* include/ruby/intern.h (rb_exc_new2): optimization for literal.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23615 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Mon Jun  1 10:41:41 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* include/ruby/intern.h (rb_exc_new2): optimization for literal.
+
 Mon Jun  1 07:20:02 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* ext/bigdecimal/bigdecimal.c (BigDecimal_to_f): returns Inf if

error.c

@@ -348,6 +348,8 @@ VALUE rb_eSystemCallError;
 VALUE rb_mErrno;
 static VALUE rb_eNOERROR;
 
+#undef rb_exc_new2
+
 VALUE
 rb_exc_new(VALUE etype, const char *ptr, long len)
 {

include/ruby/intern.h

@@ -693,6 +693,12 @@ size_t rb_str_capacity(VALUE);
 	rb_str_cat(str, ptr, strlen(ptr)) :	\
 	rb_str_cat2(str, ptr);			\
 })
+#define rb_exc_new2(klass, ptr) __extension__ ( \
+{						\
+    (__builtin_constant_p(ptr)) ?	        \
+	rb_exc_new(klass, ptr, strlen(ptr)) :	\
+	rb_exc_new2(klass, ptr);		\
+})
 #endif
 #define rb_str_new2 rb_str_new_cstr
 #define rb_str_new3 rb_str_new_shared