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comparison src/share/vm/opto/doCall.cpp @ 164:c436414a719e

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6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions Summary: Add LoadNKlass and CMoveN nodes, use CmpN and ConN nodes to generate narrow oops compare instructions. Reviewed-by: never, rasbold
author kvn
date Wed, 21 May 2008 13:46:23 -0700
parents 16e1cb7cde24
children d1605aabd0a1
comparison
equal deleted inserted replaced
163:885ed790ecf0 164:c436414a719e
578 578
579 // Get the exception oop klass from its header 579 // Get the exception oop klass from its header
580 Node* ex_klass_node = NULL; 580 Node* ex_klass_node = NULL;
581 if (has_ex_handler() && !ex_type->klass_is_exact()) { 581 if (has_ex_handler() && !ex_type->klass_is_exact()) {
582 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes()); 582 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
583 ex_klass_node = _gvn.transform(new (C, 3) LoadKlassNode(NULL, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT)); 583 ex_klass_node = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) );
584 584
585 // Compute the exception klass a little more cleverly. 585 // Compute the exception klass a little more cleverly.
586 // Obvious solution is to simple do a LoadKlass from the 'ex_node'. 586 // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
587 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for 587 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
588 // each arm of the Phi. If I know something clever about the exceptions 588 // each arm of the Phi. If I know something clever about the exceptions
590 // klass constant for the exception oop. 590 // klass constant for the exception oop.
591 if( ex_node->is_Phi() ) { 591 if( ex_node->is_Phi() ) {
592 ex_klass_node = new (C, ex_node->req()) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT ); 592 ex_klass_node = new (C, ex_node->req()) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT );
593 for( uint i = 1; i < ex_node->req(); i++ ) { 593 for( uint i = 1; i < ex_node->req(); i++ ) {
594 Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() ); 594 Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() );
595 Node* k = _gvn.transform(new (C, 3) LoadKlassNode(0, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT)); 595 Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) );
596 ex_klass_node->init_req( i, k ); 596 ex_klass_node->init_req( i, k );
597 } 597 }
598 _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT); 598 _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT);
599 599
600 } 600 }