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9189a26664
Initial platform support for COFF/x86_64. Completed features: * Statically linked orc runtime. * Full linking/initialization of static/dynamic vc runtimes and microsoft stl libraries. * SEH exception handling. * Full static initializers support * dlfns * JIT side symbol lookup/dispatch Things to note: * It uses vc runtime libraries found in vc toolchain installations. * Bootstrapping state is separated because when statically linking orc runtime it needs microsoft stl functions to initialize the orc runtime, but static initializers need to be ran in order to fully initialize stl libraries. * Process symbols can't be used blidnly on msvc platform; otherwise duplicate definition error gets generated. If process symbols are used, it's destined to get out-of-reach error at some point. * Atexit currently not handled -- will be handled in the follow-up patches. Reviewed By: lhames Differential Revision: https://reviews.llvm.org/D130479
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
//===--------- compiler.h - Compiler abstraction support --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of the ORC runtime support library.
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//
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// Most functionality in this file was swiped from llvm/Support/Compiler.h.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ORC_RT_COMPILER_H
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#define ORC_RT_COMPILER_H
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#if defined(_WIN32)
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#define ORC_RT_INTERFACE extern "C"
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#define ORC_RT_HIDDEN
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#define ORC_RT_IMPORT extern "C" __declspec(dllimport)
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#else
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#define ORC_RT_INTERFACE extern "C" __attribute__((visibility("default")))
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#define ORC_RT_HIDDEN __attribute__((visibility("hidden")))
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#define ORC_RT_IMPORT extern "C"
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#endif
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#ifndef __has_builtin
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# define __has_builtin(x) 0
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#endif
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// Only use __has_cpp_attribute in C++ mode. GCC defines __has_cpp_attribute in
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// C mode, but the :: in __has_cpp_attribute(scoped::attribute) is invalid.
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#ifndef ORC_RT_HAS_CPP_ATTRIBUTE
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#if defined(__cplusplus) && defined(__has_cpp_attribute)
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#define ORC_RT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
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#else
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#define ORC_RT_HAS_CPP_ATTRIBUTE(x) 0
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#endif
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#endif
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// Use the 'nodiscard' attribute in C++17 or newer mode.
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#if defined(__cplusplus) && __cplusplus > 201402L && \
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ORC_RT_HAS_CPP_ATTRIBUTE(nodiscard)
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#define ORC_RT_NODISCARD [[nodiscard]]
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#elif ORC_RT_HAS_CPP_ATTRIBUTE(clang::warn_unused_result)
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#define ORC_RT_NODISCARD [[clang::warn_unused_result]]
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// Clang in C++14 mode claims that it has the 'nodiscard' attribute, but also
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// warns in the pedantic mode that 'nodiscard' is a C++17 extension (PR33518).
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// Use the 'nodiscard' attribute in C++14 mode only with GCC.
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// TODO: remove this workaround when PR33518 is resolved.
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#elif defined(__GNUC__) && ORC_RT_HAS_CPP_ATTRIBUTE(nodiscard)
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#define ORC_RT_NODISCARD [[nodiscard]]
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#else
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#define ORC_RT_NODISCARD
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#endif
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#if __has_builtin(__builtin_expect)
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#define ORC_RT_LIKELY(EXPR) __builtin_expect((bool)(EXPR), true)
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#define ORC_RT_UNLIKELY(EXPR) __builtin_expect((bool)(EXPR), false)
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#else
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#define ORC_RT_LIKELY(EXPR) (EXPR)
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#define ORC_RT_UNLIKELY(EXPR) (EXPR)
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#endif
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#if defined(__APPLE__)
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#define ORC_RT_WEAK_IMPORT __attribute__((weak_import))
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#elif defined(_WIN32)
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#define ORC_RT_WEAK_IMPORT
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#else
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#define ORC_RT_WEAK_IMPORT __attribute__((weak))
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#endif
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#endif // ORC_RT_COMPILER_H
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