#!amber

# Copyright 2020 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 GraphicsFuzz.

# Short description: A fragment shader that covers a specific instruction simplification code path

# 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 310 es
# precision highp float;
# precision highp int;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#     int two;
# };
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     int i = 0;
#
#     for(int r = 0; r < two * 4; r += 2)
#         i += ivec4(1, 2, 3, 4)[r / two];
#
#     if (i == 10)
#         _GLF_color = vec4(1, 0, 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; 8
; Bound: 55
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %49
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "i"
               OpName %10 "r"
               OpName %17 "buf0"
               OpMemberName %17 0 "two"
               OpName %19 ""
               OpName %49 "_GLF_color"
               OpMemberDecorate %17 0 Offset 0
               OpDecorate %17 Block
               OpDecorate %19 DescriptorSet 0
               OpDecorate %19 Binding 0
               OpDecorate %49 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 0
         %17 = OpTypeStruct %6
         %18 = OpTypePointer Uniform %17
         %19 = OpVariable %18 Uniform
         %20 = OpTypePointer Uniform %6
         %23 = OpConstant %6 4
         %25 = OpTypeBool
         %27 = OpTypeVector %6 4
         %28 = OpConstant %6 1
         %29 = OpConstant %6 2
         %30 = OpConstant %6 3
         %31 = OpConstantComposite %27 %28 %29 %30 %23
         %42 = OpConstant %6 10
         %46 = OpTypeFloat 32
         %47 = OpTypeVector %46 4
         %48 = OpTypePointer Output %47
         %49 = OpVariable %48 Output
         %50 = OpConstant %46 1
         %51 = OpConstant %46 0
         %52 = OpConstantComposite %47 %50 %51 %51 %50
         %54 = OpConstantComposite %47 %51 %51 %51 %51
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %10 = OpVariable %7 Function
               OpStore %8 %9
               OpStore %10 %9
               OpBranch %11
         %11 = OpLabel
               OpLoopMerge %13 %14 None
               OpBranch %15
         %15 = OpLabel
         %16 = OpLoad %6 %10
         %21 = OpAccessChain %20 %19 %9
         %22 = OpLoad %6 %21
         %24 = OpIMul %6 %22 %23
         %26 = OpSLessThan %25 %16 %24
               OpBranchConditional %26 %12 %13
         %12 = OpLabel
         %32 = OpLoad %6 %10
         %33 = OpAccessChain %20 %19 %9
         %34 = OpLoad %6 %33
         %35 = OpSDiv %6 %32 %34
         %36 = OpVectorExtractDynamic %6 %31 %35
         %37 = OpLoad %6 %8
         %38 = OpIAdd %6 %37 %36
               OpStore %8 %38
               OpBranch %14
         %14 = OpLabel
         %39 = OpLoad %6 %10
         %40 = OpIAdd %6 %39 %29
               OpStore %10 %40
               OpBranch %11
         %13 = OpLabel
         %41 = OpLoad %6 %8
         %43 = OpIEqual %25 %41 %42
               OpSelectionMerge %45 None
               OpBranchConditional %43 %44 %53
         %44 = OpLabel
               OpStore %49 %52
               OpBranch %45
         %53 = OpLabel
               OpStore %49 %54
               OpBranch %45
         %45 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# two
BUFFER variant_two DATA_TYPE int32 DATA
 2
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_two 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