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LibJS: Generate unwind chains for break in Bytecode

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This uses a newly added instruction `ScheduleJump`
This instruction tells the finally proceeding it, that instead of
jumping to it's next block it should jump to the designated block.
This commit is contained in:
Hendiadyoin1 2022-11-25 16:15:34 +01:00 • committed by Linus Groh
parent 495ba53e46
commit f5376cb282
9 changed files with 123 additions and 19 deletions
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4
Userland/Libraries/LibJS/Bytecode/Pass/GenerateCFG.cpp
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@ -134,6 +134,10 @@ static void generate_cfg_for_block(BasicBlock const& current_block, PassPipeline
if (auto const* finalizer = unwind_frames.last()->finalizer)
enter_label(Label { *finalizer }, current_block);
return;
case ScheduleJump:
enter_label(Label { *unwind_frames.last()->finalizer }, current_block);
enter_label(static_cast<Op::ScheduleJump const&>(instruction).target(), *unwind_frames.last()->finalizer);
return;
default:
dbgln("Unhandled terminator instruction: `{}`", instruction.to_deprecated_string(executable.executable));
VERIFY_NOT_REACHED();