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Summary: Introduce ToolChain::getSupportedSanitizers() that would return the set of sanitizers available on given toolchain. By default, these are sanitizers which don't necessarily require runtime support (i.e. set from -fsanitize=undefined-trap). Sanitizers (ASan, DFSan, TSan, MSan etc.) which cannot function without runtime library are marked as supported only on platforms for which we actually build these runtimes. This would allow more fine-grained checks in the future: for instance, we have to restrict availability of -fsanitize=vptr to Mac OS 10.9+ (PR23539) Update test cases accrodingly: add tests for certain unsupported configurations, remove test cases for -fsanitize=vptr + PS4 integration, as we don't build the runtime for PS4 at the moment. Test Plan: regression test suite Reviewers: pcc Subscribers: cfe-commits, filcab, eugenis, thakis, kubabrecka, emaste, rsmith Differential Revision: http://reviews.llvm.org/D10467 llvm-svn: 239953