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Geza Lore
3069860fdf
Fixes #3872. Testing this is a bit tricky, as the front-end fixes up the operand widths in shifts to match, and we need V3Const to introduce a mismatched one by reducing `4'd2 ** x` (with x being 2 2-bit wide signal) to `4'd1 << x`, but t_dfg_peephole runs with V3Const disabled exactly because it makes it hard to write tests. Rather than fixing this one case in V3Const (which we should do systematically at some point), I fixed DFG to accept these just in case V3Const generates more of them. The assertions were there only because of paranoia (as I thought these were not possible inputs), the code otherwise works.