Examples of JMultiExpression

com.google.gwt.dev.jjs.ast.js.JMultiExpression
Represents multiple ordered expressions as a single compound expression.

Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

          possibleToInline = false;
        } else if (!body.getLocals().isEmpty()) {
          // methods with local variables cannot be inlined
          possibleToInline = false;
        } else {
          JMultiExpression multi = createMultiExpressionFromBody(body,
              ignoringReturnValueFor == x);
          if (multi != null) {
            possibleToInline = tryInlineExpression(x, ctx, multi);
          }
        }

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Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

     * possible clinit. This is a precursor for inlining the remainder of a
     * method.
     */
    private JMultiExpression createMultiExpressionForInstanceAndClinit(
        JMethodCall x) {
      JMultiExpression multi = new JMultiExpression(x.getSourceInfo());


      // Any instance expression goes first (this can happen even with statics).
      if (x.getInstance() != null) {
        multi.exprs.add(x.getInstance());
      }

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Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

     * expression of the method. If the method is void, the output of the
     * multi-expression should be considered undefined.
     */
    private JMultiExpression createMultiExpressionFromBody(JMethodBody body,
        boolean ignoringReturnValue) {
      JMultiExpression multi = new JMultiExpression(body.getSourceInfo());
      CloneCalleeExpressionVisitor cloner = new CloneCalleeExpressionVisitor();


      for (JStatement stmt : body.getStatements()) {
        if (stmt instanceof JExpressionStatement) {
          JExpressionStatement exprStmt = (JExpressionStatement) stmt;

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Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

     * Creates a multi expression for evaluating a method call instance,
     * possible clinit, and all arguments. This is a precursor for inlining the
     * remainder of a method that does not reference any parameters.
     */
    private JMultiExpression createMultiExpressionIncludingArgs(JMethodCall x) {
      JMultiExpression multi = createMultiExpressionForInstanceAndClinit(x);


      for (int i = 0, c = x.getArgs().size(); i < c; ++i) {
        JExpression arg = x.getArgs().get(i);
        ExpressionAnalyzer analyzer = new ExpressionAnalyzer();
        analyzer.accept(arg);

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Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

      /*
       * A method that doesn't touch any parameters is trivially inlinable (this
       * covers the empty method case)
       */
      if (orderVisitor.checkResults() == SideEffectCheck.NO_REFERENCES) {
        JMultiExpression multi = createMultiExpressionIncludingArgs(x);
        multi.exprs.add(targetExpr);
        replaceWithMulti(ctx, multi);
        return true;
      }


      /*
       * We can still inline in the case where all of the actual arguments are
       * "safe". They must have no side effects, and also have values which
       * could not be affected by the execution of any code within the callee.
       */
      if (orderVisitor.checkResults() == SideEffectCheck.FAILS) {
        for (JExpression arg : x.getArgs()) {
          ExpressionAnalyzer argAnalyzer = new ExpressionAnalyzer();
          argAnalyzer.accept(arg);


          if (argAnalyzer.hasAssignment() || argAnalyzer.accessesField()
              || argAnalyzer.createsObject() || argAnalyzer.canThrowException()) {


            /*
             * This argument evaluation could affect or be affected by the
             * callee so we cannot inline here.
             */
            return true;
          }
        }
      }


      // We're safe to inline.
      JMultiExpression multi = createMultiExpressionForInstanceAndClinit(x);


      // Replace all params in the target expression with the actual arguments.
      new ParameterReplacer(x).accept(targetExpr);


      multi.exprs.add(targetExpr);

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Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

        // This must be a static method
        assert method.isStatic();


        JMethodCall newCall = new JMethodCall(x, x.getInstance());
        List<JParameter> originalParams = methodToOriginalParamsMap.get(method);
        JMultiExpression currentMulti = null;
        for (int i = 0, c = x.getArgs().size(); i < c; ++i) {
          JExpression arg = x.getArgs().get(i);
          JParameter param = null;
          if (i < originalParams.size()) {
            param = originalParams.get(i);
          }


          if (param != null && referencedNonTypes.contains(param)) {
            // If there is an existing multi, terminate it.
            if (currentMulti != null) {
              currentMulti.exprs.add(arg);
              newCall.addArg(currentMulti);
              currentMulti = null;
            } else {
              newCall.addArg(arg);
            }
          } else if (arg.hasSideEffects()) {
            // The argument is only needed for side effects, add it to a multi.
            if (currentMulti == null) {
              currentMulti = new JMultiExpression(x.getSourceInfo());
            }
            currentMulti.exprs.add(arg);
          }
        }

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Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

    }


    private JExpression makeReplacementForAssignment(SourceInfo info,
        JVariableRef variableRef, JExpression rhs) {
      // Replace with a multi, which may wind up empty.
      JMultiExpression multi = new JMultiExpression(info);


      // If the lhs is a field ref, evaluate it first.
      if (variableRef instanceof JFieldRef) {
        JFieldRef fieldRef = (JFieldRef) variableRef;
        JExpression instance = fieldRef.getInstance();

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Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression


        if (dualImpls.contains(targetClass)) {
          /*
           * This is the special-case code to handle interfaces.
           */
          JMultiExpression multi = new JMultiExpression(info);
          JExpression instance = maybeMakeTempAssignment(multi, x.getInstance());


          // instance.method(arg, arg)
          JMethodCall localCall = new JMethodCall(info, instance, x.getTarget());
          localCall.addArgs(x.getArgs());

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Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

    return false;
  }


  @Override
  public boolean visit(JMultiExpression x, Context ctx) {
    JMultiExpression multi = new JMultiExpression(x.getSourceInfo());
    multi.exprs.addAll(cloneExpressions(x.exprs));
    expression = multi;
    return false;
  }

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Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

       * expressions that could have side effects with temporaries, so that they
       * are only run once.
       */
      enterTempUsageScope();
      ReplaceSideEffectsInLvalue replacer = new ReplaceSideEffectsInLvalue(
          new JMultiExpression(x.getSourceInfo()));
      JExpression newLhs = replacer.accept(x.getLhs());
      exitTempUsageScope();


      JBinaryOperation operation = new JBinaryOperation(x.getSourceInfo(),
          newLhs.getType(), op.getNonAssignmentOf(), newLhs, x.getRhs());
      // newLhs is cloned below because it was used in operation
      JBinaryOperation asg = new JBinaryOperation(x.getSourceInfo(), newLhs.getType(),
          JBinaryOperator.ASG, cloner.cloneExpression(newLhs),
          operation);


      JMultiExpression multiExpr = replacer.getMultiExpr();
      if (multiExpr.exprs.isEmpty()) {
        // just use the split assignment expression
        ctx.replaceMe(asg);
      } else {
        // add the assignment as the last item in the multi

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