cmd/compile: test to ensure we guard GOAMD64>v1 instructions
When compiling with GOAMD64=v1, clobber all the >v1 instructions
with faulting instructions. Run the binary with the corresponding
feature flags off. We shouldn't try to execute any of the clobbered
instructions.
Change-Id: I295acaf9fd0eafd037192aa6f933365c794cc76e
Reviewed-on: https://go-review.googlesource.com/c/go/+/352831
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Keith Randall <khr@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>