Fix bug with missing unboxed mint-to-double conversion.

Fix bug with missing unboxed mint-to-double conversion.

In case of a mixed integer/double operation that has a mint
input, the corresponding conversion from unboxed mint to unboxed
double was missing.

This CL converts a unboxed mint to a double by first boxing,
and then unboxing. Currently, we deoptimize in case the result
does not fit into a smi because we can only optimize mixed
smi/double operations and not yet mint/double operations.

BUG=dart:5721
TEST=tests/language/mint_arithmetic.dart

Committed: http://code.google.com/p/dart/source/detail?r=13372

[srdjan, 2012-10-08 19:36:15]

LGTM

https://codereview.chromium.org/11017017/diff/1/runtime/vm/flow_graph_optimiz...
File runtime/vm/flow_graph_optimizer.cc (right):

https://codereview.chromium.org/11017017/diff/1/runtime/vm/flow_graph_optimiz...
runtime/vm/flow_graph_optimizer.cc:145: CreateConversion(from_rep, to_rep,
instr, use, def, deopt_target);
Maybe rename CreateConversion to InsertConversion?

[Florian Schneider, 2012-10-08 20:18:56]

https://codereview.chromium.org/11017017/diff/1/runtime/vm/flow_graph_optimiz...
File runtime/vm/flow_graph_optimizer.cc (right):

https://codereview.chromium.org/11017017/diff/1/runtime/vm/flow_graph_optimiz...
runtime/vm/flow_graph_optimizer.cc:145: CreateConversion(from_rep, to_rep,
instr, use, def, deopt_target);
On 2012/10/08 19:36:15, srdjan wrote:
> Maybe rename CreateConversion to InsertConversion?

Done.