C1X: implement generic selections

As an extension, generic selection support has been added for all
supported languages.  The syntax is the same as for C1X.

llvm-svn: 129554
diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index 92292ce..dbcb7e4 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -434,6 +434,18 @@
   ID.AddBoolean(S->isConstQualAdded());
 }
 
+void StmtProfiler::VisitGenericSelectionExpr(GenericSelectionExpr *S) {
+  VisitExpr(S);
+  for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
+    QualType T = S->getAssocType(i);
+    if (T.isNull())
+      ID.AddPointer(0);
+    else
+      VisitType(T);
+    VisitExpr(S->getAssocExpr(i));
+  }
+}
+
 static Stmt::StmtClass DecodeOperatorCall(CXXOperatorCallExpr *S,
                                           UnaryOperatorKind &UnaryOp,
                                           BinaryOperatorKind &BinaryOp) {