| #!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: A compute shader with two nested for loops |
| |
| # The test passes because main always outputs 42.0. |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--private-to-local' |
| # '--eliminate-local-multi-store' |
| # '--simplify-instructions' |
| # '--eliminate-dead-inserts' |
| # '--eliminate-dead-branches' |
| # spirv-opt commit hash: 4a00a80c40484a6f6f72f48c9d34943cf8f180d4 |
| |
| |
| |
| # variant_compute_shader is derived from the following GLSL: |
| # #version 310 es |
| # |
| # precision highp float; |
| # |
| # layout(std430, binding = 0) buffer doesNotMatter |
| # { |
| # float _compute_data[]; |
| # }; |
| # |
| # float nb_mod() |
| # { |
| # float s = 0.0; |
| # |
| # // Loop is entered, but we always return 42.0 during the first iteration. |
| # for ( |
| # int i = 5; |
| # i < 800; |
| # i++) |
| # { |
| # int GLF_live1_looplimiter2; |
| # |
| # // Loop is entered and we possibly return. |
| # for ( |
| # int GLF_live1i = 0; |
| # GLF_live1i < 20; |
| # ++GLF_live1i) |
| # { |
| # // GLF_live1_looplimiter2 is undefined, so we may break; doesn't matter. |
| # if (GLF_live1_looplimiter2 >= 5) |
| # { |
| # ++s; |
| # break; |
| # } |
| # // If we didn't break, we return 42.0 here. |
| # return 42.0; |
| # } |
| # |
| # if (float(i) <= s) // Always false: s is 0.0 or 1.0. |
| # { |
| # break; |
| # } |
| # // We return 42.0 and we don't loop. |
| # return 42.0; |
| # } |
| # // Unreachable at runtime. |
| # return s; |
| # } |
| # |
| # void main() |
| # { |
| # _compute_data[0] = nb_mod(); // Always returns 42.0. |
| # } |
| SHADER compute variant_compute_shader SPIRV-ASM TARGET_ENV spv1.0 |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 7 |
| ; Bound: 82 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint GLCompute %4 "main" |
| OpExecutionMode %4 LocalSize 1 1 1 |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %8 "nb_mod(" |
| OpName %11 "s" |
| OpName %15 "i" |
| OpName %26 "GLF_live1i" |
| OpName %36 "GLF_live1_looplimiter2" |
| OpName %64 "doesNotMatter" |
| OpMemberName %64 0 "_compute_data" |
| OpName %66 "" |
| OpDecorate %63 ArrayStride 4 |
| OpMemberDecorate %64 0 Offset 0 |
| OpDecorate %64 BufferBlock |
| OpDecorate %66 DescriptorSet 0 |
| OpDecorate %66 Binding 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeFunction %6 |
| %10 = OpTypePointer Function %6 |
| %12 = OpConstant %6 0 |
| %13 = OpTypeInt 32 1 |
| %14 = OpTypePointer Function %13 |
| %16 = OpConstant %13 5 |
| %23 = OpConstant %13 800 |
| %24 = OpTypeBool |
| %27 = OpConstant %13 0 |
| %34 = OpConstant %13 20 |
| %42 = OpConstant %6 1 |
| %45 = OpConstant %6 42 |
| %48 = OpConstant %13 1 |
| %63 = OpTypeRuntimeArray %6 |
| %64 = OpTypeStruct %63 |
| %65 = OpTypePointer Uniform %64 |
| %66 = OpVariable %65 Uniform |
| %68 = OpTypePointer Uniform %6 |
| %74 = OpUndef %13 |
| %81 = OpUndef %6 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %67 = OpFunctionCall %6 %8 |
| %69 = OpAccessChain %68 %66 %27 %27 |
| OpStore %69 %67 |
| OpReturn |
| OpFunctionEnd |
| %8 = OpFunction %6 None %7 |
| %9 = OpLabel |
| %11 = OpVariable %10 Function |
| %15 = OpVariable %14 Function |
| %26 = OpVariable %14 Function |
| %36 = OpVariable %14 Function |
| OpStore %11 %12 |
| OpStore %15 %16 |
| OpBranch %17 |
| %17 = OpLabel |
| OpLoopMerge %19 %20 None |
| OpBranch %21 |
| %21 = OpLabel |
| %25 = OpSLessThan %24 %16 %23 |
| OpBranchConditional %25 %18 %19 |
| %18 = OpLabel |
| OpStore %26 %27 |
| OpBranch %28 |
| %28 = OpLabel |
| OpLoopMerge %30 %31 None |
| OpBranch %32 |
| %32 = OpLabel |
| %35 = OpSLessThan %24 %27 %34 |
| OpBranchConditional %35 %29 %30 |
| %29 = OpLabel |
| %38 = OpSGreaterThanEqual %24 %74 %16 |
| OpSelectionMerge %40 None |
| OpBranchConditional %38 %39 %40 |
| %39 = OpLabel |
| %43 = OpFAdd %6 %12 %42 |
| OpStore %11 %43 |
| OpBranch %30 |
| %40 = OpLabel |
| OpReturnValue %45 |
| %31 = OpLabel |
| OpBranch %28 |
| %30 = OpLabel |
| %79 = OpPhi %6 %12 %32 %43 %39 |
| %51 = OpConvertSToF %6 %16 |
| %53 = OpFOrdLessThanEqual %24 %51 %79 |
| OpSelectionMerge %55 None |
| OpBranchConditional %53 %54 %55 |
| %54 = OpLabel |
| OpBranch %19 |
| %55 = OpLabel |
| OpReturnValue %45 |
| %20 = OpLabel |
| OpBranch %17 |
| %19 = OpLabel |
| %80 = OpPhi %6 %12 %21 %79 %54 |
| OpReturnValue %80 |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| |
| BUFFER variant_ssbo DATA_TYPE float DATA |
| 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 |
| END |
| |
| PIPELINE compute variant_pipeline |
| ATTACH variant_compute_shader |
| BIND BUFFER variant_ssbo AS storage DESCRIPTOR_SET 0 BINDING 0 |
| END |
| |
| RUN variant_pipeline 7 3 4 |
| |
| EXPECT variant_ssbo IDX 0 EQ 42.0 |