[llvm-commits] [llvm] r49526 - in /llvm/branches/ggreif/use-diet/include/llvm: Use.h Value.h

[Gabor Greif]

Author: ggreif
Date: Fri Apr 11 06:22:04 2008
New Revision: 49526

URL: http://llvm.org/viewvc/llvm-project?rev=49526&view=rev
Log:
implement transferTag and use it in Use::init and Use::set

Modified:
    llvm/branches/ggreif/use-diet/include/llvm/Use.h
    llvm/branches/ggreif/use-diet/include/llvm/Value.h

Modified: llvm/branches/ggreif/use-diet/include/llvm/Use.h
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/ggreif/use-diet/include/llvm/Use.h?rev=49526&r1=49525&r2=49526&view=diff

==============================================================================
--- llvm/branches/ggreif/use-diet/include/llvm/Use.h (original)
+++ llvm/branches/ggreif/use-diet/include/llvm/Use.h Fri Apr 11 06:22:04 2008
@@ -80,6 +80,9 @@
   static Value *stripTag(Value *V) {
     return reinterpret_cast<Value*>(reinterpret_cast<ptrdiff_t>(V) & ~3UL);
   }
+  Value *transferTag(Value *V) {
+    return reinterpret_cast<Value*>(reinterpret_cast<ptrdiff_t>(V) + (reinterpret_cast<ptrdiff_t>(Val) & ~3UL));
+  }
   void addToList(Use **List) {
     Next = *List;
     if (Next) Next->Prev = &Next;

Modified: llvm/branches/ggreif/use-diet/include/llvm/Value.h
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/ggreif/use-diet/include/llvm/Value.h?rev=49526&r1=49525&r2=49526&view=diff

==============================================================================
--- llvm/branches/ggreif/use-diet/include/llvm/Value.h (original)
+++ llvm/branches/ggreif/use-diet/include/llvm/Value.h Fri Apr 11 06:22:04 2008
@@ -223,15 +223,15 @@
   return OS;
 }
 
-void Use::init(Value *v, User *user) {
-  Val = v;
+void Use::init(Value *V, User *user) {
+  Val = transferTag(V);
   U = user;
-  if (Val) Val->addUse(*this);
+  if (V) V->addUse(*this);
 }
 
 void Use::set(Value *V) {
-  if (Val) removeFromList();
-  Val = V;
+  if (stripTag(Val)) removeFromList();
+  Val = transferTag(V);
   if (V) V->addUse(*this);
 }