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Reduce usage JumpIfTrueOrPop & JumpIfFalseOrPop opcdes. Refactor compile_compare #6524

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Merged
youknowone merged 8 commits into from
Dec 26, 2025
Merged

Reduce usage JumpIfTrueOrPop & JumpIfFalseOrPop opcdes. Refactor compile_compare #6524

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1445698
Remove `JumpIfTrueOrPop` & `JumpIfFalseOrPop` opcdes
ShaharNaveh Dec 25, 2025
70ef6d0
Merge remote-tracking branch 'upstream/main' into bytecode-remove-jum…
ShaharNaveh Dec 25, 2025
62259f3
Use correct instruction name
ShaharNaveh Dec 25, 2025
999f6ac
Extract `compile_cmpop` to its own method
ShaharNaveh Dec 25, 2025
186b914
Better alignment with CPython code
ShaharNaveh Dec 26, 2025
a1399bc
Merge remote-tracking branch 'upstream/main' into bytecode-remove-jum…
ShaharNaveh Dec 26, 2025
48f3772
Restore `PopJumpIf` instructions
ShaharNaveh Dec 26, 2025
582d1e0
Revert PopJumpIfFalse for comparisons
ShaharNaveh Dec 26, 2025
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Revert PopJumpIfFalse for comparisons
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@ShaharNaveh
ShaharNaveh committed Dec 26, 2025
commit 582d1e03c6a1a78962c73714bb2599e52d3b5908
4 changes: 4 additions & 0 deletions crates/codegen/src/compile.rs
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Expand Up @@ -4115,10 +4115,14 @@ impl Compiler {
self.compile_addcompare(op);

// if comparison result is false, we break with this value; if true, try the next one.
/*
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@youknowone youknowone Dec 26, 2025

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what was the blocker of this?

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@ShaharNaveh ShaharNaveh Dec 26, 2025

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That's the only reason why both opcodes stayed:/

This change caused regression for

RustPython/Lib/test/test_compile.py

Lines 1073 to 1081 in 61ddd98

def test_no_wraparound_jump(self):
# See https://bugs.python.org/issue46724
def while_not_chained(a, b, c):
while not (a < b < c):
pass
for instr in dis.Bytecode(while_not_chained):
self.assertNotEqual(instr.opname, "EXTENDED_ARG")

Not because it found an EXTENDED_ARG, but because iterating over dis.Bytecode(...) gave an error

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@youknowone youknowone Dec 26, 2025

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if that's because our test_compile is an old one, replacing it will be also good.

emit!(self, Instruction::CopyItem { index: 1 });
// emit!(self, Instruction::ToBool); // TODO: Uncomment this
emit!(self, Instruction::PopJumpIfFalse { target: cleanup });
emit!(self, Instruction::PopTop);
*/

emit!(self, Instruction::JumpIfFalseOrPop { target: cleanup });
}

self.compile_expression(last_comparator)?;
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