176 lines
5.2 KiB
Plaintext
176 lines
5.2 KiB
Plaintext
#!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: Shader with matrix multiplication in loop
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# The test passes because 'm1' is the identity matrix, so that 'm2' is also the identity matrix, meaning that 'v' gets set to '(1.0, 0.0)'. As a result, the colour that is written is guaranteed to be red
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# Optimized using spirv-opt with the following arguments:
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# '--simplify-instructions'
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# '--combine-access-chains'
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# '--eliminate-dead-branches'
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# '--merge-return'
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# '--combine-access-chains'
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# '--eliminate-dead-code-aggressive'
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# '--reduce-load-size'
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# '--eliminate-local-single-block'
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# '--private-to-local'
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# '--inline-entry-points-exhaustive'
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# '--copy-propagate-arrays'
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# '--eliminate-local-multi-store'
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# '--scalar-replacement=100'
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# '--eliminate-dead-branches'
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# '--eliminate-local-single-store'
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# spirv-opt commit hash: f1e5cd73f658abcc23ee96d78f2dc27c4b7028c1
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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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# precision highp int;
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#
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# layout(location = 0) out vec4 _GLF_color;
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#
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# void main(void)
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# {
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# vec2 v;
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# mat2 m1 = mat2(1.0, 0.0, 0.0, 1.0);
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# for(
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# int i = 0;
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# i < 1;
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# i++
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# )
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# {
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# do
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# {
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# mat2 m2;
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# m2 = m1 * m1;
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# v = m2 * vec2(1.0, 0.0);
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# }
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# while(false);
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# }
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# _GLF_color = vec4(v, 0.0, 1.0);
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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; 8
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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 %10 "m1"
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OpName %18 "i"
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OpName %33 "m2"
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OpName %38 "v"
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OpName %46 "_GLF_color"
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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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%6 = OpTypeFloat 32
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%7 = OpTypeVector %6 2
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%8 = OpTypeMatrix %7 2
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%9 = OpTypePointer Function %8
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%11 = OpConstant %6 1
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%12 = OpConstant %6 0
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%13 = OpConstantComposite %7 %11 %12
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%14 = OpConstantComposite %7 %12 %11
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%15 = OpConstantComposite %8 %13 %14
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%16 = OpTypeInt 32 1
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%17 = OpTypePointer Function %16
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%19 = OpConstant %16 0
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%26 = OpConstant %16 1
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%27 = OpTypeBool
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%37 = OpTypePointer Function %7
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%41 = OpConstantFalse %27
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%44 = OpTypeVector %6 4
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%45 = OpTypePointer Output %44
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%46 = OpVariable %45 Output
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%53 = OpUndef %7
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%4 = OpFunction %2 None %3
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%5 = OpLabel
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%10 = OpVariable %9 Function
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%18 = OpVariable %17 Function
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%33 = OpVariable %9 Function
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%38 = OpVariable %37 Function
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OpStore %10 %15
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OpStore %18 %19
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OpBranch %20
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%20 = OpLabel
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%55 = OpPhi %8 %15 %5 %55 %23
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%52 = OpPhi %7 %53 %5 %40 %23
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%51 = OpPhi %16 %19 %5 %43 %23
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OpLoopMerge %22 %23 None
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OpBranch %24
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%24 = OpLabel
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%28 = OpSLessThan %27 %51 %26
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OpBranchConditional %28 %21 %22
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%21 = OpLabel
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OpBranch %29
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%29 = OpLabel
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OpLoopMerge %31 %32 None
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OpBranch %30
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%30 = OpLabel
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%36 = OpMatrixTimesMatrix %8 %55 %55
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OpStore %33 %36
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%40 = OpMatrixTimesVector %7 %36 %13
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OpStore %38 %40
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OpBranch %32
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%32 = OpLabel
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OpBranchConditional %41 %29 %31
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%31 = OpLabel
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OpBranch %23
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%23 = OpLabel
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%43 = OpIAdd %16 %51 %26
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OpStore %18 %43
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OpBranch %20
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%22 = OpLabel
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%48 = OpCompositeExtract %6 %52 0
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%49 = OpCompositeExtract %6 %52 1
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%50 = OpCompositeConstruct %44 %48 %49 %12 %11
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OpStore %46 %50
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OpReturn
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OpFunctionEnd
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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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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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