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comparison src/share/vm/opto/loopTransform.cpp @ 1275:b71f13525cc8

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6927049: assert(is_Loop(),"invalid node class") Reviewed-by: kvn
author never
date Fri, 19 Feb 2010 13:06:11 -0800
parents b2b6a9bf6238
children 336c6c200f5f
comparison
equal deleted inserted replaced
1274:2883969d09e7 1275:b71f13525cc8
2115 //------------------------------ loop_predication_impl-------------------------- 2115 //------------------------------ loop_predication_impl--------------------------
2116 // Insert loop predicates for null checks and range checks 2116 // Insert loop predicates for null checks and range checks
2117 bool PhaseIdealLoop::loop_predication_impl(IdealLoopTree *loop) { 2117 bool PhaseIdealLoop::loop_predication_impl(IdealLoopTree *loop) {
2118 if (!UseLoopPredicate) return false; 2118 if (!UseLoopPredicate) return false;
2119 2119
2120 if (!loop->_head->is_Loop()) {
2121 // Could be a simple region when irreducible loops are present.
2122 return false;
2123 }
2124
2125 CountedLoopNode *cl = NULL;
2126 if (loop->_head->is_CountedLoop()) {
2127 cl = loop->_head->as_CountedLoop();
2128 // do nothing for iteration-splitted loops
2129 if (!cl->is_normal_loop()) return false;
2130 }
2131
2120 // Too many traps seen? 2132 // Too many traps seen?
2121 bool tmt = C->too_many_traps(C->method(), 0, Deoptimization::Reason_predicate); 2133 bool tmt = C->too_many_traps(C->method(), 0, Deoptimization::Reason_predicate);
2122 int tc = C->trap_count(Deoptimization::Reason_predicate); 2134 int tc = C->trap_count(Deoptimization::Reason_predicate);
2123 if (tmt || tc > 0) { 2135 if (tmt || tc > 0) {
2124 if (TraceLoopPredicate) { 2136 if (TraceLoopPredicate) {
2125 tty->print_cr("too many predicate traps: %d", tc); 2137 tty->print_cr("too many predicate traps: %d", tc);
2126 C->method()->print(); // which method has too many predicate traps 2138 C->method()->print(); // which method has too many predicate traps
2127 tty->print_cr(""); 2139 tty->print_cr("");
2128 } 2140 }
2129 return false; 2141 return false;
2130 }
2131
2132 CountedLoopNode *cl = NULL;
2133 if (loop->_head->is_CountedLoop()) {
2134 cl = loop->_head->as_CountedLoop();
2135 // do nothing for iteration-splitted loops
2136 if(!cl->is_normal_loop()) return false;
2137 } 2142 }
2138 2143
2139 LoopNode *lpn = loop->_head->as_Loop(); 2144 LoopNode *lpn = loop->_head->as_Loop();
2140 Node* entry = lpn->in(LoopNode::EntryControl); 2145 Node* entry = lpn->in(LoopNode::EntryControl);
2141 2146