1#!amber
2
3# Copyright 2020 Google LLC
4#
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
8#
9#     http://www.apache.org/licenses/LICENSE-2.0
10#
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.
16
17
18# A test for a coverage-gap found by GraphicsFuzz.
19
20# Short description: A fragment shader that covers a specific load size reduction path.
21
22# The test passes because shader always writes red.
23
24# Optimized using spirv-opt with the following arguments:
25# '-Os'
26# spirv-opt commit hash: 9215c1b7df0029f27807e8c8d7ec80532ce90a87
27
28
29
30SHADER vertex variant_vertex_shader PASSTHROUGH
31
32# variant_fragment_shader is derived from the following GLSL:
33# #version 310 es
34# precision highp float;
35#
36# layout(location = 0) out vec4 _GLF_color;
37# layout(set = 0, binding = 0) uniform buf0
38# {
39#     int zero;
40# };
41#
42# struct S
43# {
44#     int x[1];
45# };
46#
47# // Function returns 1 or 2.
48# int func(S s, int a)
49# {
50#     _GLF_color = vec4(0);
51#
52#     if(s.x[zero] == a)
53#         return 1;
54#
55#     return 2;
56# }
57#
58# void main()
59# {
60#     S s; // Uninitialized. Contents don't matter.
61#     int res = func(s, s.x[0]);
62#     // Always true.
63#     if (res == 1 || res == 2)
64#         _GLF_color = vec4(1, 0, 0, 1);
65#     else
66#         _GLF_color = vec4(0);
67# }
68SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
69; SPIR-V
70; Version: 1.0
71; Generator: Khronos Glslang Reference Front End; 8
72; Bound: 97
73; Schema: 0
74               OpCapability Shader
75          %1 = OpExtInstImport "GLSL.std.450"
76               OpMemoryModel Logical GLSL450
77               OpEntryPoint Fragment %4 "main" %21
78               OpExecutionMode %4 OriginUpperLeft
79               OpSource ESSL 310
80               OpName %4 "main"
81               OpName %21 "_GLF_color"
82               OpName %25 "buf0"
83               OpMemberName %25 0 "zero"
84               OpName %27 ""
85               OpDecorate %21 Location 0
86               OpMemberDecorate %25 0 RelaxedPrecision
87               OpMemberDecorate %25 0 Offset 0
88               OpDecorate %25 Block
89               OpDecorate %27 DescriptorSet 0
90               OpDecorate %27 Binding 0
91               OpDecorate %49 RelaxedPrecision
92               OpDecorate %79 RelaxedPrecision
93               OpDecorate %81 RelaxedPrecision
94               OpDecorate %88 RelaxedPrecision
95               OpDecorate %96 RelaxedPrecision
96          %2 = OpTypeVoid
97          %3 = OpTypeFunction %2
98          %6 = OpTypeInt 32 1
99          %7 = OpTypeInt 32 0
100          %8 = OpConstant %7 1
101          %9 = OpTypeArray %6 %8
102         %12 = OpTypePointer Function %6
103         %18 = OpTypeFloat 32
104         %19 = OpTypeVector %18 4
105         %20 = OpTypePointer Output %19
106         %21 = OpVariable %20 Output
107         %22 = OpConstant %18 0
108         %23 = OpConstantComposite %19 %22 %22 %22 %22
109         %24 = OpConstant %6 0
110         %25 = OpTypeStruct %6
111         %26 = OpTypePointer Uniform %25
112         %27 = OpVariable %26 Uniform
113         %28 = OpTypePointer Uniform %6
114         %34 = OpTypeBool
115         %38 = OpConstant %6 1
116         %40 = OpConstant %6 2
117         %58 = OpConstant %18 1
118         %59 = OpConstantComposite %19 %58 %22 %22 %58
119         %87 = OpTypePointer Function %9
120          %4 = OpFunction %2 None %3
121          %5 = OpLabel
122         %88 = OpVariable %87 Function
123         %89 = OpLoad %9 %88
124         %49 = OpCompositeExtract %6 %89 0
125               OpBranch %74
126         %74 = OpLabel
127               OpLoopMerge %75 %76 None
128               OpBranch %77
129         %77 = OpLabel
130               OpStore %21 %23
131         %78 = OpAccessChain %28 %27 %24
132         %79 = OpLoad %6 %78
133         %94 = OpAccessChain %12 %88 %79
134         %81 = OpLoad %6 %94
135         %83 = OpIEqual %34 %81 %49
136               OpSelectionMerge %84 None
137               OpBranchConditional %83 %85 %84
138         %85 = OpLabel
139               OpBranch %75
140         %84 = OpLabel
141               OpBranch %75
142         %76 = OpLabel
143               OpBranch %74
144         %75 = OpLabel
145         %96 = OpPhi %6 %38 %85 %40 %84
146         %52 = OpIEqual %34 %96 %38
147         %54 = OpIEqual %34 %96 %40
148         %55 = OpLogicalOr %34 %52 %54
149               OpSelectionMerge %57 None
150               OpBranchConditional %55 %56 %60
151         %60 = OpLabel
152               OpStore %21 %23
153               OpBranch %57
154         %56 = OpLabel
155               OpStore %21 %59
156               OpBranch %57
157         %57 = OpLabel
158               OpReturn
159               OpFunctionEnd
160END
161
162# uniforms for variant
163
164# zero
165BUFFER variant_zero DATA_TYPE int32 DATA
166 0
167END
168
169BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
170
171PIPELINE graphics variant_pipeline
172  ATTACH variant_vertex_shader
173  ATTACH variant_fragment_shader
174  FRAMEBUFFER_SIZE 256 256
175  BIND BUFFER variant_framebuffer AS color LOCATION 0
176  BIND BUFFER variant_zero AS uniform DESCRIPTOR_SET 0 BINDING 0
177END
178CLEAR_COLOR variant_pipeline 0 0 0 255
179
180CLEAR variant_pipeline
181RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
182
183EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
184