[clang-repl] Fix RuntimeInterfaceBuilder for 32-bit systems (#97071)

When generating runtime interface bindings, extend integral types to the
native register size rather than 64-bit per se

Fixes #94994

clang/lib/Interpreter/Interpreter.cpp

@@ -686,10 +686,12 @@ class InterfaceKindVisitor
   }
 
 private:
-  // Force cast these types to uint64 to reduce the number of overloads of
-  // `__clang_Interpreter_SetValueNoAlloc`.
+  // Force cast these types to the uint that fits the register size. That way we
+  // reduce the number of overloads of `__clang_Interpreter_SetValueNoAlloc`.
   void HandleIntegralOrEnumType(const Type *Ty) {
-    TypeSourceInfo *TSI = Ctx.getTrivialTypeSourceInfo(Ctx.UnsignedLongLongTy);
+    uint64_t PtrBits = Ctx.getTypeSize(Ctx.VoidPtrTy);
+    QualType UIntTy = Ctx.getBitIntType(/*Unsigned=*/true, PtrBits);
+    TypeSourceInfo *TSI = Ctx.getTrivialTypeSourceInfo(UIntTy);
     ExprResult CastedExpr =
         S.BuildCStyleCastExpr(SourceLocation(), TSI, SourceLocation(), E);
     assert(!CastedExpr.isInvalid() && "Cannot create cstyle cast expr");

clang/unittests/Interpreter/InterpreterTest.cpp

@@ -282,9 +282,6 @@ TEST_F(InterpreterTest, InstantiateTemplate) {
   EXPECT_EQ(42, fn(NewA.getPtr()));
 }
 
-// This test exposes an ARM specific problem in the interpreter, see
-// https://github.com/llvm/llvm-project/issues/94994.
-#ifndef __arm__
 TEST_F(InterpreterTest, Value) {
   std::vector<const char *> Args = {"-fno-sized-deallocation"};
   std::unique_ptr<Interpreter> Interp = createInterpreter(Args);
@@ -383,6 +380,5 @@ TEST_F(InterpreterTest, Value) {
   EXPECT_EQ(V9.getKind(), Value::K_PtrOrObj);
   EXPECT_TRUE(V9.isManuallyAlloc());
 }
-#endif /* ifndef __arm__ */
 
 } // end anonymous namespace