#ifndef LLVM_SUPPORT_COMPILER_H
#define LLVM_SUPPORT_COMPILER_H
-#include "llvm/Config/config.h"
+#include "llvm/Config/llvm-config.h"
#ifndef __has_feature
# define __has_feature(x) 0
#endif
+#ifndef __has_attribute
+# define __has_attribute(x) 0
+#endif
+
+#ifndef __has_builtin
+# define __has_builtin(x) 0
+#endif
+
+/// \macro __GNUC_PREREQ
+/// \brief Defines __GNUC_PREREQ if glibc's features.h isn't available.
+#ifndef __GNUC_PREREQ
+# if defined(__GNUC__) && defined(__GNUC_MINOR__)
+# define __GNUC_PREREQ(maj, min) \
+ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+# else
+# define __GNUC_PREREQ(maj, min) 0
+# endif
+#endif
+
+/// \macro LLVM_MSC_PREREQ
+/// \brief Is the compiler MSVC of at least the specified version?
+/// The common \param version values to check for are:
+/// * 1600: Microsoft Visual Studio 2010
+/// * 1700: Microsoft Visual Studio 2012
+/// * 1800: Microsoft Visual Studio 2013
+#define LLVM_MSC_PREREQ(version) \
+ (defined(_MSC_VER) && _MSC_VER >= (version))
+
/// \brief Does the compiler support r-value references?
/// This implies that <utility> provides the one-argument std::move; it
/// does not imply the existence of any other C++ library features.
-#if (__has_feature(cxx_rvalue_references) \
- || defined(__GXX_EXPERIMENTAL_CXX0X__) \
- || (defined(_MSC_VER) && _MSC_VER >= 1600))
+#if __has_feature(cxx_rvalue_references) || \
+ defined(__GXX_EXPERIMENTAL_CXX0X__) || LLVM_MSC_PREREQ(1600)
#define LLVM_HAS_RVALUE_REFERENCES 1
#else
#define LLVM_HAS_RVALUE_REFERENCES 0
/// * {true,false}_type
/// * is_constructible
/// * etc...
-#if defined(__GXX_EXPERIMENTAL_CXX0X__) \
- || (defined(_MSC_VER) && _MSC_VER >= 1700)
+#if defined(__GXX_EXPERIMENTAL_CXX0X__) || LLVM_MSC_PREREQ(1700)
#define LLVM_HAS_CXX11_TYPETRAITS 1
#else
#define LLVM_HAS_CXX11_TYPETRAITS 0
/// \brief Does the compiler have the C++11 standard library.
///
/// Implies LLVM_HAS_RVALUE_REFERENCES, LLVM_HAS_CXX11_TYPETRAITS
-#if defined(__GXX_EXPERIMENTAL_CXX0X__) \
- || (defined(_MSC_VER) && _MSC_VER >= 1700)
+#if defined(__GXX_EXPERIMENTAL_CXX0X__) || LLVM_MSC_PREREQ(1700)
#define LLVM_HAS_CXX11_STDLIB 1
#else
#define LLVM_HAS_CXX11_STDLIB 0
#endif
+/// \macro LLVM_HAS_VARIADIC_TEMPLATES
+/// \brief Does this compiler support variadic templates.
+///
+/// Implies LLVM_HAS_RVALUE_REFERENCES and the existence of std::forward.
+#if __has_feature(cxx_variadic_templates)
+# define LLVM_HAS_VARIADIC_TEMPLATES 1
+#else
+# define LLVM_HAS_VARIADIC_TEMPLATES 0
+#endif
+
/// llvm_move - Expands to ::std::move if the compiler supports
/// r-value references; otherwise, expands to the argument.
#if LLVM_HAS_RVALUE_REFERENCES
/// LLVM_FINAL - Expands to 'final' if the compiler supports it.
/// Use to mark classes or virtual methods as final.
-#if __has_feature(cxx_override_control) \
- || (defined(_MSC_VER) && _MSC_VER >= 1700)
+#if __has_feature(cxx_override_control) || LLVM_MSC_PREREQ(1700)
#define LLVM_FINAL final
#else
#define LLVM_FINAL
/// LLVM_OVERRIDE - Expands to 'override' if the compiler supports it.
/// Use to mark virtual methods as overriding a base class method.
-#if __has_feature(cxx_override_control) \
- || (defined(_MSC_VER) && _MSC_VER >= 1700)
+#if __has_feature(cxx_override_control) || LLVM_MSC_PREREQ(1700)
#define LLVM_OVERRIDE override
#else
#define LLVM_OVERRIDE
/// into a shared library, then the class should be private to the library and
/// not accessible from outside it. Can also be used to mark variables and
/// functions, making them private to any shared library they are linked into.
-#if (__GNUC__ >= 4) && !defined(__MINGW32__) && !defined(__CYGWIN__)
+/// On PE/COFF targets, library visibility is the default, so this isn't needed.
