chromium/third_party/angle/src/tests/compiler_tests/RecordConstantPrecision_test.cpp

//
// Copyright 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 "GLSLANG/ShaderLang.h"
#include "angle_gl.h"
#include "gtest/gtest.h"
#include "tests/test_utils/compiler_test.h"

usingnamespacesh;

class RecordConstantPrecisionTest : public MatchOutputCodeTest
{ … };

// The constant's precision must be specified if its precision is higher than the other operands,
// since it increases the precision of the consuming expression.
TEST_F(RecordConstantPrecisionTest, HigherPrecisionConstantAsParameter)
{ … }

// The constant's precision does not need to be specified if its precision is equal to the other
// operands, as it does not increase the precision of the consuming expression.  For simplicity
// however, the constant's precision is specified anyway.
TEST_F(RecordConstantPrecisionTest, EqualPrecisionConstantAsParameter)
{ … }

// The constant's precision must be specified 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)
{ … }

// The constant's precision must be specified 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)
{ … }

// The constant's precision must be specified 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 constructor expression.  Note that lowp constants never need their
// precision specified.
TEST_F(RecordConstantPrecisionTest, HigherPrecisionConstantInConstructor)
{ … }

// The constant's precision does not need to be specified if its used to initialize a variable.
TEST_F(RecordConstantPrecisionTest, HigherPrecisionConstantInAssignment)
{ … }

// The constant's precision does not need to be specified if its used as an index.
TEST_F(RecordConstantPrecisionTest, HigherPrecisionConstantInIndex)
{ … }