cde977c23c
Load-and-sign-extend opcodes were being generated in the wrong block, leading to having more than one memory variable live at once. Fix the rules + add a test. Change-Id: Iadf80e55ea901549c15c628ae295c2d0f1f64525 Reviewed-on: https://go-review.googlesource.com/14591 Reviewed-by: Todd Neal <todd@tneal.org> Run-TryBot: Todd Neal <todd@tneal.org>
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