[Relax] Normalize use of void-type variable to inline R.tuple() #16658
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This will be good for avoiding the tricky situation that arises with #16641, mainly where it can be a problem to omit the binding of a unit-type variable if the var is used later. I think it's pretty harmless to simply inline all unit values.
This is a follow-up commit to apache#16641. While parsing of relax expressions without a variable binding could be implemented at that point (e.g. `R.assert_op(condition)` instead of `dummy_var = R.assert_op(condition)`), the corresponding printing changes could not. This was because a variable that satisfies `relax::HasVoidStructInfo(var)` could still be used later in the function, and removing its binding would result in use of an undefined variable. This commit normalizes use of void-type variables to an in-line `R.tuple()`. This simplifies the relax function, and also allows the binding of void-type variables to be hidden.
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Agreed, and it matches our existing behavior for things like |
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…he#16658) * [Relax] Normalize use of void-type variable to inline R.tuple() This is a follow-up commit to apache#16641. While parsing of relax expressions without a variable binding could be implemented at that point (e.g. `R.assert_op(condition)` instead of `dummy_var = R.assert_op(condition)`), the corresponding printing changes could not. This was because a variable that satisfies `relax::HasVoidStructInfo(var)` could still be used later in the function, and removing its binding would result in use of an undefined variable. This commit normalizes use of void-type variables to an in-line `R.tuple()`. This simplifies the relax function, and also allows the binding of void-type variables to be hidden. * Fix breakage in unit tests
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This is a follow-up commit to #16641. While parsing of relax expressions without a variable binding could be implemented at that point (e.g.
R.assert_op(condition)instead ofdummy_var = R.assert_op(condition)), the corresponding printing changes could not. This was because a variable that satisfiesrelax::HasVoidStructInfo(var)could still be used later in the function, and removing its binding would result in use of an undefined variable.This commit normalizes use of void-type variables to an in-line
R.tuple(). This simplifies the relax function, and also allows the binding of void-type variables to be hidden.