Mercurial > hg > truffle
comparison src/share/vm/opto/lcm.cpp @ 7196:2aff40cb4703
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 |
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date | Tue, 27 Nov 2012 17:24:15 -0800 |
parents | 8e47bac5643a |
children | b30b3c2a0cf2 |
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7195:2cd5e15048e6 | 7196:2aff40cb4703 |
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1004 } | 1004 } |
1005 | 1005 |
1006 //------------------------------call_catch_cleanup----------------------------- | 1006 //------------------------------call_catch_cleanup----------------------------- |
1007 // If we inserted any instructions between a Call and his CatchNode, | 1007 // If we inserted any instructions between a Call and his CatchNode, |
1008 // clone the instructions on all paths below the Catch. | 1008 // clone the instructions on all paths below the Catch. |
1009 void Block::call_catch_cleanup(Block_Array &bbs) { | 1009 void Block::call_catch_cleanup(Block_Array &bbs, Compile* C) { |
1010 | 1010 |
1011 // End of region to clone | 1011 // End of region to clone |
1012 uint end = end_idx(); | 1012 uint end = end_idx(); |
1013 if( !_nodes[end]->is_Catch() ) return; | 1013 if( !_nodes[end]->is_Catch() ) return; |
1014 // Start of region to clone | 1014 // Start of region to clone |
1066 | 1066 |
1067 } // End of for all Nodes in cloned area | 1067 } // End of for all Nodes in cloned area |
1068 | 1068 |
1069 // Remove the now-dead cloned ops | 1069 // Remove the now-dead cloned ops |
1070 for(uint i3 = beg; i3 < end; i3++ ) { | 1070 for(uint i3 = beg; i3 < end; i3++ ) { |
1071 _nodes[beg]->disconnect_inputs(NULL); | 1071 _nodes[beg]->disconnect_inputs(NULL, C); |
1072 _nodes.remove(beg); | 1072 _nodes.remove(beg); |
1073 } | 1073 } |
1074 | 1074 |
1075 // If the successor blocks have a CreateEx node, move it back to the top | 1075 // If the successor blocks have a CreateEx node, move it back to the top |
1076 for(uint i4 = 0; i4 < _num_succs; i4++ ) { | 1076 for(uint i4 = 0; i4 < _num_succs; i4++ ) { |
1079 // Remove any newly created, but dead, nodes. | 1079 // Remove any newly created, but dead, nodes. |
1080 for( uint j = new_cnt; j > 0; j-- ) { | 1080 for( uint j = new_cnt; j > 0; j-- ) { |
1081 Node *n = sb->_nodes[j]; | 1081 Node *n = sb->_nodes[j]; |
1082 if (n->outcnt() == 0 && | 1082 if (n->outcnt() == 0 && |
1083 (!n->is_Proj() || n->as_Proj()->in(0)->outcnt() == 1) ){ | 1083 (!n->is_Proj() || n->as_Proj()->in(0)->outcnt() == 1) ){ |
1084 n->disconnect_inputs(NULL); | 1084 n->disconnect_inputs(NULL, C); |
1085 sb->_nodes.remove(j); | 1085 sb->_nodes.remove(j); |
1086 new_cnt--; | 1086 new_cnt--; |
1087 } | 1087 } |
1088 } | 1088 } |
1089 // If any newly created nodes remain, move the CreateEx node to the top | 1089 // If any newly created nodes remain, move the CreateEx node to the top |