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LibJS/Bytecode: Emit for condition check before update statement

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This allows jump elision to eliminate an unnecessary jump since things
now get laid out naturally in memory (normal execution order).
This commit is contained in:
Andreas Kling
2024-05-06 09:34:42 +02:00
parent 24d8b056c7
commit 69cc64e94c
Notes: sideshowbarker 2024-07-17 08:34:29 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/69cc64e94c
Pull-request: https://github.com/SerenityOS/serenity/pull/24240
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/trflynn89 ✅
1 changed files with 5 additions and 5 deletions
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10
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
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@@ -888,16 +888,16 @@ Bytecode::CodeGenerationErrorOr<Optional<Bytecode::Operand>> ForStatement::gener
body_block_ptr = &generator.make_block();
if (m_test)
test_block_ptr = &generator.make_block();
else
test_block_ptr = body_block_ptr;
if (m_update)
update_block_ptr = &generator.make_block();
else
update_block_ptr = body_block_ptr;
if (m_test)
test_block_ptr = &generator.make_block();
else
test_block_ptr = body_block_ptr;
generator.emit<Bytecode::Op::Jump>(Bytecode::Label { *test_block_ptr });
if (m_test) {