Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Support/Endian.h b/linux-x64/clang/include/llvm/Support/Endian.h
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+++ b/linux-x64/clang/include/llvm/Support/Endian.h
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+//===- Endian.h - Utilities for IO with endian specific data ----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares generic functions to read and write endian specific data.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_ENDIAN_H
+#define LLVM_SUPPORT_ENDIAN_H
+
+#include "llvm/Support/AlignOf.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/SwapByteOrder.h"
+#include <cassert>
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
+#include <type_traits>
+
+namespace llvm {
+namespace support {
+
+enum endianness {big, little, native};
+
+// These are named values for common alignments.
+enum {aligned = 0, unaligned = 1};
+
+namespace detail {
+
+/// \brief ::value is either alignment, or alignof(T) if alignment is 0.
+template<class T, int alignment>
+struct PickAlignment {
+ enum { value = alignment == 0 ? alignof(T) : alignment };
+};
+
+} // end namespace detail
+
+namespace endian {
+
+constexpr endianness system_endianness() {
+ return sys::IsBigEndianHost ? big : little;
+}
+
+template <typename value_type>
+inline value_type byte_swap(value_type value, endianness endian) {
+ if ((endian != native) && (endian != system_endianness()))
+ sys::swapByteOrder(value);
+ return value;
+}
+
+/// Swap the bytes of value to match the given endianness.
+template<typename value_type, endianness endian>
+inline value_type byte_swap(value_type value) {
+ return byte_swap(value, endian);
+}
+
+/// Read a value of a particular endianness from memory.
+template <typename value_type, std::size_t alignment>
+inline value_type read(const void *memory, endianness endian) {
+ value_type ret;
+
+ memcpy(&ret,
+ LLVM_ASSUME_ALIGNED(
+ memory, (detail::PickAlignment<value_type, alignment>::value)),
+ sizeof(value_type));
+ return byte_swap<value_type>(ret, endian);
+}
+
+template<typename value_type,
+ endianness endian,
+ std::size_t alignment>
+inline value_type read(const void *memory) {
+ return read<value_type, alignment>(memory, endian);
+}
+
+/// Read a value of a particular endianness from a buffer, and increment the
+/// buffer past that value.
+template <typename value_type, std::size_t alignment, typename CharT>
+inline value_type readNext(const CharT *&memory, endianness endian) {
+ value_type ret = read<value_type, alignment>(memory, endian);
+ memory += sizeof(value_type);
+ return ret;
+}
+
+template<typename value_type, endianness endian, std::size_t alignment,
+ typename CharT>
+inline value_type readNext(const CharT *&memory) {
+ return readNext<value_type, alignment, CharT>(memory, endian);
+}
+
+/// Write a value to memory with a particular endianness.
+template <typename value_type, std::size_t alignment>
+inline void write(void *memory, value_type value, endianness endian) {
+ value = byte_swap<value_type>(value, endian);
+ memcpy(LLVM_ASSUME_ALIGNED(
+ memory, (detail::PickAlignment<value_type, alignment>::value)),
+ &value, sizeof(value_type));
+}
+
+template<typename value_type,
+ endianness endian,
+ std::size_t alignment>
+inline void write(void *memory, value_type value) {
+ write<value_type, alignment>(memory, value, endian);
+}
+
+template <typename value_type>
+using make_unsigned_t = typename std::make_unsigned<value_type>::type;
+
+/// Read a value of a particular endianness from memory, for a location
+/// that starts at the given bit offset within the first byte.
+template <typename value_type, endianness endian, std::size_t alignment>
+inline value_type readAtBitAlignment(const void *memory, uint64_t startBit) {
+ assert(startBit < 8);
+ if (startBit == 0)
+ return read<value_type, endian, alignment>(memory);
+ else {
+ // Read two values and compose the result from them.
+ value_type val[2];
+ memcpy(&val[0],
+ LLVM_ASSUME_ALIGNED(
+ memory, (detail::PickAlignment<value_type, alignment>::value)),
+ sizeof(value_type) * 2);
+ val[0] = byte_swap<value_type, endian>(val[0]);
+ val[1] = byte_swap<value_type, endian>(val[1]);
+
+ // Shift bits from the lower value into place.
+ make_unsigned_t<value_type> lowerVal = val[0] >> startBit;
+ // Mask off upper bits after right shift in case of signed type.
+ make_unsigned_t<value_type> numBitsFirstVal =
+ (sizeof(value_type) * 8) - startBit;
+ lowerVal &= ((make_unsigned_t<value_type>)1 << numBitsFirstVal) - 1;
+
+ // Get the bits from the upper value.
+ make_unsigned_t<value_type> upperVal =
+ val[1] & (((make_unsigned_t<value_type>)1 << startBit) - 1);
+ // Shift them in to place.
+ upperVal <<= numBitsFirstVal;
+
+ return lowerVal | upperVal;
+ }
+}
+
+/// Write a value to memory with a particular endianness, for a location
+/// that starts at the given bit offset within the first byte.
