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LibJS: Eliminate GeneratorResult GC cell allocation on yield/await

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Store yield_continuation and yield_is_await directly in
ExecutionContext instead of allocating a GeneratorResult GC cell.
This removes a heap allocation per yield/await and fixes a latent
bug where continuation addresses stored as doubles could lose
precision.
This commit is contained in:
Johan Dahlin
2026-03-16 00:02:11 +01:00
committed by Andreas Kling
parent 9a34fb59aa
commit 1179e40d3f
Notes: github-actions[bot] 2026-03-20 20:58:50 +00:00 
Author: https://github.com/jdahlin
Commit: https://github.com/LadybirdBrowser/ladybird/commit/1179e40d3f4
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/8457
Reviewed-by: https://github.com/awesomekling
14 changed files with 90 additions and 176 deletions
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4
Libraries/LibJS/Bytecode/Interpreter.h
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@@ -34,9 +34,9 @@ public:
ThrowCompletionOr<Value> run(Script&, GC::Ptr<Environment> lexical_environment_override = nullptr);
ThrowCompletionOr<Value> run(SourceTextModule&);
ThrowCompletionOr<Value> run_executable(ExecutionContext&, Executable&, Optional<size_t> entry_point);
ThrowCompletionOr<Value> run_executable(ExecutionContext&, Executable&, u32 entry_point = 0);
ThrowCompletionOr<Value> run_executable(ExecutionContext& context, Executable& executable, Optional<size_t> entry_point, Value initial_accumulator_value)
ThrowCompletionOr<Value> run_executable(ExecutionContext& context, Executable& executable, u32 entry_point, Value initial_accumulator_value)
{
context.registers_and_constants_and_locals_and_arguments_span()[0] = initial_accumulator_value;
return run_executable(context, executable, entry_point);