cmd/compile: refactor liveness analysis for moving to SSA In the SSA CFG, TEXT, RET, and JMP instructions correspond to Blocks, not Values. Rework liveness analysis so that progeffects only cares about Progs that result from Values, and handle Blocks separately. Passes toolstash-check -all. Change-Id: Ic23719c75b0421fdb51382a08dac18c3ba042b32 Reviewed-on: https://go-review.googlesource.com/38085 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
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