+template <typename value_type, endianness endian, std::size_t alignment>
+inline void writeAtBitAlignment(void *memory, value_type value,
+ uint64_t startBit) {
+ assert(startBit < 8);
+ if (startBit == 0)
+ write<value_type, endian, alignment>(memory, value);
+ else {
+ // Read two values and shift the result into them.
+ value_type val[2];
+ memcpy(&val[0],
+ LLVM_ASSUME_ALIGNED(
+ memory, (detail::PickAlignment<value_type, alignment>::value)),
+ sizeof(value_type) * 2);
+ val[0] = byte_swap<value_type, endian>(val[0]);
+ val[1] = byte_swap<value_type, endian>(val[1]);
+
+ // Mask off any existing bits in the upper part of the lower value that
+ // we want to replace.
+ val[0] &= ((make_unsigned_t<value_type>)1 << startBit) - 1;
+ make_unsigned_t<value_type> numBitsFirstVal =
+ (sizeof(value_type) * 8) - startBit;
+ make_unsigned_t<value_type> lowerVal = value;
+ if (startBit > 0) {
+ // Mask off the upper bits in the new value that are not going to go into
+ // the lower value. This avoids a left shift of a negative value, which
+ // is undefined behavior.
+ lowerVal &= (((make_unsigned_t<value_type>)1 << numBitsFirstVal) - 1);
+ // Now shift the new bits into place
+ lowerVal <<= startBit;
+ }
+ val[0] |= lowerVal;
+
+ // Mask off any existing bits in the lower part of the upper value that
+ // we want to replace.
+ val[1] &= ~(((make_unsigned_t<value_type>)1 << startBit) - 1);
+ // Next shift the bits that go into the upper value into position.
+ make_unsigned_t<value_type> upperVal = value >> numBitsFirstVal;
+ // Mask off upper bits after right shift in case of signed type.
+ upperVal &= ((make_unsigned_t<value_type>)1 << startBit) - 1;
+ val[1] |= upperVal;
+
+ // Finally, rewrite values.
+ val[0] = byte_swap<value_type, endian>(val[0]);
+ val[1] = byte_swap<value_type, endian>(val[1]);
+ memcpy(LLVM_ASSUME_ALIGNED(
+ memory, (detail::PickAlignment<value_type, alignment>::value)),
+ &val[0], sizeof(value_type) * 2);
+ }
+}
+
+} // end namespace endian
+
+namespace detail {
+
+template<typename value_type,
+ endianness endian,
+ std::size_t alignment>
+struct packed_endian_specific_integral {
+ packed_endian_specific_integral() = default;
+
+ explicit packed_endian_specific_integral(value_type val) { *this = val; }
+
+ operator value_type() const {
+ return endian::read<value_type, endian, alignment>(
+ (const void*)Value.buffer);
+ }
+
+ void operator=(value_type newValue) {
+ endian::write<value_type, endian, alignment>(
+ (void*)Value.buffer, newValue);
+ }
+
+ packed_endian_specific_integral &operator+=(value_type newValue) {
+ *this = *this + newValue;
+ return *this;
+ }
+
+ packed_endian_specific_integral &operator-=(value_type newValue) {
+ *this = *this - newValue;
+ return *this;
+ }
+
+ packed_endian_specific_integral &operator|=(value_type newValue) {
+ *this = *this | newValue;
+ return *this;
+ }
+
+ packed_endian_specific_integral &operator&=(value_type newValue) {
+ *this = *this & newValue;
+ return *this;
+ }
+
+private:
+ AlignedCharArray<PickAlignment<value_type, alignment>::value,
+ sizeof(value_type)> Value;
+
+public:
+ struct ref {
+ explicit ref(void *Ptr) : Ptr(Ptr) {}
+
+ operator value_type() const {
+ return endian::read<value_type, endian, alignment>(Ptr);
+ }
+
+ void operator=(value_type NewValue) {
+ endian::write<value_type, endian, alignment>(Ptr, NewValue);
+ }
+
+ private:
+ void *Ptr;
+ };
+};
+
+} // end namespace detail
+
+using ulittle16_t =
+ detail::packed_endian_specific_integral<uint16_t, little, unaligned>;
+using ulittle32_t =
+ detail::packed_endian_specific_integral<uint32_t, little, unaligned>;
+using ulittle64_t =
+ detail::packed_endian_specific_integral<uint64_t, little, unaligned>;
+
+using little16_t =
+ detail::packed_endian_specific_integral<int16_t, little, unaligned>;
+using little32_t =
+ detail::packed_endian_specific_integral<int32_t, little, unaligned>;
+using little64_t =
+ detail::packed_endian_specific_integral<int64_t, little, unaligned>;
+
+using aligned_ulittle16_t =
+ detail::packed_endian_specific_integral<uint16_t, little, aligned>;
+using aligned_ulittle32_t =
+ detail::packed_endian_specific_integral<uint32_t, little, aligned>;
+using aligned_ulittle64_t =
+ detail::packed_endian_specific_integral<uint64_t, little, aligned>;
+
+using aligned_little16_t =
+ detail::packed_endian_specific_integral<int16_t, little, aligned>;
+using aligned_little32_t =
