jdk.nashorn.internal.ir.IfNode Java Examples

The following examples show how to use jdk.nashorn.internal.ir.IfNode. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: FoldConstants.java    From openjdk-8-source with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public Node leaveIfNode(final IfNode ifNode) {
    final Node test = ifNode.getTest();
    if (test instanceof LiteralNode.PrimitiveLiteralNode) {
        final boolean isTrue = ((LiteralNode.PrimitiveLiteralNode<?>)test).isTrue();
        final Block executed = isTrue ? ifNode.getPass() : ifNode.getFail();
        final Block dropped  = isTrue ? ifNode.getFail() : ifNode.getPass();
        final List<Statement> statements = new ArrayList<>();

        if (executed != null) {
            statements.addAll(executed.getStatements()); // Get statements form executed branch
        }
        if (dropped != null) {
            extractVarNodes(dropped, statements); // Get var-nodes from non-executed branch
        }
        if (statements.isEmpty()) {
            return new EmptyNode(ifNode);
        }
        return BlockStatement.createReplacement(ifNode, ifNode.getFinish(), statements);
    }
    return ifNode;
}
Example #2
Source File: FoldConstants.java    From TencentKona-8 with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public Node leaveIfNode(final IfNode ifNode) {
    final Node test = ifNode.getTest();
    if (test instanceof LiteralNode.PrimitiveLiteralNode) {
        final boolean isTrue = ((LiteralNode.PrimitiveLiteralNode<?>)test).isTrue();
        final Block executed = isTrue ? ifNode.getPass() : ifNode.getFail();
        final Block dropped  = isTrue ? ifNode.getFail() : ifNode.getPass();
        final List<Statement> statements = new ArrayList<>();

        if (executed != null) {
            statements.addAll(executed.getStatements()); // Get statements form executed branch
        }
        if (dropped != null) {
            extractVarNodesFromDeadCode(dropped, statements); // Get var-nodes from non-executed branch
        }
        if (statements.isEmpty()) {
            return new EmptyNode(ifNode);
        }
        return BlockStatement.createReplacement(ifNode, ifNode.getFinish(), statements);
    }
    return ifNode;
}
Example #3
Source File: PrintVisitor.java    From jdk8u60 with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    ifNode.toString(sb, printTypes);
    ifNode.getPass().accept(this);

    final Block fail = ifNode.getFail();

    if (fail != null) {
        sb.append(" else ");
        fail.accept(this);
    }
    if(ifNode.getLocalVariableConversion() != null) {
        assert fail == null;
        sb.append(" else ");
        printLocalVariableConversion(ifNode);
        sb.append(";");
    }
    return false;
}
Example #4
Source File: JSONWriter.java    From jdk8u60 with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    enterDefault(ifNode);

    type("IfStatement");
    comma();

    property("test");
    ifNode.getTest().accept(this);
    comma();

    property("consequent");
    ifNode.getPass().accept(this);
    final Node elsePart = ifNode.getFail();
    comma();

    property("alternate");
    if (elsePart != null) {
        elsePart.accept(this);
    } else {
        nullValue();
    }

    return leave();
}
Example #5
Source File: Parser.java    From jdk8u60 with GNU General Public License v2.0 6 votes vote down vote up 
/**
 * IfStatement :
 *      if ( Expression ) Statement else Statement
 *      if ( Expression ) Statement
 *
 * See 12.5
 *
 * Parse an IF statement.
 */
private void ifStatement() {
    // Capture IF token.
    final int  ifLine  = line;
    final long ifToken = token;
     // IF tested in caller.
    next();

    expect(LPAREN);
    final Expression test = expression();
    expect(RPAREN);
    final Block pass = getStatement();

    Block fail = null;
    if (type == ELSE) {
        next();
        fail = getStatement();
    }

    appendStatement(new IfNode(ifLine, ifToken, fail != null ? fail.getFinish() : pass.getFinish(), test, pass, fail));
}
Example #6
Source File: Parser.java    From openjdk-8 with GNU General Public License v2.0 6 votes vote down vote up 
/**
 * IfStatement :
 *      if ( Expression ) Statement else Statement
 *      if ( Expression ) Statement
 *
 * See 12.5
 *
 * Parse an IF statement.
 */
private void ifStatement() {
    // Capture IF token.
    final int  ifLine  = line;
    final long ifToken = token;
     // IF tested in caller.
    next();

    expect(LPAREN);
    final Expression test = expression();
    expect(RPAREN);
    final Block pass = getStatement();

