[clang] [compiler-rt] [UBSan] Add check that detects division by zero for fixed-point types (PR #165181)

[Vitaly Buka via cfe-commits]

================
@@ -66,6 +66,10 @@ FEATURE(array_bounds_sanitizer,
         LangOpts.Sanitize.has(SanitizerKind::ArrayBounds))
 FEATURE(enum_sanitizer,
         LangOpts.Sanitize.has(SanitizerKind::Enum))
+FEATURE(fixed_point_divide_by_zero_sanitizer,
----------------
vitalybuka wrote:

 we don't do these any more?
and suppose to use ' Builder.defineMacro("__SANITIZE_HWADDRESS__");' ?

@pcc @fmayer

https://github.com/llvm/llvm-project/pull/165181