optimize ... when delegating an arglist. ref #3440
Merge branch 'master' of github.com:JuliaLang/julia
avoid redundant re-loads out of GC frame. ref #3440
happens to make sparse mul faster; #942
Merge branch 'master' of github.com:JuliaLang/julia
Merge branch 'master' of github.com:JuliaLang/julia