Instrument bit field and unaligned accesses for TSAN.

gcc/ChangeLog:
2015-01-02  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        Instrument bit field and unaligned accesses for TSAN.
        * sanitizer.def (BUILT_IN_TSAN_READ_RANGE): New built-in function.
        (BUILT_IN_TSAN_WRITE_RANGE): New built-in function.
        * tsan.c (instrument_expr): Handle COMPONENT_REF and BIT_FIELD_REF.
        Use BUILT_IN_TSAN_READ_RANGE and BUILT_IN_TSAN_WRITE_RANGE for
        unaligned memory regions.

testsuite/ChangeLog:
2015-01-02  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * c-c++-common/tsan/bitfield_race.c: New testcase.
        * g++.dg/tsan/aligned_vs_unaligned_race.C: Fixed.

From-SVN: r219150