    Block fail = null;
    if (type == ELSE) {
        next();
        fail = getStatement();
    }

    appendStatement(new IfNode(ifLine, ifToken, fail != null ? fail.getFinish() : pass.getFinish(), test, pass, fail));
}
Example #7
Source File: Parser.java    From openjdk-jdk8u with GNU General Public License v2.0 6 votes vote down vote up 
/**
 * IfStatement :
 *      if ( Expression ) Statement else Statement
 *      if ( Expression ) Statement
 *
 * See 12.5
 *
 * Parse an IF statement.
 */
private void ifStatement() {
    // Capture IF token.
    final int  ifLine  = line;
    final long ifToken = token;
     // IF tested in caller.
    next();

    expect(LPAREN);
    final Expression test = expression();
    expect(RPAREN);
    final Block pass = getStatement();

    Block fail = null;
    if (type == ELSE) {
        next();
        fail = getStatement();
    }

    appendStatement(new IfNode(ifLine, ifToken, fail != null ? fail.getFinish() : pass.getFinish(), test, pass, fail));
}
Example #8
Source File: JSONWriter.java    From openjdk-jdk8u with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    enterDefault(ifNode);

    type("IfStatement");
    comma();

    property("test");
    ifNode.getTest().accept(this);
    comma();

    property("consequent");
    ifNode.getPass().accept(this);
    final Node elsePart = ifNode.getFail();
    comma();

    property("alternate");
    if (elsePart != null) {
        elsePart.accept(this);
    } else {
        nullValue();
    }

    return leave();
}
Example #9
Source File: PrintVisitor.java    From openjdk-jdk8u with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    ifNode.toString(sb, printTypes);
    ifNode.getPass().accept(this);

    final Block fail = ifNode.getFail();

    if (fail != null) {
        sb.append(" else ");
        fail.accept(this);
    }
    if(ifNode.getLocalVariableConversion() != null) {
        assert fail == null;
        sb.append(" else ");
        printLocalVariableConversion(ifNode);
        sb.append(";");
    }
    return false;
}
Example #10
Source File: FoldConstants.java    From openjdk-jdk8u with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public Node leaveIfNode(final IfNode ifNode) {
    final Node test = ifNode.getTest();
    if (test instanceof LiteralNode.PrimitiveLiteralNode) {
        final boolean isTrue = ((LiteralNode.PrimitiveLiteralNode<?>)test).isTrue();
        final Block executed = isTrue ? ifNode.getPass() : ifNode.getFail();
        final Block dropped  = isTrue ? ifNode.getFail() : ifNode.getPass();
        final List<Statement> statements = new ArrayList<>();

        if (executed != null) {
            statements.addAll(executed.getStatements()); // Get statements form executed branch
        }
        if (dropped != null) {
            extractVarNodesFromDeadCode(dropped, statements); // Get var-nodes from non-executed branch
        }
        if (statements.isEmpty()) {
            return new EmptyNode(ifNode);
        }
        return BlockStatement.createReplacement(ifNode, ifNode.getFinish(), statements);
    }
    return ifNode;
}
Example #11
Source File: JSONWriter.java    From jdk8u_nashorn with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    enterDefault(ifNode);

    type("IfStatement");
    comma();

    property("test");
    ifNode.getTest().accept(this);
    comma();

    property("consequent");
    ifNode.getPass().accept(this);
    final Node elsePart = ifNode.getFail();
    comma();

    property("alternate");
    if (elsePart != null) {
        elsePart.accept(this);
    } else {
        nullValue();
    }

    return leave();
}
Example #12
Source File: JSONWriter.java    From openjdk-jdk8u-backup with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    enterDefault(ifNode);

    type("IfStatement");
    comma();

    property("test");
    ifNode.getTest().accept(this);
    comma();

    property("consequent");
    ifNode.getPass().accept(this);
    final Node elsePart = ifNode.getFail();
    comma();

    property("alternate");
    if (elsePart != null) {
        elsePart.accept(this);
    } else {
        nullValue();
    }