+#if (__has_attribute(visibility) || __GNUC_PREREQ(4, 0)) && \
+ !defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(LLVM_ON_WIN32)
#define LLVM_LIBRARY_VISIBILITY __attribute__ ((visibility("hidden")))
#else
#define LLVM_LIBRARY_VISIBILITY
#endif
-#if (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
+#if __has_attribute(used) || __GNUC_PREREQ(3, 1)
#define LLVM_ATTRIBUTE_USED __attribute__((__used__))
#else
#define LLVM_ATTRIBUTE_USED
#endif
+#if __has_attribute(warn_unused_result) || __GNUC_PREREQ(3, 4)
+#define LLVM_ATTRIBUTE_UNUSED_RESULT __attribute__((__warn_unused_result__))
+#else
+#define LLVM_ATTRIBUTE_UNUSED_RESULT
+#endif
+
// Some compilers warn about unused functions. When a function is sometimes
// used or not depending on build settings (e.g. a function only called from
// within "assert"), this attribute can be used to suppress such warnings.
// more portable solution:
// (void)unused_var_name;
// Prefer cast-to-void wherever it is sufficient.
-#if (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
+#if __has_attribute(unused) || __GNUC_PREREQ(3, 1)
#define LLVM_ATTRIBUTE_UNUSED __attribute__((__unused__))
#else
#define LLVM_ATTRIBUTE_UNUSED
#endif
-#if (__GNUC__ >= 4) && !defined(__MINGW32__) && !defined(__CYGWIN__)
+// FIXME: Provide this for PE/COFF targets.
+#if (__has_attribute(weak) || __GNUC_PREREQ(4, 0)) && \
+ (!defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(LLVM_ON_WIN32))
#define LLVM_ATTRIBUTE_WEAK __attribute__((__weak__))
#else
#define LLVM_ATTRIBUTE_WEAK
#endif
-#ifdef __GNUC__ // aka 'CONST' but following LLVM Conventions.
+// Prior to clang 3.2, clang did not accept any spelling of
+// __has_attribute(const), so assume it is supported.
+#if defined(__clang__) || defined(__GNUC__)
+// aka 'CONST' but following LLVM Conventions.
#define LLVM_READNONE __attribute__((__const__))
#else
#define LLVM_READNONE
#endif
-#ifdef __GNUC__ // aka 'PURE' but following LLVM Conventions.
+#if __has_attribute(pure) || defined(__GNUC__)
+// aka 'PURE' but following LLVM Conventions.
#define LLVM_READONLY __attribute__((__pure__))
#else
#define LLVM_READONLY
#endif
-#if (__GNUC__ >= 4)
+#if __has_builtin(__builtin_expect) || __GNUC_PREREQ(4, 0)
#define LLVM_LIKELY(EXPR) __builtin_expect((bool)(EXPR), true)
#define LLVM_UNLIKELY(EXPR) __builtin_expect((bool)(EXPR), false)
#else
/// LLVM_ATTRIBUTE_NOINLINE - On compilers where we have a directive to do so,
/// mark a method "not for inlining".
-#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
+#if __has_attribute(noinline) || __GNUC_PREREQ(3, 4)
#define LLVM_ATTRIBUTE_NOINLINE __attribute__((noinline))
#elif defined(_MSC_VER)
#define LLVM_ATTRIBUTE_NOINLINE __declspec(noinline)
/// so, mark a method "always inline" because it is performance sensitive. GCC
/// 3.4 supported this but is buggy in various cases and produces unimplemented
/// errors, just use it in GCC 4.0 and later.
-#if __GNUC__ > 3
+#if __has_attribute(always_inline) || __GNUC_PREREQ(4, 0)
#define LLVM_ATTRIBUTE_ALWAYS_INLINE inline __attribute__((always_inline))
#elif defined(_MSC_VER)
#define LLVM_ATTRIBUTE_ALWAYS_INLINE __forceinline
/// LLVM_BUILTIN_UNREACHABLE - On compilers which support it, expands
/// to an expression which states that it is undefined behavior for the
/// compiler to reach this point. Otherwise is not defined.
-#if defined(__clang__) || (__GNUC__ > 4) \
- || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+#if __has_builtin(__builtin_unreachable) || __GNUC_PREREQ(4, 5)
# define LLVM_BUILTIN_UNREACHABLE __builtin_unreachable()
#elif defined(_MSC_VER)
# define LLVM_BUILTIN_UNREACHABLE __assume(false)
/// LLVM_BUILTIN_TRAP - On compilers which support it, expands to an expression
/// which causes the program to exit abnormally.
