search for: r321871

...e suggested ARMAsmBackend cleanup has already been implemented and committed.[r321692](http://reviews.llvm.org/rL321692), [r321707](http://reviews.llvm.org/rL321707). * A multi-threaded implementation of llvm-cov's prepareFileReports method results in huge speed improvements for large inputs. [r321871](http://reviews.llvm.org/rL321871). ## Clang commits * Clang will use a recent addition to the libLLVMOption API to suggest correctly spelled driver options when an unrecognised argument is given. [r321917](http://reviews.llvm.org/rL321917). * The `-Wtautological-constant-compare` warning has in...