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#!amber
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# Copyright 2019 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# A test for a bug found by GraphicsFuzz.
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# Short description: A fragment shader with uninitialized element cast in loop
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# The test passes because main always writes the color red.
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# Optimized using spirv-opt with the following arguments:
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# '--inline-entry-points-exhaustive'
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# '--eliminate-local-single-block'
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# '--ccp'
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# '--eliminate-local-multi-store'
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# '--inline-entry-points-exhaustive'
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# '--combine-access-chains'
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# '--combine-access-chains'
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# '--reduce-load-size'
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# '--copy-propagate-arrays'
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# '--reduce-load-size'
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# '--eliminate-local-multi-store'
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# '--scalar-replacement=100'
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# '--convert-local-access-chains'
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# '--scalar-replacement=100'
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# '--vector-dce'
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# '--eliminate-dead-inserts'
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# '--scalar-replacement=100'
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# '--eliminate-dead-inserts'
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# '--simplify-instructions'
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# '--eliminate-dead-branches'
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# '--merge-blocks'
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# '--ccp'
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# '--copy-propagate-arrays'
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# '--combine-access-chains'
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# '--eliminate-local-multi-store'
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# spirv-opt commit hash: 06407250a169c6a03b3765e86619075af1a8c187
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SHADER vertex variant_vertex_shader PASSTHROUGH
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# variant_fragment_shader is derived from the following GLSL:
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# #version 310 es
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# precision highp float;
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#
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# layout(location = 0) out vec4 _GLF_color;
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# layout(set = 0, binding = 0) uniform buf0 { vec2 injectionSwitch; };
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#
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# void main()
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# {
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# while(true)
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# {
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# while(false)
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# break;
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#
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# float uninit[1];
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# float(uninit[0]);
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#
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# if (injectionSwitch.x < injectionSwitch.y) // always true
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# {
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# _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
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# return;
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# }
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# }
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# }
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SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
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; SPIR-V
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; Version: 1.0
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; Generator: Khronos Glslang Reference Front End; 7
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; Bound: 56
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; Schema: 0
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OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %4 "main" %46
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OpExecutionMode %4 OriginUpperLeft
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OpSource ESSL 310
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OpName %4 "main"
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OpName %32 "buf0"
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OpMemberName %32 0 "injectionSwitch"
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OpName %34 ""
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OpName %46 "_GLF_color"
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OpMemberDecorate %32 0 Offset 0
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OpDecorate %32 Block
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OpDecorate %34 DescriptorSet 0
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OpDecorate %34 Binding 0
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OpDecorate %46 Location 0
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%2 = OpTypeVoid
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%3 = OpTypeFunction %2
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%11 = OpTypeBool
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%12 = OpConstantTrue %11
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%18 = OpConstantFalse %11
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%20 = OpTypeFloat 32
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%21 = OpTypeInt 32 0
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%22 = OpConstant %21 1
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%23 = OpTypeArray %20 %22
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%24 = OpTypePointer Function %23
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%26 = OpTypeInt 32 1
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%27 = OpConstant %26 0
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%28 = OpTypePointer Function %20
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%31 = OpTypeVector %20 2
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%32 = OpTypeStruct %31
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%33 = OpTypePointer Uniform %32
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%34 = OpVariable %33 Uniform
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%35 = OpConstant %21 0
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%36 = OpTypePointer Uniform %20
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%44 = OpTypeVector %20 4
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%45 = OpTypePointer Output %44
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%46 = OpVariable %45 Output
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%47 = OpConstant %20 1
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%48 = OpConstant %20 0
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%49 = OpConstantComposite %44 %47 %48 %48 %47
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%54 = OpUndef %20
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%4 = OpFunction %2 None %3
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%5 = OpLabel
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%51 = OpVariable %28 Function
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OpBranch %6
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%6 = OpLabel
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%53 = OpPhi %20 %54 %5 %52 %43
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OpLoopMerge %8 %43 None
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OpBranch %13
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%13 = OpLabel
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%52 = OpPhi %20 %53 %6 %54 %16
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%37 = OpAccessChain %36 %34 %27 %35
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%38 = OpLoad %20 %37
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%39 = OpAccessChain %36 %34 %27 %22
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%40 = OpLoad %20 %39
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%41 = OpFOrdLessThan %11 %38 %40
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OpSelectionMerge %55 None
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OpBranchConditional %41 %42 %43
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%16 = OpLabel
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OpBranch %13
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%42 = OpLabel
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OpStore %46 %49
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OpReturn
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%55 = OpLabel
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OpBranch %43
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%43 = OpLabel
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OpBranch %6
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%8 = OpLabel
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OpUnreachable
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OpFunctionEnd
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END
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# uniforms for variant
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# injectionSwitch
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BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
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0.0 1.0
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END
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BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
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PIPELINE graphics variant_pipeline
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ATTACH variant_vertex_shader
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ATTACH variant_fragment_shader
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FRAMEBUFFER_SIZE 256 256
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BIND BUFFER variant_framebuffer AS color LOCATION 0
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BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0
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END
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CLEAR_COLOR variant_pipeline 0 0 0 255
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CLEAR variant_pipeline
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RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
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EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
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