[clang] [ubsan] Connect -fsanitize-skip-hot-cutoff to LowerAllowCheckPass<cutoffs> (PR #124857)

[Thurston Dang via cfe-commits]

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@@ -3614,29 +3614,35 @@ void CodeGenFunction::EmitCheck(
   llvm::Value *RecoverableCond = nullptr;
   llvm::Value *TrapCond = nullptr;
   bool NoMerge = false;
+  // Expand checks into:
+  //   (Check1 || !allow_ubsan_check) && (Check2 || !allow_ubsan_check) ...
+  // We need separate allow_ubsan_check intrinsics because they have separately
+  // specified cutoffs.
+  // This expression looks expensive but will be simplified after
+  // LowerAllowCheckPass.
+  static const double SanitizerMaskCutoffsEps = 0.000000001f;
   for (auto &[Check, Ord] : Checked) {
+    llvm::Value *GuardedCheck = Check;
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thurstond wrote:

Check can't be modified because of the const type of the structured binding (`auto &[Check, Ord]`)


https://github.com/llvm/llvm-project/pull/124857