testsuite location for adding new tests

[Le-Chun Wu]

Hi,

As part of our thread safety annotation/analysis effort, we created
about 17 new test cases that we would like to add to the gcc
testsuite. Should we create a new sub-directory under testsuite/g++.dg
(say, for example, g++.dg/thread-ann)? Or should we add them to an
existing sub-dir, e.g. testsuite/g++.dg/warn? (Some of the test cases
would cause the compiler to emit thread safety warning messages, but
some of them are "good" cases that no warning should be generated. So
we are not sure if they should all go to g++.dg/warn.) Thanks,

Le-chun