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6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions

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Add LoadNKlass and CMoveN nodes, use CmpN and ConN nodes to generate narrow oops compare instructions.

Reviewed-by: never, rasbold
This commit is contained in:
Vladimir Kozlov 2008-05-21 13:46:23 -07:00
parent 757229db71
commit 76035424de
29 changed files with 428 additions and 128 deletions
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hotspot/src/share/vm/opto/parse1.cpp
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@ -1901,7 +1901,7 @@ void Parse::call_register_finalizer() {
// finalization. In general this will fold up since the concrete
// class is often visible so the access flags are constant.
Node* klass_addr = basic_plus_adr( receiver, receiver, oopDesc::klass_offset_in_bytes() );
Node* klass = _gvn.transform(new (C, 3) LoadKlassNode(NULL, immutable_memory(), klass_addr, TypeInstPtr::KLASS));
Node* klass = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), klass_addr, TypeInstPtr::KLASS) );
Node* access_flags_addr = basic_plus_adr(klass, klass, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc));
Node* access_flags = make_load(NULL, access_flags_addr, TypeInt::INT, T_INT);