PR30735 reports an issue where llvm-cov hangs with a worker thread
waiting on a condition, and the main thread waiting to join() the
workers. While this doesn't appear to be a bug in llvm-cov or the
ThreadPool implementation, it would be helpful to disable the use of
threading in the llvm-cov tests where no test coverage is added.
More context: https://bugs.llvm.org/show_bug.cgi?id=30735
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@307610 91177308-0d34-0410-b5e6-96231b3b80d8
This commit makes llvm-cov avoid showing 0% (0/0) coverage for things
like file function coverage, etc. in reports and HTML output. This can happen
for files like headers that have macros but no functions. This commit makes
llvm-cov report - (0/0) instead.
rdar://29246480
Differential Revision: https://reviews.llvm.org/D26615
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287539 91177308-0d34-0410-b5e6-96231b3b80d8
