kc3-lang/angle/src/tests/compiler_tests/DebugShaderPrecision_test.cpp

Branch : - branch - main - tag -

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  Commit

• Author : Jamie Madill
  Date : 2019-09-24 08:44:09
  Hash : 273175cd
  Message : Fix Regex in DebugShaderPrecisionTest. One regex had an extra parenthesis. Also confirms that we can use raw string literals to produce more readable regexes. Bug: angleproject:3162 Change-Id: I82e6bc622a8fa3d9f6424c53cb7dcb4dddde368a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1821938 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

• src/tests/compiler_tests/DebugShaderPrecision_test.cpp

• //
  // Copyright 2014 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.
  //
  // DebugShaderPrecision_test.cpp:
  //   Tests for writing the code for shader precision emulation.
  //
  
  #include "GLSLANG/ShaderLang.h"
  #include "angle_gl.h"
  #include "gtest/gtest.h"
  #include "tests/test_utils/compiler_test.h"
  
  using namespace sh;
  
  class DebugShaderPrecisionTest : public MatchOutputCodeTest
  {
    public:
      DebugShaderPrecisionTest() : MatchOutputCodeTest(GL_FRAGMENT_SHADER, 0, SH_ESSL_OUTPUT)
      {
          addOutputType(SH_GLSL_COMPATIBILITY_OUTPUT);
  #if defined(ANGLE_ENABLE_HLSL)
          addOutputType(SH_HLSL_4_1_OUTPUT);
  #endif
          getResources()->WEBGL_debug_shader_precision = 1;
      }
  
    protected:
      bool foundInAllGLSLCode(const char *str)
      {
          return foundInCode(SH_GLSL_COMPATIBILITY_OUTPUT, str) && foundInCode(SH_ESSL_OUTPUT, str);
      }
  
      bool foundInHLSLCode(const char *stringToFind) const
      {
  #if defined(ANGLE_ENABLE_HLSL)
          return foundInCode(SH_HLSL_4_1_OUTPUT, stringToFind);
  #else
          return true;
  #endif
      }
  
      bool foundInHLSLCodeRegex(const char *regexToFind) const
      {
  #if defined(ANGLE_ENABLE_HLSL)
          return foundInCodeRegex(SH_HLSL_4_1_OUTPUT, std::regex(regexToFind));
  #else
          return true;
  #endif
      }
  };
  
  class NoDebugShaderPrecisionTest : public MatchOutputCodeTest
  {
    public:
      NoDebugShaderPrecisionTest()
          : MatchOutputCodeTest(GL_FRAGMENT_SHADER, 0, SH_GLSL_COMPATIBILITY_OUTPUT)
      {}
  };
  
  TEST_F(DebugShaderPrecisionTest, RoundingFunctionsDefined)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform float u;\n"
          "void main() {\n"
          "   gl_FragColor = vec4(u);\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInESSLCode("highp float angle_frm(in highp float"));
      ASSERT_TRUE(foundInESSLCode("highp vec2 angle_frm(in highp vec2"));
      ASSERT_TRUE(foundInESSLCode("highp vec3 angle_frm(in highp vec3"));
      ASSERT_TRUE(foundInESSLCode("highp vec4 angle_frm(in highp vec4"));
      ASSERT_TRUE(foundInESSLCode("highp mat2 angle_frm(in highp mat2"));
      ASSERT_TRUE(foundInESSLCode("highp mat3 angle_frm(in highp mat3"));
      ASSERT_TRUE(foundInESSLCode("highp mat4 angle_frm(in highp mat4"));
  
      ASSERT_TRUE(foundInESSLCode("highp float angle_frl(in highp float"));
      ASSERT_TRUE(foundInESSLCode("highp vec2 angle_frl(in highp vec2"));
      ASSERT_TRUE(foundInESSLCode("highp vec3 angle_frl(in highp vec3"));
      ASSERT_TRUE(foundInESSLCode("highp vec4 angle_frl(in highp vec4"));
      ASSERT_TRUE(foundInESSLCode("highp mat2 angle_frl(in highp mat2"));
      ASSERT_TRUE(foundInESSLCode("highp mat3 angle_frl(in highp mat3"));
      ASSERT_TRUE(foundInESSLCode("highp mat4 angle_frl(in highp mat4"));
  
      ASSERT_TRUE(foundInGLSLCode("float angle_frm(in float"));
      ASSERT_TRUE(foundInGLSLCode("vec2 angle_frm(in vec2"));
      ASSERT_TRUE(foundInGLSLCode("vec3 angle_frm(in vec3"));
      ASSERT_TRUE(foundInGLSLCode("vec4 angle_frm(in vec4"));
      ASSERT_TRUE(foundInGLSLCode("mat2 angle_frm(in mat2"));
      ASSERT_TRUE(foundInGLSLCode("mat3 angle_frm(in mat3"));
      ASSERT_TRUE(foundInGLSLCode("mat4 angle_frm(in mat4"));
  
      ASSERT_TRUE(foundInGLSLCode("float angle_frl(in float"));
      ASSERT_TRUE(foundInGLSLCode("vec2 angle_frl(in vec2"));
      ASSERT_TRUE(foundInGLSLCode("vec3 angle_frl(in vec3"));
      ASSERT_TRUE(foundInGLSLCode("vec4 angle_frl(in vec4"));
      ASSERT_TRUE(foundInGLSLCode("mat2 angle_frl(in mat2"));
      ASSERT_TRUE(foundInGLSLCode("mat3 angle_frl(in mat3"));
      ASSERT_TRUE(foundInGLSLCode("mat4 angle_frl(in mat4"));
  
      ASSERT_TRUE(foundInHLSLCode("float1 angle_frm(float1"));
      ASSERT_TRUE(foundInHLSLCode("float2 angle_frm(float2"));
      ASSERT_TRUE(foundInHLSLCode("float3 angle_frm(float3"));
      ASSERT_TRUE(foundInHLSLCode("float4 angle_frm(float4"));
      ASSERT_TRUE(foundInHLSLCode("float2x2 angle_frm(float2x2"));
      ASSERT_TRUE(foundInHLSLCode("float3x3 angle_frm(float3x3"));
      ASSERT_TRUE(foundInHLSLCode("float4x4 angle_frm(float4x4"));
  
