[dev.typeparams] cmd/compile: add test for number of instantiations

Add a test for a generic sort function, operating on several different
pointer types (across two packages), so they should all share the same
shape-based instantiation. Actually check that only one instantiation of
Sort is created using 'go tool nm', and also check that the output is
correct.

In order to do the test on the executable using 'go nm', added this as a
'go test' in cmd/compile/internal/test.

Added the genembed.go test that I meant to include with a previous CL.

Change-Id: I9962913c2f1809484c2b1dfef3b07e4c8770731c
Reviewed-on: https://go-review.googlesource.com/c/go/+/354696
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
5 files changed
tree: c3e63c2c049b31040b21539882c7b55ebe0c2e54
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. codereview.cfg
  12. CONTRIBUTING.md
  13. CONTRIBUTORS
  14. LICENSE
  15. PATENTS
  16. README.md
  17. SECURITY.md
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