8368573: MultiBranchNode::required_outcnt should return an unsigned int

Reviewed-by: chagedorn, dfenacci, fandreuzzi

Author: mhaessig

src/hotspot/share/opto/cfgnode.hpp

@@ -313,7 +313,7 @@ class MultiBranchNode : public MultiNode {
  init_class_id(Class_MultiBranch);
  }
  // returns required number of users to be well formed.
- virtual int required_outcnt() const = 0;
+ virtual uint required_outcnt() const = 0;
 };
 
 //------------------------------IfNode-----------------------------------------
@@ -435,7 +435,7 @@ class IfNode : public MultiBranchNode {
  virtual const Type *bottom_type() const { return TypeTuple::IFBOTH; }
  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
  virtual const Type* Value(PhaseGVN* phase) const;
- virtual int required_outcnt() const { return 2; }
+ virtual uint required_outcnt() const { return 2; }
  virtual const RegMask &out_RegMask() const;
  Node* fold_compares(PhaseIterGVN* phase);
  static Node* up_one_dom(Node* curr, bool linear_only = false);
@@ -591,7 +591,7 @@ class PCTableNode : public MultiBranchNode {
  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
  virtual const Type *bottom_type() const;
  virtual bool pinned() const { return true; }
- virtual int required_outcnt() const { return _size; }
+ virtual uint required_outcnt() const { return _size; }
 };
 
 //------------------------------JumpNode---------------------------------------
@@ -716,7 +716,7 @@ class NeverBranchNode : public MultiBranchNode {
  virtual const Type *bottom_type() const { return TypeTuple::IFBOTH; }
  virtual const Type* Value(PhaseGVN* phase) const;
  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
- virtual int required_outcnt() const { return 2; }
+ virtual uint required_outcnt() const { return 2; }
  virtual void emit(C2_MacroAssembler *masm, PhaseRegAlloc *ra_) const { }
  virtual uint size(PhaseRegAlloc *ra_) const { return 0; }
 #ifndef PRODUCT