The name -gnone was chosen by analogy with -O and -Onone. Like -O/-Onone,
the last option on the command line wins.
The immediate use case for this is because we want to be able to run the
tests with -g injected into every command line, but some tests will fail
when debug info is included. Those particular tests can be explicitly marked
-gnone.
rdar://problem/18636307
Swift SVN r22777
This matches Clang's behavior, though this implementation does not check
that it's actually on a platform that uses dsymutil.
<rdar://problem/16012971>
Swift SVN r20529
Most of the tests just got moved to swiftc, but some of them were
duplicated to apply to both swiftc and swift. A handful still use the
existing 'swift' because they are for the existing '-i' syntax.
Note: this means config.swift_driver now uses the staging symlink
'swifti'. The only thing preventing us from dropping the 'i' and getting
rid of the old interface is that Xcode hasn't moved to swiftc yet
<rdar://problem/17769327>.
Swift SVN r20467
These tests currently only exercise the "swift_driver -driver-print-actions"
functionality, but at this point that is the only part of the driver which is
reasonably testable without the expectation that tests will break as output
formats change.
Swift SVN r10934
