Ensure that outgoing constant arguments will be materialized.

Ensure that outgoing constant arguments will be materialized.

This keeps the IL simple for the benefit of the optimizing compiler.
It intentionally relies on a particular temporary allocation strategy
for the non-optimizing compiler.

For the dart function

main() {
  var x = 2;
  hukairs(1, x, 3);
}

The flow graph is:

 0: [target]
    StoreLocal(x, #2)
    t0 <-#1
    t1 <-LoadLocal(x)
    t2 <-#3
    StaticCall(hukairs, t0, t1, t2)
    return #null

R=srdjan@google.com
BUG=
TEST=

Committed: https://code.google.com/p/dart/source/detail?r=4600

[Kevin Millikin (Google), 2012-02-24 11:27:56]

I added a Translate helper for arguments lists rather than using
VisitArgumentListNode because that function can't take arguments/return values
and I don't want to add more state to the visitor for only this purpose.

I passed the argument array as an in/out parameter rather than returning it to
support the case of general InstanceCall (where the receiver is an implicit
first argument).

[srdjan, 2012-02-24 15:35:40]

LGTM