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+<!--
+
+/*
+** Copyright (c) 2013 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+-->
+
+<!-- author: Bill Baxter (wbaxter at google.com) -->
+
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>ANGLE WebGL Shader Conditionals Repro</title>
+<link rel="stylesheet" href="../../../resources/js-test-style.css"/>
+<script src="../../../js/js-test-pre.js"></script>
+<script src="../../../js/webgl-test-utils.js"></script>
+</head>
+
+<body>
+<canvas id="repro" style="border: none;" width="256" height="256"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+
+<script id="shader-vs" type="x-shader/x-vertex">
+attribute vec2 pos;
+varying mediump float varA;
+void main(void) {
+  varA = 0.;
+  gl_Position = vec4(pos, 0.0, 1.0);
+}
+</script>
+
+<script id="shader-fs" type="x-shader/x-fragment">
+precision mediump float;
+varying float varA;
+void main(void) {
+  if (varA < -1. || (varA < -1. && varA > 1.)) {
+    discard;
+  }
+  gl_FragColor = vec4(0, 1, 0, 1) + 2. * varA * 2.;
+}
+</script>
+
+<script id="shader-fs-mutable" type="x-shader/x-fragment">
+precision mediump float;
+varying float varA;
+void main(void) {
+  float b = varA;
+  if (varA < (b -= 1.) || (varA < b && varA > (b += 2.))) {
+    discard;
+  }
+  gl_FragColor = vec4(0, 1, 0, 1) + 2. * varA * 2.;
+}
+</script>
+<script id="shader-fs-unfolded" type="x-shader/x-fragment">
+precision mediump float;
+varying float varA;
+void main(void) {
+  bool s1 = varA < -1.;
+  if (!s1) {
+    bool s2 = varA < -1.;
+    if (s2) {
+      s2 = varA > 1.;
+    }
+    s1 = s2;
+  }
+  if (s1) {
+    discard;
+  }
+  gl_FragColor = vec4(0, 1, 0, 1) + 2. * varA * 2.;
+}
+</script>
+<script>
+"use strict";
+
+description();
+debug("");
+debug("If things are working correctly, then there will be a green square.");
+debug("Otherwise it will be a black void.");
+debug("This is a repro for an issue seen on the D3D9 ANGLE implementation of WebGL on Chrome in a shader with a conditional discard, where the conditional is of the form (a || (b && c)).");
+
+var wtu = WebGLTestUtils;
+var canvas = document.getElementById("repro");
+var gl = wtu.create3DContext(canvas);
+if (!gl) {
+  testFailed("context does not exist");
+} else {
+  gl.clearColor(0.0, 0.0, 0.0, 1.0);
+  wtu.setupUnitQuad(gl);
+
+  debug("");
+  debug("Testing shader with conditional discard");
+  gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+  var program = wtu.setupProgram(gl, ["shader-vs", "shader-fs"], ["pos"], undefined, true);
+  wtu.drawUnitQuad(gl);
+  wtu.checkCanvasRect(gl, 128, 128, 128, 128, [ 0, 255, 0, 255 ], "should be green", 1);
+
+  debug("");
+  debug("Testing conditional discard with side-effects in conditions");
+  gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+  var programMutable = wtu.setupProgram(gl, ["shader-vs", "shader-fs-mutable"], ["pos"], undefined, true);
+  wtu.drawUnitQuad(gl);
+  wtu.checkCanvasRect(gl, 128, 128, 128, 128, [ 0, 255, 0, 255 ], "should be green", 1);
+
+  debug("");
+  debug("Testing conditional discard with unfolded condition logic");
+  gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+  var programMutable = wtu.setupProgram(gl, ["shader-vs", "shader-fs-unfolded"], ["pos"], undefined, true);
+  wtu.drawUnitQuad(gl);
+  wtu.checkCanvasRect(gl, 128, 128, 128, 128, [ 0, 255, 0, 255 ], "should be green", 1);
+}
+
+var successfullyParsed = true;
+</script>
+<script src="../../../js/js-test-post.js"></script>
+</body>
+</html>