commit 8e53eb937b67fe74bcc9a2071d25c0397101637f
author Alan Donovan <adonovan@google.com> Wed Jul 20 15:03:06 2016 -0400
committer Alan Donovan <adonovan@google.com> Wed Oct 19 17:50:59 2016 +0000
tree 440066228e78e4dcaae6160ce0a320b43742ad58
parent 860883f6daa98743766727e8f7e4305661fa2748

go/ssa: support custom TestMain functions in test packages

Supporting user-defined TestMain functions requires that we generate a
"testmain" package for each testable package, rather than a single one
for the entire program.  This entails these API changes:

1. (*ssa.Program).{CreateTestMainPackage,FindTests} both now
   accept only a single package.  Existing clients that pass them
   multiple packages must call them from a loop.

2. (*ssa.Program).FindTests returns an additional result, the the
   optional TestMain *ssa.Function.  Existing clients may discard it.

Also:
- Test the new logic using the SSA interpreter
- add ssautil.MainPackages helper
- callgraph: allow multiple main packages, and analyze them all
- ssadump -run: allow multiple main/test packages, and run each in a new interpreter
- minor simplifications to some callers (e.g. guru)

Fixes golang/go#9553

Change-Id: Ia7de9bd27448fb08b8d172ba5cdbcf37a762b7a0
Reviewed-on: https://go-review.googlesource.com/25102
Reviewed-by: Robert Griesemer <gri@golang.org>