change Target.getInstructionsByEnumValue to return a reference
to a vector that CGT stores instead of synthesizing it on every 
call.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98910 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/EDEmitter.cpp b/utils/TableGen/EDEmitter.cpp
index 2149410..f83ab48 100644
--- a/utils/TableGen/EDEmitter.cpp
+++ b/utils/TableGen/EDEmitter.cpp
@@ -549,8 +549,8 @@
 /// @arg target     - The CodeGenTarget to use as a source of instructions
 static void populateInstInfo(CompoundConstantEmitter &infoArray,
                              CodeGenTarget &target) {
-  std::vector<const CodeGenInstruction*> numberedInstructions;
-  target.getInstructionsByEnumValue(numberedInstructions);
+  const std::vector<const CodeGenInstruction*> &numberedInstructions =
+    target.getInstructionsByEnumValue();
   
   unsigned int index;
   unsigned int numInstructions = numberedInstructions.size();