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LibJS: Use ranges instead of specifying all registers for NewArray

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Listing all the registers will lead to the inability to allocate enough
space in one basic block (as there can be an arbitrary number of
registers used), instead switch to specifying the range of registers
used and save a lot of space in the process.
This commit is contained in:
Ali Mohammad Pur 2022-03-14 14:48:42 +00:00 • committed by Ali Mohammad Pur
parent e517cb505a
commit a37bee919a
3 changed files with 50 additions and 23 deletions
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10
Userland/Libraries/LibJS/Bytecode/Op.h
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@ -232,12 +232,12 @@ public:
{
}
explicit NewArray(Vector<Register> const& elements)
explicit NewArray(AK::Array<Register, 2> const& elements_range)
: Instruction(Type::NewArray)
, m_element_count(elements.size())
, m_element_count(elements_range[1].index() - elements_range[0].index() + 1)
{
for (size_t i = 0; i < m_element_count; ++i)
m_elements[i] = elements[i];
m_elements[0] = elements_range[0];
m_elements[1] = elements_range[1];
}
ThrowCompletionOr<void> execute_impl(Bytecode::Interpreter&) const;
@ -246,7 +246,7 @@ public:
size_t length_impl() const
{
return sizeof(*this) + sizeof(Register) * m_element_count;
return sizeof(*this) + sizeof(Register) * (m_element_count == 0 ? 0 : 2);
}
private: