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LibJS/JIT: Add fast path for loose equality check between 2 objects

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There are more fast paths to be added here, just starting with this
one since it's heavy on Kraken/ai-astar.js :^)
This commit is contained in:
Andreas Kling 2023-11-12 14:42:37 +01:00
parent 4e9e183a34
commit e41f0d9dec
2 changed files with 45 additions and 1 deletions
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45
Userland/Libraries/LibJS/JIT/Compiler.cpp
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@ -618,6 +618,51 @@ static ThrowCompletionOr<Value> strict_equals(VM&, Value src1, Value src2)
return Value(is_strictly_equal(src1, src2));
}
static Value cxx_loosely_equals(VM& vm, Value lhs, Value rhs)
{
return TRY_OR_SET_EXCEPTION(loosely_equals(vm, lhs, rhs));
}
void Compiler::compile_loosely_equals(Bytecode::Op::LooselyEquals const& op)
{
Assembler::Label end;
load_vm_register(ARG1, op.lhs());
load_accumulator(ARG2);
// Fast path if both sides are objects.
branch_if_object(ARG1, [&] {
branch_if_object(ARG2, [&] {
Assembler::Label true_case;
m_assembler.jump_if(
Assembler::Operand::Register(ARG1),
Assembler::Condition::EqualTo,
Assembler::Operand::Register(ARG2),
true_case);
m_assembler.mov(
Assembler::Operand::Register(GPR0),
Assembler::Operand::Imm(Value(false).encoded()));
store_accumulator(GPR0);
m_assembler.jump(end);
true_case.link(m_assembler);
m_assembler.mov(
Assembler::Operand::Register(GPR0),
Assembler::Operand::Imm(Value(true).encoded()));
store_accumulator(GPR0);
m_assembler.jump(end);
});
});
native_call((void*)cxx_loosely_equals);
store_accumulator(RET);
check_exception();
end.link(m_assembler);
}
# define DO_COMPILE_COMMON_BINARY_OP(TitleCaseName, snake_case_name) \
static Value cxx_##snake_case_name(VM& vm, Value lhs, Value rhs) \
{ \