3 # Copyright 2019 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 # precision highp int;
32 # layout(location = 0) out vec4 _GLF_color;
38 # // If condition is always false.
40 # _GLF_color = vec4(0);
42 # _GLF_color = vec4(1, 0, 0, 1);
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" %18
54 OpExecutionMode %4 OriginUpperLeft
58 OpName %18 "_GLF_color"
59 OpDecorate %18 Location 0
61 %3 = OpTypeFunction %2
63 %7 = OpTypePointer Function %6
64 %9 = OpConstantFalse %6
65 %10 = OpConstantTrue %6
67 %16 = OpTypeVector %15 4
68 %17 = OpTypePointer Output %16
69 %18 = OpVariable %17 Output
70 %19 = OpConstant %15 0
71 %20 = OpConstantComposite %16 %19 %19 %19 %19
72 %22 = OpConstant %15 1
73 %23 = OpConstantComposite %16 %22 %19 %19 %22
74 %4 = OpFunction %2 None %3
76 %8 = OpVariable %7 Function
79 %12 = OpLogicalAnd %6 %10 %11
80 OpSelectionMerge %14 None
81 OpBranchConditional %12 %13 %21
94 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
96 PIPELINE graphics variant_pipeline
97 ATTACH variant_vertex_shader
98 ATTACH variant_fragment_shader
99 FRAMEBUFFER_SIZE 256 256
100 BIND BUFFER variant_framebuffer AS color LOCATION 0
102 CLEAR_COLOR variant_pipeline 0 0 0 255
104 CLEAR variant_pipeline
105 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
107 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255