GitLab

Make sure that when a pointer value is live across a function
call, we save it as a pointer.  (And similarly a uintptr
live across a function call should not be saved as a pointer.)

Add a nasty test case.

This is probably what is preventing the merge from master
to dev.ssa.  Signs point to something like this bug happening
in mallocgc.

Change-Id: Ib23fa1251b8d1c50d82c6a448cb4a4fc28219029
Reviewed-on: https://go-review.googlesource.com/16830


Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>