This is in preparation to migrate package:kernel to null safety.
For the visitor interfaces to support non-nullable return types, the
implementations must avoid using `null` as return value in its base case.
TEST=Refactoring
Change-Id: I9f9b318982148d844be9826a5f8c88374a9fc402
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172180
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Jens Johansen <jensj@google.com>
This should cause no change in behavior, but the layer of indirection
keeps us from assuming that typemasks are the underlying implementation
of the abstract value domain.
Change-Id: I2b51b0da489407de86d5638b2eda9541fdd0276e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/171780
Reviewed-by: Stephen Adams <sra@google.com>
Commit-Queue: Mayank Patke <fishythefish@google.com>
Index bounds checks are now added as part of lowering `[]`, `[]=` and
`removeLast()` rather that being added later in a separate pass.
To know when to add checks, new trust/check annotations have been
added:
@pragma('dart2js:index-bounds:trust')
@pragma('dart2js:index-bounds:check')
These default according to the `--trust-primitives` command-line
option.
In order to consult the annotations, the enclosing context of the
method call is tracked. This allows annotations to be applied correctly
when several methods with different annotations are inlined.
Change-Id: I22e1acf90b85ad0d100766b85a50095ced9815e9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/171632
Commit-Queue: Stephen Adams <sra@google.com>
Reviewed-by: Mayank Patke <fishythefish@google.com>
Simple calls to `List.generate` are expanded into a list allocation
and a loop. This generates better code for several reasons:
- There is no overhead for the function argument (closure allocation,
closure type, closure class)
- Global type inference is more precise since each List.generate list
is tracked separately, and the assignments in the loop give better
inference to the collection's element type.
To get precise element type inference, there are two new JSArray
constructors. Global type inference starts with the element type being
bottom for these elements, avoiding spurious nulls in the inferred
type.
Change-Id: I5efb90651ae3f9eb2e81af556704960cdf0b75c5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/168770
Commit-Queue: Stephen Adams <sra@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
The 'isInvariant' property of ir.MethodInvocation nodes allows dart2js
to lower JSArray.add to Array.push in more cases. It is set in the
expansion of List literals.
Change-Id: I6c08ec449e6f7e2b2d839e9faeeff2c338f29e5a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/171080
Commit-Queue: Stephen Adams <sra@google.com>
Reviewed-by: Mayank Patke <fishythefish@google.com>
`List.of` avoids per-element checks and no longer forwards to
the more expensive `List.from`.
Global type inference infers `List.of` and `List.from` as new
list allocations.
Bug: 40211
Bug: 32937
Change-Id: I54746610a1b0089ec54e43459301720105f872ef
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170127
Commit-Queue: Stephen Adams <sra@google.com>
Reviewed-by: Mayank Patke <fishythefish@google.com>
Most of the time one already knows at the call site if it's a Field,
a Procedure etc --- so use that instead.
For now I'll leave the corresponding getters that are basically
documented as "don't use" ("[...] for convenience, not efficiency.
Consider manually iterating the members [...]").
Change-Id: Ib732759432c62963e6645f85f6df301c4281df9d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/168826
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Modifies ddc and dart2js logic to only include null-checks on native
members inside the web libraries. Modifies tests to account for this
change.
Change-Id: If9c164fb90b761d3c4611d87ffeb02c2fa884457
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/168585
Reviewed-by: Nicholas Shahan <nshahan@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Even when non-nullable is enabled by default, enabling the experiment
explicitly should result in the experiment release version (and not
the experiment enabled version) to be used for opting in.
For this change, the semantics of parseExperimentalFlags was change
to _not_ normalize the flags to a full mapping including default values.
For this reason all uses of such maps are renamed to
'explicitExperimentalFlags'.
Closes#43879
Change-Id: I0d0262e68ec1403549abcfd305ae3a4404fe93e3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/168654
Reviewed-by: Jake Macdonald <jakemac@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
We need to register `findType` with the codegen registry whenever we
construct a `TypeReference` so that the function is available at
runtime. We primarily do this whenever we encounter an `HLoadType`.
However, it's possible that we only construct a `TypeReference` during
constant emission, and therefore never register a static use.
We can use the `CodegenImpactTransformer` to register a static use for
`findType` whenever we encounter a `ConstantUse` whose value requires
it. These correspond to the uses of `_reifiedTypeNewRti` in the constant
emitter.
Change-Id: I93dade3c326f7e2c9d4806d8bdc2ee576a20d1c1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/165480
Commit-Queue: Mayank Patke <fishythefish@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Checks to see if a JS interop member is correctly annotated with
the `external` keyword. If it is not, it must be one of several
exceptions to be allowed.
This CL also changes static errors to first check for `JS` and
`external` before processing the member as a JS interop member.
This makes it clearer whether a member is a JS member.
Change-Id: I412eeafbfe8773847bfb9c864e4fb9b65e2d632a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/158083
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Use the 'growable:' argument or its absence to pick a better type for
List.of, List.from, List.generate, List.empty and List.filled.
Fixes a bug where it was assumed that List.filled was always fixed length.
Slightly better type analysis on some apps, but nothing that is measurable on benchmarks.
Change-Id: Ibe029a93488412956273fc981f626d33bd295386
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/163132
Commit-Queue: Stephen Adams <sra@google.com>
Reviewed-by: Mayank Patke <fishythefish@google.com>
If a method appears unreachable because a parameter is inferred
'[empty]', compile the body to a throw.
Playing with the flag found some cases where the inferrer was not
inferring parameters because the call sites are not visible in Kernel.
The first example is _isTestViaProperty, which is referenced as a raw
function. To fix this we consider RAW_DART_FUNCTION_REF to escape the
function. The inputs are now inferred to be TOP, and we can remove the
dynamic entry checks with 'trust' annotations.
Other cases are functions that are injected into generators by a
JavaScript-level transform. Annotate these to prevent bad codegen.
Change-Id: I991fe85936ffde6fc2c794f753171df141dde8f3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/162822
Commit-Queue: Stephen Adams <sra@google.com>
Reviewed-by: Mayank Patke <fishythefish@google.com>
Johnni Winther