dartj2s: add constructor helpers for map literals with no type parameters.

dartj2s: add constructor helpers for map literals with no type parameters.

R=herhut@google.com

Committed: https://code.google.com/p/dart/source/detail?r=45133

[zarah, 2015-04-14 08:13:23]

The first patch is a (rebased) copy of issue 712263002. Creating a new issue
here since I need to add changes and I am not the owner of the original one.

[zarah, 2015-04-14 09:53:22]

zarah@google.com changed reviewers:
+ herhut@google.com

[herhut, 2015-04-14 11:00:14]

lgtm

https://codereview.chromium.org/1051223003/diff/40001/pkg/compiler/lib/src/ss...
File pkg/compiler/lib/src/ssa/builder.dart (right):

https://codereview.chromium.org/1051223003/diff/40001/pkg/compiler/lib/src/ss...
pkg/compiler/lib/src/ssa/builder.dart:5664: if (typeInputs.every((HInstruction
input) => input.isNull())) {
Can you add a comment about what this is doing, i.e., that we have lifted this
common pattern to save on size?

[zarah, 2015-04-14 11:27:56]

https://codereview.chromium.org/1051223003/diff/40001/pkg/compiler/lib/src/ss...
File pkg/compiler/lib/src/ssa/builder.dart (right):

https://codereview.chromium.org/1051223003/diff/40001/pkg/compiler/lib/src/ss...
pkg/compiler/lib/src/ssa/builder.dart:5664: if (typeInputs.every((HInstruction
input) => input.isNull())) {
On 2015/04/14 11:00:14, herhut wrote:
> Can you add a comment about what this is doing, i.e., that we have lifted this
> common pattern to save on size?

Done.

[zarah, 2015-04-14 11:28:41]

Committed patchset #4 (id:60001) manually as 45133 (presubmit successful).