From: David Greene <greened@obbligato.org>
Date: Fri, 29 Jul 2011 19:07:14 +0000 (+0000)
Subject: [AVX] Make StringInit Unique
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=d0e9d04ab04d862392cbc84543ad9d77c58eb966;p=oota-llvm.git

[AVX] Make StringInit Unique

Use a StringMap to ensure the StringInits are unique.  This is
especially important for AVX where we will have many smallish
strings representing instruction prefixes, suffixes and the like.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136491 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/utils/TableGen/Record.cpp b/utils/TableGen/Record.cpp
index 54edfe5ea8f..ee5db4713dc 100644
--- a/utils/TableGen/Record.cpp
+++ b/utils/TableGen/Record.cpp
@@ -21,6 +21,7 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringMap.h"
 
 using namespace llvm;
 
@@ -565,7 +566,12 @@ IntInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) const {
 }
 
 const StringInit *StringInit::get(const std::string &V) {
-  return new StringInit(V);
+  typedef StringMap<StringInit *> Pool;
+  static Pool ThePool;
+
+  StringInit *&I = ThePool[V];
+  if (!I) I = new StringInit(V);
+  return I;
 }
 
 const CodeInit *CodeInit::get(const std::string &V) {