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Update LLVM to latest upstream. (#1080)

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Also change header guards to WPI header guards.
Remove StringRef::c_str() customization, replacing the handful of uses with Twine or SmallString.
TCPStream: Include errno.h and make Windows includes lowercase for consistency.

Upstream LLVM version: eb4186cca7924fb1706357545311a2fa3de40c59
This commit is contained in:
Peter Johnson
2018-05-22 23:31:08 -07:00
committed by GitHub
parent 680aabbe7c
commit a2ecb1027a
62 changed files with 5956 additions and 2522 deletions
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133
wpiutil/src/main/native/include/wpi/AlignOf.h
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@@ -7,110 +7,24 @@
//
//===----------------------------------------------------------------------===//
//
// This file defines the AlignOf function that computes alignments for
// arbitrary types.
// This file defines the AlignedCharArray and AlignedCharArrayUnion classes.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_ALIGNOF_H
#define LLVM_SUPPORT_ALIGNOF_H
#ifndef WPIUTIL_WPI_ALIGNOF_H
#define WPIUTIL_WPI_ALIGNOF_H
#include "wpi/Compiler.h"
#include <cstddef>
#include <type_traits>
namespace wpi {
namespace detail {
// For everything other than an abstract class we can calulate alignment by
// building a class with a single character and a member of the given type.
template <typename T, bool = std::is_abstract<T>::value>
struct AlignmentCalcImpl {
char x;
#if defined(_MSC_VER)
// Disables "structure was padded due to __declspec(align())" warnings that are
// generated by any class using AlignOf<T> with a manually specified alignment.
// Although the warning is disabled in the LLVM project we need this pragma
// as AlignOf.h is a published support header that's available for use
// out-of-tree, and we would like that to compile cleanly at /W4.
#pragma warning(suppress : 4324)
#endif
T t;
private:
AlignmentCalcImpl() = delete;
};
// Abstract base class helper, this will have the minimal alignment and size
// for any abstract class. We don't even define its destructor because this
// type should never be used in a way that requires it.
struct AlignmentCalcImplBase {
virtual ~AlignmentCalcImplBase() = 0;
};
// When we have an abstract class type, specialize the alignment computation
// engine to create another abstract class that derives from both an empty
// abstract base class and the provided type. This has the same effect as the
// above except that it handles the fact that we can't actually create a member
// of type T.
template <typename T>
struct AlignmentCalcImpl<T, true> : AlignmentCalcImplBase, T {
~AlignmentCalcImpl() override = 0;
};
} // End detail namespace.
/// AlignOf - A templated class that contains an enum value representing
/// the alignment of the template argument. For example,
/// AlignOf<int>::Alignment represents the alignment of type "int". The
/// alignment calculated is the minimum alignment, and not necessarily
/// the "desired" alignment returned by GCC's __alignof__ (for example). Note
/// that because the alignment is an enum value, it can be used as a
/// compile-time constant (e.g., for template instantiation).
template <typename T>
struct AlignOf {
#ifndef _MSC_VER
// Avoid warnings from GCC like:
// comparison between 'enum wpi::AlignOf<X>::<anonymous>' and 'enum
// wpi::AlignOf<Y>::<anonymous>' [-Wenum-compare]
// by using constexpr instead of enum.
// (except on MSVC, since it doesn't support constexpr yet).
static constexpr unsigned Alignment = static_cast<unsigned int>(
sizeof(detail::AlignmentCalcImpl<T>) - sizeof(T));
#else
enum {
Alignment = static_cast<unsigned int>(
sizeof(::wpi::detail::AlignmentCalcImpl<T>) - sizeof(T))
};
#endif
enum { Alignment_GreaterEqual_2Bytes = Alignment >= 2 ? 1 : 0 };
enum { Alignment_GreaterEqual_4Bytes = Alignment >= 4 ? 1 : 0 };
enum { Alignment_GreaterEqual_8Bytes = Alignment >= 8 ? 1 : 0 };
enum { Alignment_GreaterEqual_16Bytes = Alignment >= 16 ? 1 : 0 };
enum { Alignment_LessEqual_2Bytes = Alignment <= 2 ? 1 : 0 };
enum { Alignment_LessEqual_4Bytes = Alignment <= 4 ? 1 : 0 };
enum { Alignment_LessEqual_8Bytes = Alignment <= 8 ? 1 : 0 };
enum { Alignment_LessEqual_16Bytes = Alignment <= 16 ? 1 : 0 };
};
#ifndef _MSC_VER
template <typename T> constexpr unsigned AlignOf<T>::Alignment;
#endif
/// alignOf - A templated function that returns the minimum alignment of
/// of a type. This provides no extra functionality beyond the AlignOf
/// class besides some cosmetic cleanliness. Example usage:
/// alignOf<int>() returns the alignment of an int.
template <typename T>
inline unsigned alignOf() { return AlignOf<T>::Alignment; }
/// \struct AlignedCharArray
/// \brief Helper for building an aligned character array type.
/// Helper for building an aligned character array type.
///
/// This template is used to explicitly build up a collection of aligned
/// character array types. We have to build these up using a macro and explicit
/// specialization to cope with old versions of MSVC and GCC where only an
/// specialization to cope with MSVC (at least till 2015) where only an
/// integer literal can be used to specify an alignment constraint. Once built
/// up here, we can then begin to indirect between these using normal C++
/// template parameters.
@@ -118,41 +32,14 @@ inline unsigned alignOf() { return AlignOf<T>::Alignment; }
// MSVC requires special handling here.
#ifndef _MSC_VER
#if __has_feature(cxx_alignas)
template<std::size_t Alignment, std::size_t Size>
struct AlignedCharArray {
alignas(Alignment) char buffer[Size];
LLVM_ALIGNAS(Alignment) char buffer[Size];
};
#elif defined(__GNUC__) || defined(__IBM_ATTRIBUTES)
/// \brief Create a type with an aligned char buffer.
template<std::size_t Alignment, std::size_t Size>
struct AlignedCharArray;
#define LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(x) \
template<std::size_t Size> \
struct AlignedCharArray<x, Size> { \
__attribute__((aligned(x))) char buffer[Size]; \
};
LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(1)
LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(2)
LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(4)
LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(8)
LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(16)
LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(32)
LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(64)
LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT(128)
#undef LLVM_ALIGNEDCHARARRAY_TEMPLATE_ALIGNMENT
#else
# error No supported align as directive.
#endif
#else // _MSC_VER
/// \brief Create a type with an aligned char buffer.
/// Create a type with an aligned char buffer.
template<std::size_t Alignment, std::size_t Size>
struct AlignedCharArray;
@@ -237,7 +124,7 @@ union SizerImpl {
};
} // end namespace detail
/// \brief This union template exposes a suitably aligned and sized character
/// This union template exposes a suitably aligned and sized character
/// array member which can hold elements of any of up to ten types.
///
/// These types may be arrays, structs, or any other types. The goal is to
@@ -249,8 +136,8 @@ template <typename T1,
typename T5 = char, typename T6 = char, typename T7 = char,
typename T8 = char, typename T9 = char, typename T10 = char>
struct AlignedCharArrayUnion : wpi::AlignedCharArray<
AlignOf<wpi::detail::AlignerImpl<T1, T2, T3, T4, T5,
T6, T7, T8, T9, T10> >::Alignment,
alignof(wpi::detail::AlignerImpl<T1, T2, T3, T4, T5,
T6, T7, T8, T9, T10>),
sizeof(::wpi::detail::SizerImpl<T1, T2, T3, T4, T5,
T6, T7, T8, T9, T10>)> {
};