| #!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 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() |
| # { |
| # bool b = false; |
| # |
| # // A single loop with i = 1. |
| # for(int i = 1; i > 0; i--) |
| # { |
| # float a = 3.0 - float(i); |
| # |
| # // If condition is always true. |
| # if(2.0 - a == 0.0) |
| # b = true; |
| # } |
| # |
| # // If condition is always true. |
| # if (b) |
| # _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: 49 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %44 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %8 "b" |
| OpName %12 "i" |
| OpName %24 "a" |
| OpName %44 "_GLF_color" |
| OpDecorate %12 RelaxedPrecision |
| OpDecorate %19 RelaxedPrecision |
| OpDecorate %26 RelaxedPrecision |
| OpDecorate %37 RelaxedPrecision |
| OpDecorate %38 RelaxedPrecision |
| OpDecorate %44 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeBool |
| %7 = OpTypePointer Function %6 |
| %9 = OpConstantFalse %6 |
| %10 = OpTypeInt 32 1 |
| %11 = OpTypePointer Function %10 |
| %13 = OpConstant %10 1 |
| %20 = OpConstant %10 0 |
| %22 = OpTypeFloat 32 |
| %23 = OpTypePointer Function %22 |
| %25 = OpConstant %22 3 |
| %29 = OpConstant %22 2 |
| %32 = OpConstant %22 0 |
| %36 = OpConstantTrue %6 |
| %42 = OpTypeVector %22 4 |
| %43 = OpTypePointer Output %42 |
| %44 = OpVariable %43 Output |
| %45 = OpConstant %22 1 |
| %46 = OpConstantComposite %42 %45 %32 %32 %45 |
| %48 = OpConstantComposite %42 %32 %32 %32 %32 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %8 = OpVariable %7 Function |
| %12 = OpVariable %11 Function |
| %24 = OpVariable %23 Function |
| OpStore %8 %9 |
| OpStore %12 %13 |
| OpBranch %14 |
| %14 = OpLabel |
| OpLoopMerge %16 %17 None |
| OpBranch %18 |
| %18 = OpLabel |
| %19 = OpLoad %10 %12 |
| %21 = OpSGreaterThan %6 %19 %20 |
| OpBranchConditional %21 %15 %16 |
| %15 = OpLabel |
| %26 = OpLoad %10 %12 |
| %27 = OpConvertSToF %22 %26 |
| %28 = OpFSub %22 %25 %27 |
| OpStore %24 %28 |
| %30 = OpLoad %22 %24 |
| %31 = OpFSub %22 %29 %30 |
| %33 = OpFOrdEqual %6 %31 %32 |
| OpSelectionMerge %35 None |
| OpBranchConditional %33 %34 %35 |
| %34 = OpLabel |
| OpStore %8 %36 |
| OpBranch %35 |
| %35 = OpLabel |
| OpBranch %17 |
| %17 = OpLabel |
| %37 = OpLoad %10 %12 |
| %38 = OpISub %10 %37 %13 |
| OpStore %12 %38 |
| OpBranch %14 |
| %16 = OpLabel |
| %39 = OpLoad %6 %8 |
| OpSelectionMerge %41 None |
| OpBranchConditional %39 %40 %47 |
| %40 = OpLabel |
| OpStore %44 %46 |
| OpBranch %41 |
| %47 = OpLabel |
| OpStore %44 %48 |
| OpBranch %41 |
| %41 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| 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 |
| 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 |