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LibJS: Start fleshing out a bytecode for the JavaScript engine :^)

This patch begins the work of implementing JavaScript execution in a
bytecode VM instead of an AST tree-walk interpreter.

It's probably quite naive, but we have to start somewhere.

The basic idea is that you call Bytecode::Generator::generate() on an
AST node and it hands you back a Bytecode::Block filled with
instructions that can then be interpreted by a Bytecode::Interpreter.

This first version only implements two instructions: Load and Add. :^)

Each bytecode block has infinity registers, and the interpreter resizes
its register file to fit the block being executed.

Two new `js` options are added in this patch as well:

`-d` will dump the generated bytecode
`-b` will execute the generated bytecode

Note that unless `-d` and/or `-b` are specified, none of the bytecode
related stuff in LibJS runs at all. This is implemented in parallel
with the existing AST interpreter. :^)
This commit is contained in:
Andreas Kling 2021-06-03 10:46:30 +02:00
parent f9395efaac
commit 69dddd4ef5
16 changed files with 487 additions and 24 deletions

View file

@ -1,25 +1,30 @@
set(SOURCES
AST.cpp
Console.cpp
Heap/CellAllocator.cpp
Heap/BlockAllocator.cpp
Heap/Handle.cpp
Heap/HeapBlock.cpp
Heap/Heap.cpp
Interpreter.cpp
Lexer.cpp
MarkupGenerator.cpp
Parser.cpp
Runtime/Array.cpp
Runtime/ArrayBuffer.cpp
Runtime/ArrayBufferConstructor.cpp
Runtime/ArrayBufferPrototype.cpp
Runtime/ArrayConstructor.cpp
Runtime/ArrayIterator.cpp
Runtime/ArrayIteratorPrototype.cpp
Runtime/ArrayPrototype.cpp
Runtime/BigInt.cpp
Runtime/BigIntConstructor.cpp
AST.cpp
Bytecode/Block.cpp
Bytecode/Generator.cpp
Bytecode/Instruction.cpp
Bytecode/Interpreter.cpp
Bytecode/Op.cpp
Console.cpp
Heap/CellAllocator.cpp
Heap/BlockAllocator.cpp
Heap/Handle.cpp
Heap/HeapBlock.cpp
Heap/Heap.cpp
Interpreter.cpp
Lexer.cpp
MarkupGenerator.cpp
Parser.cpp
Runtime/Array.cpp
Runtime/ArrayBuffer.cpp
Runtime/ArrayBufferConstructor.cpp
Runtime/ArrayBufferPrototype.cpp
Runtime/ArrayConstructor.cpp
Runtime/ArrayIterator.cpp
Runtime/ArrayIteratorPrototype.cpp
Runtime/ArrayPrototype.cpp
Runtime/BigInt.cpp
Runtime/BigIntConstructor.cpp
Runtime/BigIntObject.cpp
Runtime/BigIntPrototype.cpp
Runtime/BooleanConstructor.cpp