Rename DummyInterceptorConstantValue to DummyConstantValue. It was
actually used as a dummy *receiver* argument and could be used against
any unused parameter.
Remove unused CompilerOptions argument in SSA as-checks and is-tests.
Pass the checked input explicitly to facilitate testing on other inputs (e.g. to do partial redundancy elimination by pushing the operation into the arms of a phi.)
Change-Id: I4b450bfcf5fc877de731bf83201e3c9248ffcb0c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/433104
Reviewed-by: Mayank Patke <fishythefish@google.com>
Commit-Queue: Stephen Adams <sra@google.com>
Add `@pragma('dart2js:allow-cse')` and `@pragma('dart2js:allow-dce')`.
These annotations allow the compiler to do common subexpression
elimination and dead code elimination on calls to getters and methods.
Change-Id: Ie4091466e4782a4d28a7f9bfbfdb60a5de45a384
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/426360
Reviewed-by: Nate Biggs <natebiggs@google.com>
Commit-Queue: Stephen Adams <sra@google.com>
These multitest comments interact poorly with `dart format` and make it
difficult to discern what's actually happening. This rewrite should be
clearer.
Change-Id: If5ad8c61be8d311fd9d1450897eeb88ec799e477
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/427585
Reviewed-by: Nate Biggs <natebiggs@google.com>
This was a very useful experiment to validate that a powerset domain
could answer certain abstract value domain queries more efficiently. Now
that the core ideas have been incorporated directly into the typemasks,
we no longer need to preserve the wrappers.
Change-Id: Ife3df6eeb119783da97eeb721d9c045e5da649ca
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/427020
Commit-Queue: Mayank Patke <fishythefish@google.com>
Reviewed-by: Stephen Adams <sra@google.com>
The CFE will now add an `as bool` when a `dynamic` value is used as a
condition, giving the condition the right static type. Without
`--omit-implicit-checks` we faithfully emit a cast, so no bool
conversion is needed. With `--omit-implicit-checks`, we trust that the
condition is a boolean and emit no check of any kind - but you get what
you asked for.
Change-Id: I5c9f6b6516386fab5b863f256f9676fc7abe19b2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/417323
Reviewed-by: Stephen Adams <sra@google.com>
When parsing `--define` or `-D` arguments don't split the the value by
commas.
This is consistent with how dart2js handles `-D`, but inconsistent with
how VM handles it.
Example:
void main() {
print(const String.fromEnvironment("FOO"));
}
When compiled with `dart compile js -DFOO="a, b"` and run, dart2js
prints
a, b
VM prints (when compiled to exe)
a
Between these two, I think dart2js' behavior is more common, so we
follow dart2js.
Also update compile_benchmark to avoid splitting a single argument "a b"
into "a" and "b" when parsing the arguments and then splicing them back
before calling `dart2wasm`.
Also update the test runner and ddc batch mode argument parser to handle
splitting quoted arguments in `// dart2jsOption = ...` and the same
options for ddc and dart2wasm, by moving dart2js's `splitLine` to a new
library and reusing it in the test runner and ddc.
Fixes https://github.com/flutter/flutter/issues/164873.
See also https://github.com/dart-lang/sdk/issues/60341 for relevant
future work.
Change-Id: Idbdf69072fa212c8e4a390990577eb5a57b49e8a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/415280
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Ömer Ağacan <omersa@google.com>
This change removes the `.created` constructor in the html
class hierarchy. These classes now only offer public factory
constructors. As a result, developers will no longer be able
to extend these classes in their libraries.
This is a breaking change, however we don't expect there to
be as much use of this feature (extending html element
classes). In particular, the ability to extend html elements
was intended for web components. Dart only ever supported
the 0.5 spec of web components, which is old and long
deprecated. Previously, in Dart 3.0, we removed APIs used
to register custom elements from `dart:html`, so the ability
to extend html elements has not been useful since then.
For more details see https://github.com/dart-lang/sdk/issues/53264
CoreLibraryReviewExempt: ddc/dart2js-specific library.
Change-Id: I43d8c9ae99dc83545e70e1f3b9dfc9f1b274a5c7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/321741
Reviewed-by: Lasse Nielsen <lrn@google.com>
Reviewed-by: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Stephen Adams <sra@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>
As the powerset grows, the cache needs to be keyed on both the base and
the full flags. While we're at it, we ensure that all FlatTypeMask
allocations go via the cache.
