Probably not. The out-of-order execution units in the cores rely heavily on register renaming to remove anti-dependences in the instructions stream and get more

Probably not. The out-of-order execution units in the cores rely heavily on register renaming to remove anti-dependences in the instructions stream and get more instructions executing in parallel. History (so far in most cases) has shown that this is a better approach to getting good performance than having compilers or humans try to statically manage all the physical registers themselves.