nobu	2015-07-22 20:27:46 +0900 (Wed, 22 Jul 2015)

  New Revision: 51342

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=51342

  Log:
    ruby.h: ASSUME
    
    * include/ruby/ruby.h (ASSUME): hint for optimization, the
      expression is assumed to be true always.

  Modified files:
    trunk/include/ruby/ruby.h
    trunk/win32/Makefile.sub
Index: include/ruby/ruby.h
===================================================================
--- include/ruby/ruby.h	(revision 51341)
+++ include/ruby/ruby.h	(revision 51342)
@@ -41,8 +41,15 @@ extern "C" { https://github.com/ruby/ruby/blob/trunk/include/ruby/ruby.h#L41
 #ifndef NOINLINE
 # define NOINLINE(x) x
 #endif
+#ifndef ASSUME
+# ifdef UNREACHABLE
+#   define ASSUME(x) (LIKELY(!!(x)) ? (void)0 : UNREACHABLE)
+# else
+#   define ASSUME(x) ((void)0)
+# endif
+#endif
 #ifndef UNREACHABLE
-# define UNREACHABLE		/* unreachable */
+# define UNREACHABLE ((void)0)	/* unreachable */
 #endif
 
 #ifdef __GNUC__
Index: win32/Makefile.sub
===================================================================
--- win32/Makefile.sub	(revision 51341)
+++ win32/Makefile.sub	(revision 51342)
@@ -587,6 +587,7 @@ $(CONFIG_H): $(MKFILES) $(srcdir)/win32/ https://github.com/ruby/ruby/blob/trunk/win32/Makefile.sub#L587
 #define NOINLINE(x) __declspec(noinline) x
 !endif
 #define UNREACHABLE __assume(0)
+#define ASSUME(x) __assume(!!(x))
 #define FUNC_STDCALL(x) __stdcall x
 #define FUNC_CDECL(x) __cdecl x
 #define FUNC_FASTCALL(x) __fastcall x

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