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comparison src/share/vm/opto/block.cpp @ 308:756b58154237

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6611837: block frequency is zero Summary: insert_goto_at should set frequency for newly created blocks Reviewed-by: never
author rasbold
date Thu, 28 Aug 2008 10:22:12 -0700
parents a61af66fc99e
children 9ee9cf798b59
comparison
equal deleted inserted replaced
307:892493c3d862 308:756b58154237
465 assert(block_no < _num_blocks, "illegal block number"); 465 assert(block_no < _num_blocks, "illegal block number");
466 Block* in = _blocks[block_no]; 466 Block* in = _blocks[block_no];
467 // get successor block succ_no 467 // get successor block succ_no
468 assert(succ_no < in->_num_succs, "illegal successor number"); 468 assert(succ_no < in->_num_succs, "illegal successor number");
469 Block* out = in->_succs[succ_no]; 469 Block* out = in->_succs[succ_no];
470 // Compute frequency of the new block. Do this before inserting
471 // new block in case succ_prob() needs to infer the probability from
472 // surrounding blocks.
473 float freq = in->_freq * in->succ_prob(succ_no);
470 // get ProjNode corresponding to the succ_no'th successor of the in block 474 // get ProjNode corresponding to the succ_no'th successor of the in block
471 ProjNode* proj = in->_nodes[in->_nodes.size() - in->_num_succs + succ_no]->as_Proj(); 475 ProjNode* proj = in->_nodes[in->_nodes.size() - in->_num_succs + succ_no]->as_Proj();
472 // create region for basic block 476 // create region for basic block
473 RegionNode* region = new (C, 2) RegionNode(2); 477 RegionNode* region = new (C, 2) RegionNode(2);
474 region->init_req(1, proj); 478 region->init_req(1, proj);
489 for (uint i = 1; i < out->num_preds(); i++) { 493 for (uint i = 1; i < out->num_preds(); i++) {
490 if (out->pred(i) == proj) out->head()->set_req(i, gto); 494 if (out->pred(i) == proj) out->head()->set_req(i, gto);
491 } 495 }
492 // remap predecessor's successor to new block 496 // remap predecessor's successor to new block
493 in->_succs.map(succ_no, block); 497 in->_succs.map(succ_no, block);
498 // Set the frequency of the new block
499 block->_freq = freq;
494 // add new basic block to basic block list 500 // add new basic block to basic block list
495 _blocks.insert(block_no + 1, block); 501 _blocks.insert(block_no + 1, block);
496 _num_blocks++; 502 _num_blocks++;
497 } 503 }
498 504