      ASSERT_TRUE(foundInHLSLCode("float1 angle_frl(float1"));
      ASSERT_TRUE(foundInHLSLCode("float2 angle_frl(float2"));
      ASSERT_TRUE(foundInHLSLCode("float3 angle_frl(float3"));
      ASSERT_TRUE(foundInHLSLCode("float4 angle_frl(float4"));
      ASSERT_TRUE(foundInHLSLCode("float2x2 angle_frl(float2x2"));
      ASSERT_TRUE(foundInHLSLCode("float3x3 angle_frl(float3x3"));
      ASSERT_TRUE(foundInHLSLCode("float4x4 angle_frl(float4x4"));
  
      // Check that ESSL 3.00 rounding functions for non-square matrices are not defined.
      ASSERT_TRUE(notFoundInCode("mat2x"));
      ASSERT_TRUE(notFoundInCode("mat3x"));
      ASSERT_TRUE(notFoundInCode("mat4x"));
  }
  
  // Test that all ESSL 3.00 shaders get rounding function definitions for non-square matrices.
  TEST_F(DebugShaderPrecisionTest, NonSquareMatrixRoundingFunctionsDefinedES3)
  {
      const std::string &shaderString =
          "#version 300 es\n"
          "precision mediump float;\n"
          "uniform float u;\n"
          "out vec4 my_FragColor;\n"
          "void main() {\n"
          "   my_FragColor = vec4(u);\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInESSLCode("highp mat2x3 angle_frm(in highp mat2x3"));
      ASSERT_TRUE(foundInESSLCode("highp mat2x4 angle_frm(in highp mat2x4"));
      ASSERT_TRUE(foundInESSLCode("highp mat3x2 angle_frm(in highp mat3x2"));
      ASSERT_TRUE(foundInESSLCode("highp mat3x4 angle_frm(in highp mat3x4"));
      ASSERT_TRUE(foundInESSLCode("highp mat4x2 angle_frm(in highp mat4x2"));
      ASSERT_TRUE(foundInESSLCode("highp mat4x3 angle_frm(in highp mat4x3"));
  
      ASSERT_TRUE(foundInESSLCode("highp mat2x3 angle_frl(in highp mat2x3"));
      ASSERT_TRUE(foundInESSLCode("highp mat2x4 angle_frl(in highp mat2x4"));
      ASSERT_TRUE(foundInESSLCode("highp mat3x2 angle_frl(in highp mat3x2"));
      ASSERT_TRUE(foundInESSLCode("highp mat3x4 angle_frl(in highp mat3x4"));
      ASSERT_TRUE(foundInESSLCode("highp mat4x2 angle_frl(in highp mat4x2"));
      ASSERT_TRUE(foundInESSLCode("highp mat4x3 angle_frl(in highp mat4x3"));
  
      ASSERT_TRUE(foundInGLSLCode("mat2x3 angle_frm(in mat2x3"));
      ASSERT_TRUE(foundInGLSLCode("mat2x4 angle_frm(in mat2x4"));
      ASSERT_TRUE(foundInGLSLCode("mat3x2 angle_frm(in mat3x2"));
      ASSERT_TRUE(foundInGLSLCode("mat3x4 angle_frm(in mat3x4"));
      ASSERT_TRUE(foundInGLSLCode("mat4x2 angle_frm(in mat4x2"));
      ASSERT_TRUE(foundInGLSLCode("mat4x3 angle_frm(in mat4x3"));
  
      ASSERT_TRUE(foundInGLSLCode("mat2x3 angle_frl(in mat2x3"));
      ASSERT_TRUE(foundInGLSLCode("mat2x4 angle_frl(in mat2x4"));
      ASSERT_TRUE(foundInGLSLCode("mat3x2 angle_frl(in mat3x2"));
      ASSERT_TRUE(foundInGLSLCode("mat3x4 angle_frl(in mat3x4"));
      ASSERT_TRUE(foundInGLSLCode("mat4x2 angle_frl(in mat4x2"));
      ASSERT_TRUE(foundInGLSLCode("mat4x3 angle_frl(in mat4x3"));
  
      ASSERT_TRUE(foundInHLSLCode("float2x3 angle_frm(float2x3"));
      ASSERT_TRUE(foundInHLSLCode("float2x4 angle_frm(float2x4"));
      ASSERT_TRUE(foundInHLSLCode("float3x2 angle_frm(float3x2"));
      ASSERT_TRUE(foundInHLSLCode("float3x4 angle_frm(float3x4"));
      ASSERT_TRUE(foundInHLSLCode("float4x2 angle_frm(float4x2"));
      ASSERT_TRUE(foundInHLSLCode("float4x3 angle_frm(float4x3"));
  
      ASSERT_TRUE(foundInHLSLCode("float2x3 angle_frl(float2x3"));
      ASSERT_TRUE(foundInHLSLCode("float2x4 angle_frl(float2x4"));
      ASSERT_TRUE(foundInHLSLCode("float3x2 angle_frl(float3x2"));
      ASSERT_TRUE(foundInHLSLCode("float3x4 angle_frl(float3x4"));
      ASSERT_TRUE(foundInHLSLCode("float4x2 angle_frl(float4x2"));
      ASSERT_TRUE(foundInHLSLCode("float4x3 angle_frl(float4x3"));
  }
  
  TEST_F(DebugShaderPrecisionTest, PragmaDisablesEmulation)
  {
      const std::string &shaderString =
          "#pragma webgl_debug_shader_precision(off)\n"
          "precision mediump float;\n"
          "uniform float u;\n"
          "void main() {\n"
          "   gl_FragColor = vec4(u);\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(notFoundInCode("angle_frm"));
      const std::string &shaderStringPragmaOn =
          "#pragma webgl_debug_shader_precision(on)\n"
          "precision mediump float;\n"
          "uniform float u;\n"
          "void main() {\n"
          "   gl_FragColor = vec4(u);\n"
          "}\n";
      compile(shaderStringPragmaOn);
      ASSERT_TRUE(foundInCode("angle_frm"));
  }
  
  // Emulation can't be toggled on for only a part of a shader.
  // Only the last pragma in the shader has an effect.
  TEST_F(DebugShaderPrecisionTest, MultiplePragmas)
  {
      const std::string &shaderString =
          "#pragma webgl_debug_shader_precision(off)\n"
          "precision mediump float;\n"
          "uniform float u;\n"
          "void main() {\n"
          "   gl_FragColor = vec4(u);\n"
          "}\n"
          "#pragma webgl_debug_shader_precision(on)\n";
      compile(shaderString);
      ASSERT_TRUE(foundInCode("angle_frm"));
  }
  
  TEST_F(NoDebugShaderPrecisionTest, HelpersWrittenOnlyWithExtension)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform float u;\n"
          "void main() {\n"
          "   gl_FragColor = vec4(u);\n"
          "}\n";
      compile(shaderString);
      ASSERT_FALSE(foundInCode("angle_frm"));
  }
  