Change-Id: Ifdd400bf4ea23a936c4d37be91a5d527102aa3b4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/413700
Reviewed-by: Nate Biggs <natebiggs@google.com>
Commit-Queue: Mayank Patke <fishythefish@google.com>
We may find it useful later to add a more verbose stringification that
writes out the properties expressed by the powerset. For now, just
printing the int value is sufficient to debug e.g. test failures, and
it's relatively straightforward to manually convert an int to a set of
properties by looking at the definitions of the powerset domains.
Change-Id: I2397ffd83a6e86830f67c7f1ef811e33c0b7ff3c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/405567
Reviewed-by: Nate Biggs <natebiggs@google.com>
Sometimes the type expression of a is-test can be widened to one that
does not use type variables:
```dart
void addAll(Iterable<E> items) {
if (items is List<E>) {
... items[i] ... // code specialized to lists
}
...
}
```
Changing `is List<E>` to `is List` is more efficient, but not possible
at the source level since the explicit type parameter is needed for
type promotion.
This change uses a predicate provided by the Kernel package to widen
an interface type when generating the CFG instructions for the
is-test. This can lead to knock-on optimizations like compiling `is X`
to `instanceof`.
Bug: #54998
Change-Id: I956b9d9b8a31ae40aee86e31def475baa9ab5cfe
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/408124
Reviewed-by: Nate Biggs <natebiggs@google.com>
Commit-Queue: Stephen Adams <sra@google.com>
Dart's `throw` expression does not correspond exactly to JavaScript's `throw` statement. To implement Dart semantics, and to reduce code size, dart2js uses the functions `wrapException` and `throwExpression` from the dart2js runtime. As a result, these functions appear in the stack trace (one or both).
A consequence of this is that a fixed prefix of an error stack is less useful, as potentially interesting frames are forced out of the prefix by these 'noise' frames.
This change ensures only one of the helpers on the stack trace.
It is also possible to get rid of the helper frame by an annotation.
The annotation `@pragma('dart2js:stack-starts-at-throw')` causes the stack to be captured in the current JavaScript function rather than in a helper. The cost is more code at the call site, about 12 bytes per `throw` expression in minified code. The annotation can be placed on a method, class or library, and applies to all `throw` expression in the scope of the annotated element.
This change uses the annotation to remove noise frames from type errors and some other errors in the runtime.
Change-Id: If15184a5963fb054199177bb4526b32f25e53fe9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/406684
Reviewed-by: Mayank Patke <fishythefish@google.com>
Reviewed-by: Nate Biggs <natebiggs@google.com>
Calls to the implicit setters for fields are replaced with field assignments (HFieldSet). This is inhibited when the setter needs to check its argument, which happens when the field type is covariant and the checks not 'trusted', i.e. at optimizations level `-O2` and lower (aka 'spec' mode).
This optimization detects when the check is unnecessary due to invariance. If the receiver of a setter instance call to the the implicit setter has `this` as a receiver and the setter does not have an explicit `covariant` declaration, then the check will always pass, so the setter call can be replaced with HFieldSet.
This optimization works well for Iterators for generic collections at the assignment to the `_current` field, with some iteration-heavy benchmarks improved by 20-50% at `-O2`.
Change-Id: I4f3ffd08b45ba28de721535afc3c7a6d1e486a3d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/405448
Reviewed-by: Nate Biggs <natebiggs@google.com>
Commit-Queue: Stephen Adams <sra@google.com>
Redundant phi elimination removes phis that join the same value.
However, this does not work when one or more of the inputs has a refinement (HTypeKnown). This change adds redundant phi elimination when the phi inputs have refinements.
The need for this optimization shows up when static js_interop needs a dispatch on type for conversion:
```
final JSAny? jsValue;
if (value is String) {
jsValue = value.toJS;
} else if (value is bool) {
jsValue = value.toJS;
...
```
(The `.toJS` calls become no-ops since, for dart2js, we are already in JavaScript, and so leave an otherwise pointless if-then-else chain).
Change-Id: If1a94856592163a81ac36c686cee04232c16d197
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/403950
Reviewed-by: Nate Biggs <natebiggs@google.com>
Commit-Queue: Stephen Adams <sra@google.com>
Stephen Adams