block.java

来自「JDK1.4编译器后端」· Java 代码 · 共 513 行 · 第 1/2 页

package AST;
import java.util.HashSet;import java.util.LinkedHashSet;import java.io.FileNotFoundException;import java.io.File;import java.util.*;import beaver.*;import java.util.ArrayList;import java.util.zip.*;import java.io.*;
  // a statement that can be reached by break or continue

public class Block extends Stmt implements Cloneable, VariableScope {
    public void flushCache() {
        super.flushCache();
        checkReturnDA_Variable_values = null;
        isDAafter_Variable_values = null;
        checkReturnDU_Variable_values = null;
        isDUafter_Variable_values = null;
        localVariableDeclaration_String_values = null;
        canCompleteNormally_computed = false;
        variableScopeEndLabel_CodeGeneration_values = null;
        lookupType_String_values = null;
        lookupVariable_String_values = null;
    }
     @SuppressWarnings({"unchecked", "cast"})  public Block clone() throws CloneNotSupportedException {
        Block node = (Block)super.clone();
        node.checkReturnDA_Variable_values = null;
        node.isDAafter_Variable_values = null;
        node.checkReturnDU_Variable_values = null;
        node.isDUafter_Variable_values = null;
        node.localVariableDeclaration_String_values = null;
        node.canCompleteNormally_computed = false;
        node.variableScopeEndLabel_CodeGeneration_values = null;
        node.lookupType_String_values = null;
        node.lookupVariable_String_values = null;
        node.in$Circle(false);
        node.is$Final(false);
    return node;
    }
     @SuppressWarnings({"unchecked", "cast"})  public Block copy() {
      try {
          Block node = (Block)clone();
          if(children != null) node.children = (ASTNode[])children.clone();
          return node;
      } catch (CloneNotSupportedException e) {
      }
      System.err.println("Error: Could not clone node of type " + getClass().getName() + "!");
      return null;
    }
     @SuppressWarnings({"unchecked", "cast"})  public Block fullCopy() {
        Block res = (Block)copy();
        for(int i = 0; i < getNumChildNoTransform(); i++) {
          ASTNode node = getChildNoTransform(i);
          if(node != null) node = node.fullCopy();
          res.setChild(node, i);
        }
        return res;
    }
    // Declared in DeclareBeforeUse.jrag at line 21


  public boolean declaredBeforeUse(Variable decl, ASTNode use) {
    int indexDecl = ((ASTNode)decl).varChildIndex(this);
    int indexUse = use.varChildIndex(this);
    return indexDecl <= indexUse;
  }

    // Declared in DeclareBeforeUse.jrag at line 26

  public boolean declaredBeforeUse(Variable decl, int indexUse) {
    int indexDecl = ((ASTNode)decl).varChildIndex(this);
    return indexDecl <= indexUse;
  }

    // Declared in PrettyPrint.jadd at line 542


  // Stmts

  public void toString(StringBuffer s) {
    s.append("{\n");
    indent++;
    for(int i = 0; i < getNumStmt(); i++) {
      s.append(indent());
      getStmt(i).toString(s);
    }
    indent--;
    s.append(indent());
    s.append("}\n");
  }

    // Declared in CreateBCode.jrag at line 1158

  
  public void createBCode(CodeGeneration gen) {
    //super.createBCode(gen);
    for(int i = 0; i < getNumStmt(); i++) {
      try {
        getStmt(i).createBCode(gen);
      } catch (Exception e) {
        e.printStackTrace();
        throw new Error("Error generating code for " + errorPrefix() + " " + getStmt(i));
      }
    }
    gen.addVariableScopeLabel(variableScopeEndLabel(gen));
  }

    // Declared in java.ast at line 3
    // Declared in java.ast line 200

    public Block() {
        super();

        setChild(new List(), 0);

    }

    // Declared in java.ast at line 11


    // Declared in java.ast line 200
    public Block(List<Stmt> p0) {
        setChild(p0, 0);
    }

    // Declared in java.ast at line 15


  protected int numChildren() {
    return 1;
  }

    // Declared in java.ast at line 18

  public boolean mayHaveRewrite() { return false; }

    // Declared in java.ast at line 2
    // Declared in java.ast line 200
    public void setStmtList(List<Stmt> list) {
        setChild(list, 0);
    }

    // Declared in java.ast at line 6


    private int getNumStmt = 0;

