src/share/vm/opto/loopTransform.cpp

*** 1783,1792 ****
--- 1783,1794 ----
  //
  // "must_reason_predicate" means the uct reason must be Reason_predicate
  bool PhaseIdealLoop::is_uncommon_trap_if_pattern(ProjNode *proj, bool must_reason_predicate) {
    Node *in0 = proj->in(0);
    if (!in0->is_If()) return false;
+   // Variation of a dead If node.
+   if (in0->outcnt() < 2)  return false;
    IfNode* iff = in0->as_If();
  
    // we need "If(Conv2B(Opaque1(...)))" pattern for must_reason_predicate
    if (must_reason_predicate) {
      if (iff->in(1)->Opcode() != Op_Conv2B ||