Add m-esr52 at 52.6.0

1 files changed, 95 insertions, 0 deletions

diff --git a/gfx/angle/src/tests/compiler_tests/RecordConstantPrecision_test.cpp b/gfx/angle/src/tests/compiler_tests/RecordConstantPrecision_test.cpp
new file mode 100755
index 000000000..2cd2bfdf4
--- /dev/null
+++ b/gfx/angle/src/tests/compiler_tests/RecordConstantPrecision_test.cpp
@@ -0,0 +1,95 @@
+//
+// Copyright (c) 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// RecordConstantPrecision_test.cpp:
+//   Test for recording constant variable precision when it affects consuming expression.
+//
+
+#include "angle_gl.h"
+#include "gtest/gtest.h"
+#include "GLSLANG/ShaderLang.h"
+#include "tests/test_utils/compiler_test.h"
+
+using namespace sh;
+
+class RecordConstantPrecisionTest : public MatchOutputCodeTest
+{
+  public:
+    RecordConstantPrecisionTest() : MatchOutputCodeTest(GL_FRAGMENT_SHADER, 0, SH_ESSL_OUTPUT) {}
+};
+
+// The constant cannot be folded if its precision is higher than the other operands, since it
+// increases the precision of the consuming expression.
+TEST_F(RecordConstantPrecisionTest, HigherPrecisionConstantAsParameter)
+{
+    const std::string &shaderString =
+        "uniform mediump float u;"
+        "void main()\n"
+        "{\n"
+        "    const highp float a = 4096.5;\n"
+        "    mediump float b = fract(a + u);\n"
+        "    gl_FragColor = vec4(b);\n"
+        "}\n";
+    compile(shaderString);
+    ASSERT_TRUE(foundInCode("const highp float webgl_angle_s"));
+    ASSERT_FALSE(foundInCode("fract(4096.5"));
+    ASSERT_FALSE(foundInCode("fract((4096.5"));
+}
+
+// The constant can be folded if its precision is equal to the other operands, as it does not
+// increase the precision of the consuming expression.
+TEST_F(RecordConstantPrecisionTest, EqualPrecisionConstantAsParameter)
+{
+    const std::string &shaderString =
+        "uniform mediump float u;"
+        "void main()\n"
+        "{\n"
+        "    const mediump float a = 4096.5;\n"
+        "    mediump float b = fract(a + u);\n"
+        "    gl_FragColor = vec4(b);\n"
+        "}\n";
+    compile(shaderString);
+    ASSERT_FALSE(foundInCode("const mediump float webgl_angle_s"));
+    ASSERT_TRUE(foundInCode("fract((4096.5"));
+}
+
+// The constant cannot be folded if its precision is higher than the other operands, since it
+// increases the precision of the consuming expression. This applies also when the constant is
+// part of a constant expression that can be folded.
+TEST_F(RecordConstantPrecisionTest, FoldedBinaryConstantPrecisionIsHigher)
+{
+    const std::string &shaderString =
+        "uniform mediump float u;"
+        "void main()\n"
+        "{\n"
+        "    const highp float a = 4095.5;\n"
+        "    mediump float b = fract((a + 1.0) + u);\n"
+        "    gl_FragColor = vec4(b);\n"
+        "}\n";
+    compile(shaderString);
+    ASSERT_TRUE(foundInCode("const highp float webgl_angle_s"));
+    ASSERT_FALSE(foundInCode("fract(4096.5"));
+    ASSERT_FALSE(foundInCode("fract((4096.5"));
+}
+
+
+// The constant cannot be folded if its precision is higher than the other operands, since it
+// increases the precision of the consuming expression. This applies also when the constant is
+// part of a constant expression that can be folded.
+TEST_F(RecordConstantPrecisionTest, FoldedUnaryConstantPrecisionIsHigher)
+{
+    const std::string &shaderString =
+        "uniform mediump float u;"
+        "void main()\n"
+        "{\n"
+        "    const highp float a = 0.5;\n"
+        "    mediump float b = sin(fract(a) + u);\n"
+        "    gl_FragColor = vec4(b);\n"
+        "}\n";
+    compile(shaderString);
+    ASSERT_TRUE(foundInCode("const highp float webgl_angle_s"));
+    ASSERT_FALSE(foundInCode("sin(0.5"));
+    ASSERT_FALSE(foundInCode("sin((0.5"));
+}