[Bug sanitizer/58465] TSan deadlock in a single-threaded program

[oleg at smolsky dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58465

--- Comment #1 from Oleg Smolsky <oleg at smolsky dot net> ---
I wonder if I just need to merge this:
    http://llvm.org/viewvc/llvm-project?view=revision&revision=187978