[Relax] Validate StructInfo of variable bindings #17332
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This validation exposed a bug in The bug in |
In Relax, both the variable and the expression in a `VarBinding` may contain `StructInfo` annotations. Prior to this commit, these `StructInfo` annotations could be inconsistent, assigning an expression to a variable of incompatible type. This commit updates the Relax well-formed checker to verify that the `StructInfo` of Relax variables accurately describes their contents.
The `StructInfoLCA` determines the lowest common ancestor between two
`StructInfo` annotations. This is primarily used in Relax to
determine the appropriate `StructInfo` annotation for a `relax::If`
node, given the `StructInfo` of each branch. Prior to this commit,
when determining the LCA of two `PrimStructInfo` annotations, the
`StructInfoLCA` function only inspected the datatype of
`PrimStructInfo` annotations, and did not check for known values. For
example, the LCA of `R.Prim(value=T.int64(128))` and
`R.Prim(value=T.int64(64))` is `R.Prim("int64")`, but was incorrectly
determined as `R.Prim(value=T.int64(128))` by the `StructInfoLCA`
function.
This commit updates `StructInfoLCA` to inspect the known values of a
`PrimStructInfo`, as well as the datatype.
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Rebased onto main to resolve conflicts in |
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cc @yongwww can you help to take a look |
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In Relax, both the variable and the expression in a
VarBindingmay containStructInfoannotations. Prior to this commit, theseStructInfoannotations could be inconsistent, assigning an expression to a variable of incompatible type.This commit updates the Relax well-formed checker to verify that the
StructInfoof Relax variables accurately describes their contents.