a static
+/// registerOptions method during initialization that registers options with the
+/// OptionRegistry. An example implementation of registerOptions is:
+///
+/// static void registerOptions() {
+/// OptionRegistry::registerOption<bool, Scalarizer,
+/// &Scalarizer::ScalarizeLoadStore>(
+/// "scalarize-load-store",
+/// "Allow the scalarizer pass to scalarize loads and store", false);
+/// }
+///
+/// When reading data for options the interface is via the LLVMContext. Option
+/// data for passes should be read from the context during doInitialization. An
+/// example of reading the above option would be:
+///
+/// ScalarizeLoadStore =
+/// M.getContext().getOption<bool,
+/// Scalarizer,
+/// &Scalarizer::ScalarizeLoadStore>();
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_OPTIONS_H
+#define LLVM_SUPPORT_OPTIONS_H
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/Support/CommandLine.h"
+
+namespace llvm {
+
+namespace detail {
+
+// Options are keyed of the unique address of a static character synthesized
+// based on template arguments.
+template <typename ValT, typename Base, ValT(Base::*Mem)> class OptionKey {
+public:
+ static char ID;
+};
+
+template <typename ValT, typename Base, ValT(Base::*Mem)>
+char OptionKey<ValT, Base, Mem>::ID = 0;
+
+} // namespace detail
+
+/// \brief Singleton class used to register debug options.
+///
+/// The OptionRegistry is responsible for managing lifetimes of the options and
+/// provides interfaces for option registration and reading values from options.
+/// This object is a singleton, only one instance should ever exist so that all
+/// options are registered in the same place.
+class OptionRegistry {
+private:
+ DenseMap<void *, cl::Option *> Options;
+
+ /// \brief Adds a cl::Option to the registry.
+ ///
+ /// \param Key unique key for option
+ /// \param O option to map to \p Key
+ ///
+ /// Allocated cl::Options are owned by the OptionRegistry and are deallocated
+ /// on destruction or removal
+ void addOption(void *Key, cl::Option *O);
+
+public:
+ ~OptionRegistry();
+ OptionRegistry() {}
+
+ /// \brief Returns a reference to the singleton instance.
+ static OptionRegistry &instance();
+
+ /// \brief Registers an option with the OptionRegistry singleton.
+ ///
+ /// \tparam ValT type of the option's data
+ /// \tparam Base class used to key the option
+ /// \tparam Mem member of \p Base used for keying the option
+ ///
+ /// Options are keyed off the template parameters to generate unique static
+ /// characters. The template parameters are (1) the type of the data the
+ /// option stores (\p ValT), the class that will read the option (\p Base),
+ /// and the member that the class will store the data into (\p Mem).
+ template <typename ValT, typename Base, ValT(Base::*Mem)>
+ static void registerOption(StringRef ArgStr, StringRef Desc,
+ const ValT &InitValue) {
+ cl::opt<ValT> *Option = new cl::opt<ValT>(ArgStr, cl::desc(Desc),
+ cl::Hidden, cl::init(InitValue));
+ instance().addOption(&detail::OptionKey<ValT, Base, Mem>::ID, Option);
+ }
+
+ /// \brief Returns the value of the option.
+ ///
+ /// \tparam ValT type of the option's data
+ /// \tparam Base class used to key the option
+ /// \tparam Mem member of \p Base used for keying the option
+ ///
+ /// Reads option values based on the key generated by the template parameters.
+ /// Keying for get() is the same as keying for registerOption.
+ template <typename ValT, typename Base, ValT(Base::*Mem)> ValT get() const {
+ auto It = Options.find(&detail::OptionKey<ValT, Base, Mem>::ID);
+ assert(It != Options.end() && "Option not in OptionRegistry");
+ return *(cl::opt<ValT> *)It->second;
+ }
+};
+
+} // namespace llvm
+
+#endif