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Re: Issue with find_tail_calls


    >   	      if (!is_gimple_reg_type (TREE_TYPE (param))
    > ! 		  || !tree_ssa_useless_type_conversion_1 (TREE_TYPE (param),
    > ! 							  TREE_TYPE (arg)))

    Seems reasonable.  These are the conversions we strip across
    move statements.  Which is about the same for what we'd want
    across a return.

What about the other cases where this would apply?  I can't think of any
cases where checking the lang hook directly is correct.  Can you?


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