Support unary type traits in a scalar context. Not that I've actually seen

this construct, but might as well for completeness.

llvm-svn: 91071

clang/lib/CodeGen/CGExprScalar.cpp

@@ -263,6 +263,10 @@ public:
     CGF.EmitCXXDeleteExpr(E);
     return 0;
   }
+  Value *VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) {
+    return llvm::ConstantInt::get(Builder.getInt1Ty(),
+                                  E->EvaluateTrait(CGF.getContext()));
+  }
 
   Value *VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *E) {
     // C++ [expr.pseudo]p1:

clang/test/CodeGenCXX/unary-type-trait.cpp

@@ -0,0 +1,3 @@
+// RUN: clang-cc -emit-llvm-only -verify %s
+
+bool a() { return __is_pod(int); }