  TEST_F(NoDebugShaderPrecisionTest, PragmaHasEffectsOnlyWithExtension)
  {
      const std::string &shaderString =
          "#pragma webgl_debug_shader_precision(on)\n"
          "precision mediump float;\n"
          "uniform float u;\n"
          "void main() {\n"
          "   gl_FragColor = vec4(u);\n"
          "}\n";
      compile(shaderString);
      ASSERT_FALSE(foundInCode("angle_frm"));
  }
  
  TEST_F(DebugShaderPrecisionTest, DeclarationsAndConstants)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 f;\n"
          "uniform float uu, uu2;\n"
          "varying float vv, vv2;\n"
          "float gg = 0.0, gg2;\n"
          "void main() {\n"
          "   float aa = 0.0, aa2;\n"
          "   gl_FragColor = f;\n"
          "}\n";
      compile(shaderString);
      // Declarations or constants should not have rounding inserted around them
      ASSERT_TRUE(notFoundInCode("angle_frm(0"));
      // GLSL output
      ASSERT_TRUE(notFoundInCode("angle_frm(_uuu"));
      ASSERT_TRUE(notFoundInCode("angle_frm(_uvv"));
      ASSERT_TRUE(notFoundInCode("angle_frm(_ugg"));
      ASSERT_TRUE(notFoundInCode("angle_frm(_uaa"));
      // HLSL output
      ASSERT_TRUE(notFoundInCode("angle_frm(_uu"));
      ASSERT_TRUE(notFoundInCode("angle_frm(_vv"));
      ASSERT_TRUE(notFoundInCode("angle_frm(_gg"));
      ASSERT_TRUE(notFoundInCode("angle_frm(_aa"));
  }
  
  // Test that expressions that are part of initialization have rounding.
  TEST_F(DebugShaderPrecisionTest, InitializerRounding)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform float u;\n"
          "void main() {\n"
          "   float a = u;\n"
          "   gl_FragColor = vec4(a);\n"
          "}\n";
      compile(shaderString);
      // An expression that's part of initialization should have rounding
      ASSERT_TRUE(foundInAllGLSLCode("angle_frm(_uu)"));
      ASSERT_TRUE(foundInHLSLCode("angle_frm(_u)"));
  }
  
  // Test that compound additions have rounding in the GLSL translations.
  TEST_F(DebugShaderPrecisionTest, CompoundAddFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u;\n"
          "uniform vec4 u2;\n"
          "void main() {\n"
          "   vec4 v = u;\n"
          "   v += u2;\n"
          "   gl_FragColor = v;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(
          foundInESSLCode("highp vec4 angle_compound_add_frm(inout highp vec4 x, in highp vec4 y) {\n"
                          "    x = angle_frm(angle_frm(x) + y);"));
      ASSERT_TRUE(
          foundInGLSLCode("vec4 angle_compound_add_frm(inout vec4 x, in vec4 y) {\n"
                          "    x = angle_frm(angle_frm(x) + y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float4 angle_compound_add_frm(inout float4 x, in float4 y) {\n"
                          "    x = angle_frm(angle_frm(x) + y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_add_frm(_uv, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex(R"(angle_compound_add_frm\(_v(\d)*, angle_frm\(_u2\)\);)"));
      ASSERT_TRUE(notFoundInCode("+="));
  }
  
  TEST_F(DebugShaderPrecisionTest, CompoundSubFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u;\n"
          "uniform vec4 u2;\n"
          "void main() {\n"
          "   vec4 v = u;\n"
          "   v -= u2;\n"
          "   gl_FragColor = v;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(
          foundInESSLCode("highp vec4 angle_compound_sub_frm(inout highp vec4 x, in highp vec4 y) {\n"
                          "    x = angle_frm(angle_frm(x) - y);"));
      ASSERT_TRUE(
          foundInGLSLCode("vec4 angle_compound_sub_frm(inout vec4 x, in vec4 y) {\n"
                          "    x = angle_frm(angle_frm(x) - y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float4 angle_compound_sub_frm(inout float4 x, in float4 y) {\n"
                          "    x = angle_frm(angle_frm(x) - y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_sub_frm(_uv, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex("angle_compound_sub_frm\\(_v(\\d)*, angle_frm\\(_u2\\)\\);"));
      ASSERT_TRUE(notFoundInCode("-="));
  }
  
  TEST_F(DebugShaderPrecisionTest, CompoundDivFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u;\n"
          "uniform vec4 u2;\n"
          "void main() {\n"
          "   vec4 v = u;\n"
          "   v /= u2;\n"
          "   gl_FragColor = v;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(
          foundInESSLCode("highp vec4 angle_compound_div_frm(inout highp vec4 x, in highp vec4 y) {\n"
                          "    x = angle_frm(angle_frm(x) / y);"));
      ASSERT_TRUE(
          foundInGLSLCode("vec4 angle_compound_div_frm(inout vec4 x, in vec4 y) {\n"
                          "    x = angle_frm(angle_frm(x) / y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float4 angle_compound_div_frm(inout float4 x, in float4 y) {\n"
                          "    x = angle_frm(angle_frm(x) / y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_div_frm(_uv, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex("angle_compound_div_frm\\(_v(\\d)*, angle_frm\\(_u2\\)\\);"));
      ASSERT_TRUE(notFoundInCode("/="));
  }
  
  TEST_F(DebugShaderPrecisionTest, CompoundMulFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u;\n"
          "uniform vec4 u2;\n"
          "void main() {\n"
          "   vec4 v = u;\n"
          "   v *= u2;\n"
          "   gl_FragColor = v;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(
          foundInESSLCode("highp vec4 angle_compound_mul_frm(inout highp vec4 x, in highp vec4 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInGLSLCode("vec4 angle_compound_mul_frm(inout vec4 x, in vec4 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float4 angle_compound_mul_frm(inout float4 x, in float4 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_mul_frm(_uv, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex("angle_compound_mul_frm\\(_v(\\d)*, angle_frm\\(_u2\\)\\);"));
      ASSERT_TRUE(notFoundInCode("*="));
  }
  
