Mercurial > jdk8-mips64-public > hotspot / changeset

     1.1 --- a/src/share/vm/opto/loopTransform.cpp	Fri Feb 19 10:04:16 2010 -0800
     1.2 +++ b/src/share/vm/opto/loopTransform.cpp	Fri Feb 19 13:06:11 2010 -0800
     1.3 @@ -2117,6 +2117,18 @@
     1.4  bool PhaseIdealLoop::loop_predication_impl(IdealLoopTree *loop) {
     1.5    if (!UseLoopPredicate) return false;
     1.6  
     1.7 +  if (!loop->_head->is_Loop()) {
     1.8 +    // Could be a simple region when irreducible loops are present.
     1.9 +    return false;
    1.10 +  }
    1.11 +
    1.12 +  CountedLoopNode *cl = NULL;
    1.13 +  if (loop->_head->is_CountedLoop()) {
    1.14 +    cl = loop->_head->as_CountedLoop();
    1.15 +    // do nothing for iteration-splitted loops
    1.16 +    if (!cl->is_normal_loop()) return false;
    1.17 +  }
    1.18 +
    1.19    // Too many traps seen?
    1.20    bool tmt = C->too_many_traps(C->method(), 0, Deoptimization::Reason_predicate);
    1.21    int tc = C->trap_count(Deoptimization::Reason_predicate);
    1.22 @@ -2129,13 +2141,6 @@
    1.23      return false;
    1.24    }
    1.25  
    1.26 -  CountedLoopNode *cl = NULL;
    1.27 -  if (loop->_head->is_CountedLoop()) {
    1.28 -    cl = loop->_head->as_CountedLoop();
    1.29 -    // do nothing for iteration-splitted loops
    1.30 -    if(!cl->is_normal_loop()) return false;
    1.31 -  }
    1.32 -
    1.33    LoopNode *lpn  = loop->_head->as_Loop();
    1.34    Node* entry = lpn->in(LoopNode::EntryControl);
    1.35