aravind
2137af76be
This diff fixes a bug in shuffleArgs when there are three register arguments in a cycle, and one of them needs a zero extend. Assume the shuffle that needs to be performed is rdi -> rsi, rsi -> rdx, rdx -> rdi. doRegMoves() determines the sequence of moves to be: xchg rdx, rsi xchg rsi, rdi Assume also that the second dest reg (rsi) needs a zero extend. The current implementatin will spit out the code sequence: xchg %rdx, %rsi movzbl %sil, %esi xchg %rsi, %rdi movzbl %sil, $esi Basically, the problem is that if a move sequence uses two xchg's for a cycle of three registers, we should not perform the zero extending (and address-lea) till both the exchanges are done.
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