Give the longer name to the instruction that will probably be eliminated later

llvm-svn: 2581
diff --git a/llvm/lib/Transforms/Scalar/Reassociate.cpp b/llvm/lib/Transforms/Scalar/Reassociate.cpp
index 6eb275c..cb7f47b 100644
--- a/llvm/lib/Transforms/Scalar/Reassociate.cpp
+++ b/llvm/lib/Transforms/Scalar/Reassociate.cpp
@@ -169,9 +169,10 @@
       //
       Instruction *New = BinaryOperator::create(Instruction::Add,
                                                 Inst->getOperand(0), Inst,
-                                                Inst->getName()+".add");
+                                                Inst->getName());
       // Everyone now refers to the add instruction...
       Inst->replaceAllUsesWith(New);
+      Inst->setName(Inst->getOperand(1)->getName()+".neg");
       New->setOperand(1, Inst);        // Except for the add inst itself!
 
       BI = BB->getInstList().insert(BI+1, New)-1;  // Add to the basic block...