Martin Kustermann
407afe84ca
This reduces acx main: module -0.35%, global section: -2.3% Previous change in [0] made dynamic call sites have per-caller-shape dynamic forwarders. In this change we utilize this: Since we know the dynamic caller shape we can make the dynamic forwarder call via a closure representation that matches this caller shape (modulo the type arguments - as a dynamic call without type arguments may get default type arguments of unknown count). => This means we no longer have to pass types, positionals and named arguments as wasm arrays to dynamic call forwarder. Instead we can pass the arguments unpacked to the vtable. Additionally we change `Function.apply`: If we know there's no `Function.apply` usage with named arguments, we can enumerate all possible closure representations and call the corresponding vtable entry. We use 2 `br_table` instructions for this: * branch on number of type parameters * branch on number of positional parameters Together these two changes means that neither dynamic forwarders nor `Function.apply` will use the dynamic call entry. => We remove the dynamic call entry from the vtable construction The only exception to the above are: * If dynamic submodules is enabled we don't compute closed world information about closures and always call via dynamic call entry * If `Function.apply` is used with named arguments then call via dynamic call entry (and make vtables have it). [0] https://dart-review.googlesource.com/c/sdk/+/461720 Issue https://github.com/dart-lang/sdk/issues/60458 Change-Id: I26e6a2a48ee37616061d701dc4d4327c2e109e82 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/462060 Reviewed-by: Ömer Ağacan <omersa@google.com> Commit-Queue: Martin Kustermann <kustermann@google.com>
Dart
An approachable, portable, and productive language for high-quality apps on any platform
Dart is:
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Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.
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Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.
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Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.
Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:
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Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.
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Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
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