Give NamedRegionTimer an Enabled flag, allowing all its clients to

[oota-llvm.git] / include / llvm / Support / Compiler.h

diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h
index 046033fb9e424a4dc72b60a1eb4d5a61056a7f0b..b2ce76d285ef76489f88247fe5bd1c6b68894a93 100644 (file)
--- a/include/llvm/Support/Compiler.h
+++ b/include/llvm/Support/Compiler.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -15,14 +15,52 @@
 #ifndef LLVM_SUPPORT_COMPILER_H
 #define LLVM_SUPPORT_COMPILER_H
 
-// The VISIBILITY_HIDDEN macro, used for marking classes with the GCC-specific
-// visibility("hidden") attribute.
-#if __GNUC__ >= 4
-#define VISIBILITY_HIDDEN __attribute__ ((visibility("hidden")))
+/// LLVM_LIBRARY_VISIBILITY - If a class marked with this attribute is linked
+/// 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.
+
+/// LLVM_GLOBAL_VISIBILITY - If a class marked with this attribute is linked
+/// into a shared library, then the class will be accessible from outside the
+/// the library.  Can also be used to mark variables and functions, making them
+/// accessible from outside any shared library they are linked into.
+#if (__GNUC__ >= 4) && !defined(__MINGW32__) && !defined(__CYGWIN__)
+#define LLVM_LIBRARY_VISIBILITY __attribute__ ((visibility("hidden")))
+#define LLVM_GLOBAL_VISIBILITY __attribute__ ((visibility("default")))
+#else
+#define LLVM_LIBRARY_VISIBILITY
+#define LLVM_GLOBAL_VISIBILITY
+#endif
+
+#if (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
+#define ATTRIBUTE_USED __attribute__((__used__))
+#else
+#define ATTRIBUTE_USED
+#endif
+
+#if (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
+#define ATTRIBUTE_UNUSED __attribute__((__unused__))
+#else
+#define ATTRIBUTE_UNUSED
+#endif
+
+#ifdef __GNUC__ // aka 'ATTRIBUTE_CONST' but following LLVM Conventions.
+#define ATTRIBUTE_READNONE __attribute__((__const__))
+#else
+#define ATTRIBUTE_READNONE
+#endif
+
+#ifdef __GNUC__  // aka 'ATTRIBUTE_PURE' but following LLVM Conventions.
+#define ATTRIBUTE_READONLY __attribute__((__pure__))
 #else
-#define VISIBILITY_HIDDEN
+#define ATTRIBUTE_READONLY
 #endif
 
+#if (__GNUC__ >= 4)
+#define BUILTIN_EXPECT(EXPR, VALUE) __builtin_expect((EXPR), (VALUE))
+#else
+#define BUILTIN_EXPECT(EXPR, VALUE) (EXPR)
+#endif
 
 // C++ doesn't support 'extern template' of template specializations.  GCC does,
 // but requires __extension__ before it.  In the header, use this:
@@ -37,4 +75,34 @@
 #define TEMPLATE_INSTANTIATION(X)
 #endif
 
+// DISABLE_INLINE - On compilers where we have a directive to do so, mark a
+// method "not for inlining".
+#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
+#define DISABLE_INLINE __attribute__((noinline))
+#elif defined(_MSC_VER)
+#define DISABLE_INLINE __declspec(noinline)
+#else
+#define DISABLE_INLINE
+#endif
+
+// ALWAYS_INLINE - On compilers where we have a directive to do 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
+#define ALWAYS_INLINE __attribute__((always_inline))
+#else
+// TODO: No idea how to do this with MSVC.
+#define ALWAYS_INLINE
+#endif
+
+
+#ifdef __GNUC__
+#define NORETURN __attribute__((noreturn))
+#elif defined(_MSC_VER)
+#define NORETURN __declspec(noreturn)
+#else
+#define NORETURN
+#endif
+
 #endif