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comparison src/share/vm/opto/library_call.cpp @ 420:a1980da045cc

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6462850: generate biased locking code in C2 ideal graph Summary: Inline biased locking code in C2 ideal graph during macro nodes expansion Reviewed-by: never
author kvn
date Fri, 07 Nov 2008 09:29:38 -0800
parents 9c2ecc2ffb12
children 98cb887364d3
comparison
equal deleted inserted replaced
419:0bf25c4807f9 420:a1980da045cc
3483 3483
3484 Node *adr = basic_plus_adr(obj, obj, value_field_offset); 3484 Node *adr = basic_plus_adr(obj, obj, value_field_offset);
3485 const TypePtr *adr_type = _gvn.type(adr)->is_ptr(); 3485 const TypePtr *adr_type = _gvn.type(adr)->is_ptr();
3486 int alias_idx = C->get_alias_index(adr_type); 3486 int alias_idx = C->get_alias_index(adr_type);
3487 3487
3488 Node *result = _gvn.transform(new (C, 5) StoreLConditionalNode(control(), memory(alias_idx), adr, newVal, oldVal)); 3488 Node *cas = _gvn.transform(new (C, 5) StoreLConditionalNode(control(), memory(alias_idx), adr, newVal, oldVal));
3489 Node *store_proj = _gvn.transform( new (C, 1) SCMemProjNode(result)); 3489 Node *store_proj = _gvn.transform( new (C, 1) SCMemProjNode(cas));
3490 set_memory(store_proj, alias_idx); 3490 set_memory(store_proj, alias_idx);
3491 3491 Node *bol = _gvn.transform( new (C, 2) BoolNode( cas, BoolTest::eq ) );
3492 push(result); 3492
3493 Node *result;
3494 // CMove node is not used to be able fold a possible check code
3495 // after attemptUpdate() call. This code could be transformed
3496 // into CMove node by loop optimizations.
3497 {
3498 RegionNode *r = new (C, 3) RegionNode(3);
3499 result = new (C, 3) PhiNode(r, TypeInt::BOOL);
3500
3501 Node *iff = create_and_xform_if(control(), bol, PROB_FAIR, COUNT_UNKNOWN);
3502 Node *iftrue = opt_iff(r, iff);
3503 r->init_req(1, iftrue);
3504 result->init_req(1, intcon(1));
3505 result->init_req(2, intcon(0));
3506
3507 set_control(_gvn.transform(r));
3508 record_for_igvn(r);
3509
3510 C->set_has_split_ifs(true); // Has chance for split-if optimization
3511 }
3512
3513 push(_gvn.transform(result));
3493 return true; 3514 return true;
3494 } 3515 }
3495 3516
3496 bool LibraryCallKit::inline_fp_conversions(vmIntrinsics::ID id) { 3517 bool LibraryCallKit::inline_fp_conversions(vmIntrinsics::ID id) {
3497 // restore the arguments 3518 // restore the arguments