code: /**
   * Copyright (c) 2005, Regents of the University of California
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   *
   * Redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in the
   * documentation and/or other materials provided with the distribution.
   *
   * Neither the name of the University of California, Los Angeles nor the
   * names of its contributors may be used to endorse or promote products
   * derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package jintgen.isdl.verifier;
  
  import cck.text.Status;
  import cck.text.Verbose;
  import jintgen.gen.Canonicalizer;
  import jintgen.isdl.*;
  
  /**
   * The <code>Verifier</code> class performs some consistency checks on an architecture description
   * such as checking for redeclared instructions, mismatched types, ambiguous encodings, etc.
   *
   * @author Ben L. Titzer
   */
  public class Verifier {
  
      public final ArchDecl arch;
      public final JIGIRErrorReporter ERROR;
  
      Verbose.Printer printer = Verbose.getVerbosePrinter("jintgen.verifier");
  
      public Verifier(ArchDecl a) {
          arch = a;
          ERROR = arch.ERROR;
      }
  
      public void verify() {
          runVerifierPass("Building type environment", new TypeEnvBuilder(arch));
          runVerifierPass("Verifying operand types and addressing modes", new AddrModeVerifier(arch));
          runVerifierPass("Verifying addressing mode sets", new AddrSetVerifier(arch));
          runVerifierPass("Verifying instructions", new InstrVerifier(arch));
          runVerifierPass("Computing encoding sizes", new EncodingVerifier(arch));
          runVerifierPass("Typechecking", new TypeChecker(ERROR, arch));
          canonicalize();
      }
  
      private void runVerifierPass(String n, VerifierPass p) {
          Status.begin(n);
          p.verify();
          Status.success();
      }
  
      private void canonicalize() {
          Canonicalizer canon = new Canonicalizer();
          for ( SubroutineDecl d : arch.subroutines ) {
              if ( !d.code.hasBody() ) continue;
              d.code.setStmts(canon.process(d.code.getStmts()));
          }
          for ( InstrDecl d : arch.instructions ) {
              if ( !d.code.hasBody() ) continue;
              d.code.setStmts(canon.process(d.code.getStmts()));
          }
      }
  }
  