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LibJS/Bytecode: Move environment variable caches into instructions

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These were out-of-line because we had some ideas about marking
instruction streams PROT_READ only, but that seems pretty arbitrary and
there's a lot of performance to be gained by putting these inline.
This commit is contained in:
Andreas Kling 2024-05-11 18:28:03 +02:00
commit 855f6417df
Notes: sideshowbarker 2024-07-17 14:33:07 +09:00
8 changed files with 33 additions and 53 deletions
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15
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
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@ -397,7 +397,7 @@ Bytecode::CodeGenerationErrorOr<Optional<ScopedOperand>> Identifier::generate_by
if (is_global()) {
generator.emit<Bytecode::Op::GetGlobal>(dst, generator.intern_identifier(m_string), generator.next_global_variable_cache());
} else {
generator.emit<Bytecode::Op::GetVariable>(dst, generator.intern_identifier(m_string), generator.next_environment_variable_cache());
generator.emit<Bytecode::Op::GetVariable>(dst, generator.intern_identifier(m_string));
}
return dst;
}
@ -1140,8 +1140,8 @@ Bytecode::CodeGenerationErrorOr<Optional<ScopedOperand>> FunctionDeclaration::ge
Bytecode::Generator::SourceLocationScope scope(generator, *this);
auto index = generator.intern_identifier(name());
auto value = generator.allocate_register();
generator.emit<Bytecode::Op::GetVariable>(value, index, generator.next_environment_variable_cache());
generator.emit<Bytecode::Op::SetVariable>(index, value, generator.next_environment_variable_cache(), Bytecode::Op::SetVariable::InitializationMode::Set, Bytecode::Op::EnvironmentMode::Var);
generator.emit<Bytecode::Op::GetVariable>(value, index);
generator.emit<Bytecode::Op::SetVariable>(index, value, Bytecode::Op::SetVariable::InitializationMode::Set, Bytecode::Op::EnvironmentMode::Var);
}
return Optional<ScopedOperand> {};
}
@ -1163,7 +1163,7 @@ Bytecode::CodeGenerationErrorOr<Optional<ScopedOperand>> FunctionExpression::gen
generator.emit_new_function(new_function, *this, lhs_name);
if (has_name) {
generator.emit<Bytecode::Op::SetVariable>(*name_identifier, new_function, generator.next_environment_variable_cache(), Bytecode::Op::SetVariable::InitializationMode::Initialize, Bytecode::Op::EnvironmentMode::Lexical);
generator.emit<Bytecode::Op::SetVariable>(*name_identifier, new_function, Bytecode::Op::SetVariable::InitializationMode::Initialize, Bytecode::Op::EnvironmentMode::Lexical);
generator.end_variable_scope();
}
@ -1641,8 +1641,7 @@ Bytecode::CodeGenerationErrorOr<Optional<ScopedOperand>> CallExpression::generat
generator.emit<Bytecode::Op::GetCalleeAndThisFromEnvironment>(
*original_callee,
this_value,
generator.intern_identifier(identifier.string()),
generator.next_environment_variable_cache());
generator.intern_identifier(identifier.string()));
}
} else {
// FIXME: this = global object in sloppy mode.
@ -2553,7 +2552,7 @@ Bytecode::CodeGenerationErrorOr<Optional<ScopedOperand>> TryStatement::generate_
did_create_variable_scope_for_catch_clause = true;
auto parameter_identifier = generator.intern_identifier(parameter);
generator.emit<Bytecode::Op::CreateVariable>(parameter_identifier, Bytecode::Op::EnvironmentMode::Lexical, false);
generator.emit<Bytecode::Op::SetVariable>(parameter_identifier, caught_value, generator.next_environment_variable_cache(), Bytecode::Op::SetVariable::InitializationMode::Initialize);
generator.emit<Bytecode::Op::SetVariable>(parameter_identifier, caught_value, Bytecode::Op::SetVariable::InitializationMode::Initialize);
}
return {};
},
@ -3437,7 +3436,6 @@ Bytecode::CodeGenerationErrorOr<Optional<ScopedOperand>> ExportStatement::genera
generator.emit<Bytecode::Op::SetVariable>(
generator.intern_identifier(ExportStatement::local_name_for_default),
value,
generator.next_environment_variable_cache(),
Bytecode::Op::SetVariable::InitializationMode::Initialize);
}
@ -3450,7 +3448,6 @@ Bytecode::CodeGenerationErrorOr<Optional<ScopedOperand>> ExportStatement::genera
generator.emit<Bytecode::Op::SetVariable>(
generator.intern_identifier(ExportStatement::local_name_for_default),
value,
generator.next_environment_variable_cache(),
Bytecode::Op::SetVariable::InitializationMode::Initialize);
return value;
}