  TEST_F(DebugShaderPrecisionTest, CompoundAddVectorPlusScalarFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u;\n"
          "uniform float u2;\n"
          "void main() {\n"
          "   vec4 v = u;\n"
          "   v += u2;\n"
          "   gl_FragColor = v;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInESSLCode(
          "highp vec4 angle_compound_add_frm(inout highp vec4 x, in highp float y) {\n"
          "    x = angle_frm(angle_frm(x) + y);"));
      ASSERT_TRUE(
          foundInGLSLCode("vec4 angle_compound_add_frm(inout vec4 x, in float y) {\n"
                          "    x = angle_frm(angle_frm(x) + y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float4 angle_compound_add_frm(inout float4 x, in float y) {\n"
                          "    x = angle_frm(angle_frm(x) + y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_add_frm(_uv, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex("angle_compound_add_frm\\(_v(\\d)*, angle_frm\\(_u2\\)\\);"));
      ASSERT_TRUE(notFoundInCode("+="));
  }
  
  TEST_F(DebugShaderPrecisionTest, CompoundMatrixTimesMatrixFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform mat4 u;\n"
          "uniform mat4 u2;\n"
          "void main() {\n"
          "   mat4 m = u;\n"
          "   m *= u2;\n"
          "   gl_FragColor = m[0];\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(
          foundInESSLCode("highp mat4 angle_compound_mul_frm(inout highp mat4 x, in highp mat4 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInGLSLCode("mat4 angle_compound_mul_frm(inout mat4 x, in mat4 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float4x4 angle_compound_mul_frm(inout float4x4 x, in float4x4 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_mul_frm(_um, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex("angle_compound_mul_frm\\(_m(\\d)*, angle_frm\\(_u2\\)\\);"));
      ASSERT_TRUE(notFoundInCode("*="));
  }
  
  // Test that compound multiplying a non-square matrix with another matrix gets translated into an
  // angle_compound_mul function call.
  TEST_F(DebugShaderPrecisionTest, CompoundNonSquareMatrixTimesMatrixFunction)
  {
      const std::string &shaderString =
          "#version 300 es\n"
          "precision mediump float;\n"
          "uniform mat2x4 u;\n"
          "uniform mat2 u2;\n"
          "out vec4 my_FragColor;\n"
          "void main() {\n"
          "   mat2x4 m = u;\n"
          "   m *= u2;\n"
          "   my_FragColor = m[0];\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInESSLCode(
          "highp mat2x4 angle_compound_mul_frm(inout highp mat2x4 x, in highp mat2 y) {\n"
          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInGLSLCode("mat2x4 angle_compound_mul_frm(inout mat2x4 x, in mat2 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float2x4 angle_compound_mul_frm(inout float2x4 x, in float2x2 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_mul_frm(_um, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex("angle_compound_mul_frm\\(_m(\\d)*, angle_frm\\(_u2\\)\\);"));
      ASSERT_TRUE(notFoundInCode("*="));
  }
  
  TEST_F(DebugShaderPrecisionTest, CompoundMatrixTimesScalarFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform mat4 u;\n"
          "uniform float u2;\n"
          "void main() {\n"
          "   mat4 m = u;\n"
          "   m *= u2;\n"
          "   gl_FragColor = m[0];\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInESSLCode(
          "highp mat4 angle_compound_mul_frm(inout highp mat4 x, in highp float y) {\n"
          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInGLSLCode("mat4 angle_compound_mul_frm(inout mat4 x, in float y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float4x4 angle_compound_mul_frm(inout float4x4 x, in float y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_mul_frm(_um, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex("angle_compound_mul_frm\\(_m(\\d)*, angle_frm\\(_u2\\)\\);"));
      ASSERT_TRUE(notFoundInCode("*="));
  }
  
  TEST_F(DebugShaderPrecisionTest, CompoundVectorTimesMatrixFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u;\n"
          "uniform mat4 u2;\n"
          "void main() {\n"
          "   vec4 v = u;\n"
          "   v *= u2;\n"
          "   gl_FragColor = v;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(
          foundInESSLCode("highp vec4 angle_compound_mul_frm(inout highp vec4 x, in highp mat4 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInGLSLCode("vec4 angle_compound_mul_frm(inout vec4 x, in mat4 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float4 angle_compound_mul_frm(inout float4 x, in float4x4 y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_mul_frm(_uv, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex("angle_compound_mul_frm\\(_v(\\d)*, angle_frm\\(_u2\\)\\);"));
      ASSERT_TRUE(notFoundInCode("*="));
  }
  
  TEST_F(DebugShaderPrecisionTest, CompoundVectorTimesScalarFunction)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u;\n"
          "uniform float u2;\n"
          "void main() {\n"
          "   vec4 v = u;\n"
          "   v *= u2;\n"
          "   gl_FragColor = v;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInESSLCode(
          "highp vec4 angle_compound_mul_frm(inout highp vec4 x, in highp float y) {\n"
          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInGLSLCode("vec4 angle_compound_mul_frm(inout vec4 x, in float y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(
          foundInHLSLCode("float4 angle_compound_mul_frm(inout float4 x, in float y) {\n"
                          "    x = angle_frm(angle_frm(x) * y);"));
      ASSERT_TRUE(foundInAllGLSLCode("angle_compound_mul_frm(_uv, angle_frm(_uu2));"));
      ASSERT_TRUE(foundInHLSLCodeRegex("angle_compound_mul_frm\\(_v(\\d)*, angle_frm\\(_u2\\)\\);"));
      ASSERT_TRUE(notFoundInCode("*="));
  }
  
  TEST_F(DebugShaderPrecisionTest, BinaryMathRounding)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u1;\n"
          "uniform vec4 u2;\n"
          "uniform vec4 u3;\n"
          "uniform vec4 u4;\n"
          "uniform vec4 u5;\n"
          "void main() {\n"
          "   vec4 v1 = u1 + u2;\n"
          "   vec4 v2 = u2 - u3;\n"
          "   vec4 v3 = u3 * u4;\n"
          "   vec4 v4 = u4 / u5;\n"
          "   vec4 v5;\n"
          "   vec4 v6 = (v5 = u5);\n"
          "   gl_FragColor = v1 + v2 + v3 + v4;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("v1 = angle_frm((angle_frm(_uu1) + angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v2 = angle_frm((angle_frm(_uu2) - angle_frm(_uu3)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v3 = angle_frm((angle_frm(_uu3) * angle_frm(_uu4)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v4 = angle_frm((angle_frm(_uu4) / angle_frm(_uu5)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v6 = angle_frm((_uv5 = angle_frm(_uu5)))"));
  
