Implemente overflowing_sh* with new unchecked_sh* intrinsics#40521

Merged

bors merged 2 commits intorust-lang:masterfrom

TimNN:panic-free-shift

Mar 20, 2017

Commits on Mar 15, 2017

make shift builtins panic-free with new unchecked_sh* intrinsics
TimNN
committed

Commits on Mar 18, 2017

add inline attributes to stage 0 methods
TimNN
committed