[clang] [clang] Implement a bitwise_copyable builtin type trait. (PR #86512)

[Haojian Wu via cfe-commits]

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@@ -2667,6 +2667,29 @@ bool QualType::isTriviallyCopyableType(const ASTContext &Context) const {
                                      /*IsCopyConstructible=*/false);
 }
 
+bool QualType::isBitwiseCopyableType(const ASTContext & Context) const {
+  QualType CanonicalType = getCanonicalType();
+  if (CanonicalType->isIncompleteType() || CanonicalType->isDependentType())
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hokein wrote:

Other traits (see `isTriviallyCopyableTypeImpl`) do the similar things for incomplete and dependent types, we follow what they did in this type trait.

https://github.com/llvm/llvm-project/pull/86512