[clang][Interp] Call move function for certain primitive types (#104437)

Author: tbaederr

clang/lib/AST/Interp/Descriptor.cpp

@@ -284,6 +284,14 @@ static BlockDtorFn getDtorPrim(PrimType Type) {
 }
 
 static BlockMoveFn getMovePrim(PrimType Type) {
+  if (Type == PT_Float)
+    return moveTy<PrimConv<PT_Float>::T>;
+  if (Type == PT_IntAP)
+    return moveTy<PrimConv<PT_IntAP>::T>;
+  if (Type == PT_IntAPS)
+    return moveTy<PrimConv<PT_IntAPS>::T>;
+  if (Type == PT_MemberPtr)
+    return moveTy<PrimConv<PT_MemberPtr>::T>;
   COMPOSITE_TYPE_SWITCH(Type, return moveTy<T>, return nullptr);
 }
 

clang/test/AST/Interp/lifetimes.cpp

@@ -60,3 +60,11 @@ namespace MoveFnWorks {
   }
   static_assert(dtor_calls_dtor(), "");
 }
+
+namespace PrimitiveMoveFn {
+  /// This used to crash.
+  void test() {
+    const float y = 100;
+    const float &x = y;
+  }
+}