There are often many values to clobber.
Allow passing them all in at once.
The goal is increased rule readability.
As a bonus, it shrinks cmd/compile by ~97k, almost half a percent.
Package SSA requires 1.2% less memory to compile.
The single-line changes were make via regex,
and the remaining multi-line clobbers were manually combined.
Passes toolstash-check -all.
Change-Id: Ib310e9265d3616211f8192c9040b4c8933824d19
Reviewed-on: https://go-review.googlesource.com/c/go/+/220691 Reviewed-by: Michael Munday <mike.munday@ibm.com>