[llvm-commits] [llvm] r76189 - in /llvm/trunk: include/llvm/Value.h lib/VMCore/Value.cpp

Dan Gohman gohman at apple.com
Fri Jul 17 10:17:30 PDT 2009


Author: djg
Date: Fri Jul 17 12:16:59 2009
New Revision: 76189

URL: http://llvm.org/viewvc/llvm-project?rev=76189&view=rev
Log:
Add a SubclassOptionalData field to Value. See the doxygen comment for
details.

Modified:
    llvm/trunk/include/llvm/Value.h
    llvm/trunk/lib/VMCore/Value.cpp

Modified: llvm/trunk/include/llvm/Value.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Value.h?rev=76189&r1=76188&r2=76189&view=diff

==============================================================================
--- llvm/trunk/include/llvm/Value.h (original)
+++ llvm/trunk/include/llvm/Value.h Fri Jul 17 12:16:59 2009
@@ -62,6 +62,12 @@
   const unsigned char SubclassID;   // Subclass identifier (for isa/dyn_cast)
   unsigned char HasValueHandle : 1; // Has a ValueHandle pointing to this?
 protected:
+  /// SubclassOptionalData - This member is similar to SubclassData, however it
+  /// is for holding information which may be used to aid optimization, but
+  /// which may be cleared to zero without affecting conservative
+  /// interpretation.
+  unsigned char SubclassOptionalData : 7;
+
   /// 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.

Modified: llvm/trunk/lib/VMCore/Value.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Value.cpp?rev=76189&r1=76188&r2=76189&view=diff

==============================================================================
--- llvm/trunk/lib/VMCore/Value.cpp (original)
+++ llvm/trunk/lib/VMCore/Value.cpp Fri Jul 17 12:16:59 2009
@@ -40,7 +40,8 @@
 }
 
 Value::Value(const Type *ty, unsigned scid)
-  : SubclassID(scid), HasValueHandle(0), SubclassData(0), VTy(checkType(ty)),
+  : SubclassID(scid), HasValueHandle(0), SubclassOptionalData(0),
+    SubclassData(0), VTy(checkType(ty)),
     UseList(0), Name(0) {
   if (isa<CallInst>(this) || isa<InvokeInst>(this))
     assert((VTy->isFirstClassType() || VTy == Type::VoidTy ||





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