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 the GraphicsFuzz project.
19
20# Short description: A fragment shader that covers a specific inst combine compares code path
21
22# The test passes because the shader always writes red.
23
24# Optimized using spirv-opt with the following arguments:
25# '-O'
26# spirv-opt commit hash: a187dd58a0485988841d325a85c8e6063f53500a
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# #define _int_1 _GLF_uniform_int_values[0]
35# #define _int_0 _GLF_uniform_int_values[1]
36# #define _int_10 _GLF_uniform_int_values[2]
37#
38# precision highp float;
39#
40# precision highp int;
41#
42# // Contents of _GLF_uniform_int_values: [1, 0, 10]
43# layout(set = 0, binding = 0) uniform buf0
44# {
45#     int _GLF_uniform_int_values[3];
46# };
47#
48# layout(location = 0) out vec4 _GLF_color;
49#
50# void main()
51# {
52#     _GLF_color = vec4(_int_0);
53#
54#     // c becomes 1.
55#     int c = (_int_1 << _int_1) >> 1;
56#
57#     int a = _int_0;
58#     for (int i = c; c < 10; i++)
59#     {
60#         a++;
61#         if (a == _int_10)
62#         {
63#             _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
64#             break;
65#         }
66#     }
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; 10
72; Bound: 72
73; Schema: 0
74               OpCapability Shader
75          %1 = OpExtInstImport "GLSL.std.450"
76               OpMemoryModel Logical GLSL450
77               OpEntryPoint Fragment %4 "main" %9
78               OpExecutionMode %4 OriginUpperLeft
79               OpSource ESSL 310
80               OpName %4 "main"
81               OpName %9 "_GLF_color"
82               OpName %14 "buf0"
83               OpMemberName %14 0 "_GLF_uniform_int_values"
84               OpName %16 ""
85               OpDecorate %9 Location 0
86               OpDecorate %13 ArrayStride 16
87               OpMemberDecorate %14 0 Offset 0
88               OpDecorate %14 Block
89               OpDecorate %16 DescriptorSet 0
90               OpDecorate %16 Binding 0
91          %2 = OpTypeVoid
92          %3 = OpTypeFunction %2
93          %6 = OpTypeFloat 32
94          %7 = OpTypeVector %6 4
95          %8 = OpTypePointer Output %7
96          %9 = OpVariable %8 Output
97         %10 = OpTypeInt 32 1
98         %11 = OpTypeInt 32 0
99         %12 = OpConstant %11 3
100         %13 = OpTypeArray %10 %12
101         %14 = OpTypeStruct %13
102         %15 = OpTypePointer Uniform %14
103         %16 = OpVariable %15 Uniform
104         %17 = OpConstant %10 0
105         %18 = OpConstant %10 1
106         %19 = OpTypePointer Uniform %10
107         %43 = OpConstant %10 10
108         %44 = OpTypeBool
109         %49 = OpConstant %10 2
110          %4 = OpFunction %2 None %3
111          %5 = OpLabel
112         %20 = OpAccessChain %19 %16 %17 %18
113         %21 = OpLoad %10 %20
114         %22 = OpConvertSToF %6 %21
115         %23 = OpCompositeConstruct %7 %22 %22 %22 %22
116               OpStore %9 %23
117         %26 = OpAccessChain %19 %16 %17 %17
118         %27 = OpLoad %10 %26
119         %30 = OpShiftLeftLogical %10 %27 %27
120         %31 = OpShiftRightArithmetic %10 %30 %18
121               OpBranch %37
122         %37 = OpLabel
123         %71 = OpPhi %10 %21 %5 %47 %40
124         %45 = OpSLessThan %44 %31 %43
125               OpLoopMerge %39 %40 None
126               OpBranchConditional %45 %38 %39
127         %38 = OpLabel
128         %47 = OpIAdd %10 %71 %18
129         %50 = OpAccessChain %19 %16 %17 %49
130         %51 = OpLoad %10 %50
131         %52 = OpIEqual %44 %47 %51
132               OpSelectionMerge %54 None
133               OpBranchConditional %52 %53 %54
134         %53 = OpLabel
135         %57 = OpConvertSToF %6 %27
136         %67 = OpCompositeConstruct %7 %57 %22 %22 %57
137               OpStore %9 %67
138               OpBranch %39
139         %54 = OpLabel
140               OpBranch %40
141         %40 = OpLabel
142               OpBranch %37
143         %39 = OpLabel
144               OpReturn
145               OpFunctionEnd
146END
147
148# uniforms for variant
149
150# _GLF_uniform_int_values
151BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
152 1 0 10
153END
154
155BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
156
157PIPELINE graphics variant_pipeline
158  ATTACH variant_vertex_shader
159  ATTACH variant_fragment_shader
160  FRAMEBUFFER_SIZE 256 256
161  BIND BUFFER variant_framebuffer AS color LOCATION 0
162  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 0
163END
164CLEAR_COLOR variant_pipeline 0 0 0 255
165
166CLEAR variant_pipeline
167RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
168
169EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
170