    return leave();
}
Example #13
Source File: FoldConstants.java    From jdk8u_nashorn with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public Node leaveIfNode(final IfNode ifNode) {
    final Node test = ifNode.getTest();
    if (test instanceof LiteralNode.PrimitiveLiteralNode) {
        final boolean isTrue = ((LiteralNode.PrimitiveLiteralNode<?>)test).isTrue();
        final Block executed = isTrue ? ifNode.getPass() : ifNode.getFail();
        final Block dropped  = isTrue ? ifNode.getFail() : ifNode.getPass();
        final List<Statement> statements = new ArrayList<>();

        if (executed != null) {
            statements.addAll(executed.getStatements()); // Get statements form executed branch
        }
        if (dropped != null) {
            extractVarNodesFromDeadCode(dropped, statements); // Get var-nodes from non-executed branch
        }
        if (statements.isEmpty()) {
            return new EmptyNode(ifNode);
        }
        return BlockStatement.createReplacement(ifNode, ifNode.getFinish(), statements);
    }
    return ifNode;
}
Example #14
Source File: JSONWriter.java    From openjdk-jdk9 with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    enterDefault(ifNode);

    type("IfStatement");
    comma();

    property("test");
    ifNode.getTest().accept(this);
    comma();

    property("consequent");
    ifNode.getPass().accept(this);
    final Node elsePart = ifNode.getFail();
    comma();

    property("alternate");
    if (elsePart != null) {
        elsePart.accept(this);
    } else {
        nullValue();
    }

    return leave();
}
Example #15
Source File: JSONWriter.java    From TencentKona-8 with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    enterDefault(ifNode);

    type("IfStatement");
    comma();

    property("test");
    ifNode.getTest().accept(this);
    comma();

    property("consequent");
    ifNode.getPass().accept(this);
    final Node elsePart = ifNode.getFail();
    comma();

    property("alternate");
    if (elsePart != null) {
        elsePart.accept(this);
    } else {
        nullValue();
    }

    return leave();
}
Example #16
Source File: Parser.java    From jdk8u_nashorn with GNU General Public License v2.0 6 votes vote down vote up 
/**
 * IfStatement :
 *      if ( Expression ) Statement else Statement
 *      if ( Expression ) Statement
 *
 * See 12.5
 *
 * Parse an IF statement.
 */
private void ifStatement() {
    // Capture IF token.
    final int  ifLine  = line;
    final long ifToken = token;
     // IF tested in caller.
    next();

    expect(LPAREN);
    final Expression test = expression();
    expect(RPAREN);
    final Block pass = getStatement();

    Block fail = null;
    if (type == ELSE) {
        next();
        fail = getStatement();
    }

    appendStatement(new IfNode(ifLine, ifToken, fail != null ? fail.getFinish() : pass.getFinish(), test, pass, fail));
}
Example #17
Source File: JSONWriter.java    From openjdk-8-source with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    enterDefault(ifNode);

    type("IfStatement");
    comma();

    property("test");
    ifNode.getTest().accept(this);
    comma();

    property("consequent");
    ifNode.getPass().accept(this);
    final Node elsePart = ifNode.getFail();
    comma();

    property("alternate");
    if (elsePart != null) {
        elsePart.accept(this);
    } else {
        nullValue();
    }

    return leave();
}
Example #18
Source File: Parser.java    From openjdk-8-source with GNU General Public License v2.0 6 votes vote down vote up 
/**
 * IfStatement :
 *      if ( Expression ) Statement else Statement
 *      if ( Expression ) Statement
 *
 * See 12.5
 *
 * Parse an IF statement.
 */
private void ifStatement() {
    // Capture IF token.
    final int  ifLine  = line;
    final long ifToken = token;
     // IF tested in caller.
    next();

    expect(LPAREN);
    final Expression test = expression();
    expect(RPAREN);
    final Block pass = getStatement();

