[clang] [clang-tools-extra] [clang] Complete fields in __builtin_offsetof designators (PR #195126)

[Jakob Linke via cfe-commits]

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@@ -1670,6 +1675,11 @@ bool ResultBuilder::IsMember(const NamedDecl *ND) const {
          isa<ObjCPropertyDecl>(ND);
 }
 
+bool ResultBuilder::IsField(const NamedDecl *ND) const {
+  ND = ND->getUnderlyingDecl();
+  return isa<FieldDecl>(ND) || isa<IndirectFieldDecl>(ND);
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schuay wrote:

Good suggestion. After adding the bit-field filter (the other review comment), the function needs to inspect the cast result to call `isBitField()`, so I switched it to `dyn_cast` instead. Let me know if you'd prefer a different shape.

https://github.com/llvm/llvm-project/pull/195126