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v1(\\d)* = angle_frm\\(\\(angle_frm\\(_u1\\) \\+ angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v2(\\d)* = angle_frm\\(\\(angle_frm\\(_u2\\) - angle_frm\\(_u3\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v3(\\d)* = angle_frm\\(\\(angle_frm\\(_u3\\) \\* angle_frm\\(_u4\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v4(\\d)* = angle_frm\\(\\(angle_frm\\(_u4\\) / angle_frm\\(_u5\\)\\)\\)"));
      ASSERT_TRUE(
          foundInHLSLCodeRegex("v6(\\d)* = angle_frm\\(\\(_v5(\\d)* = angle_frm\\(_u5\\)\\)\\)"));
  }
  
  TEST_F(DebugShaderPrecisionTest, BuiltInMathFunctionRounding)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u1;\n"
          "uniform vec4 u2;\n"
          "uniform vec4 u3;\n"
          "uniform float uf;\n"
          "uniform float uf2;\n"
          "uniform vec3 uf31;\n"
          "uniform vec3 uf32;\n"
          "uniform mat4 um1;\n"
          "uniform mat4 um2;\n"
          "void main() {\n"
          "   vec4 v1 = radians(u1);\n"
          "   vec4 v2 = degrees(u1);\n"
          "   vec4 v3 = sin(u1);\n"
          "   vec4 v4 = cos(u1);\n"
          "   vec4 v5 = tan(u1);\n"
          "   vec4 v6 = asin(u1);\n"
          "   vec4 v7 = acos(u1);\n"
          "   vec4 v8 = atan(u1);\n"
          "   vec4 v9 = atan(u1, u2);\n"
          "   vec4 v10 = pow(u1, u2);\n"
          "   vec4 v11 = exp(u1);\n"
          "   vec4 v12 = log(u1);\n"
          "   vec4 v13 = exp2(u1);\n"
          "   vec4 v14 = log2(u1);\n"
          "   vec4 v15 = sqrt(u1);\n"
          "   vec4 v16 = inversesqrt(u1);\n"
          "   vec4 v17 = abs(u1);\n"
          "   vec4 v18 = sign(u1);\n"
          "   vec4 v19 = floor(u1);\n"
          "   vec4 v20 = ceil(u1);\n"
          "   vec4 v21 = fract(u1);\n"
          "   vec4 v22 = mod(u1, uf);\n"
          "   vec4 v23 = mod(u1, u2);\n"
          "   vec4 v24 = min(u1, uf);\n"
          "   vec4 v25 = min(u1, u2);\n"
          "   vec4 v26 = max(u1, uf);\n"
          "   vec4 v27 = max(u1, u2);\n"
          "   vec4 v28 = clamp(u1, u2, u3);\n"
          "   vec4 v29 = clamp(u1, uf, uf2);\n"
          "   vec4 v30 = mix(u1, u2, u3);\n"
          "   vec4 v31 = mix(u1, u2, uf);\n"
          "   vec4 v32 = step(u1, u2);\n"
          "   vec4 v33 = step(uf, u1);\n"
          "   vec4 v34 = smoothstep(u1, u2, u3);\n"
          "   vec4 v35 = smoothstep(uf, uf2, u1);\n"
          "   vec4 v36 = normalize(u1);\n"
          "   vec4 v37 = faceforward(u1, u2, u3);\n"
          "   vec4 v38 = reflect(u1, u2);\n"
          "   vec4 v39 = refract(u1, u2, uf);\n"
  
          "   float f1 = length(u1);\n"
          "   float f2 = distance(u1, u2);\n"
          "   float f3 = dot(u1, u2);\n"
          "   vec3 vf31 = cross(uf31, uf32);\n"
          "   mat4 m1 = matrixCompMult(um1, um2);\n"
  
          "   gl_FragColor = v1 + v2 + v3 + v4 + v5 + v6 + v7 + v8 + v9 + v10 +"
          "v11 + v12 + v13 + v14 + v15 + v16 + v17 + v18 + v19 + v20 +"
          "v21 + v22 + v23 + v24 + v25 + v26 + v27 + v28 + v29 + v30 +"
          "v31 + v32 + v33 + v34 + v35 + v36 + v37 + v38 + v39 +"
          "vec4(f1, f2, f3, 0.0) + vec4(vf31, 0.0) + m1[0];\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("v1 = angle_frm(radians(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v2 = angle_frm(degrees(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v3 = angle_frm(sin(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v4 = angle_frm(cos(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v5 = angle_frm(tan(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v6 = angle_frm(asin(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v7 = angle_frm(acos(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v8 = angle_frm(atan(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v9 = angle_frm(atan(angle_frm(_uu1), angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v10 = angle_frm(pow(angle_frm(_uu1), angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v11 = angle_frm(exp(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v12 = angle_frm(log(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v13 = angle_frm(exp2(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v14 = angle_frm(log2(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v15 = angle_frm(sqrt(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v16 = angle_frm(inversesqrt(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v17 = angle_frm(abs(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v18 = angle_frm(sign(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v19 = angle_frm(floor(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v20 = angle_frm(ceil(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v21 = angle_frm(fract(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v22 = angle_frm(mod(angle_frm(_uu1), angle_frm(_uuf)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v23 = angle_frm(mod(angle_frm(_uu1), angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v24 = angle_frm(min(angle_frm(_uu1), angle_frm(_uuf)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v25 = angle_frm(min(angle_frm(_uu1), angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v26 = angle_frm(max(angle_frm(_uu1), angle_frm(_uuf)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v27 = angle_frm(max(angle_frm(_uu1), angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInAllGLSLCode(
          "v28 = angle_frm(clamp(angle_frm(_uu1), angle_frm(_uu2), angle_frm(_uu3)))"));
      ASSERT_TRUE(foundInAllGLSLCode(
          "v29 = angle_frm(clamp(angle_frm(_uu1), angle_frm(_uuf), angle_frm(_uuf2)))"));
      ASSERT_TRUE(foundInAllGLSLCode(
          "v30 = angle_frm(mix(angle_frm(_uu1), angle_frm(_uu2), angle_frm(_uu3)))"));
      ASSERT_TRUE(foundInAllGLSLCode(
          "v31 = angle_frm(mix(angle_frm(_uu1), angle_frm(_uu2), angle_frm(_uuf)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v32 = angle_frm(step(angle_frm(_uu1), angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v33 = angle_frm(step(angle_frm(_uuf), angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode(
          "v34 = angle_frm(smoothstep(angle_frm(_uu1), angle_frm(_uu2), angle_frm(_uu3)))"));
      ASSERT_TRUE(foundInAllGLSLCode(
          "v35 = angle_frm(smoothstep(angle_frm(_uuf), angle_frm(_uuf2), angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v36 = angle_frm(normalize(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode(
          "v37 = angle_frm(faceforward(angle_frm(_uu1), angle_frm(_uu2), angle_frm(_uu3)))"));
      ASSERT_TRUE(foundInAllGLSLCode("v38 = angle_frm(reflect(angle_frm(_uu1), angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInAllGLSLCode(
          "v39 = angle_frm(refract(angle_frm(_uu1), angle_frm(_uu2), angle_frm(_uuf)))"));
  
