From 637b4ffa01f42a6df598d4fc367d645a600128e1 Mon Sep 17 00:00:00 2001
From: David Greene <greened@obbligato.org>
Date: Fri, 29 Jul 2011 19:07:15 +0000
Subject: [PATCH] [AVX] Make CodeInit Unique

Use a StringMap to ensure CodeInits are unique and created only
once.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136492 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/Record.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/utils/TableGen/Record.cpp b/utils/TableGen/Record.cpp
index ee5db4713dc..133a1581c0e 100644
--- a/utils/TableGen/Record.cpp
+++ b/utils/TableGen/Record.cpp
@@ -575,7 +575,12 @@ const StringInit *StringInit::get(const std::string &V) {
 }
 
 const CodeInit *CodeInit::get(const std::string &V) {
-  return new CodeInit(V);
+  typedef StringMap<CodeInit *> Pool;
+  static Pool ThePool;
+
+  CodeInit *&I = ThePool[V];
+  if (!I) I = new CodeInit(V);
+  return I;
 }
 
 const ListInit *ListInit::get(ArrayRef<const Init *> Range, RecTy *EltTy) {