| #!amber |
| |
| # Copyright 2019 Google LLC |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| |
| # A test for a bug found by GraphicsFuzz. |
| |
| # Short description: Shader with matrix multiplication in loop |
| |
| # 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 |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--simplify-instructions' |
| # '--combine-access-chains' |
| # '--eliminate-dead-branches' |
| # '--merge-return' |
| # '--combine-access-chains' |
| # '--eliminate-dead-code-aggressive' |
| # '--reduce-load-size' |
| # '--eliminate-local-single-block' |
| # '--private-to-local' |
| # '--inline-entry-points-exhaustive' |
| # '--copy-propagate-arrays' |
| # '--eliminate-local-multi-store' |
| # '--scalar-replacement=100' |
| # '--eliminate-dead-branches' |
| # '--eliminate-local-single-store' |
| # spirv-opt commit hash: f1e5cd73f658abcc23ee96d78f2dc27c4b7028c1 |
| |
| |
| |
| SHADER vertex variant_vertex_shader PASSTHROUGH |
| |
| # variant_fragment_shader is derived from the following GLSL: |
| # #version 310 es |
| # precision highp float; |
| # |
| # precision highp int; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # void main(void) |
| # { |
| # vec2 v; |
| # mat2 m1 = mat2(1.0, 0.0, 0.0, 1.0); |
| # for( |
| # int i = 0; |
| # i < 1; |
| # i++ |
| # ) |
| # { |
| # do |
| # { |
| # mat2 m2; |
| # m2 = m1 * m1; |
| # v = m2 * vec2(1.0, 0.0); |
| # } |
| # while(false); |
| # } |
| # _GLF_color = vec4(v, 0.0, 1.0); |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 8 |
| ; Bound: 56 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %46 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %10 "m1" |
| OpName %18 "i" |
| OpName %33 "m2" |
| OpName %38 "v" |
| OpName %46 "_GLF_color" |
| OpDecorate %46 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeVector %6 2 |
| %8 = OpTypeMatrix %7 2 |
| %9 = OpTypePointer Function %8 |
| %11 = OpConstant %6 1 |
| %12 = OpConstant %6 0 |
| %13 = OpConstantComposite %7 %11 %12 |
| %14 = OpConstantComposite %7 %12 %11 |
| %15 = OpConstantComposite %8 %13 %14 |
| %16 = OpTypeInt 32 1 |
| %17 = OpTypePointer Function %16 |
| %19 = OpConstant %16 0 |
| %26 = OpConstant %16 1 |
| %27 = OpTypeBool |
| %37 = OpTypePointer Function %7 |
| %41 = OpConstantFalse %27 |
| %44 = OpTypeVector %6 4 |
| %45 = OpTypePointer Output %44 |
| %46 = OpVariable %45 Output |
| %53 = OpUndef %7 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %10 = OpVariable %9 Function |
| %18 = OpVariable %17 Function |
| %33 = OpVariable %9 Function |
| %38 = OpVariable %37 Function |
| OpStore %10 %15 |
| OpStore %18 %19 |
| OpBranch %20 |
| %20 = OpLabel |
| %55 = OpPhi %8 %15 %5 %55 %23 |
| %52 = OpPhi %7 %53 %5 %40 %23 |
| %51 = OpPhi %16 %19 %5 %43 %23 |
| OpLoopMerge %22 %23 None |
| OpBranch %24 |
| %24 = OpLabel |
| %28 = OpSLessThan %27 %51 %26 |
| OpBranchConditional %28 %21 %22 |
| %21 = OpLabel |
| OpBranch %29 |
| %29 = OpLabel |
| OpLoopMerge %31 %32 None |
| OpBranch %30 |
| %30 = OpLabel |
| %36 = OpMatrixTimesMatrix %8 %55 %55 |
| OpStore %33 %36 |
| %40 = OpMatrixTimesVector %7 %36 %13 |
| OpStore %38 %40 |
| OpBranch %32 |
| %32 = OpLabel |
| OpBranchConditional %41 %29 %31 |
| %31 = OpLabel |
| OpBranch %23 |
| %23 = OpLabel |
| %43 = OpIAdd %16 %51 %26 |
| OpStore %18 %43 |
| OpBranch %20 |
| %22 = OpLabel |
| %48 = OpCompositeExtract %6 %52 0 |
| %49 = OpCompositeExtract %6 %52 1 |
| %50 = OpCompositeConstruct %44 %48 %49 %12 %11 |
| OpStore %46 %50 |
| OpReturn |
| OpFunctionEnd |
| END |
| |
| |
| BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM |
| |
| PIPELINE graphics variant_pipeline |
| ATTACH variant_vertex_shader |
| ATTACH variant_fragment_shader |
| FRAMEBUFFER_SIZE 256 256 |
| BIND BUFFER variant_framebuffer AS color LOCATION 0 |
| END |
| CLEAR_COLOR variant_pipeline 0 0 0 255 |
| |
| CLEAR variant_pipeline |
| RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 |
| |
| EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 |