-#if defined(__clang__) || (__GNUC__ > 4) \
- || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
+#if __has_builtin(__builtin_trap) || __GNUC_PREREQ(4, 3)
# define LLVM_BUILTIN_TRAP __builtin_trap()
#else
# define LLVM_BUILTIN_TRAP *(volatile int*)0x11 = 0
/// \macro LLVM_ASSUME_ALIGNED
/// \brief Returns a pointer with an assumed alignment.
-#if !defined(__clang__) && ((__GNUC__ > 4) \
- || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
-// FIXME: Enable on clang when it supports it.
+#if __has_builtin(__builtin_assume_aligned) && __GNUC_PREREQ(4, 7)
# define LLVM_ASSUME_ALIGNED(p, a) __builtin_assume_aligned(p, a)
#elif defined(LLVM_BUILTIN_UNREACHABLE)
+// As of today, clang does not support __builtin_assume_aligned.
# define LLVM_ASSUME_ALIGNED(p, a) \
(((uintptr_t(p) % (a)) == 0) ? (p) : (LLVM_BUILTIN_UNREACHABLE, (p)))
#else
# define LLVM_FUNCTION_NAME __func__
#endif
-/// \macro LLVM_ENABLE_MSAN_ANNOTATIONS
-/// \brief Are MemorySanitizer annotations available.
#if defined(HAVE_SANITIZER_MSAN_INTERFACE_H)
# include <sanitizer/msan_interface.h>
#else
# define __msan_allocated_memory(p, size)
+# define __msan_unpoison(p, size)
#endif
/// \macro LLVM_MEMORY_SANITIZER_BUILD
# define LLVM_MEMORY_SANITIZER_BUILD 0
#endif
+/// \macro LLVM_ADDRESS_SANITIZER_BUILD
+/// \brief Whether LLVM itself is built with AddressSanitizer instrumentation.
+#if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
+# define LLVM_ADDRESS_SANITIZER_BUILD 1
+#else
+# define LLVM_ADDRESS_SANITIZER_BUILD 0
+#endif
+
+/// \macro LLVM_IS_UNALIGNED_ACCESS_FAST
+/// \brief Is unaligned memory access fast on the host machine.
+///
+/// Don't specialize on alignment for platforms where unaligned memory accesses
+/// generates the same code as aligned memory accesses for common types.
+#if defined(_M_AMD64) || defined(_M_IX86) || defined(__amd64) || \
+ defined(__amd64__) || defined(__x86_64) || defined(__x86_64__) || \
+ defined(_X86_) || defined(__i386) || defined(__i386__)
+# define LLVM_IS_UNALIGNED_ACCESS_FAST 1
+#else
+# define LLVM_IS_UNALIGNED_ACCESS_FAST 0
+#endif
+
+/// \macro LLVM_EXPLICIT
+/// \brief Expands to explicit on compilers which support explicit conversion
+/// operators. Otherwise expands to nothing.
+#if (__has_feature(cxx_explicit_conversions) \
+ || defined(__GXX_EXPERIMENTAL_CXX0X__))
+#define LLVM_EXPLICIT explicit
+#else
+#define LLVM_EXPLICIT
+#endif
+
+/// \macro LLVM_STATIC_ASSERT
+/// \brief Expands to C/C++'s static_assert on compilers which support it.
+#if __has_feature(cxx_static_assert)
+# define LLVM_STATIC_ASSERT(expr, msg) static_assert(expr, msg)
+#elif __has_feature(c_static_assert)
+# define LLVM_STATIC_ASSERT(expr, msg) _Static_assert(expr, msg)
+#else
+# define LLVM_STATIC_ASSERT(expr, msg)
+#endif
+
+/// \macro LLVM_ENUM_INT_TYPE
+/// \brief Expands to colon followed by the given integral type on compilers
+/// which support C++11 strong enums. This can be used to make enums unsigned
+/// with MSVC.
+#if __has_feature(cxx_strong_enums) || LLVM_MSC_PREREQ(1600)
+# define LLVM_ENUM_INT_TYPE(intty) : intty
+#else
+# define LLVM_ENUM_INT_TYPE(intty)
+#endif
+
+/// \brief Does the compiler support C++11 semantics for strongly typed forward
+/// declared enums?
+#if __has_feature(cxx_strong_enums) || LLVM_MSC_PREREQ(1700)
+#define LLVM_HAS_STRONG_ENUMS 1
+#else
+#define LLVM_HAS_STRONG_ENUMS 0
+#endif
+
+/// \brief Does the compiler support generalized initializers (using braced
+/// lists and std::initializer_list). While clang may claim it supports general
+/// initializers, if we're using MSVC's headers, we might not have a usable
+/// std::initializer list type from the STL. Disable this for now.
+#if __has_feature(cxx_generalized_initializers) && !defined(_MSC_VER)
+#define LLVM_HAS_INITIALIZER_LISTS 1
+#else
+#define LLVM_HAS_INITIALIZER_LISTS 0
+#endif
+
#endif
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