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 # layout(location = 0) out vec4 _GLF_color;
34 # // If condition is always true.
35 # if((gl_FragCoord.x < 0.0) || true)
36 # _GLF_color = vec4(1, 0, 0, 1);
38 # _GLF_color = vec4(0);
40 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
43 ; Generator: Khronos Glslang Reference Front End; 8
47 %1 = OpExtInstImport "GLSL.std.450"
48 OpMemoryModel Logical GLSL450
49 OpEntryPoint Fragment %4 "main" %9 %23
50 OpExecutionMode %4 OriginUpperLeft
53 OpName %9 "gl_FragCoord"
54 OpName %23 "_GLF_color"
55 OpDecorate %9 BuiltIn FragCoord
56 OpDecorate %23 Location 0
58 %3 = OpTypeFunction %2
60 %7 = OpTypeVector %6 4
61 %8 = OpTypePointer Input %7
62 %9 = OpVariable %8 Input
64 %11 = OpConstant %10 0
65 %12 = OpTypePointer Input %6
68 %18 = OpConstantTrue %16
69 %22 = OpTypePointer Output %7
70 %23 = OpVariable %22 Output
72 %25 = OpConstantComposite %7 %24 %15 %15 %24
73 %27 = OpConstantComposite %7 %15 %15 %15 %15
74 %4 = OpFunction %2 None %3
76 %13 = OpAccessChain %12 %9 %11
78 %17 = OpFOrdLessThan %16 %14 %15
79 %19 = OpLogicalOr %16 %17 %18
80 OpSelectionMerge %21 None
81 OpBranchConditional %19 %20 %26
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