Closed Bug 1482253 Opened 6 years ago Closed 5 years ago

Create CacheIR Op metadata

Categories

(Core :: JavaScript Engine: JIT, enhancement, P3)

enhancement

Tracking

()

RESOLVED DUPLICATE of bug 1526425
Tracking Status
firefox63 --- affected

People

(Reporter: mgaudet, Unassigned)

References

(Blocks 1 open bug)

Details

In a similar manner to how the JS Opcodes have metadata, it would be useful to provide metadata on CacheIR ops. 

At minimum, the length would be incredibly useful to have. However I can also imagine use for information like whether or not the operand has a stub field or not.

It would simplify writing CacheIR parsing code like this [1], where the length is 'expected' but there's no way to assert or ensure this remains true outside of auditing. 


[1]: https://searchfox.org/mozilla-central/rev/aff5d4ad5d7fb2919d267cbc23b1d87ae3cf0110/js/src/jit/BaselineInspector.cpp#322-349
Oh-- other data you could collect: 

- Does the op fill in the result register
- If so, what type?
Priority: -- → P3
Blocks: 1425584

Forward duping to the more thoroughly thought through Bug 1526425

Status: NEW → RESOLVED
Closed: 5 years ago
Resolution: --- → DUPLICATE
No longer blocks: 1425584
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