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LibJS/JIT: Compile the NewRegExp bytecode instruction

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This commit is contained in:
Andreas Kling 2023-10-27 17:07:30 +02:00
parent d6756decb9
commit c1551a64dc
6 changed files with 60 additions and 22 deletions
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20
Userland/Libraries/LibJS/Bytecode/CommonImplementations.cpp
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@ -11,6 +11,7 @@
#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
#include <LibJS/Runtime/GlobalEnvironment.h>
#include <LibJS/Runtime/ObjectEnvironment.h>
#include <LibJS/Runtime/RegExpObject.h>
namespace JS::Bytecode {
@ -375,4 +376,23 @@ ThrowCompletionOr<CalleeAndThis> get_callee_and_this_from_environment(Bytecode::
};
}
// 13.2.7.3 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-regular-expression-literals-runtime-semantics-evaluation
Value new_regexp(VM& vm, ParsedRegex const& parsed_regex, DeprecatedString const& pattern, DeprecatedString const& flags)
{
// 1. Let pattern be CodePointsToString(BodyText of RegularExpressionLiteral).
// 2. Let flags be CodePointsToString(FlagText of RegularExpressionLiteral).
// 3. Return ! RegExpCreate(pattern, flags).
auto& realm = *vm.current_realm();
Regex<ECMA262> regex(parsed_regex.regex, parsed_regex.pattern, parsed_regex.flags);
// NOTE: We bypass RegExpCreate and subsequently RegExpAlloc as an optimization to use the already parsed values.
auto regexp_object = RegExpObject::create(realm, move(regex), pattern, flags);
// RegExpAlloc has these two steps from the 'Legacy RegExp features' proposal.
regexp_object->set_realm(realm);
// We don't need to check 'If SameValue(newTarget, thisRealm.[[Intrinsics]].[[%RegExp%]]) is true'
// here as we know RegExpCreate calls RegExpAlloc with %RegExp% for newTarget.
regexp_object->set_legacy_features_enabled(true);
return regexp_object;
}
}

1
Userland/Libraries/LibJS/Bytecode/CommonImplementations.h
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@ -30,5 +30,6 @@ struct CalleeAndThis {
Value this_value;
};
ThrowCompletionOr<CalleeAndThis> get_callee_and_this_from_environment(Bytecode::Interpreter&, DeprecatedFlyString const& name, u32 cache_index);
Value new_regexp(VM&, ParsedRegex const&, DeprecatedString const& pattern, DeprecatedString const& flags);
}

27
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
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@ -708,30 +708,13 @@ ThrowCompletionOr<void> NewObject::execute_impl(Bytecode::Interpreter& interpret
return {};
}
// 13.2.7.3 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-regular-expression-literals-runtime-semantics-evaluation
ThrowCompletionOr<void> NewRegExp::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto& realm = *vm.current_realm();
// 1. Let pattern be CodePointsToString(BodyText of RegularExpressionLiteral).
auto pattern = interpreter.current_executable().get_string(m_source_index);
// 2. Let flags be CodePointsToString(FlagText of RegularExpressionLiteral).
auto flags = interpreter.current_executable().get_string(m_flags_index);
// 3. Return ! RegExpCreate(pattern, flags).
auto& parsed_regex = interpreter.current_executable().regex_table->get(m_regex_index);
Regex<ECMA262> regex(parsed_regex.regex, parsed_regex.pattern, parsed_regex.flags);
// NOTE: We bypass RegExpCreate and subsequently RegExpAlloc as an optimization to use the already parsed values.
auto regexp_object = RegExpObject::create(realm, move(regex), move(pattern), move(flags));
// RegExpAlloc has these two steps from the 'Legacy RegExp features' proposal.
regexp_object->set_realm(*vm.current_realm());
// We don't need to check 'If SameValue(newTarget, thisRealm.[[Intrinsics]].[[%RegExp%]]) is true'
// here as we know RegExpCreate calls RegExpAlloc with %RegExp% for newTarget.
regexp_object->set_legacy_features_enabled(true);
interpreter.accumulator() = regexp_object;
interpreter.accumulator() = new_regexp(
interpreter.vm(),
interpreter.current_executable().regex_table->get(m_regex_index),
interpreter.current_executable().get_string(m_source_index),
interpreter.current_executable().get_string(m_flags_index));
return {};
}

4
Userland/Libraries/LibJS/Bytecode/Op.h
View file

@ -187,6 +187,10 @@ public:
ThrowCompletionOr<void> execute_impl(Bytecode::Interpreter&) const;
DeprecatedString to_deprecated_string_impl(Bytecode::Executable const&) const;
StringTableIndex source_index() const { return m_source_index; }
StringTableIndex flags_index() const { return m_flags_index; }
RegexTableIndex regex_index() const { return m_regex_index; }
private:
StringTableIndex m_source_index;
StringTableIndex m_flags_index;