cmd/compile/internal/liveness: remove excess bits for stackmap
ArgWidth() already includes the stack space required for
input parameters and return values, so their offset will
not exceed the value of ArgWidth(), so there is no need
to double it.
Change-Id: I10fde7afbf2a5714b5142075c2116af14debc7e8
GitHub-Last-Rev:
eaf3fd5eb86ed1d968a6d5962c71ee3144424598
GitHub-Pull-Request: golang/go#60591
Reviewed-on: https://go-review.googlesource.com/c/go/+/500675
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: guangyuan zhou <zhouguangyuan@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>