      ASSERT_TRUE(foundInAllGLSLCode("f1 = angle_frm(length(angle_frm(_uu1)))"));
      ASSERT_TRUE(foundInAllGLSLCode("f2 = angle_frm(distance(angle_frm(_uu1), angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInAllGLSLCode("f3 = angle_frm(dot(angle_frm(_uu1), angle_frm(_uu2)))"));
      ASSERT_TRUE(
          foundInAllGLSLCode("vf31 = angle_frm(cross(angle_frm(_uuf31), angle_frm(_uuf32)))"));
      ASSERT_TRUE(
          foundInAllGLSLCode("m1 = angle_frm(matrixCompMult(angle_frm(_uum1), angle_frm(_uum2)))"));
  
      ASSERT_TRUE(foundInHLSLCodeRegex("v1(\\d)* = angle_frm\\(radians\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v2(\\d)* = angle_frm\\(degrees\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v3(\\d)* = angle_frm\\(sin\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v4(\\d)* = angle_frm\\(cos\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v5(\\d)* = angle_frm\\(tan\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v6(\\d)* = angle_frm\\(asin\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v7(\\d)* = angle_frm\\(acos\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v8(\\d)* = angle_frm\\(atan\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v9(\\d)* = angle_frm\\(atan_emu\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v10(\\d)* = angle_frm\\(pow\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v11(\\d)* = angle_frm\\(exp\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v12(\\d)* = angle_frm\\(log\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v13(\\d)* = angle_frm\\(exp2\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v14(\\d)* = angle_frm\\(log2\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v15(\\d)* = angle_frm\\(sqrt\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v16(\\d)* = angle_frm\\(rsqrt\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v17(\\d)* = angle_frm\\(abs\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v18(\\d)* = angle_frm\\(sign\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v19(\\d)* = angle_frm\\(floor\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v20(\\d)* = angle_frm\\(ceil\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v21(\\d)* = angle_frm\\(frac\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v22(\\d)* = angle_frm\\(mod_emu\\(angle_frm\\(_u1\\), angle_frm\\(_uf\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v23(\\d)* = angle_frm\\(mod_emu\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v24(\\d)* = angle_frm\\(min\\(angle_frm\\(_u1\\), angle_frm\\(_uf\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v25(\\d)* = angle_frm\\(min\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v26(\\d)* = angle_frm\\(max\\(angle_frm\\(_u1\\), angle_frm\\(_uf\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v27(\\d)* = angle_frm\\(max\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v28(\\d)* = angle_frm\\(clamp\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\), "
          "angle_frm\\(_u3\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v29(\\d)* = angle_frm\\(clamp\\(angle_frm\\(_u1\\), angle_frm\\(_uf\\), "
          "angle_frm\\(_uf2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v30(\\d)* = angle_frm\\(lerp\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\), "
          "angle_frm\\(_u3\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v31(\\d)* = angle_frm\\(lerp\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\), "
          "angle_frm\\(_uf\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v32(\\d)* = angle_frm\\(step\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v33(\\d)* = angle_frm\\(step\\(angle_frm\\(_uf\\), angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(
          foundInHLSLCodeRegex("v34(\\d)* = angle_frm\\(smoothstep\\(angle_frm\\(_u1\\), "
                               "angle_frm\\(_u2\\), angle_frm\\(_u3\\)\\)\\)"));
      ASSERT_TRUE(
          foundInHLSLCodeRegex("v35(\\d)* = angle_frm\\(smoothstep\\(angle_frm\\(_uf\\), "
                               "angle_frm\\(_uf2\\), angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(
          foundInHLSLCodeRegex("v36(\\d)* = angle_frm\\(normalize\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(
          foundInHLSLCodeRegex("v37(\\d)* = angle_frm\\(faceforward_emu\\(angle_frm\\(_u1\\), "
                               "angle_frm\\(_u2\\), angle_frm\\(_u3\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v38(\\d)* = angle_frm\\(reflect\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(
          foundInHLSLCodeRegex("v39(\\d)* = angle_frm\\(refract\\(angle_frm\\(_u1\\), "
                               "angle_frm\\(_u2\\), angle_frm\\(_uf\\)\\)\\)"));
  
      ASSERT_TRUE(foundInHLSLCodeRegex("f1(\\d)* = angle_frm\\(length\\(angle_frm\\(_u1\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "f2(\\d)* = angle_frm\\(distance\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "f3(\\d)* = angle_frm\\(dot\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "vf31(\\d)* = angle_frm\\(cross\\(angle_frm\\(_uf31\\), angle_frm\\(_uf32\\)\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "m1(\\d)* = angle_frm\\(\\(angle_frm\\(_um1\\) \\* angle_frm\\(_um2\\)\\)\\)"));
  }
  
  TEST_F(DebugShaderPrecisionTest, BuiltInRelationalFunctionRounding)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u1;\n"
          "uniform vec4 u2;\n"
          "void main() {\n"
          "   bvec4 bv1 = lessThan(u1, u2);\n"
          "   bvec4 bv2 = lessThanEqual(u1, u2);\n"
          "   bvec4 bv3 = greaterThan(u1, u2);\n"
          "   bvec4 bv4 = greaterThanEqual(u1, u2);\n"
          "   bvec4 bv5 = equal(u1, u2);\n"
          "   bvec4 bv6 = notEqual(u1, u2);\n"
          "   gl_FragColor = vec4(bv1) + vec4(bv2) + vec4(bv3) + vec4(bv4) + vec4(bv5) + vec4(bv6);\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("bv1 = lessThan(angle_frm(_uu1), angle_frm(_uu2))"));
      ASSERT_TRUE(foundInAllGLSLCode("bv2 = lessThanEqual(angle_frm(_uu1), angle_frm(_uu2))"));
      ASSERT_TRUE(foundInAllGLSLCode("bv3 = greaterThan(angle_frm(_uu1), angle_frm(_uu2))"));
      ASSERT_TRUE(foundInAllGLSLCode("bv4 = greaterThanEqual(angle_frm(_uu1), angle_frm(_uu2))"));
      ASSERT_TRUE(foundInAllGLSLCode("bv5 = equal(angle_frm(_uu1), angle_frm(_uu2))"));
      ASSERT_TRUE(foundInAllGLSLCode("bv6 = notEqual(angle_frm(_uu1), angle_frm(_uu2))"));
  
