third_party/angle/src/tests/compiler_tests/UnfoldShortCircuitAST_test.cpp

//
// Copyright 2018 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.
//
// UnfoldShortCircuitAST_test.cpp:
//  Tests shader compilation with SH_UNFOLD_SHORT_CIRCUIT workaround on.

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

using namespace sh;

class UnfoldShortCircuitASTTest : public MatchOutputCodeTest
{
  public:
    UnfoldShortCircuitASTTest()
        : MatchOutputCodeTest(GL_FRAGMENT_SHADER, SH_UNFOLD_SHORT_CIRCUIT, SH_GLSL_330_CORE_OUTPUT)
    {}
};

// Test unfolding the && operator.
TEST_F(UnfoldShortCircuitASTTest, UnfoldAnd)
{
    const std::string &shaderString =
        R"(#version 300 es
        precision highp float;

        out vec4 color;
        uniform bool b;
        uniform bool b2;

        void main()
        {
            color = vec4(0, 0, 0, 1);
            if (b && b2)
            {
                color = vec4(0, 1, 0, 1);
            }
        })";
    compile(shaderString);
    ASSERT_TRUE(foundInCode("(_ub) ? (_ub2) : (false)"));
}

// Test unfolding the || operator.
TEST_F(UnfoldShortCircuitASTTest, UnfoldOr)
{
    const std::string &shaderString =
        R"(#version 300 es
        precision highp float;

        out vec4 color;
        uniform bool b;
        uniform bool b2;

        void main()
        {
            color = vec4(0, 0, 0, 1);
            if (b || b2)
            {
                color = vec4(0, 1, 0, 1);
            }
        })";
    compile(shaderString);
    ASSERT_TRUE(foundInCode("(_ub) ? (true) : (_ub2)"));
}

// Test unfolding nested && and || operators. Both should be unfolded.
TEST_F(UnfoldShortCircuitASTTest, UnfoldNested)
{
    const std::string &shaderString =
        R"(#version 300 es
        precision highp float;

        out vec4 color;
        uniform bool b;
        uniform bool b2;
        uniform bool b3;

        void main()
        {
            color = vec4(0, 0, 0, 1);
            if (b && (b2 || b3))
            {
                color = vec4(0, 1, 0, 1);
            }
        })";
    compile(shaderString);
    ASSERT_TRUE(foundInCode("(_ub) ? (((_ub2) ? (true) : (_ub3))) : (false)"));
}