[Unity][Transform] Raise error in FuseOpsByPattern for SSA violation - #16421
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Internally, `FuseOpsByPattern` makes a mapping from relax variables to the fused group containing that variable. If the input module violates SSA, this map may be ill-formed. While not strictly necessary for FuseOps to handle ill-formed inputs, checking it at this level provides better error handling than propagating it to downstream passes. This commit checks for ill-formed inputs that would produce invalid fused outputs and raises an error.
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Rebased onto main to resolve conflicts |
slyubomirsky
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It's always good to have better error-checking, especially when the messages can be more meaningful. Thanks!
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Internally,
FuseOpsByPatternmakes a mapping from relax variables to the fused group containing that variable. If the input module violates SSA, this map may be ill-formed. While not strictly necessary for FuseOps to handle ill-formed inputs, checking it at this level provides better error handling than propagating it to downstream passes.This commit checks for ill-formed inputs that would produce invalid fused outputs and raises an error.