3 # Copyright 2020 Google LLC
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
18 # A test for a coverage-gap found by GraphicsFuzz.
20 # Short description: A fragment shader that covers a specific instruction folding path.
22 # The test passes because shader always writes red.
24 SHADER vertex variant_vertex_shader PASSTHROUGH
26 # variant_fragment_shader is derived from the following GLSL:
28 # precision highp float;
30 # layout(set = 0, binding = 0) uniform buf0
34 # layout(location = 0) out vec4 _GLF_color;
38 # // If condition is always true.
39 # if(-(four / 2) == -2)
40 # _GLF_color = vec4(1, 0, 0, 1);
42 # _GLF_color = vec4(0);
44 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
47 ; Generator: Khronos Glslang Reference Front End; 8
51 %1 = OpExtInstImport "GLSL.std.450"
52 OpMemoryModel Logical GLSL450
53 OpEntryPoint Fragment %4 "main" %25
54 OpExecutionMode %4 OriginUpperLeft
58 OpMemberName %7 0 "four"
60 OpName %25 "_GLF_color"
61 OpMemberDecorate %7 0 RelaxedPrecision
62 OpMemberDecorate %7 0 Offset 0
64 OpDecorate %9 DescriptorSet 0
65 OpDecorate %9 Binding 0
66 OpDecorate %13 RelaxedPrecision
67 OpDecorate %15 RelaxedPrecision
68 OpDecorate %16 RelaxedPrecision
69 OpDecorate %25 Location 0
71 %3 = OpTypeFunction %2
74 %8 = OpTypePointer Uniform %7
75 %9 = OpVariable %8 Uniform
77 %11 = OpTypePointer Uniform %6
79 %17 = OpConstant %6 -2
82 %23 = OpTypeVector %22 4
83 %24 = OpTypePointer Output %23
84 %25 = OpVariable %24 Output
85 %26 = OpConstant %22 1
86 %27 = OpConstant %22 0
87 %28 = OpConstantComposite %23 %26 %27 %27 %26
88 %30 = OpConstantComposite %23 %27 %27 %27 %27
89 %4 = OpFunction %2 None %3
91 %12 = OpAccessChain %11 %9 %10
93 %15 = OpSDiv %6 %13 %14
94 %16 = OpSNegate %6 %15
95 %19 = OpIEqual %18 %16 %17
96 OpSelectionMerge %21 None
97 OpBranchConditional %19 %20 %29
109 # uniforms for variant
112 BUFFER variant_four DATA_TYPE int32 DATA
116 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
118 PIPELINE graphics variant_pipeline
119 ATTACH variant_vertex_shader
120 ATTACH variant_fragment_shader
121 FRAMEBUFFER_SIZE 256 256
122 BIND BUFFER variant_framebuffer AS color LOCATION 0
123 BIND BUFFER variant_four AS uniform DESCRIPTOR_SET 0 BINDING 0
125 CLEAR_COLOR variant_pipeline 0 0 0 255
127 CLEAR variant_pipeline
128 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
130 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255