numeric.c: short circuit

* numeric.c (int_pow): short circuit when y is 0, always return 1. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57270 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-01-05 07:27:19 +00:00 · 2017-01-05 07:27:19 +00:00 · f0f8234a26
commit f0f8234a26
parent 7ccae4d150
1 changed files with 1 additions and 0 deletions
--- a/numeric.c
+++ b/numeric.c
@ -3892,6 +3892,7 @@ int_pow(long x, unsigned long y)
    int neg = x < 0;
    long z = 1;

+    if (y == 0) return INT2FIX(1);
    if (neg) x = -x;
    if (y & 1)
 	z = x;