Index: clang/lib/AST/Interp/ByteCodeExprGen.h
===================================================================
--- clang/lib/AST/Interp/ByteCodeExprGen.h
+++ clang/lib/AST/Interp/ByteCodeExprGen.h
@@ -90,6 +90,8 @@
   bool VisitArrayInitIndexExpr(const ArrayInitIndexExpr *E);
   bool VisitOpaqueValueExpr(const OpaqueValueExpr *E);
   bool VisitAbstractConditionalOperator(const AbstractConditionalOperator *E);
+  bool VisitStringLiteral(const StringLiteral *E);
+  bool VisitCharacterLiteral(const CharacterLiteral *E);
 
 protected:
   bool visitExpr(const Expr *E) override;
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===================================================================
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -433,6 +433,18 @@
   return true;
 }
 
+template <class Emitter>
+bool ByteCodeExprGen<Emitter>::VisitStringLiteral(const StringLiteral *E) {
+  unsigned StringIndex = P.createGlobalString(E);
+  return this->emitGetPtrGlobal(StringIndex, E);
+}
+
+template <class Emitter>
+bool ByteCodeExprGen<Emitter>::VisitCharacterLiteral(
+    const CharacterLiteral *E) {
+  return this->emitConst(E, E->getValue());
+}
+
 template <class Emitter> bool ByteCodeExprGen<Emitter>::discard(const Expr *E) {
   OptionScope<Emitter> Scope(this, /*NewDiscardResult=*/true);
   return this->Visit(E);
Index: clang/test/AST/Interp/literals.cpp
===================================================================
--- clang/test/AST/Interp/literals.cpp
+++ clang/test/AST/Interp/literals.cpp
@@ -309,3 +309,37 @@
 
   static_assert(0.0f == -0.0f, "");
 };
+
+namespace strings {
+  constexpr const char *S = "abc";
+  static_assert(S[0] == 97, "");
+  static_assert(S[1] == 98, "");
+  static_assert(S[2] == 99, "");
+  static_assert(S[3] == 0, "");
+
+  static_assert("foobar"[2] == 'o', "");
+  static_assert(2["foobar"] == 'o', "");
+
+  constexpr const wchar_t *wide = L"bar";
+  static_assert(wide[0] == L'b', "");
+
+  constexpr const char32_t *u32 = U"abc";
+  static_assert(u32[1] == U'b', "");
+
+  constexpr char32_t c = U'\U0001F60E';
+  static_assert(c == 0x0001F60EL, "");
+
+  constexpr char k = -1;
+  static_assert(k == -1, "");
+
+  static_assert('\N{LATIN CAPITAL LETTER E}' == 'E', "");
+  static_assert('\t' == 9, "");
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmultichar"
+  constexpr int mc = 'abc';
+  static_assert(mc == 'abc', "");
+  __WCHAR_TYPE__ wm = L'abc'; // ref-error{{wide character literals may not contain multiple characters}} \
+                              // expected-error{{wide character literals may not contain multiple characters}}
+#pragma clang diagnostic pop
+};
Index: clang/test/Lexer/char-escapes.c
===================================================================
--- clang/test/Lexer/char-escapes.c
+++ clang/test/Lexer/char-escapes.c
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s
+// RUN: %clang_cc1 -fsyntax-only -pedantic -fexperimental-new-constant-interpreter -verify %s
 
 int test['\\' == 92 ? 1 : -1];
 int test['\"' == 34 ? 1 : -1];