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diff src/cpu/x86/vm/x86_64.ad @ 182:44abbb0d4c18

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6709093: Compressed Oops: reduce size of compiled methods Summary: exclude UEP size from nmethod code size and use narrow klass oop to load prototype header. Reviewed-by: jrose, never
author kvn
date Thu, 05 Jun 2008 13:02:51 -0700
parents 9148c65abefc
children d1605aabd0a1 1e026f8da827
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line diff
--- a/src/cpu/x86/vm/x86_64.ad	Wed Jun 04 21:56:27 2008 -0700
+++ b/src/cpu/x86/vm/x86_64.ad	Thu Jun 05 13:02:51 2008 -0700
@@ -6149,7 +6149,7 @@
   match(Set dst (LoadNKlass mem));
 
   ins_cost(125); // XXX
-  format %{ "movl    $dst, $mem\t# compressed klass ptr\n\t" %}
+  format %{ "movl    $dst, $mem\t# compressed klass ptr" %}
   ins_encode %{
     Address addr = build_address($mem$$base, $mem$$index, $mem$$scale, $mem$$disp);
     Register dst = as_Register($dst$$reg);
@@ -7089,7 +7089,8 @@
 %}
 
 instruct decodeHeapOop(rRegP dst, rRegN src, rFlagsReg cr) %{
-  predicate(n->bottom_type()->is_oopptr()->ptr() != TypePtr::NotNull);
+  predicate(n->bottom_type()->is_oopptr()->ptr() != TypePtr::NotNull &&
+            n->bottom_type()->is_oopptr()->ptr() != TypePtr::Constant);
   match(Set dst (DecodeN src));
   effect(KILL cr);
   format %{ "decode_heap_oop $dst,$src" %}
@@ -7105,7 +7106,8 @@
 %}
 
 instruct decodeHeapOop_not_null(rRegP dst, rRegN src) %{
-  predicate(n->bottom_type()->is_oopptr()->ptr() == TypePtr::NotNull);
+  predicate(n->bottom_type()->is_oopptr()->ptr() == TypePtr::NotNull ||
+            n->bottom_type()->is_oopptr()->ptr() == TypePtr::Constant);
   match(Set dst (DecodeN src));
   format %{ "decode_heap_oop_not_null $dst,$src" %}
   ins_encode %{