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LibJS: Generate bytecode in basic blocks instead of one big block

This limits the size of each block (currently set to 1K), and gets us
closer to a canonical, more easily analysable bytecode format.
As a result of this, "Labels" are now simply entries to basic blocks.
Since there is no more 'conditional' jump (as all jumps are always
taken), JumpIf{True,False} are unified to JumpConditional, and
JumpIfNullish is renamed to JumpNullish.
Also fixes #7914 as a result of reimplementing the loop logic.
This commit is contained in:
Ali Mohammad Pur 2021-06-09 06:49:58 +04:30 committed by Andreas Kling
parent d7a25cdb82
commit 01e8f0889a
16 changed files with 392 additions and 174 deletions

View file

@ -36,9 +36,8 @@
O(PutById) \
O(GetById) \
O(Jump) \
O(JumpIfFalse) \
O(JumpIfTrue) \
O(JumpIfNotNullish) \
O(JumpConditional) \
O(JumpNullish) \
O(Call) \
O(EnterScope) \
O(Return) \
@ -61,6 +60,8 @@ namespace JS::Bytecode {
class Instruction {
public:
constexpr static bool IsTerminator = false;
enum class Type {
#define __BYTECODE_OP(op) \
op,