From 7da059bddbc3b230eef74ada37ee8ddc60ece9e4 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 15 Jul 2007 15:26:12 +0000
Subject: [PATCH] * bignum.c (rb_big_pow): removed invariant variable. 
 [ruby-dev:31236]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@12802 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog |  4 ++++
 bignum.c  | 18 +++---------------
 version.h |  6 +++---
 3 files changed, 10 insertions(+), 18 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index d3672f9856..26930f51a6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jul 16 00:26:10 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* bignum.c (rb_big_pow): removed invariant variable.  [ruby-dev:31236]
+
 Sun Jul 15 23:59:57 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* bignum.c (rb_big_neg): SIGNED_VALUE isn't in 1.8.
diff --git a/bignum.c b/bignum.c
index 788db18dd1..5763e8c72f 100644
--- a/bignum.c
+++ b/bignum.c
@@ -1754,7 +1754,7 @@ rb_big_pow(x, y)
 	yy = FIX2LONG(y);
 	if (yy > 0) {
 	    VALUE z = 0;
-	    long mask, n = 1;
+	    long mask;
 
 	    if (RBIGNUM(x)->len * SIZEOF_BDIGITS * yy > 1024*1024) {
 		rb_warn("in a**b, b may be too big");
@@ -1762,21 +1762,9 @@ rb_big_pow(x, y)
 		break;
 	    }
 	    for (mask = FIXNUM_MAX + 1; mask; mask >>= 1) {
-		if (!z) {
-		    long n2 = n * n;
-		    if (!POSFIXABLE(n2) || (n2 / n != n)) {
-			z = bigtrunc(bigsqr(rb_int2big(n)));
-		    }
-		    else {
-			n = n2;
-		    }
-		}
-		else {
-		    z = bigtrunc(bigsqr(z));
-		}
+		if (z) z = bigtrunc(bigsqr(z));
 		if (yy & mask) {
-		    if (!z) z = rb_int2big(n);
-		    z = bigtrunc(rb_big_mul0(z, x));
+		    z = z ? bigtrunc(rb_big_mul0(z, x)) : x;
 		}
 	    }
 	    return bignorm(z);
diff --git a/version.h b/version.h
index 4f97fe2f29..c176c8a573 100644
--- a/version.h
+++ b/version.h
@@ -1,7 +1,7 @@
 #define RUBY_VERSION "1.8.6"
-#define RUBY_RELEASE_DATE "2007-07-15"
+#define RUBY_RELEASE_DATE "2007-07-16"
 #define RUBY_VERSION_CODE 186
-#define RUBY_RELEASE_CODE 20070715
+#define RUBY_RELEASE_CODE 20070716
 #define RUBY_PATCHLEVEL 5000
 
 #define RUBY_VERSION_MAJOR 1
@@ -9,7 +9,7 @@
 #define RUBY_VERSION_TEENY 6
 #define RUBY_RELEASE_YEAR 2007
 #define RUBY_RELEASE_MONTH 7
-#define RUBY_RELEASE_DAY 15
+#define RUBY_RELEASE_DAY 16
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];