On 10/20/2015 11:37 PM, David Blaikie wrote:
On Tue, Oct 20, 2015 at 2:24 PM, Tobias Grosser via cfe-commits <cfe-commits@lists.llvm.org <mailto:cfe-commits@lists.llvm.org>> wrote: On 10/20/2015 02:56 PM, Angel Garcia Gomez via cfe-commits wrote: Author: angelgarcia Date: Tue Oct 20 07:56:27 2015 New Revision: 250824 URL: http://llvm.org/viewvc/llvm-project?rev=250824&view=rev Log: Apply modernize-use-default to clang-tools-extra. Summary: Replace empty bodies of default constructors and destructors with '= default'. Hi Angel, this breaks http://lab.llvm.org:8011/builders/perf-x86_64-penryn-O3. The builder runs gcc 4.7.2. Ah, I was/am seeing this on the GDB 7.5 buildbot too - but figured it might be GCC 4.6, because I couldn't reproduce similar behavior in small samples on GCC 4.7, but it might be that I have GCC 4.7.3 locally, not 4.7.2... I think I have some ideas on how to fix this while keeping the change, but probably best to revert first, then try some things once we've got a reproduction locally to experiment with. (I think maybe Optional and possibly some other types are missing noexcept on their user-defined dtors, and GCC 4.old is assuming user defined dtors are noexcept(false), which is incorrect in C++11)
This seems to be the same issue (or at least a similar issue) to what we had seen in the Polly source. It would be interesting to understand what is going on.
Best, Tobias _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
