[llvm-bugs] [Bug 41310] New: Set preprocessor flag for Undefined Behavior Sanitizer

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https://bugs.llvm.org/show_bug.cgi?id=41310

            Bug ID: 41310
           Summary: Set preprocessor flag for Undefined Behavior Sanitizer
           Product: compiler-rt
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: ubsan
          Assignee: unassignedbugs at nondot.org
          Reporter: eugene.zelenko at gmail.com
                CC: llvm-bugs at lists.llvm.org

Currently Address Sanitizer sets __SANITIZE_ADDRESS__ preprocessor flag. I
think will be good idea to do this for other sanitizers for consistency,
particularly for Undefined Behavior Sanitizer.

Background: I got -Wdisabled-optimization warnings when compiled my project
with  Undefined Behavior Sanitizer with GCC 5.4. I'd like to suppress warnings
in individual file with #pragma only for Undefined Behavior Sanitizer
instrumentation.

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