[llvm-branch-commits] [clang] [clang] Define ptrauth_sign_constant builtin. (PR #93904)

[Daniil Kovalev via llvm-branch-commits]

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@@ -2030,8 +2030,26 @@ bool Sema::checkConstantPointerAuthKey(Expr *Arg, unsigned &Result) {
   return false;
 }
 
+static std::pair<const ValueDecl *, CharUnits>
+findConstantBaseAndOffset(Sema &S, Expr *E) {
+  // Must evaluate as a pointer.
+  Expr::EvalResult result;
+  if (!E->EvaluateAsRValue(result, S.Context) ||
+      !result.Val.isLValue())
+    return std::make_pair(nullptr, CharUnits());
+
+  // Base must be a declaration and can't be weakly imported.
+  auto baseDecl =
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kovdan01 wrote:

```suggestion
  const auto *BaseDecl =
```

https://github.com/llvm/llvm-project/pull/93904