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diff src/share/vm/opto/compile.cpp @ 325:93befa083681

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6741004: UseLargePages + UseCompressedOops breaks implicit null checking guard page Summary: Turn off c2 implicit null checking on windows and large pages specified. Reviewed-by: jrose, xlu
author coleenp
date Tue, 02 Sep 2008 15:18:26 -0400
parents c3e045194476
children 7484fa4b8825
line wrap: on
line diff
--- a/src/share/vm/opto/compile.cpp	Sun Aug 31 15:24:54 2008 -0700
+++ b/src/share/vm/opto/compile.cpp	Tue Sep 02 15:18:26 2008 -0400
@@ -2082,7 +2082,7 @@
         in2 = n->in(2)->in(1);
       } else if ( n->in(2)->Opcode() == Op_ConP ) {
         const Type* t = n->in(2)->bottom_type();
-        if (t == TypePtr::NULL_PTR) {
+        if (t == TypePtr::NULL_PTR && UseImplicitNullCheckForNarrowOop) {
           Node *in1 = n->in(1);
           if (Matcher::clone_shift_expressions) {
             // x86, ARM and friends can handle 2 adds in addressing mode.