From b849203c948a2aa36f7f8b7679cc9351c1a92706 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Thu, 4 Jun 2015 07:40:12 +0000
Subject: [PATCH] [TableGen] Merge single prefix bit in RecordVal into
 PointerIntPair with Name to reduce memory usage.

llvm-svn: 239021
---
 llvm/include/llvm/TableGen/Record.h | 11 +++++------
 llvm/lib/TableGen/Record.cpp        | 10 +++++-----
 2 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/llvm/include/llvm/TableGen/Record.h b/llvm/include/llvm/TableGen/Record.h
index 43834cc3cc2d..d451a2a04f64 100644
--- a/llvm/include/llvm/TableGen/Record.h
+++ b/llvm/include/llvm/TableGen/Record.h
@@ -1113,22 +1113,21 @@ public:
 //===----------------------------------------------------------------------===//
 
 class RecordVal {
-  Init *Name;
+  PointerIntPair<Init *, 1, bool> NameAndPrefix;
   RecTy *Ty;
-  unsigned Prefix;
   Init *Value;
 
 public:
-  RecordVal(Init *N, RecTy *T, unsigned P);
-  RecordVal(const std::string &N, RecTy *T, unsigned P);
+  RecordVal(Init *N, RecTy *T, bool P);
+  RecordVal(const std::string &N, RecTy *T, bool P);
 
   const std::string &getName() const;
-  const Init *getNameInit() const { return Name; }
+  const Init *getNameInit() const { return NameAndPrefix.getPointer(); }
   std::string getNameInitAsString() const {
     return getNameInit()->getAsUnquotedString();
   }
 
-  unsigned getPrefix() const { return Prefix; }
+  bool getPrefix() const { return NameAndPrefix.getInt(); }
   RecTy *getType() const { return Ty; }
   Init *getValue() const { return Value; }
 
diff --git a/llvm/lib/TableGen/Record.cpp b/llvm/lib/TableGen/Record.cpp
index 4ca3e8d34c9f..a0b48ff54021 100644
--- a/llvm/lib/TableGen/Record.cpp
+++ b/llvm/lib/TableGen/Record.cpp
@@ -1532,20 +1532,20 @@ std::string DagInit::getAsString() const {
 //    Other implementations
 //===----------------------------------------------------------------------===//
 
-RecordVal::RecordVal(Init *N, RecTy *T, unsigned P)
-  : Name(N), Ty(T), Prefix(P) {
+RecordVal::RecordVal(Init *N, RecTy *T, bool P)
+  : NameAndPrefix(N, P), Ty(T) {
   Value = UnsetInit::get()->convertInitializerTo(Ty);
   assert(Value && "Cannot create unset value for current type!");
 }
 
-RecordVal::RecordVal(const std::string &N, RecTy *T, unsigned P)
-  : Name(StringInit::get(N)), Ty(T), Prefix(P) {
+RecordVal::RecordVal(const std::string &N, RecTy *T, bool P)
+  : NameAndPrefix(StringInit::get(N), P), Ty(T) {
   Value = UnsetInit::get()->convertInitializerTo(Ty);
   assert(Value && "Cannot create unset value for current type!");
 }
 
 const std::string &RecordVal::getName() const {
-  return cast<StringInit>(Name)->getValue();
+  return cast<StringInit>(getNameInit())->getValue();
 }
 
 void RecordVal::dump() const { errs() << *this; }