[clang] Add fine-grained `__has_feature()` cutout (PR #170822)

[Florian Mayer via cfe-commits]

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@@ -3973,6 +3980,10 @@ bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
     Opts.PIE = Args.hasArg(OPT_pic_is_pie);
     parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
                         Diags, Opts.Sanitize);
+    parseSanitizerKinds(
+        "-fsanitize-ignore-for-ubsan-feature=",
+        Args.getAllArgValues(OPT_fsanitize_ignore_for_ubsan_feature_EQ), Diags,
+        Opts.UBSanFeatureSuppressedSanitize);
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fmayer wrote:

I would use consistent terminology regarding `ignore` or `suppress` for the flag and the opt

https://github.com/llvm/llvm-project/pull/170822