Define size more explicitly, helping the compiler

[Keno]

No description provided.

[coveralls]

Coverage decreased (-0.02%) to 69.605% when pulling 3abe19b on Keno:kf/size into b1714d9 on JuliaArrays:master.

[Keno]

Sorry, this isn't quite good enough. Will have an update in a sec.

[coveralls]

Coverage decreased (-0.2%) to 69.468% when pulling 8b4ae9c on Keno:kf/size into b1714d9 on JuliaArrays:master.

[andyferris]

Can we do this generically with #134?

[Keno]

Yes, we just have to be a bit careful. The compiler has some aversions here. These functions are very carefully written such that constant propagates down to llvm level. Check with e.g.:

f(A) = size(A,2)
@code_llvm f(A)

for any static array. Should be a constant. If you see anything else you're in trouble.