Generate code to silence bogus GCC warnings.

llvm-svn: 24593
diff --git a/llvm/utils/TableGen/DAGISelEmitter.cpp b/llvm/utils/TableGen/DAGISelEmitter.cpp
index b7aef2c..fe815fb 100644
--- a/llvm/utils/TableGen/DAGISelEmitter.cpp
+++ b/llvm/utils/TableGen/DAGISelEmitter.cpp
@@ -1778,7 +1778,7 @@
         if (RR->isSubClassOf("Register")) {
           MVT::ValueType RVT = getRegisterValueType(RR, T);
           if (!InFlag) {
-            OS << "      SDOperand InFlag;\n";
+            OS << "      SDOperand InFlag = SDOperand(0,0);\n";
             InFlag = true;
           }
           if (HasChain) {