      ASSERT_TRUE(foundInHLSLCodeRegex("bv1(\\d)* = \\(angle_frm\\(_u1\\) < angle_frm\\(_u2\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("bv2(\\d)* = \\(angle_frm\\(_u1\\) <= angle_frm\\(_u2\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("bv3(\\d)* = \\(angle_frm\\(_u1\\) > angle_frm\\(_u2\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("bv4(\\d)* = \\(angle_frm\\(_u1\\) >= angle_frm\\(_u2\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("bv5(\\d)* = \\(angle_frm\\(_u1\\) == angle_frm\\(_u2\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("bv6(\\d)* = \\(angle_frm\\(_u1\\) != angle_frm\\(_u2\\)\\)"));
  }
  
  TEST_F(DebugShaderPrecisionTest, ConstructorRounding)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "precision mediump int;\n"
          "uniform float u1;\n"
          "uniform float u2;\n"
          "uniform lowp float u3;\n"
          "uniform float u4;\n"
          "uniform ivec4 uiv;\n"
          "void main() {\n"
          "   vec4 v1 = vec4(u1, u2, u3, u4);\n"
          "   vec4 v2 = vec4(uiv);\n"
          "   gl_FragColor = v1 + v2;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("v1 = angle_frm(vec4(_uu1, _uu2, angle_frl(_uu3), _uu4))"));
      ASSERT_TRUE(foundInAllGLSLCode("v2 = angle_frm(vec4(_uuiv))"));
  
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v1(\\d)* = angle_frm\\(vec4_ctor\\(_u1, _u2, angle_frl\\(_u3\\), _u4\\)\\)"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v2(\\d)* = angle_frm\\(vec4_ctor\\(_uiv\\)\\)"));
  }
  
  TEST_F(DebugShaderPrecisionTest, StructConstructorNoRounding)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "struct S { mediump vec4 a; };\n"
          "uniform vec4 u;\n"
          "void main() {\n"
          "   S s = S(u);\n"
          "   gl_FragColor = s.a;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("s = _uS(angle_frm(_uu))"));
      ASSERT_TRUE(foundInHLSLCodeRegex("s(\\d)* = _S_ctor\\(angle_frm\\(_u\\)\\)"));
      ASSERT_TRUE(notFoundInCode("angle_frm(_uS"));  // GLSL
      ASSERT_TRUE(notFoundInCode("angle_frm(_S"));   // HLSL
  }
  
  TEST_F(DebugShaderPrecisionTest, SwizzleRounding)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u;\n"
          "void main() {\n"
          "   vec4 v = u.xyxy;"
          "   gl_FragColor = v;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("v = angle_frm(_uu).xyxy"));
      ASSERT_TRUE(foundInHLSLCodeRegex("v(\\d)* = angle_frm\\(_u\\)\\.xyxy"));
  }
  
  TEST_F(DebugShaderPrecisionTest, BuiltInTexFunctionRounding)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "precision lowp sampler2D;\n"
          "uniform vec2 u;\n"
          "uniform sampler2D s;\n"
          "void main() {\n"
          "   lowp vec4 v = texture2D(s, u);\n"
          "   gl_FragColor = v;\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("v = angle_frl(texture2D(_us, angle_frm(_uu)))"));
      ASSERT_TRUE(
          foundInHLSLCodeRegex("v(\\d)* = angle_frl\\(gl_texture2D\\(_s, angle_frm\\(_u\\)\\)\\)"));
  }
  
  TEST_F(DebugShaderPrecisionTest, FunctionCallParameterQualifiersFromDefinition)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u1;\n"
          "uniform vec4 u2;\n"
          "uniform vec4 u3;\n"
          "uniform vec4 u4;\n"
          "uniform vec4 u5;\n"
          "vec4 add(in vec4 x, in vec4 y) {\n"
          "   return x + y;\n"
          "}\n"
          "void compound_add(inout vec4 x, in vec4 y) {\n"
          "   x = x + y;\n"
          "}\n"
          "void add_to_last(in vec4 x, in vec4 y, out vec4 z) {\n"
          "   z = x + y;\n"
          "}\n"
          "void main() {\n"
          "   vec4 v = add(u1, u2);\n"
          "   compound_add(v, u3);\n"
          "   vec4 v2;\n"
          "   add_to_last(u4, u5, v2);\n"
          "   gl_FragColor = v + v2;\n"
          "}\n";
      compile(shaderString);
      // Note that this is not optimal code, there are redundant frm calls.
      // However, getting the implementation working when other operations
      // are nested within function calls would be tricky if to get right
      // otherwise.
      // Test in parameters
      ASSERT_TRUE(foundInAllGLSLCode("v = _uadd(angle_frm(_uu1), angle_frm(_uu2))"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v(\\d)* = f_add_float4_float4\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)"));
      // Test inout parameter
      ASSERT_TRUE(foundInAllGLSLCode("_ucompound_add(_uv, angle_frm(_uu3))"));
      ASSERT_TRUE(
          foundInHLSLCodeRegex("compound_add_float4_float4\\(_v(\\d)*, angle_frm\\(_u3\\)\\)"));
      // Test out parameter
      ASSERT_TRUE(foundInAllGLSLCode("_uadd_to_last(angle_frm(_uu4), angle_frm(_uu5), _uv2)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "add_to_last_float4_float4_float4\\(angle_frm\\(_u4\\), angle_frm\\(_u5\\), _v2(\\d)*\\)"));
  }
  
