diff --git a/clang/lib/AST/Interp/ByteCodeExprGen.cpp b/clang/lib/AST/Interp/ByteCodeExprGen.cpp
--- a/clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ b/clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -958,6 +958,8 @@
 
 template <class Emitter>
 bool ByteCodeExprGen<Emitter>::VisitTypeTraitExpr(const TypeTraitExpr *E) {
+  if (DiscardResult)
+    return true;
   return this->emitConstBool(E->getValue(), E);
 }
 
diff --git a/clang/test/AST/Interp/literals.cpp b/clang/test/AST/Interp/literals.cpp
--- a/clang/test/AST/Interp/literals.cpp
+++ b/clang/test/AST/Interp/literals.cpp
@@ -895,6 +895,8 @@
     (void)5, (void)6;
 
     1 ? 0 : 1;
+    __is_trivial(int);
+
     return 0;
   }