+ detail::packed_endian_specific_integral<int32_t, little, aligned>;
+using aligned_little64_t =
+ detail::packed_endian_specific_integral<int64_t, little, aligned>;
+
+using ubig16_t =
+ detail::packed_endian_specific_integral<uint16_t, big, unaligned>;
+using ubig32_t =
+ detail::packed_endian_specific_integral<uint32_t, big, unaligned>;
+using ubig64_t =
+ detail::packed_endian_specific_integral<uint64_t, big, unaligned>;
+
+using big16_t =
+ detail::packed_endian_specific_integral<int16_t, big, unaligned>;
+using big32_t =
+ detail::packed_endian_specific_integral<int32_t, big, unaligned>;
+using big64_t =
+ detail::packed_endian_specific_integral<int64_t, big, unaligned>;
+
+using aligned_ubig16_t =
+ detail::packed_endian_specific_integral<uint16_t, big, aligned>;
+using aligned_ubig32_t =
+ detail::packed_endian_specific_integral<uint32_t, big, aligned>;
+using aligned_ubig64_t =
+ detail::packed_endian_specific_integral<uint64_t, big, aligned>;
+
+using aligned_big16_t =
+ detail::packed_endian_specific_integral<int16_t, big, aligned>;
+using aligned_big32_t =
+ detail::packed_endian_specific_integral<int32_t, big, aligned>;
+using aligned_big64_t =
+ detail::packed_endian_specific_integral<int64_t, big, aligned>;
+
+using unaligned_uint16_t =
+ detail::packed_endian_specific_integral<uint16_t, native, unaligned>;
+using unaligned_uint32_t =
+ detail::packed_endian_specific_integral<uint32_t, native, unaligned>;
+using unaligned_uint64_t =
+ detail::packed_endian_specific_integral<uint64_t, native, unaligned>;
+
+using unaligned_int16_t =
+ detail::packed_endian_specific_integral<int16_t, native, unaligned>;
+using unaligned_int32_t =
+ detail::packed_endian_specific_integral<int32_t, native, unaligned>;
+using unaligned_int64_t =
+ detail::packed_endian_specific_integral<int64_t, native, unaligned>;
+
+namespace endian {
+
+template <typename T> inline T read(const void *P, endianness E) {
+ return read<T, unaligned>(P, E);
+}
+
+template <typename T, endianness E> inline T read(const void *P) {
+ return *(const detail::packed_endian_specific_integral<T, E, unaligned> *)P;
+}
+
+inline uint16_t read16(const void *P, endianness E) {
+ return read<uint16_t>(P, E);
+}
+inline uint32_t read32(const void *P, endianness E) {
+ return read<uint32_t>(P, E);
+}
+inline uint64_t read64(const void *P, endianness E) {
+ return read<uint64_t>(P, E);
+}
+
+template <endianness E> inline uint16_t read16(const void *P) {
+ return read<uint16_t, E>(P);
+}
+template <endianness E> inline uint32_t read32(const void *P) {
+ return read<uint32_t, E>(P);
+}
+template <endianness E> inline uint64_t read64(const void *P) {
+ return read<uint64_t, E>(P);
+}
+
+inline uint16_t read16le(const void *P) { return read16<little>(P); }
+inline uint32_t read32le(const void *P) { return read32<little>(P); }
+inline uint64_t read64le(const void *P) { return read64<little>(P); }
+inline uint16_t read16be(const void *P) { return read16<big>(P); }
+inline uint32_t read32be(const void *P) { return read32<big>(P); }
+inline uint64_t read64be(const void *P) { return read64<big>(P); }
+
+template <typename T> inline void write(void *P, T V, endianness E) {
+ write<T, unaligned>(P, V, E);
+}
+
+template <typename T, endianness E> inline void write(void *P, T V) {
+ *(detail::packed_endian_specific_integral<T, E, unaligned> *)P = V;
+}
+
+inline void write16(void *P, uint16_t V, endianness E) {
+ write<uint16_t>(P, V, E);
+}
+inline void write32(void *P, uint32_t V, endianness E) {
+ write<uint32_t>(P, V, E);
+}
+inline void write64(void *P, uint64_t V, endianness E) {
+ write<uint64_t>(P, V, E);
+}
+
+template <endianness E> inline void write16(void *P, uint16_t V) {
+ write<uint16_t, E>(P, V);
+}
+template <endianness E> inline void write32(void *P, uint32_t V) {
+ write<uint32_t, E>(P, V);
+}
+template <endianness E> inline void write64(void *P, uint64_t V) {
+ write<uint64_t, E>(P, V);
+}
+
+inline void write16le(void *P, uint16_t V) { write16<little>(P, V); }
+inline void write32le(void *P, uint32_t V) { write32<little>(P, V); }
+inline void write64le(void *P, uint64_t V) { write64<little>(P, V); }
+inline void write16be(void *P, uint16_t V) { write16<big>(P, V); }
+inline void write32be(void *P, uint32_t V) { write32<big>(P, V); }
+inline void write64be(void *P, uint64_t V) { write64<big>(P, V); }
+
+} // end namespace endian
+
+} // end namespace support
+} // end namespace llvm
+
+#endif // LLVM_SUPPORT_ENDIAN_H