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Move Compiler.h from Demangle back to Support

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Code review feedback from r328123 prefers copying the few feature test
macros used by Demangle into there, rather than sinking the header into
an odd corner like Demangle.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333965 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie
2018-06-04 22:53:38 +00:00
parent 3bc04090d3
commit 475e530121
3 changed files with 564 additions and 515 deletions
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lib/Demangle/ItaniumDemangle.cpp
+70 -2
View File
@@ -13,8 +13,6 @@
#include "llvm/Demangle/Demangle.h"
#include "llvm/Demangle/Compiler.h"
#include <algorithm>
#include <cassert>
#include <cctype>
@@ -31,6 +29,76 @@
#endif
#endif
// A variety of feature test macros copied from include/llvm/Support/Compiler.h
#ifndef __has_feature
#define __has_feature(x) 0
#endif
#ifndef __has_cpp_attribute
#define __has_cpp_attribute(x) 0
#endif
#ifndef __has_attribute
#define __has_attribute(x) 0
#endif
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
#ifndef LLVM_GNUC_PREREQ
#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
#define LLVM_GNUC_PREREQ(maj, min, patch) \
((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \
((maj) << 20) + ((min) << 10) + (patch))
#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
#define LLVM_GNUC_PREREQ(maj, min, patch) \
((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10))
#else
#define LLVM_GNUC_PREREQ(maj, min, patch) 0
#endif
#endif
#if __has_attribute(used) || LLVM_GNUC_PREREQ(3, 1, 0)
#define LLVM_ATTRIBUTE_USED __attribute__((__used__))
#else
#define LLVM_ATTRIBUTE_USED
#endif
#if __has_builtin(__builtin_unreachable) || LLVM_GNUC_PREREQ(4, 5, 0)
#define LLVM_BUILTIN_UNREACHABLE __builtin_unreachable()
#elif defined(_MSC_VER)
#define LLVM_BUILTIN_UNREACHABLE __assume(false)
#endif
#if __has_attribute(noinline) || LLVM_GNUC_PREREQ(3, 4, 0)
#define LLVM_ATTRIBUTE_NOINLINE __attribute__((noinline))
#elif defined(_MSC_VER)
#define LLVM_ATTRIBUTE_NOINLINE __declspec(noinline)
#else
#define LLVM_ATTRIBUTE_NOINLINE
#endif
#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
#define LLVM_DUMP_METHOD LLVM_ATTRIBUTE_NOINLINE LLVM_ATTRIBUTE_USED
#else
#define LLVM_DUMP_METHOD LLVM_ATTRIBUTE_NOINLINE
#endif
#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
#define LLVM_FALLTHROUGH [[fallthrough]]
#elif __has_cpp_attribute(gnu::fallthrough)
#define LLVM_FALLTHROUGH [[gnu::fallthrough]]
#elif !__cplusplus
// Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious
// error when __has_cpp_attribute is given a scoped attribute in C mode.
#define LLVM_FALLTHROUGH
#elif __has_cpp_attribute(clang::fallthrough)
#define LLVM_FALLTHROUGH [[clang::fallthrough]]
#else
#define LLVM_FALLTHROUGH
#endif
namespace {
class StringView {