[clang] [sanitizer] Add plumbing for -fsanitize-add-pseudo-functions and partly replace '-mllvm -array-bounds-pseudofn' (PR #138577)

[Florian Mayer via cfe-commits]

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@@ -2533,6 +2533,30 @@ def fno_sanitize_merge_handlers : Flag<["-"], "fno-sanitize-merge">, Group<f_cla
                         Alias<fno_sanitize_merge_handlers_EQ>, AliasArgs<["all"]>,
                         Visibility<[ClangOption, CLOption]>,
                         HelpText<"Do not allow compiler to merge handlers for any sanitizers">;
+def fsanitize_add_pseudo_functions_EQ
+    : CommaJoined<["-"], "fsanitize-add-pseudo-functions=">,
+      Group<f_clang_Group>,
+      HelpText<"Add pseudo-functions to checks for specified sanitizers">;
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fmayer wrote:

This is a bit confusing because we currently only support one

https://github.com/llvm/llvm-project/pull/138577