xref: /third_party/vk-gl-cts/external/vulkancts/data/vulkan/amber/graphicsfuzz/cov-descending-loop-min-max-always-zero.amber

#!amber

# Copyright 2021 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 coverage-gap found by the GraphicsFuzz project.

# Short description: A fragment shader that covers specific BRW code paths

# The test passes because the shader always writes red.

SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 320 es
# #define _int_0 _GLF_uniform_int_values[0]
# #define _int_10 _GLF_uniform_int_values[1]
# #define _int_1 _GLF_uniform_int_values[2]
# #define _float_0_0 _GLF_uniform_float_values[0]
# #define _float_1_0 _GLF_uniform_float_values[1]
#
# precision highp int;
# precision highp float;
#
# // Contents of _GLF_uniform_float_values: [0.0, 1.0]
# layout(set = 0, binding = 0) uniform buf0
# {
#     float _GLF_uniform_float_values[2];
# };
#
# // Contents of _GLF_uniform_int_values: [0, 10, 1]
# layout(set = 0, binding = 1) uniform buf1
# {
#     int _GLF_uniform_int_values[3];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     float f = _float_1_0;
#
#     for (int i = _int_10; i > _int_0; i--)
#     {
#         float a = 1.0 - max(1.0, float(i));
#         // Always sets f to zero.
#         f = min(max(a, 0.0), 0.0);
#     }
#
#     // Always true.
#     if(f == _float_0_0)
#     {
#         _GLF_color = vec4(_int_1, f, _int_0, 1);
#     }
#     else
#     {
#         _GLF_color = vec4(0);
#     }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 73
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %61
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "f"
               OpName %12 "buf0"
               OpMemberName %12 0 "_GLF_uniform_float_values"
               OpName %14 ""
               OpName %22 "i"
               OpName %25 "buf1"
               OpMemberName %25 0 "_GLF_uniform_int_values"
               OpName %27 ""
               OpName %41 "a"
               OpName %61 "_GLF_color"
               OpDecorate %11 ArrayStride 16
               OpMemberDecorate %12 0 Offset 0
               OpDecorate %12 Block
               OpDecorate %14 DescriptorSet 0
               OpDecorate %14 Binding 0
               OpDecorate %24 ArrayStride 16
               OpMemberDecorate %25 0 Offset 0
               OpDecorate %25 Block
               OpDecorate %27 DescriptorSet 0
               OpDecorate %27 Binding 1
               OpDecorate %61 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypePointer Function %6
          %9 = OpTypeInt 32 0
         %10 = OpConstant %9 2
         %11 = OpTypeArray %6 %10
         %12 = OpTypeStruct %11
         %13 = OpTypePointer Uniform %12
         %14 = OpVariable %13 Uniform
         %15 = OpTypeInt 32 1
         %16 = OpConstant %15 0
         %17 = OpConstant %15 1
         %18 = OpTypePointer Uniform %6
         %21 = OpTypePointer Function %15
         %23 = OpConstant %9 3
         %24 = OpTypeArray %15 %23
         %25 = OpTypeStruct %24
         %26 = OpTypePointer Uniform %25
         %27 = OpVariable %26 Uniform
         %28 = OpTypePointer Uniform %15
         %39 = OpTypeBool
         %42 = OpConstant %6 1
         %48 = OpConstant %6 0
         %59 = OpTypeVector %6 4
         %60 = OpTypePointer Output %59
         %61 = OpVariable %60 Output
         %62 = OpConstant %15 2
         %72 = OpConstantComposite %59 %48 %48 %48 %48
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %22 = OpVariable %21 Function
         %41 = OpVariable %7 Function
         %19 = OpAccessChain %18 %14 %16 %17
         %20 = OpLoad %6 %19
               OpStore %8 %20
         %29 = OpAccessChain %28 %27 %16 %17
         %30 = OpLoad %15 %29
               OpStore %22 %30
               OpBranch %31
         %31 = OpLabel
               OpLoopMerge %33 %34 None
               OpBranch %35
         %35 = OpLabel
         %36 = OpLoad %15 %22
         %37 = OpAccessChain %28 %27 %16 %16
         %38 = OpLoad %15 %37
         %40 = OpSGreaterThan %39 %36 %38
               OpBranchConditional %40 %32 %33
         %32 = OpLabel
         %43 = OpLoad %15 %22
         %44 = OpConvertSToF %6 %43
         %45 = OpExtInst %6 %1 FMax %42 %44
         %46 = OpFSub %6 %42 %45
               OpStore %41 %46
         %47 = OpLoad %6 %41
         %49 = OpExtInst %6 %1 FMax %47 %48
         %50 = OpExtInst %6 %1 FMin %49 %48
               OpStore %8 %50
               OpBranch %34
         %34 = OpLabel
         %51 = OpLoad %15 %22
         %52 = OpISub %15 %51 %17
               OpStore %22 %52
               OpBranch %31
         %33 = OpLabel
         %53 = OpLoad %6 %8
         %54 = OpAccessChain %18 %14 %16 %16
         %55 = OpLoad %6 %54
         %56 = OpFOrdEqual %39 %53 %55
               OpSelectionMerge %58 None
               OpBranchConditional %56 %57 %71
         %57 = OpLabel
         %63 = OpAccessChain %28 %27 %16 %62
         %64 = OpLoad %15 %63
         %65 = OpConvertSToF %6 %64
         %66 = OpLoad %6 %8
         %67 = OpAccessChain %28 %27 %16 %16
         %68 = OpLoad %15 %67
         %69 = OpConvertSToF %6 %68
         %70 = OpCompositeConstruct %59 %65 %66 %69 %42
               OpStore %61 %70
               OpBranch %58
         %71 = OpLabel
               OpStore %61 %72
               OpBranch %58
         %58 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 0 10 1
END
# _GLF_uniform_float_values
BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
 0.0 1.0
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
  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 1
  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 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