| #!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 the GraphicsFuzz project. |
| |
| # Short description: Covers specific DAG combiner and legalize vector ops code paths |
| |
| # 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 |
| # #define _int_1 _GLF_uniform_int_values[0] |
| # #define _int_0 _GLF_uniform_int_values[1] |
| # |
| # precision highp int; |
| # |
| # precision highp float; |
| # |
| # // Contents of _GLF_uniform_int_values: [1, 0] |
| # layout(set = 0, binding = 0) uniform buf0 |
| # { |
| # int _GLF_uniform_int_values[2]; |
| # }; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # void main() |
| # { |
| # // a becomes -2147483648. |
| # int a = bitfieldReverse(1); |
| # |
| # // a is negative therefore this results in an undefined value, but not in undefined behavior. |
| # int b = 1 << a; |
| # |
| # int c = findMSB(b); |
| # |
| # _GLF_color = vec4(c); |
| # |
| # if (a == -2147483648) |
| # { |
| # _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1); |
| # } |
| # else |
| # { |
| # _GLF_color = vec4(_int_0); |
| # } |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 10 |
| ; Bound: 56 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %20 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %8 "a" |
| OpName %11 "b" |
| OpName %14 "c" |
| OpName %20 "_GLF_color" |
| OpName %33 "buf0" |
| OpMemberName %33 0 "_GLF_uniform_int_values" |
| OpName %35 "" |
| OpDecorate %20 Location 0 |
| OpDecorate %32 ArrayStride 16 |
| OpMemberDecorate %33 0 Offset 0 |
| OpDecorate %33 Block |
| OpDecorate %35 DescriptorSet 0 |
| OpDecorate %35 Binding 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeInt 32 1 |
| %7 = OpTypePointer Function %6 |
| %9 = OpConstant %6 1 |
| %17 = OpTypeFloat 32 |
| %18 = OpTypeVector %17 4 |
| %19 = OpTypePointer Output %18 |
| %20 = OpVariable %19 Output |
| %25 = OpConstant %6 -2147483648 |
| %26 = OpTypeBool |
| %30 = OpTypeInt 32 0 |
| %31 = OpConstant %30 2 |
| %32 = OpTypeArray %6 %31 |
| %33 = OpTypeStruct %32 |
| %34 = OpTypePointer Uniform %33 |
| %35 = OpVariable %34 Uniform |
| %36 = OpConstant %6 0 |
| %37 = OpTypePointer Uniform %6 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %8 = OpVariable %7 Function |
| %11 = OpVariable %7 Function |
| %14 = OpVariable %7 Function |
| %10 = OpBitReverse %6 %9 |
| OpStore %8 %10 |
| %12 = OpLoad %6 %8 |
| %13 = OpShiftLeftLogical %6 %9 %12 |
| OpStore %11 %13 |
| %15 = OpLoad %6 %11 |
| %16 = OpExtInst %6 %1 FindSMsb %15 |
| OpStore %14 %16 |
| %21 = OpLoad %6 %14 |
| %22 = OpConvertSToF %17 %21 |
| %23 = OpCompositeConstruct %18 %22 %22 %22 %22 |
| OpStore %20 %23 |
| %24 = OpLoad %6 %8 |
| %27 = OpIEqual %26 %24 %25 |
| OpSelectionMerge %29 None |
| OpBranchConditional %27 %28 %51 |
| %28 = OpLabel |
| %38 = OpAccessChain %37 %35 %36 %36 |
| %39 = OpLoad %6 %38 |
| %40 = OpConvertSToF %17 %39 |
| %41 = OpAccessChain %37 %35 %36 %9 |
| %42 = OpLoad %6 %41 |
| %43 = OpConvertSToF %17 %42 |
| %44 = OpAccessChain %37 %35 %36 %9 |
| %45 = OpLoad %6 %44 |
| %46 = OpConvertSToF %17 %45 |
| %47 = OpAccessChain %37 %35 %36 %36 |
| %48 = OpLoad %6 %47 |
| %49 = OpConvertSToF %17 %48 |
| %50 = OpCompositeConstruct %18 %40 %43 %46 %49 |
| OpStore %20 %50 |
| OpBranch %29 |
| %51 = OpLabel |
| %52 = OpAccessChain %37 %35 %36 %9 |
| %53 = OpLoad %6 %52 |
| %54 = OpConvertSToF %17 %53 |
| %55 = OpCompositeConstruct %18 %54 %54 %54 %54 |
| OpStore %20 %55 |
| OpBranch %29 |
| %29 = OpLabel |
| OpReturn |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| # _GLF_uniform_int_values |
| BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA |
| 1 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__GLF_uniform_int_values 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 |