cmd/compile: fix load-combining
Make sure symbol gets carried along by load-combining rule. Add the new load into the right block where we know that mem is live. Use auxInt field to carry i along instead of an explicit ADDQ. Incorporate LEA ops into MOVBQZX and friends. Change-Id: I587f7c6120b98fd2a0d48ddd6ddd13345d4421b4 Reviewed-on: https://go-review.googlesource.com/20732 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:Todd Neal <todd@tneal.org>
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