Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Support/Chrono.h b/linux-x64/clang/include/llvm/Support/Chrono.h
new file mode 100644
index 0000000..994068a
--- /dev/null
+++ b/linux-x64/clang/include/llvm/Support/Chrono.h
@@ -0,0 +1,164 @@
+//===- llvm/Support/Chrono.h - Utilities for Timing Manipulation-*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_CHRONO_H
+#define LLVM_SUPPORT_CHRONO_H
+
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/FormatProviders.h"
+
+#include <chrono>
+#include <ctime>
+
+namespace llvm {
+
+class raw_ostream;
+
+namespace sys {
+
+/// A time point on the system clock. This is provided for two reasons:
+/// - to insulate us agains subtle differences in behavoir to differences in
+/// system clock precision (which is implementation-defined and differs between
+/// platforms).
+/// - to shorten the type name
+/// The default precision is nanoseconds. If need a specific precision specify
+/// it explicitly. If unsure, use the default. If you need a time point on a
+/// clock other than the system_clock, use std::chrono directly.
+template <typename D = std::chrono::nanoseconds>
+using TimePoint = std::chrono::time_point<std::chrono::system_clock, D>;
+
+/// Convert a TimePoint to std::time_t
+LLVM_ATTRIBUTE_ALWAYS_INLINE inline std::time_t toTimeT(TimePoint<> TP) {
+ using namespace std::chrono;
+ return system_clock::to_time_t(
+ time_point_cast<system_clock::time_point::duration>(TP));
+}
+
+/// Convert a std::time_t to a TimePoint
+LLVM_ATTRIBUTE_ALWAYS_INLINE inline TimePoint<std::chrono::seconds>
+toTimePoint(std::time_t T) {
+ using namespace std::chrono;
+ return time_point_cast<seconds>(system_clock::from_time_t(T));
+}
+
+} // namespace sys
+
+raw_ostream &operator<<(raw_ostream &OS, sys::TimePoint<> TP);
+
+/// Format provider for TimePoint<>
+///
+/// The options string is a strftime format string, with extensions:
+/// - %L is millis: 000-999
+/// - %f is micros: 000000-999999
+/// - %N is nanos: 000000000 - 999999999
+///
+/// If no options are given, the default format is "%Y-%m-%d %H:%M:%S.%N".
+template <>
+struct format_provider<sys::TimePoint<>> {
+ static void format(const sys::TimePoint<> &TP, llvm::raw_ostream &OS,
+ StringRef Style);
+};
+
+/// Implementation of format_provider<T> for duration types.
+///
+/// The options string of a duration type has the grammar:
+///
+/// duration_options ::= [unit][show_unit [number_options]]
+/// unit ::= `h`|`m`|`s`|`ms|`us`|`ns`
+/// show_unit ::= `+` | `-`
+/// number_options ::= options string for a integral or floating point type
+///
+/// Examples
+/// =================================
+/// | options | Input | Output |
+/// =================================
+/// | "" | 1s | 1 s |
+/// | "ms" | 1s | 1000 ms |
+/// | "ms-" | 1s | 1000 |
+/// | "ms-n" | 1s | 1,000 |
+/// | "" | 1.0s | 1.00 s |
+/// =================================
+///
+/// If the unit of the duration type is not one of the units specified above,
+/// it is still possible to format it, provided you explicitly request a
+/// display unit or you request that the unit is not displayed.
+
+namespace detail {
+template <typename Period> struct unit { static const char value[]; };
+template <typename Period> const char unit<Period>::value[] = "";
+
+template <> struct unit<std::ratio<3600>> { static const char value[]; };
+template <> struct unit<std::ratio<60>> { static const char value[]; };
+template <> struct unit<std::ratio<1>> { static const char value[]; };
+template <> struct unit<std::milli> { static const char value[]; };
+template <> struct unit<std::micro> { static const char value[]; };
+template <> struct unit<std::nano> { static const char value[]; };
+} // namespace detail
+
+template <typename Rep, typename Period>
+struct format_provider<std::chrono::duration<Rep, Period>> {
+private:
+ typedef std::chrono::duration<Rep, Period> Dur;
+ typedef typename std::conditional<
+ std::chrono::treat_as_floating_point<Rep>::value, double, intmax_t>::type
+ InternalRep;
+
+ template <typename AsPeriod> static InternalRep getAs(const Dur &D) {
+ using namespace std::chrono;
+ return duration_cast<duration<InternalRep, AsPeriod>>(D).count();
+ }
+
+ static std::pair<InternalRep, StringRef> consumeUnit(StringRef &Style,
+ const Dur &D) {
+ using namespace std::chrono;
+ if (Style.consume_front("ns"))
+ return {getAs<std::nano>(D), "ns"};
+ if (Style.consume_front("us"))
+ return {getAs<std::micro>(D), "us"};
+ if (Style.consume_front("ms"))
+ return {getAs<std::milli>(D), "ms"};
+ if (Style.consume_front("s"))
+ return {getAs<std::ratio<1>>(D), "s"};
+ if (Style.consume_front("m"))
+ return {getAs<std::ratio<60>>(D), "m"};
+ if (Style.consume_front("h"))
+ return {getAs<std::ratio<3600>>(D), "h"};
+ return {D.count(), detail::unit<Period>::value};
+ }
+
+ static bool consumeShowUnit(StringRef &Style) {
+ if (Style.empty())
+ return true;
+ if (Style.consume_front("-"))
+ return false;
+ if (Style.consume_front("+"))
+ return true;
+ assert(0 && "Unrecognised duration format");
+ return true;
+ }
+
+public:
+ static void format(const Dur &D, llvm::raw_ostream &Stream, StringRef Style) {
+ InternalRep count;
+ StringRef unit;
+ std::tie(count, unit) = consumeUnit(Style, D);
+ bool show_unit = consumeShowUnit(Style);
+
+ format_provider<InternalRep>::format(count, Stream, Style);
+
+ if (show_unit) {
+ assert(!unit.empty());
+ Stream << " " << unit;
+ }
+ }
+};
+
+} // namespace llvm
+
+#endif // LLVM_SUPPORT_CHRONO_H