| # 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 fragment shader with early return from loop in function |
| |
| # The test passes because the fragment shader writes a red pixel, and then |
| # terminates without further output manipulation (the other write of red |
| # is not dynamically reachable) |
| |
| # Optimized using spirv-opt with the following arguments: |
| # '--merge-blocks' |
| # spirv-opt commit hash: 4a00a80c40484a6f6f72f48c9d34943cf8f180d4 |
| |
| # Derived from the following GLSL. |
| |
| # Fragment shader GLSL: |
| # #version 310 es |
| # |
| # precision highp float; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # float f() |
| # { |
| # for( |
| # int i = 1; |
| # i < 10; |
| # i ++ |
| # ) |
| # { |
| # if(float(i) >= 1.0) |
| # { |
| # return 1.0; |
| # } |
| # } |
| # return 1.0; |
| # } |
| # void main() |
| # { |
| # vec4 c = vec4(1.0, 0.0, 0.0, 1.0); |
| # for( |
| # int i = 0; |
| # i < 1; |
| # i ++ |
| # ) |
| # { |
| # c.x = f(); |
| # } |
| # _GLF_color = c; |
| # } |
| |
| [require] |
| fbsize 256 256 |
| |
| [vertex shader passthrough] |
| |
| [fragment shader spirv] |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 7 |
| ; Bound: 59 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %56 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %8 "f(" |
| OpName %12 "i" |
| OpName %36 "c" |
| OpName %39 "i" |
| OpName %56 "_GLF_color" |
| OpDecorate %12 RelaxedPrecision |
| OpDecorate %19 RelaxedPrecision |
| OpDecorate %23 RelaxedPrecision |
| OpDecorate %30 RelaxedPrecision |
| OpDecorate %31 RelaxedPrecision |
| OpDecorate %39 RelaxedPrecision |
| OpDecorate %46 RelaxedPrecision |
| OpDecorate %53 RelaxedPrecision |
| OpDecorate %54 RelaxedPrecision |
| OpDecorate %56 Location 0 |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeFunction %6 |
| %10 = OpTypeInt 32 1 |
| %11 = OpTypePointer Function %10 |
| %13 = OpConstant %10 1 |
| %20 = OpConstant %10 10 |
| %21 = OpTypeBool |
| %25 = OpConstant %6 1 |
| %34 = OpTypeVector %6 4 |
| %35 = OpTypePointer Function %34 |
| %37 = OpConstant %6 0 |
| %38 = OpConstantComposite %34 %25 %37 %37 %25 |
| %40 = OpConstant %10 0 |
| %49 = OpTypeInt 32 0 |
| %50 = OpConstant %49 0 |
| %51 = OpTypePointer Function %6 |
| %55 = OpTypePointer Output %34 |
| %56 = OpVariable %55 Output |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %36 = OpVariable %35 Function |
| %39 = OpVariable %11 Function |
| OpStore %36 %38 |
| OpStore %39 %40 |
| OpBranch %41 |
| %41 = OpLabel |
| %46 = OpLoad %10 %39 |
| %47 = OpSLessThan %21 %46 %13 |
| OpLoopMerge %43 %42 None |
| OpBranchConditional %47 %42 %43 |
| %42 = OpLabel |
| %48 = OpFunctionCall %6 %8 |
| %52 = OpAccessChain %51 %36 %50 |
| OpStore %52 %48 |
| %53 = OpLoad %10 %39 |
| %54 = OpIAdd %10 %53 %13 |
| OpStore %39 %54 |
| OpBranch %41 |
| %43 = OpLabel |
| %57 = OpLoad %34 %36 |
| OpStore %56 %57 |
| OpReturn |
| OpFunctionEnd |
| %8 = OpFunction %6 None %7 |
| %9 = OpLabel |
| %12 = OpVariable %11 Function |
| OpStore %12 %13 |
| OpBranch %14 |
| %14 = OpLabel |
| %19 = OpLoad %10 %12 |
| %22 = OpSLessThan %21 %19 %20 |
| OpLoopMerge %16 %28 None |
| OpBranchConditional %22 %15 %16 |
| %15 = OpLabel |
| %23 = OpLoad %10 %12 |
| %24 = OpConvertSToF %6 %23 |
| %26 = OpFOrdGreaterThanEqual %21 %24 %25 |
| OpSelectionMerge %58 None |
| OpBranchConditional %26 %27 %28 |
| %27 = OpLabel |
| OpReturnValue %25 |
| %58 = OpLabel |
| OpBranch %28 |
| %28 = OpLabel |
| %30 = OpLoad %10 %12 |
| %31 = OpIAdd %10 %30 %13 |
| OpStore %12 %31 |
| OpBranch %14 |
| %16 = OpLabel |
| OpReturnValue %25 |
| OpFunctionEnd |
| |
| |
| [test] |
| draw rect -1 -1 2 2 |
| probe rgba (0, 0) (1, 0, 0, 1) |