| #!amber |
| |
| # Copyright 2019 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 folding path. |
| |
| # The test passes because 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; |
| # |
| # void main(void) |
| # { |
| # int i = 2; |
| # |
| # do |
| # { |
| # i++; |
| # } |
| # while(gl_FragCoord.x >= 0.0 && false); |
| # |
| # // If condition is always true. |
| # if (i == 3) |
| # _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: 42 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %20 %37 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %8 "i" |
| OpName %20 "gl_FragCoord" |
| OpName %37 "_GLF_color" |
| OpDecorate %8 RelaxedPrecision |
| OpDecorate %14 RelaxedPrecision |
| OpDecorate %16 RelaxedPrecision |
| OpDecorate %20 BuiltIn FragCoord |
| OpDecorate %31 RelaxedPrecision |
| OpDecorate %37 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %7 = OpTypePointer Function %6 |
| %9 = OpConstant %6 2 |
| %15 = OpConstant %6 1 |
| %17 = OpTypeFloat 32 |
| %18 = OpTypeVector %17 4 |
| %19 = OpTypePointer Input %18 |
| %20 = OpVariable %19 Input |
| %21 = OpTypeInt 32 0 |
| %22 = OpConstant %21 0 |
| %23 = OpTypePointer Input %17 |
| %26 = OpConstant %17 0 |
| %27 = OpTypeBool |
| %29 = OpConstantFalse %27 |
| %32 = OpConstant %6 3 |
| %36 = OpTypePointer Output %18 |
| %37 = OpVariable %36 Output |
| %38 = OpConstant %17 1 |
| %39 = OpConstantComposite %18 %38 %26 %26 %38 |
| %41 = OpConstantComposite %18 %26 %26 %26 %26 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %8 = OpVariable %7 Function |
| OpStore %8 %9 |
| OpBranch %10 |
| %10 = OpLabel |
| OpLoopMerge %12 %13 None |
| OpBranch %11 |
| %11 = OpLabel |
| %14 = OpLoad %6 %8 |
| %16 = OpIAdd %6 %14 %15 |
| OpStore %8 %16 |
| OpBranch %13 |
| %13 = OpLabel |
| %24 = OpAccessChain %23 %20 %22 |
| %25 = OpLoad %17 %24 |
| %28 = OpFOrdGreaterThanEqual %27 %25 %26 |
| %30 = OpLogicalAnd %27 %28 %29 |
| OpBranchConditional %30 %10 %12 |
| %12 = OpLabel |
| %31 = OpLoad %6 %8 |
| %33 = OpIEqual %27 %31 %32 |
| OpSelectionMerge %35 None |
| OpBranchConditional %33 %34 %40 |
| %34 = OpLabel |
| OpStore %37 %39 |
| OpBranch %35 |
| %40 = OpLabel |
| OpStore %37 %41 |
| OpBranch %35 |
| %35 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| # resolution |
| BUFFER variant_resolution DATA_TYPE vec2<float> DATA |
| 256.0 256.0 |
| 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_resolution 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 |