| #!amber |
| |
| # Copyright 2020 Google LLC |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| |
| # A test for a coverage-gap found by GraphicsFuzz. |
| |
| # Short description: A fragment shader that covers a specific instruction simplification code path |
| |
| # The test passes because the shader always writes red. |
| |
| SHADER vertex variant_vertex_shader PASSTHROUGH |
| |
| # variant_fragment_shader is derived from the following GLSL: |
| # #version 310 es |
| # precision highp float; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # layout(set = 0, binding = 0) uniform buf0 |
| # { |
| # float zero; |
| # }; |
| # |
| # void main() |
| # { |
| # float f = gl_FragCoord.x; |
| # |
| # // (1.0 / 0.0) -> Inf. |
| # // (Inf * 0.0) -> Nan. |
| # // So: f += Nan. |
| # f += (1.0 / 0.0) * 0.0; |
| # |
| # // Doesn't matter if this is executed or not. |
| # if (5.0 / f == 0.0) |
| # f += 1.0; |
| # |
| # if (isnan(f) || f != zero) |
| # f = 0.0; |
| # |
| # // Always true. |
| # if (f == 0.0) |
| # _GLF_color = vec4(1, 0, 0, 1); |
| # else |
| # _GLF_color = vec4(0); |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 8 |
| ; Bound: 58 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %11 %54 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %8 "f" |
| OpName %11 "gl_FragCoord" |
| OpName %37 "buf0" |
| OpMemberName %37 0 "zero" |
| OpName %39 "" |
| OpName %54 "_GLF_color" |
| OpDecorate %11 BuiltIn FragCoord |
| OpMemberDecorate %37 0 Offset 0 |
| OpDecorate %37 Block |
| OpDecorate %39 DescriptorSet 0 |
| OpDecorate %39 Binding 0 |
| OpDecorate %54 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypePointer Function %6 |
| %9 = OpTypeVector %6 4 |
| %10 = OpTypePointer Input %9 |
| %11 = OpVariable %10 Input |
| %12 = OpTypeInt 32 0 |
| %13 = OpConstant %12 0 |
| %14 = OpTypePointer Input %6 |
| %17 = OpConstant %6 -0x1.8p+128 |
| %20 = OpConstant %6 5 |
| %23 = OpConstant %6 0 |
| %24 = OpTypeBool |
| %28 = OpConstant %6 1 |
| %37 = OpTypeStruct %6 |
| %38 = OpTypePointer Uniform %37 |
| %39 = OpVariable %38 Uniform |
| %40 = OpTypeInt 32 1 |
| %41 = OpConstant %40 0 |
| %42 = OpTypePointer Uniform %6 |
| %53 = OpTypePointer Output %9 |
| %54 = OpVariable %53 Output |
| %55 = OpConstantComposite %9 %28 %23 %23 %28 |
| %57 = OpConstantComposite %9 %23 %23 %23 %23 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %8 = OpVariable %7 Function |
| %15 = OpAccessChain %14 %11 %13 |
| %16 = OpLoad %6 %15 |
| OpStore %8 %16 |
| %18 = OpLoad %6 %8 |
| %19 = OpFAdd %6 %18 %17 |
| OpStore %8 %19 |
| %21 = OpLoad %6 %8 |
| %22 = OpFDiv %6 %20 %21 |
| %25 = OpFOrdEqual %24 %22 %23 |
| OpSelectionMerge %27 None |
| OpBranchConditional %25 %26 %27 |
| %26 = OpLabel |
| %29 = OpLoad %6 %8 |
| %30 = OpFAdd %6 %29 %28 |
| OpStore %8 %30 |
| OpBranch %27 |
| %27 = OpLabel |
| %31 = OpLoad %6 %8 |
| %32 = OpIsNan %24 %31 |
| %33 = OpLogicalNot %24 %32 |
| OpSelectionMerge %35 None |
| OpBranchConditional %33 %34 %35 |
| %34 = OpLabel |
| %36 = OpLoad %6 %8 |
| %43 = OpAccessChain %42 %39 %41 |
| %44 = OpLoad %6 %43 |
| %45 = OpFOrdNotEqual %24 %36 %44 |
| OpBranch %35 |
| %35 = OpLabel |
| %46 = OpPhi %24 %32 %27 %45 %34 |
| OpSelectionMerge %48 None |
| OpBranchConditional %46 %47 %48 |
| %47 = OpLabel |
| OpStore %8 %23 |
| OpBranch %48 |
| %48 = OpLabel |
| %49 = OpLoad %6 %8 |
| %50 = OpFOrdEqual %24 %49 %23 |
| OpSelectionMerge %52 None |
| OpBranchConditional %50 %51 %56 |
| %51 = OpLabel |
| OpStore %54 %55 |
| OpBranch %52 |
| %56 = OpLabel |
| OpStore %54 %57 |
| OpBranch %52 |
| %52 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| # zero |
| BUFFER variant_zero DATA_TYPE float DATA |
| 0.0 |
| END |
| |
| BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM |
| |
| PIPELINE graphics variant_pipeline |
| ATTACH variant_vertex_shader |
| ATTACH variant_fragment_shader |
| FRAMEBUFFER_SIZE 256 256 |
| BIND BUFFER variant_framebuffer AS color LOCATION 0 |
| BIND BUFFER variant_zero AS uniform DESCRIPTOR_SET 0 BINDING 0 |
| END |
| CLEAR_COLOR variant_pipeline 0 0 0 255 |
| |
| CLEAR variant_pipeline |
| RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 |
| |
| EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 |