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numeric.c: short circuit

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* 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
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nobu 2017-01-05 07:27:19 +00:00
parent 7ccae4d150
commit f0f8234a26
1 changed files with 1 additions and 0 deletions
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numeric.c
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@ -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;