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
@@ -562,18 +562,18 @@
 
 template <class Emitter>
 bool ByteCodeExprGen<Emitter>::VisitMemberExpr(const MemberExpr *E) {
-  if (DiscardResult)
-    return true;
-
   // 'Base.Member'
   const Expr *Base = E->getBase();
-  const ValueDecl *Member = E->getMemberDecl();
+
+  if (DiscardResult)
+    return this->discard(Base);
 
   if (!this->visit(Base))
     return false;
 
   // Base above gives us a pointer on the stack.
   // TODO: Implement non-FieldDecl members.
+  const ValueDecl *Member = E->getMemberDecl();
   if (const auto *FD = dyn_cast<FieldDecl>(Member)) {
     const RecordDecl *RD = FD->getParent();
     const Record *R = getRecord(RD);
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
@@ -876,7 +876,7 @@
 }
 static_assert(ignoredDecls() == 12, "");
 
-struct A{};
+struct A{ int a; };
 constexpr int ignoredExprs() {
   (void)(1 / 2);
   A a;
@@ -908,6 +908,19 @@
 constexpr int Value = Comma(5);
 static_assert(Value == 8, "");
 
+/// Ignored MemberExprs need to still evaluate the Base
+/// expr.
+constexpr A callme(int &i) {
+  ++i;
+  return A{};
+}
+constexpr int ignoredMemberExpr() {
+  int i = 0;
+  callme(i).a; // ref-warning {{result unused}} \
+               // expected-warning {{result unused}}
+  return i;
+}
+static_assert(ignoredMemberExpr() == 1, "");
 #endif
 
 namespace PredefinedExprs {