[clang] [sanitizer] Parse weighted sanitizer args and -fno-sanitize-top-hot (PR #121619)

[Vitaly Buka via cfe-commits]

================
@@ -44,6 +92,19 @@ void clang::serializeSanitizerSet(SanitizerSet Set,
 #include "clang/Basic/Sanitizers.def"
 }
 
+void clang::serializeSanitizerMaskCutoffs(
+    const SanitizerMaskCutoffs &Cutoffs, SmallVectorImpl<std::string> &Values) 
{
+#define SANITIZER(NAME, ID)                                                    
\
+  if (auto C = Cutoffs[SanitizerKind::SO_##ID]) {                              
\
+    llvm::APFloat F(*C);                                                       
\
----------------
vitalybuka wrote:

I don't like all format options.
Maybe better just to switch to int of (1/1000000), like we do in llvm?

https://github.com/llvm/llvm-project/pull/121619
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