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diff src/share/vm/opto/compile.cpp @ 642:660978a2a31a

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6791178: Specialize for zero as the compressed oop vm heap base Summary: Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb. Reviewed-by: never, twisti, jcoomes, coleenp
author kvn
date Thu, 12 Mar 2009 10:37:46 -0700
parents 337400e7a5dd
children bd441136a5ce
line wrap: on
line diff
--- a/src/share/vm/opto/compile.cpp	Wed Mar 11 14:16:13 2009 -0700
+++ b/src/share/vm/opto/compile.cpp	Thu Mar 12 10:37:46 2009 -0700
@@ -2081,7 +2081,7 @@
 
 #ifdef _LP64
   case Op_CastPP:
-    if (n->in(1)->is_DecodeN() && UseImplicitNullCheckForNarrowOop) {
+    if (n->in(1)->is_DecodeN() && Universe::narrow_oop_use_implicit_null_checks()) {
       Compile* C = Compile::current();
       Node* in1 = n->in(1);
       const Type* t = n->bottom_type();
@@ -2136,7 +2136,7 @@
         new_in2 = in2->in(1);
       } else if (in2->Opcode() == Op_ConP) {
         const Type* t = in2->bottom_type();
-        if (t == TypePtr::NULL_PTR && UseImplicitNullCheckForNarrowOop) {
+        if (t == TypePtr::NULL_PTR && Universe::narrow_oop_use_implicit_null_checks()) {
           new_in2 = ConNode::make(C, TypeNarrowOop::NULL_PTR);
           //
           // This transformation together with CastPP transformation above