Mercurial > hg > openjdk > aarch64-port > nashorn
changeset 1146:bbbe34896bde
8066224: fixes for folding a constant-test ternary operator
Reviewed-by: hannesw, lagergren
| author | attila |
|---|---|
| date | Wed, 10 Dec 2014 11:55:25 +0100 |
| parents | 403f4402f8d2 |
| children | 8cb808c0db80 |
| files | src/jdk/nashorn/internal/codegen/CodeGenerator.java src/jdk/nashorn/internal/codegen/FoldConstants.java test/script/basic/JDK-8066224.js test/script/basic/JDK-8066224.js.EXPECTED |
| diffstat | 4 files changed, 54 insertions(+), 2 deletions(-) [+] |
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--- a/src/jdk/nashorn/internal/codegen/CodeGenerator.java Wed Dec 10 11:55:04 2014 +0100 +++ b/src/jdk/nashorn/internal/codegen/CodeGenerator.java Wed Dec 10 11:55:25 2014 +0100 @@ -2021,6 +2021,19 @@ final Expression test = ifNode.getTest(); final Block pass = ifNode.getPass(); final Block fail = ifNode.getFail(); + + if (Expression.isAlwaysTrue(test)) { + loadAndDiscard(test); + pass.accept(this); + return false; + } else if (Expression.isAlwaysFalse(test)) { + loadAndDiscard(test); + if (fail != null) { + fail.accept(this); + } + return false; + } + final boolean hasFailConversion = LocalVariableConversion.hasLiveConversion(ifNode); final Label failLabel = new Label("if_fail"); @@ -2040,7 +2053,7 @@ method.beforeJoinPoint(ifNode); } - if(afterLabel != null) { + if(afterLabel != null && afterLabel.isReachable()) { method.label(afterLabel); }
--- a/src/jdk/nashorn/internal/codegen/FoldConstants.java Wed Dec 10 11:55:04 2014 +0100 +++ b/src/jdk/nashorn/internal/codegen/FoldConstants.java Wed Dec 10 11:55:25 2014 +0100 @@ -131,7 +131,7 @@ public Node leaveTernaryNode(final TernaryNode ternaryNode) { final Node test = ternaryNode.getTest(); if (test instanceof LiteralNode.PrimitiveLiteralNode) { - return ((LiteralNode.PrimitiveLiteralNode<?>)test).isTrue() ? ternaryNode.getTrueExpression() : ternaryNode.getFalseExpression(); + return (((LiteralNode.PrimitiveLiteralNode<?>)test).isTrue() ? ternaryNode.getTrueExpression() : ternaryNode.getFalseExpression()).getExpression(); } return ternaryNode; }
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/script/basic/JDK-8066224.js Wed Dec 10 11:55:25 2014 +0100 @@ -0,0 +1,38 @@ +/* + * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/** + * JDK-8066224: fixes for folding a constant-test ternary operator + * + * @test + * @run + */ + +print((function(){ + if(false ? 0 : '') { + throw false; + } else if (x = this) { + var x = x; + } + return x === this; +})())