[Relax][Analysis] Handle recursive functions in CollectVarUsage #17224
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Prior to this commit, the `relax::analysis::CollectVarUsage` utility treated a local function definition as in-scope after visiting the body of the local function. As a result, recursive calls from a local function were incorrectly identified as calls to an undefined variable. This commit updates the `CollectVarUsage` to treat a local function definition as in-scope when inspecting the function body. This change is similar to the change made for structural equality in apache#16756.
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Prior to this commit, the
relax::analysis::CollectVarUsageutility treated a local function definition as in-scope after visiting the body of the local function. As a result, recursive calls from a local function were incorrectly identified as calls to an undefined variable.This commit updates the
CollectVarUsageto treat a local function definition as in-scope when inspecting the function body. This change is similar to the change made for structural equality in #16756.