diff options
-rw-r--r-- | ChangeLog | 5 | ||||
-rw-r--r-- | lib.c | 6 |
2 files changed, 10 insertions, 1 deletions
@@ -1,5 +1,10 @@ 2011-12-10 Kaz Kylheku <kaz@kylheku.com> + * lib.c (mulv): Recognize cases to eliminate a wasteful mul call + with an initial element of 1. + +2011-12-10 Kaz Kylheku <kaz@kylheku.com> + * lib.c (plusv): Recognize cases to eliminate a wasteful plus call with an initial element of zero. @@ -881,7 +881,11 @@ val mul(val anum, val bnum) val mulv(val nlist) { - return reduce_left(func_n2(mul), nlist, num(1), nil); + if (!nlist) + return num(1); + else if (!cdr(nlist)) + return car(nlist); + return reduce_left(func_n2(mul), cdr(nlist), car(nlist), nil); } val trunc(val anum, val bnum) |