Optimize object return chaining

[DesWurstes]

a = a.b;
a = a.c;

can be optimized to

a = (a.b).c;

which is

a = a.b.c;

[ChadKillingsworth]

Any new compiler optimization has to provide either a substantial code size win (post gzip) or performance win. It's not clear to me that this would be either. Do you have real world examples of this pattern being used?

[ts-thomas]

At least it requires less chars for the same thing. This optimization is possibly a case which happens very often in the code, the sum of all might be noticeable smaller and faster.