    // Declared in java.ast at line 7

    public int getNumStmt() {
        return getStmtList().getNumChild();
    }

    // Declared in java.ast at line 11


     @SuppressWarnings({"unchecked", "cast"})  public Stmt getStmt(int i) {
        return (Stmt)getStmtList().getChild(i);
    }

    // Declared in java.ast at line 15


    public void addStmt(Stmt node) {
        List<Stmt> list = getStmtList();
        list.addChild(node);
    }

    // Declared in java.ast at line 20


    public void setStmt(Stmt node, int i) {
        List<Stmt> list = getStmtList();
        list.setChild(node, i);
    }

    // Declared in java.ast at line 24

    public List<Stmt> getStmts() {
        return getStmtList();
    }

    // Declared in java.ast at line 27

    public List<Stmt> getStmtsNoTransform() {
        return getStmtListNoTransform();
    }

    // Declared in java.ast at line 31


     @SuppressWarnings({"unchecked", "cast"})  public List<Stmt> getStmtList() {
        return (List<Stmt>)getChild(0);
    }

    // Declared in java.ast at line 35


     @SuppressWarnings({"unchecked", "cast"})  public List<Stmt> getStmtListNoTransform() {
        return (List<Stmt>)getChildNoTransform(0);
    }

    protected java.util.Map checkReturnDA_Variable_values;
    // Declared in DefiniteAssignment.jrag at line 302
 @SuppressWarnings({"unchecked", "cast"})     public boolean checkReturnDA(Variable v) {
        Object _parameters = v;
if(checkReturnDA_Variable_values == null) checkReturnDA_Variable_values = new java.util.HashMap(4);
        if(checkReturnDA_Variable_values.containsKey(_parameters))
            return ((Boolean)checkReturnDA_Variable_values.get(_parameters)).booleanValue();
        int num = boundariesCrossed;
        boolean isFinal = this.is$Final();
        boolean checkReturnDA_Variable_value = checkReturnDA_compute(v);
        if(isFinal && num == boundariesCrossed)
            checkReturnDA_Variable_values.put(_parameters, Boolean.valueOf(checkReturnDA_Variable_value));
        return checkReturnDA_Variable_value;
    }

    private boolean checkReturnDA_compute(Variable v) {
    HashSet set = new HashSet();
    collectBranches(set);
    for(Iterator iter = set.iterator(); iter.hasNext(); ) {
      Object o = iter.next();
      if(o instanceof ReturnStmt) {
        ReturnStmt stmt = (ReturnStmt)o;
        if(!stmt.isDAafterReachedFinallyBlocks(v))
          return false;
      }
    }
    return true;
  }

    // Declared in DefiniteAssignment.jrag at line 442
 @SuppressWarnings({"unchecked", "cast"})     public boolean isDAafter(Variable v) {
        Object _parameters = v;
if(isDAafter_Variable_values == null) isDAafter_Variable_values = new java.util.HashMap(4);
        if(isDAafter_Variable_values.containsKey(_parameters))
            return ((Boolean)isDAafter_Variable_values.get(_parameters)).booleanValue();
        int num = boundariesCrossed;
        boolean isFinal = this.is$Final();
        boolean isDAafter_Variable_value = isDAafter_compute(v);
        if(isFinal && num == boundariesCrossed)
            isDAafter_Variable_values.put(_parameters, Boolean.valueOf(isDAafter_Variable_value));
        return isDAafter_Variable_value;
    }

    private boolean isDAafter_compute(Variable v) {  return getNumStmt() == 0 ? isDAbefore(v) : getStmt(getNumStmt()-1).isDAafter(v);  }

    // Declared in DefiniteAssignment.jrag at line 448
 @SuppressWarnings({"unchecked", "cast"})     public boolean isDUeverywhere(Variable v) {
        boolean isDUeverywhere_Variable_value = isDUeverywhere_compute(v);
        return isDUeverywhere_Variable_value;
    }

    private boolean isDUeverywhere_compute(Variable v) {  return isDUbefore(v) && checkDUeverywhere(v);  }

    protected java.util.Map checkReturnDU_Variable_values;
    // Declared in DefiniteAssignment.jrag at line 758
 @SuppressWarnings({"unchecked", "cast"})     public boolean checkReturnDU(Variable v) {
        Object _parameters = v;
if(checkReturnDU_Variable_values == null) checkReturnDU_Variable_values = new java.util.HashMap(4);
        if(checkReturnDU_Variable_values.containsKey(_parameters))
            return ((Boolean)checkReturnDU_Variable_values.get(_parameters)).booleanValue();
        int num = boundariesCrossed;