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PR sanitizer/65400 * ipa-split.c (find_return_bb): Allow TSAN_FUNC_EXIT internal call in the return bb. (find_split_points): Add RETURN_BB argument, don't call find_return_bb. (split_function): Likewise. Add ADD_TSAN_FUNC_EXIT argument, if true append TSAN_FUNC_EXIT internal call after the call to the split off function. (execute_split_functions): Call find_return_bb here. Don't optimize if TSAN_FUNC_EXIT is found in unexpected places. Adjust find_split_points and split_function calls. * c-c++-common/tsan/pr65400-1.c: New test. * c-c++-common/tsan/pr65400-2.c: New test. From-SVN: r221508
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