  TEST_F(DebugShaderPrecisionTest, FunctionCallParameterQualifiersFromPrototype)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u1;\n"
          "uniform vec4 u2;\n"
          "uniform vec4 u3;\n"
          "uniform vec4 u4;\n"
          "uniform vec4 u5;\n"
          "vec4 add(in vec4 x, in vec4 y);\n"
          "void compound_add(inout vec4 x, in vec4 y);\n"
          "void add_to_last(in vec4 x, in vec4 y, out vec4 z);\n"
          "void main() {\n"
          "   vec4 v = add(u1, u2);\n"
          "   compound_add(v, u3);\n"
          "   vec4 v2;\n"
          "   add_to_last(u4, u5, v2);\n"
          "   gl_FragColor = v + v2;\n"
          "}\n"
          "vec4 add(in vec4 x, in vec4 y) {\n"
          "   return x + y;\n"
          "}\n"
          "void compound_add(inout vec4 x, in vec4 y) {\n"
          "   x = x + y;\n"
          "}\n"
          "void add_to_last(in vec4 x, in vec4 y, out vec4 z) {\n"
          "   z = x + y;\n"
          "}\n";
      compile(shaderString);
      // Test in parameters
      ASSERT_TRUE(foundInAllGLSLCode("v = _uadd(angle_frm(_uu1), angle_frm(_uu2))"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v(\\d)* = f_add_float4_float4\\(angle_frm\\(_u1\\), angle_frm\\(_u2\\)\\)"));
      // Test inout parameter
      ASSERT_TRUE(foundInAllGLSLCode("_ucompound_add(_uv, angle_frm(_uu3))"));
      ASSERT_TRUE(
          foundInHLSLCodeRegex("compound_add_float4_float4\\(_v(\\d)*, angle_frm\\(_u3\\)\\)"));
      // Test out parameter
      ASSERT_TRUE(foundInAllGLSLCode("add_to_last(angle_frm(_uu4), angle_frm(_uu5), _uv2)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "add_to_last_float4_float4_float4\\(angle_frm\\(_u4\\), angle_frm\\(_u5\\), _v2(\\d)*\\)"));
  }
  
  TEST_F(DebugShaderPrecisionTest, NestedFunctionCalls)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u1;\n"
          "uniform vec4 u2;\n"
          "uniform vec4 u3;\n"
          "vec4 add(in vec4 x, in vec4 y) {\n"
          "   return x + y;\n"
          "}\n"
          "vec4 compound_add(inout vec4 x, in vec4 y) {\n"
          "   x = x + y;\n"
          "   return x;\n"
          "}\n"
          "void main() {\n"
          "   vec4 v = u1;\n"
          "   vec4 v2 = add(compound_add(v, u2), fract(u3));\n"
          "   gl_FragColor = v + v2;\n"
          "}\n";
      compile(shaderString);
      // Test nested calls
      ASSERT_TRUE(foundInAllGLSLCode(
          "v2 = _uadd(_ucompound_add(_uv, angle_frm(_uu2)), angle_frm(fract(angle_frm(_uu3))))"));
      ASSERT_TRUE(foundInHLSLCodeRegex(
          "v2(\\d)* = f_add_float4_float4\\(f_compound_add_float4_float4\\(_v(\\d)*, "
          "angle_frm\\(_u2\\)\\), "
          "angle_frm\\(frac\\(angle_frm\\(_u3\\)\\)\\)\\)"));
  }
  
  // Test that code inside an index of a function out parameter gets processed.
  TEST_F(DebugShaderPrecisionTest, OpInIndexOfFunctionOutParameter)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "void foo(out vec4 f) { f.x = 0.0; }\n"
          "uniform float u2;\n"
          "void main() {\n"
          "   vec4 v[2];\n"
          "   foo(v[int(exp2(u2))]);\n"
          "   gl_FragColor = v[0];\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("angle_frm(exp2(angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInHLSLCode("angle_frm(exp2(angle_frm(_u2)))"));
  }
  
  // Test that code inside an index of an l-value gets processed.
  TEST_F(DebugShaderPrecisionTest, OpInIndexOfLValue)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform vec4 u1;\n"
          "uniform float u2;\n"
          "void main() {\n"
          "   vec4 v[2];\n"
          "   v[int(exp2(u2))] = u1;\n"
          "   gl_FragColor = v[0];\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("angle_frm(exp2(angle_frm(_uu2)))"));
      ASSERT_TRUE(foundInHLSLCode("angle_frm(exp2(angle_frm(_u2)))"));
  }
  
  // Test that the out parameter of modf doesn't get rounded
  TEST_F(DebugShaderPrecisionTest, ModfOutParameter)
  {
      const std::string &shaderString =
          "#version 300 es\n"
          "precision mediump float;\n"
          "uniform float u;\n"
          "out vec4 my_FragColor;\n"
          "void main() {\n"
          "   float o;\n"
          "   float f = modf(u, o);\n"
          "   my_FragColor = vec4(f, o, 0, 1);\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("modf(angle_frm(_uu), _uo)"));
      ASSERT_TRUE(foundInHLSLCodeRegex(R"(modf\(angle_frm\(_u\), _o(\d)*)"));
  }
  
  #if defined(ANGLE_ENABLE_HLSL)
  // Tests precision emulation with HLSL 3.0 output -- should error gracefully.
  TEST(DebugShaderPrecisionNegativeTest, HLSL3Unsupported)
  {
      const std::string &shaderString =
          "precision mediump float;\n"
          "uniform float u;\n"
          "void main() {\n"
          "   gl_FragColor = vec4(u);\n"
          "}\n";
      std::string infoLog;
      std::string translatedCode;
      ShBuiltInResources resources;
      sh::InitBuiltInResources(&resources);
      resources.WEBGL_debug_shader_precision = 1;
      ASSERT_FALSE(compileTestShader(GL_FRAGMENT_SHADER, SH_GLES3_SPEC, SH_HLSL_3_0_OUTPUT,
                                     shaderString, &resources, 0, &translatedCode, &infoLog));
  }
  #endif  // defined(ANGLE_ENABLE_HLSL)
  
  // Test that compound assignment inside an expression compiles correctly. This is a test for a bug
  // where incorrect type information on the compound assignment call node caused an assert to trigger
  // in the debug build.
  TEST_F(DebugShaderPrecisionTest, CompoundAssignmentInsideExpression)
  {
      const std::string &shaderString =
          "#version 300 es\n"
          "precision mediump float;\n"
          "out vec4 my_FragColor;\n"
          "void main() {\n"
          "   float f = 0.0;\n"
          "   my_FragColor = vec4(abs(f += 1.0), 0, 0, 1);\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInAllGLSLCode("abs(angle_compound_add_frm(_uf, 1.0))"));
  }
  
  // Test that having rounded values inside the right hand side of logical or doesn't trigger asserts
  // in HLSL output.
  TEST_F(DebugShaderPrecisionTest, RoundedValueOnRightSideOfLogicalOr)
  {
      const std::string &shaderString =
          "#version 300 es\n"
          "precision mediump float;\n"
          "out vec4 my_FragColor;\n"
          "uniform float u1, u2;\n"
          "void main() {\n"
          "   my_FragColor = vec4(u1 == 0.0 || u2 == 0.0);\n"
          "}\n";
      compile(shaderString);
      ASSERT_TRUE(foundInHLSLCode("angle_frm(_u2) == 0.0"));
  }