From: Chris Lattner <sabre@nondot.org>
Date: Sat, 5 Feb 2005 01:37:44 +0000 (+0000)
Subject: SubclassID is really a small field.  Split it into half and let subclasses
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8f0d40392658fd1ccc057198bd5a6f1c85be5425;p=oota-llvm.git

SubclassID is really a small field.  Split it into half and let subclasses
play with the unused part.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20043 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Value.h b/include/llvm/Value.h
index 46257cc7a34..267b9eb1b3e 100644
--- a/include/llvm/Value.h
+++ b/include/llvm/Value.h
@@ -41,7 +41,13 @@ class SymbolTable;
 /// as operands to other values.
 ///
 class Value {
-  unsigned SubclassID;               // Subclass identifier (for isa/dyn_cast)
+  unsigned short SubclassID;         // Subclass identifier (for isa/dyn_cast)
+protected:
+  /// SubclassData - This member is defined by this class, but is not used for
+  /// anything.  Subclasses can use it to hold whatever state they find useful.
+  /// This field is initialized to zero by the ctor.
+  unsigned short SubclassData;
+private:
   PATypeHolder Ty;
   Use *UseList;
   std::string Name;