plug memory leak in LLParser::PerFunctionState::SetInstName() by deleting a value after replacing it

llvm-svn: 80790
diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index 9424328..3d2e312 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -1701,6 +1701,7 @@
       return P.Error(NameLoc, "instruction forward referenced with type '" + 
                      FI->second.first->getType()->getDescription() + "'");
     FI->second.first->replaceAllUsesWith(Inst);
+    delete FI->second.first;
     ForwardRefVals.erase(FI);
   }