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comparison src/share/vm/opto/loopopts.cpp @ 7196:2aff40cb4703

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7092905: C2: Keep track of the number of dead nodes Summary: keep an (almost) accurate running count of the reachable (live) flow graph nodes. Reviewed-by: kvn, twisti, jrose, vlivanov
author bharadwaj
date Tue, 27 Nov 2012 17:24:15 -0800
parents d804e148cff8
children 3b9368710f08
comparison
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7195:2cd5e15048e6 7196:2aff40cb4703
727 // Bail out if the region and its phis have too many users. 727 // Bail out if the region and its phis have too many users.
728 int weight = 0; 728 int weight = 0;
729 for (DUIterator_Fast imax, i = region->fast_outs(imax); i < imax; i++) { 729 for (DUIterator_Fast imax, i = region->fast_outs(imax); i < imax; i++) {
730 weight += region->fast_out(i)->outcnt(); 730 weight += region->fast_out(i)->outcnt();
731 } 731 }
732 int nodes_left = MaxNodeLimit - C->unique(); 732 int nodes_left = MaxNodeLimit - C->live_nodes();
733 if (weight * 8 > nodes_left) { 733 if (weight * 8 > nodes_left) {
734 #ifndef PRODUCT 734 #ifndef PRODUCT
735 if (PrintOpto) 735 if (PrintOpto)
736 tty->print_cr("*** Split-if bails out: %d nodes, region weight %d", C->unique(), weight); 736 tty->print_cr("*** Split-if bails out: %d nodes, region weight %d", C->unique(), weight);
737 #endif 737 #endif