| # Copyright 2018 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 bug found by GraphicsFuzz. |
| # A fragment shader that uses a while loop inside a switch. |
| # Derived from the following GLSL fragment shader. |
| # We check that the top-left pixel is red. The test passes because the |
| # first if statement checks if the x coordinate is less than 10 and if so writes |
| # red to _GLF_color and then returns. |
| |
| # #version 310 es |
| # |
| # precision highp float; |
| # precision highp int; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # layout(set = 0, binding = 0) uniform buf0 { |
| # vec2 injectionSwitch; |
| # }; |
| # |
| # void main() |
| # { |
| # if (gl_FragCoord.x < 10.0) { |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); |
| # return; |
| # } |
| # switch(int(injectionSwitch.x)) |
| # { |
| # case 0: |
| # while(bool(1.0)) |
| # { |
| # discard; |
| # } |
| # } |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); |
| # return; |
| # } |
| |
| [vertex shader passthrough] |
| |
| [fragment shader spirv] |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 7 |
| ; Bound: 51 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %main "main" %gl_FragCoord %_GLF_color |
| OpExecutionMode %main OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %main "main" |
| OpName %gl_FragCoord "gl_FragCoord" |
| OpName %_GLF_color "_GLF_color" |
| OpName %buf0 "buf0" |
| OpMemberName %buf0 0 "injectionSwitch" |
| OpName %_ "" |
| OpDecorate %gl_FragCoord BuiltIn FragCoord |
| OpDecorate %_GLF_color Location 0 |
| OpMemberDecorate %buf0 0 Offset 0 |
| OpDecorate %buf0 Block |
| OpDecorate %_ DescriptorSet 0 |
| OpDecorate %_ Binding 0 |
| %void = OpTypeVoid |
| %3 = OpTypeFunction %void |
| %float = OpTypeFloat 32 |
| %v4float = OpTypeVector %float 4 |
| %_ptr_Input_v4float = OpTypePointer Input %v4float |
| %gl_FragCoord = OpVariable %_ptr_Input_v4float Input |
| %uint = OpTypeInt 32 0 |
| %uint_0 = OpConstant %uint 0 |
| %_ptr_Input_float = OpTypePointer Input %float |
| %float_10 = OpConstant %float 10 |
| %bool = OpTypeBool |
| %_ptr_Output_v4float = OpTypePointer Output %v4float |
| %_GLF_color = OpVariable %_ptr_Output_v4float Output |
| %float_1 = OpConstant %float 1 |
| %float_0 = OpConstant %float 0 |
| %24 = OpConstantComposite %v4float %float_1 %float_0 %float_0 %float_1 |
| %v2float = OpTypeVector %float 2 |
| %buf0 = OpTypeStruct %v2float |
| %_ptr_Uniform_buf0 = OpTypePointer Uniform %buf0 |
| %_ = OpVariable %_ptr_Uniform_buf0 Uniform |
| %int = OpTypeInt 32 1 |
| %int_0 = OpConstant %int 0 |
| %_ptr_Uniform_float = OpTypePointer Uniform %float |
| %main = OpFunction %void None %3 |
| %5 = OpLabel |
| OpBranch %48 |
| %48 = OpLabel |
| OpLoopMerge %47 %50 None |
| OpBranch %49 |
| %49 = OpLabel |
| %13 = OpAccessChain %_ptr_Input_float %gl_FragCoord %uint_0 |
| %14 = OpLoad %float %13 |
| %17 = OpFOrdLessThan %bool %14 %float_10 |
| OpSelectionMerge %19 None |
| OpBranchConditional %17 %18 %19 |
| %18 = OpLabel |
| OpStore %_GLF_color %24 |
| OpBranch %47 |
| %19 = OpLabel |
| %33 = OpAccessChain %_ptr_Uniform_float %_ %int_0 %uint_0 |
| %34 = OpLoad %float %33 |
| %35 = OpConvertFToS %int %34 |
| OpSelectionMerge %37 None |
| OpSwitch %35 %37 0 %36 |
| %36 = OpLabel |
| OpBranch %38 |
| %38 = OpLabel |
| OpLoopMerge %40 %41 None |
| OpBranch %39 |
| %39 = OpLabel |
| OpKill |
| %41 = OpLabel |
| OpBranch %38 |
| %40 = OpLabel |
| OpUnreachable |
| %37 = OpLabel |
| OpStore %_GLF_color %24 |
| OpBranch %47 |
| %50 = OpLabel |
| OpBranch %48 |
| %47 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| |
| |
| [test] |
| uniform ubo 0:0 vec2 0 0.0 1.0 |
| draw rect -1 -1 2 2 |
| probe rgba (0, 0) (1, 0, 0, 1) |