Provide global toggles for static control flow folding#2912
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A static conditional can be evaluated trivially at trace time since it doesn't really have a reason to exist. Static loops still serve the purpose of compacting the program, but will introduce additional dynamic variables. In some conditions resolving these at trace time can be desirable. The toggle is global because in the context where the decision is made we don't have access to QJIT-instance specific compilation options. This is the simplest way forward, although alternatives could expand the EvaluationContext with a QJIT's CompileOptions for example.
rniczh
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paul0403
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isaacdevlugt
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Nice! Just added some docs suggestions :)
Co-authored-by: Isaac De Vlugt <34751083+isaacdevlugt@users.noreply.github.com>
isaacdevlugt
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #2912 +/- ##
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Coverage 96.94% 96.94%
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Files 166 165 -1
Lines 19067 19073 +6
Branches 1760 1763 +3
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+ Hits 18485 18491 +6
Misses 430 430
Partials 152 152 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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isaacdevlugt
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Co-authored-by: Isaac De Vlugt <34751083+isaacdevlugt@users.noreply.github.com>
JerryChen97
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…icates (PennyLaneAI#9630) **Context:** Recently Catalyst [started evaluating static conditionals at tracing time in legacy path](PennyLaneAI/catalyst#2912). This means in cases where the conditional predicate is static, only the correct branch will be taken, and no catalyst `cond` operators will be traced. In RS decomp, there is one place where the catalyst `cond` operator was unconditionally queried and queued into a new tape. **Description of the Change:** Only query the catalyst `cond` operator when the predicate is not static. **Benefits:** Unblocks work by fixing a test.
sarababaeii
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A static conditional can be evaluated trivially at trace time since it doesn't really have a reason to exist. Static loops still serve the purpose of compacting the program, but will introduce additional dynamic variables. In some conditions resolving these at trace time can also be desirable. The toggle is global because in the context where the decision is made we don't have access to QJIT-instance specific compilation options. This is the simplest way forward, although alternatives could expand the EvaluationContext with a reference to the currently active `CompileOptions` in the future (for example). [sc-121161] --------- Co-authored-by: Isaac De Vlugt <34751083+isaacdevlugt@users.noreply.github.com>
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A static conditional can be evaluated trivially at trace time since it doesn't really have a reason to exist. Static loops still serve the purpose of compacting the program, but will introduce additional dynamic variables. In some conditions resolving these at trace time can also be desirable.
The toggle is global because in the context where the decision is made we don't have access to QJIT-instance specific compilation options. This is the simplest way forward, although alternatives could expand the EvaluationContext with a reference to the currently active
CompileOptionsin the future (for example).[sc-121161]