Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- a/src/share/vm/opto/loopTransform.cpp	Tue Sep 30 15:53:55 2008 -0700
     1.2 +++ b/src/share/vm/opto/loopTransform.cpp	Thu Oct 02 08:37:44 2008 -0700
     1.3 @@ -679,6 +679,10 @@
     1.4    CountedLoopNode *post_head = old_new[main_head->_idx]->as_CountedLoop();
     1.5    post_head->set_post_loop(main_head);
     1.6  
     1.7 +  // Reduce the post-loop trip count.
     1.8 +  CountedLoopEndNode* post_end = old_new[main_end ->_idx]->as_CountedLoopEnd();
     1.9 +  post_end->_prob = PROB_FAIR;
    1.10 +
    1.11    // Build the main-loop normal exit.
    1.12    IfFalseNode *new_main_exit = new (C, 1) IfFalseNode(main_end);
    1.13    _igvn.register_new_node_with_optimizer( new_main_exit );
    1.14 @@ -748,6 +752,9 @@
    1.15    pre_head->set_pre_loop(main_head);
    1.16    Node *pre_incr = old_new[incr->_idx];
    1.17  
    1.18 +  // Reduce the pre-loop trip count.
    1.19 +  pre_end->_prob = PROB_FAIR;
    1.20 +
    1.21    // Find the pre-loop normal exit.
    1.22    Node* pre_exit = pre_end->proj_out(false);
    1.23    assert( pre_exit->Opcode() == Op_IfFalse, "" );
    1.24 @@ -767,8 +774,8 @@
    1.25    register_new_node( min_cmp , new_pre_exit );
    1.26    register_new_node( min_bol , new_pre_exit );
    1.27  
    1.28 -  // Build the IfNode
    1.29 -  IfNode *min_iff = new (C, 2) IfNode( new_pre_exit, min_bol, PROB_FAIR, COUNT_UNKNOWN );
    1.30 +  // Build the IfNode (assume the main-loop is executed always).
    1.31 +  IfNode *min_iff = new (C, 2) IfNode( new_pre_exit, min_bol, PROB_ALWAYS, COUNT_UNKNOWN );
    1.32    _igvn.register_new_node_with_optimizer( min_iff );
    1.33    set_idom(min_iff, new_pre_exit, dd_main_head);
    1.34    set_loop(min_iff, loop->_parent);