--- a/hotspot/src/share/vm/opto/mulnode.cpp Tue Apr 29 19:45:22 2008 -0700
+++ b/hotspot/src/share/vm/opto/mulnode.cpp Wed May 07 08:06:46 2008 -0700
@@ -365,6 +365,25 @@
}
//=============================================================================
+//------------------------------Value------------------------------------------
+const Type *MulHiLNode::Value( PhaseTransform *phase ) const {
+ // Either input is TOP ==> the result is TOP
+ const Type *t1 = phase->type( in(1) );
+ const Type *t2 = phase->type( in(2) );
+ if( t1 == Type::TOP ) return Type::TOP;
+ if( t2 == Type::TOP ) return Type::TOP;
+
+ // Either input is BOTTOM ==> the result is the local BOTTOM
+ const Type *bot = bottom_type();
+ if( (t1 == bot) || (t2 == bot) ||
+ (t1 == Type::BOTTOM) || (t2 == Type::BOTTOM) )
+ return bot;
+
+ // It is not worth trying to constant fold this stuff!
+ return TypeLong::LONG;
+}
+
+//=============================================================================
//------------------------------mul_ring---------------------------------------
// Supplied function returns the product of the inputs IN THE CURRENT RING.
// For the logical operations the ring's MUL is really a logical AND function.