[clang][Interp] Handle ObjCBoolLiteralExprs

Emit them just like the others, but these are integer typed.

clang/lib/AST/Interp/ByteCodeExprGen.cpp

@@ -1985,6 +1985,15 @@ bool ByteCodeExprGen<Emitter>::VisitChooseExpr(const ChooseExpr *E) {
   return this->delegate(E->getChosenSubExpr());
 }
 
+template <class Emitter>
+bool ByteCodeExprGen<Emitter>::VisitObjCBoolLiteralExpr(
+    const ObjCBoolLiteralExpr *E) {
+  if (DiscardResult)
+    return true;
+
+  return this->emitConst(E->getValue(), E);
+}
+
 template <class Emitter> bool ByteCodeExprGen<Emitter>::discard(const Expr *E) {
   if (E->containsErrors())
     return false;

clang/lib/AST/Interp/ByteCodeExprGen.h

@@ -110,6 +110,7 @@ public:
   bool VisitSizeOfPackExpr(const SizeOfPackExpr *E);
   bool VisitGenericSelectionExpr(const GenericSelectionExpr *E);
   bool VisitChooseExpr(const ChooseExpr *E);
+  bool VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *E);
 
 protected:
   bool visitExpr(const Expr *E) override;

clang/test/AST/Interp/c.c

@@ -7,6 +7,10 @@ typedef __INTPTR_TYPE__ intptr_t;
 typedef __PTRDIFF_TYPE__ ptrdiff_t;
 
 _Static_assert(1, "");
+
+_Static_assert(__objc_yes, "");
+_Static_assert(!__objc_no, "");
+
 _Static_assert(0 != 1, "");
 _Static_assert(1.0 == 1.0, ""); // pedantic-ref-warning {{not an integer constant expression}} \
                                 // pedantic-expected-warning {{not an integer constant expression}}

clang/test/AST/Interp/literals.cpp

@@ -27,6 +27,9 @@ static_assert(number != 10, ""); // expected-error{{failed}} \
                                  // expected-note{{evaluates to}} \
                                  // ref-note{{evaluates to}}
 
+static_assert(__objc_yes, "");
+static_assert(!__objc_no, "");
+
 constexpr bool b = number;
 static_assert(b, "");
 constexpr int one = true;

clang/test/Sema/objc-bool-constant-conversion.m

@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 %s -verify -fsyntax-only
+// RUN: %clang_cc1 %s -verify -fsyntax-only -fexperimental-new-constant-interpreter
 
 typedef signed char BOOL;
 #define YES __objc_yes