Commit graph

5 commits

Author SHA1 Message Date
Andreas Kling
9f822345bf LibJS: Flatten Operand to 32-bit index in bytecode instruction stream
While we're in the bytecode compiler, we want to know which type of
Operand we're dealing with, but once we've generated the bytecode
stream, we only ever need its index.

This patch simplifies Operand by removing the aarch64 bitfield hacks
and makes it 32-bit on all platforms. We keep 3 type bits in the high
bits of the index while compiling, and then zero them out when
flattening the final bytecode stream.

This makes bytecode more compact on x86_64, and avoids bit twiddling
on aarch64. Everyone wins something!

When stringifying bytecode for debugging output, we now have an API in
Executable that can look at a raw operand index and tell you what type
of operand it was, based on known quantities of each type in the stack
frame.
2025-12-09 21:44:13 -06:00
Andreas Kling
e7388646bb LibJS: Remove unused InstructionStreamIterator::source_range() 2025-11-21 09:46:03 +01:00
Andreas Kling
f37063e2a1 LibJS: Stop worrying about Instruction destructors
By adding static_asserts to prove that all of our generated instruction
classes are trivially destructible, we can confidently remove the
destructor walk in BasicBlock and save ourselves some unnecessary work.
2025-11-21 09:46:03 +01:00
Andrew Kaster
59b1fb23a9 LibJS: Remove unused InstructionStreamIterator::source_code getter 2025-04-16 10:41:44 -06:00
Timothy Flynn
93712b24bf Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
Renamed from Userland/Libraries/LibJS/Bytecode/Instruction.cpp (Browse further)