text: /*
   * Copyright 2020-2022 Hewlett Packard Enterprise Development LP
   * Copyright 2004-2019 Cray Inc.
   * Other additional copyright holders may be indicated within.
   *
   * The entirety of this work is licensed under the Apache License,
   * Version 2.0 (the "License"); you may not use this file except
   * in compliance with the License.
   *
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifndef _WHILE_STMT_H_
  #define _WHILE_STMT_H_
  
  #include "LoopStmt.h"
  
  // parent of WhileDoStmt and DoWhileStmt
  class WhileStmt : public LoopStmt
  {
  public:
    Expr*                  condExprGet()                                const;
    SymExpr*               condExprForTmpVariableGet()                  const;
  
  protected:
    WhileStmt(Expr*      sym, BlockStmt* initBody);
    WhileStmt(VarSymbol* sym, BlockStmt* initBody);
   ~WhileStmt() override = default;
  
    void      copyInnerShare(const WhileStmt& ref, SymbolMap* map);
  
    // Interface to BaseAST
    void      verify()                                 override;
  
    // Interface to Expr
    void      replaceChild(Expr* oldAst, Expr* newAst) override;
  
    // New interface
    bool      isWhileStmt()                      const override;
    void      checkConstLoops()                        override;
    bool      deadBlockCleanup()                       override;
    CallExpr* blockInfoGet()                     const override;
    CallExpr* blockInfoSet(CallExpr* expr)             override;
  
  private:
  
    // Helper functions for checkConstLoops()
    SymExpr*               getWhileCondDef(VarSymbol* condSym);
    void                   checkWhileLoopCondition(Expr* condExp);
    bool                   symDeclaredInBlock(Symbol* condSym);
    void                   checkConstWhileLoop();
    bool                   loopBodyHasExits();
  
    Expr*                  mCondExpr;
  };
  
  #endif
  