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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.
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16 changed files with 392 additions and 174 deletions
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@ -36,9 +36,8 @@
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O(PutById) \
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O(GetById) \
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O(Jump) \
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O(JumpIfFalse) \
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O(JumpIfTrue) \
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O(JumpIfNotNullish) \
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O(JumpConditional) \
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O(JumpNullish) \
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O(Call) \
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O(EnterScope) \
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O(Return) \
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@ -61,6 +60,8 @@ namespace JS::Bytecode {
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class Instruction {
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public:
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constexpr static bool IsTerminator = false;
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enum class Type {
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#define __BYTECODE_OP(op) \
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op,
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