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comparison src/share/vm/opto/macro.cpp @ 3788:e3cbc9ddd434

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7044738: Loop unroll optimization causes incorrect result Summary: take into account memory dependencies when clonning nodes in clone_up_backedge_goo(). Reviewed-by: never
author kvn
date Tue, 28 Jun 2011 15:24:29 -0700
parents 642c68c75db9
children f1c12354c3f7
comparison
equal deleted inserted replaced
3787:6ae7a1561b53 3788:e3cbc9ddd434
389 phi->as_Phi()->is_same_inst_field(phi_type, instance_id, alias_idx, offset)) { 389 phi->as_Phi()->is_same_inst_field(phi_type, instance_id, alias_idx, offset)) {
390 return phi; 390 return phi;
391 } 391 }
392 } 392 }
393 // Check if an appropriate new value phi already exists. 393 // Check if an appropriate new value phi already exists.
394 Node* new_phi = NULL; 394 Node* new_phi = value_phis->find(mem->_idx);
395 uint size = value_phis->size(); 395 if (new_phi != NULL)
396 for (uint i=0; i < size; i++) { 396 return new_phi;
397 if ( mem->_idx == value_phis->index_at(i) ) {
398 return value_phis->node_at(i);
399 }
400 }
401 397
402 if (level <= 0) { 398 if (level <= 0) {
403 return NULL; // Give up: phi tree too deep 399 return NULL; // Give up: phi tree too deep
404 } 400 }
405 Node *start_mem = C->start()->proj_out(TypeFunc::Memory); 401 Node *start_mem = C->start()->proj_out(TypeFunc::Memory);