nobu	2016-03-06 17:34:50 +0900 (Sun, 06 Mar 2016)

  New Revision: 54007

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=54007

  Log:
    eval_error.c: trivial optimization
    
    * eval_error.c (warn_print): optimize warn_print with a string
      literal, with rb_write_error2 instead of rb_write_error.

  Modified files:
    trunk/eval_error.c
Index: eval_error.c
===================================================================
--- eval_error.c	(revision 54006)
+++ eval_error.c	(revision 54007)
@@ -3,7 +3,16 @@ https://github.com/ruby/ruby/blob/trunk/eval_error.c#L3
  * included by eval.c
  */
 
+#if defined(__GNUC__) && !defined(__PCC__)
+#define warn_print(x) __extension__ (	\
+{						\
+    (__builtin_constant_p(x)) ? 		\
+	rb_write_error2((x), (long)strlen(x)) : \
+	rb_write_error(x);			\
+})
+#else
 #define warn_print(x) rb_write_error(x)
+#endif
 #define warn_print2(x,l) rb_write_error2((x),(l))
 #define warn_print_str(x) rb_write_error_str(x)
 

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