[clang] [Clang] Add wraps attribute (for granular integer overflow handling) (PR #86618)

[Erich Keane via cfe-commits]

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@@ -147,6 +147,15 @@ struct BinOpInfo {
       return UnOp->getSubExpr()->getType()->isFixedPointType();
     return false;
   }
+
+  /// Does the BinaryOperator have the wraps attribute?
+  /// If so, we can ellide overflow sanitizer checks.
+  bool oneOfWraps() const {
+    const Type *TyPtr = E->getType().getTypePtrOrNull();
+    if (TyPtr)
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erichkeane wrote:

Also would be simplified with the above suggestion.  Also, since `QualType` has an operator -> and *, we typically don't fall to `Type*` unless we REALLY have to.

https://github.com/llvm/llvm-project/pull/86618