    Block fail = null;
    if (type == ELSE) {
        next();
        fail = getStatement();
    }

    appendStatement(new IfNode(ifLine, ifToken, fail != null ? fail.getFinish() : pass.getFinish(), test, pass, fail));
}
Example #19
Source File: FoldConstants.java    From openjdk-8 with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public Node leaveIfNode(final IfNode ifNode) {
    final Node test = ifNode.getTest();
    if (test instanceof LiteralNode.PrimitiveLiteralNode) {
        final boolean isTrue = ((LiteralNode.PrimitiveLiteralNode<?>)test).isTrue();
        final Block executed = isTrue ? ifNode.getPass() : ifNode.getFail();
        final Block dropped  = isTrue ? ifNode.getFail() : ifNode.getPass();
        final List<Statement> statements = new ArrayList<>();

        if (executed != null) {
            statements.addAll(executed.getStatements()); // Get statements form executed branch
        }
        if (dropped != null) {
            extractVarNodes(dropped, statements); // Get var-nodes from non-executed branch
        }
        if (statements.isEmpty()) {
            return new EmptyNode(ifNode);
        }
        return BlockStatement.createReplacement(ifNode, ifNode.getFinish(), statements);
    }
    return ifNode;
}
Example #20
Source File: PrintVisitor.java    From hottub with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    ifNode.toString(sb, printTypes);
    ifNode.getPass().accept(this);

    final Block fail = ifNode.getFail();

    if (fail != null) {
        sb.append(" else ");
        fail.accept(this);
    }
    if(ifNode.getLocalVariableConversion() != null) {
        assert fail == null;
        sb.append(" else ");
        printLocalVariableConversion(ifNode);
        sb.append(";");
    }
    return false;
}
Example #21
Source File: JSONWriter.java    From hottub with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    enterDefault(ifNode);

    type("IfStatement");
    comma();

    property("test");
    ifNode.getTest().accept(this);
    comma();

    property("consequent");
    ifNode.getPass().accept(this);
    final Node elsePart = ifNode.getFail();
    comma();

    property("alternate");
    if (elsePart != null) {
        elsePart.accept(this);
    } else {
        nullValue();
    }

    return leave();
}
Example #22
Source File: JSONWriter.java    From openjdk-8 with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    enterDefault(ifNode);

    type("IfStatement");
    comma();

    property("test");
    ifNode.getTest().accept(this);
    comma();

    property("consequent");
    ifNode.getPass().accept(this);
    final Node elsePart = ifNode.getFail();
    comma();

    property("alternate");
    if (elsePart != null) {
        elsePart.accept(this);
    } else {
        nullValue();
    }

    return leave();
}
Example #23
Source File: PrintVisitor.java    From jdk8u_nashorn with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    ifNode.toString(sb, printTypes);
    ifNode.getPass().accept(this);

    final Block fail = ifNode.getFail();

    if (fail != null) {
        sb.append(" else ");
        fail.accept(this);
    }
    if(ifNode.getLocalVariableConversion() != null) {
        assert fail == null;
        sb.append(" else ");
        printLocalVariableConversion(ifNode);
        sb.append(";");
    }
    return false;
}
Example #24
Source File: FoldConstants.java    From openjdk-jdk9 with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public Node leaveIfNode(final IfNode ifNode) {
    final Node test = ifNode.getTest();
    if (test instanceof LiteralNode.PrimitiveLiteralNode) {
        final boolean isTrue = ((LiteralNode.PrimitiveLiteralNode<?>)test).isTrue();
        final Block executed = isTrue ? ifNode.getPass() : ifNode.getFail();
        final Block dropped  = isTrue ? ifNode.getFail() : ifNode.getPass();
        final List<Statement> statements = new ArrayList<>();

        if (executed != null) {
            statements.addAll(executed.getStatements()); // Get statements form executed branch
        }
        if (dropped != null) {
            extractVarNodesFromDeadCode(dropped, statements); // Get var-nodes from non-executed branch
        }
        if (statements.isEmpty()) {
            return new EmptyNode(ifNode);
        }
        return BlockStatement.createReplacement(ifNode, ifNode.getFinish(), statements);
    }
    return ifNode;
}
Example #25
Source File: PrintVisitor.java    From openjdk-jdk9 with GNU General Public License v2.0 6 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    ifNode.toString(sb, printTypes);
    ifNode.getPass().accept(this);

    final Block fail = ifNode.getFail();

