[llvm-commits] [PATCH 07/20] [AVX] Unique BitInit

[David Greene]

Keep only two copies of BitInit: one for true and one for false.
---
 utils/TableGen/Record.cpp |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git oldutils/TableGen/Record.cpp newutils/TableGen/Record.cpp
index 72b1f5f..68ac572 100644
--- oldutils/TableGen/Record.cpp
+++ newutils/TableGen/Record.cpp
@@ -405,7 +405,15 @@ const UnsetInit *UnsetInit::get() {
 }
 
 const BitInit *BitInit::get(bool V) {
-  return new BitInit(V);
+  static const BitInit *True  = 0;
+  static const BitInit *False = 0;
+
+  const BitInit **Result = (V ? &True : &False);
+
+  if (*Result == 0)
+    *Result = new BitInit(V);
+
+  return *Result;
 }
 
 const BitsInit *BitsInit::get(ArrayRef<const Init *> Range) {
-- 
1.7.6