--- a/hotspot/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp Tue Oct 09 10:09:34 2012 -0700
+++ b/hotspot/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp Fri Oct 12 09:22:52 2012 -0700
@@ -340,7 +340,7 @@
Register receiver = FrameMap::receiver_opr->as_register();
Register ic_klass = IC_Klass;
const int ic_cmp_size = LP64_ONLY(10) NOT_LP64(9);
- const bool do_post_padding = VerifyOops || UseCompressedOops;
+ const bool do_post_padding = VerifyOops || UseCompressedKlassPointers;
if (!do_post_padding) {
// insert some nops so that the verified entry point is aligned on CodeEntryAlignment
while ((__ offset() + ic_cmp_size) % CodeEntryAlignment != 0) {
@@ -1262,7 +1262,11 @@
break;
case T_ADDRESS:
- __ movptr(dest->as_register(), from_addr);
+ if (UseCompressedKlassPointers && addr->disp() == oopDesc::klass_offset_in_bytes()) {
+ __ movl(dest->as_register(), from_addr);
+ } else {
+ __ movptr(dest->as_register(), from_addr);
+ }
break;
case T_INT:
__ movl(dest->as_register(), from_addr);
@@ -1364,6 +1368,12 @@
}
#endif
__ verify_oop(dest->as_register());
+ } else if (type == T_ADDRESS && addr->disp() == oopDesc::klass_offset_in_bytes()) {
+#ifdef _LP64
+ if (UseCompressedKlassPointers) {
+ __ decode_klass_not_null(dest->as_register());
+ }
+#endif
}
}
@@ -1705,7 +1715,7 @@
} else if (obj == klass_RInfo) {
klass_RInfo = dst;
}
- if (k->is_loaded() && !UseCompressedOops) {
+ if (k->is_loaded() && !UseCompressedKlassPointers) {
select_different_registers(obj, dst, k_RInfo, klass_RInfo);
} else {
Rtmp1 = op->tmp3()->as_register();
@@ -3446,7 +3456,7 @@
__ mov_metadata(tmp, default_type->constant_encoding());
#ifdef _LP64
if (UseCompressedKlassPointers) {
- __ encode_heap_oop(tmp);
+ __ encode_klass_not_null(tmp);
}
#endif