VM: Fix bug in the new edge counter code on ARM and MIPS.

VM: Fix bug in the new edge counter code on ARM and MIPS.

The offset into the edge counter array may exceed the limit
of what fits into an Address operand on ARM and MIPS.

BUG=
R=rmacnak@google.com

Committed: https://github.com/dart-lang/sdk/commit/66bc931b6922b96c65b401a0cdee2c97a8233ae8

[Florian Schneider, 2015-09-28 17:04:24]

fschneider@google.com changed reviewers:
+ rmacnak@google.com

[rmacnak, 2015-09-28 17:15:27]

lgtm w/c

https://codereview.chromium.org/1373013002/diff/1/runtime/vm/flow_graph_compi...
File runtime/vm/flow_graph_compiler_arm.cc (right):

https://codereview.chromium.org/1373013002/diff/1/runtime/vm/flow_graph_compi...
runtime/vm/flow_graph_compiler_arm.cc:1191: const Array& counter =
Array::ZoneHandle(zone(), Array::New(1, Heap::kOld));
Dead allocation.

[Florian Schneider, 2015-09-28 17:17:25]

https://codereview.chromium.org/1373013002/diff/1/runtime/vm/flow_graph_compi...
File runtime/vm/flow_graph_compiler_arm.cc (right):

https://codereview.chromium.org/1373013002/diff/1/runtime/vm/flow_graph_compi...
runtime/vm/flow_graph_compiler_arm.cc:1191: const Array& counter =
Array::ZoneHandle(zone(), Array::New(1, Heap::kOld));
On 2015/09/28 17:15:27, rmacnak wrote:
> Dead allocation.

Good catch. Done.

[Florian Schneider, 2015-09-28 17:38:47]

Committed patchset #2 (id:20001) manually as
66bc931b6922b96c65b401a0cdee2c97a8233ae8 (presubmit successful).