[SDAG] Don't insert the VRBase into a mapping from SDValues when the def

doesn't actually correspond to an SDValue at all. Fixes most of the
remaining asserts on out-of-range SDValue result numbers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213930 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/InstrEmitter.cpp

@@ -265,6 +265,9 @@ void InstrEmitter::CreateVirtualRegisters(SDNode *Node,
       MIB.addReg(VRBase, RegState::Define);
     }
 
+    // If this def corresponds to a result of the SDNode insert the VRBase into
+    // the lookup map.
+    if (i < NumResults) {
       SDValue Op(Node, i);
       if (IsClone)
         VRBaseMap.erase(Op);
@@ -272,6 +275,7 @@ void InstrEmitter::CreateVirtualRegisters(SDNode *Node,
       (void)isNew; // Silence compiler warning.
       assert(isNew && "Node emitted out of order - early");
     }
+  }
 }
 
 /// getVR - Return the virtual register corresponding to the specified result