    if (fail != null) {
        sb.append(" else ");
        fail.accept(this);
    }
    if(ifNode.getLocalVariableConversion() != null) {
        assert fail == null;
        sb.append(" else ");
        printLocalVariableConversion(ifNode);
        sb.append(";");
    }
    return false;
}
Example #26
Source File: Parser.java    From nashorn with GNU General Public License v2.0 6 votes vote down vote up 
/**
 * IfStatement :
 *      if ( Expression ) Statement else Statement
 *      if ( Expression ) Statement
 *
 * See 12.5
 *
 * Parse an IF statement.
 */
private void ifStatement() {
    // Capture IF token.
    final int  ifLine  = line;
    final long ifToken = token;
     // IF tested in caller.
    next();

    expect(LPAREN);
    final Expression test = expression();
    expect(RPAREN);
    final Block pass = getStatement();

    Block fail = null;
    if (type == ELSE) {
        next();
        fail = getStatement();
    }

    appendStatement(new IfNode(ifLine, ifToken, fail != null ? fail.getFinish() : pass.getFinish(), test, pass, fail));
}
Example #27
Source File: SplitIntoFunctions.java    From openjdk-jdk9 with GNU General Public License v2.0 5 votes vote down vote up 
private static IfNode makeIfStateEquals(final int lineNumber, final long token, final int finish,
        final int value, final Block pass, final Statement fail) {
    return new IfNode(lineNumber, token, finish,
            new BinaryNode(Token.recast(token, TokenType.EQ_STRICT),
                    GetSplitState.INSTANCE, intLiteral(value)),
            pass,
            fail == null ? null : new Block(NO_TOKEN, NO_FINISH, fail));
}
Example #28
Source File: CodeGenerator.java    From openjdk-8 with GNU General Public License v2.0 5 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    lineNumber(ifNode);

    final Expression test = ifNode.getTest();
    final Block pass = ifNode.getPass();
    final Block fail = ifNode.getFail();

    final Label failLabel  = new Label("if_fail");
    final Label afterLabel = fail == null ? failLabel : new Label("if_done");

    new BranchOptimizer(this, method).execute(test, failLabel, false);

    boolean passTerminal = false;
    boolean failTerminal = false;

    pass.accept(this);
    if (!pass.hasTerminalFlags()) {
        method._goto(afterLabel); //don't fallthru to fail block
    } else {
        passTerminal = pass.isTerminal();
    }

    if (fail != null) {
        method.label(failLabel);
        fail.accept(this);
        failTerminal = fail.isTerminal();
    }

    //if if terminates, put the after label there
    if (!passTerminal || !failTerminal) {
        method.label(afterLabel);
    }

    return false;
}
Example #29
Source File: CodeGenerator.java    From openjdk-8-source with GNU General Public License v2.0 5 votes vote down vote up 
@Override
public boolean enterIfNode(final IfNode ifNode) {
    lineNumber(ifNode);

    final Expression test = ifNode.getTest();
    final Block pass = ifNode.getPass();
    final Block fail = ifNode.getFail();

    final Label failLabel  = new Label("if_fail");
    final Label afterLabel = fail == null ? failLabel : new Label("if_done");

    new BranchOptimizer(this, method).execute(test, failLabel, false);

    boolean passTerminal = false;
    boolean failTerminal = false;

    pass.accept(this);
    if (!pass.hasTerminalFlags()) {
        method._goto(afterLabel); //don't fallthru to fail block
    } else {
        passTerminal = pass.isTerminal();
    }

    if (fail != null) {
        method.label(failLabel);
        fail.accept(this);
        failTerminal = fail.isTerminal();
    }

    //if if terminates, put the after label there
    if (!passTerminal || !failTerminal) {
        method.label(afterLabel);
    }

    return false;
}
Example #30
Source File: SplitIntoFunctions.java    From openjdk-jdk8u with GNU General Public License v2.0 5 votes vote down vote up 
private static IfNode makeIfStateEquals(final int lineNumber, final long token, final int finish,
        final int value, final Block pass, final Statement fail) {
    return new IfNode(lineNumber, token, finish,
            new BinaryNode(Token.recast(token, TokenType.EQ_STRICT),
                    GetSplitState.INSTANCE, intLiteral(value)),
            pass,
            fail == null ? null : new Block(NO_TOKEN, NO_FINISH, fail));
}