#!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 LLVM 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_1 _GLF_uniform_int_values[0]
#
# precision highp float;
# precision highp int;
#
# // Contents of _GLF_uniform_int_values: 1
# layout(set = 0, binding = 0) uniform buf0
# {
#     int _GLF_uniform_int_values[1];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     int i = _int_1;
#     _GLF_color = vec4(0.0, 1.0, 0.0, 1.0);
#
#     vec4 v = _GLF_color;
#     v[i - _int_1] = v[i];
#     v[i] = v[i + _int_1];
#     _GLF_color = v;
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 47
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %22
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "i"
               OpName %12 "buf0"
               OpMemberName %12 0 "_GLF_uniform_int_values"
               OpName %14 ""
               OpName %22 "_GLF_color"
               OpName %27 "v"
               OpDecorate %11 ArrayStride 16
               OpMemberDecorate %12 0 Offset 0
               OpDecorate %12 Block
               OpDecorate %14 DescriptorSet 0
               OpDecorate %14 Binding 0
               OpDecorate %22 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpTypeInt 32 0
         %10 = OpConstant %9 1
         %11 = OpTypeArray %6 %10
         %12 = OpTypeStruct %11
         %13 = OpTypePointer Uniform %12
         %14 = OpVariable %13 Uniform
         %15 = OpConstant %6 0
         %16 = OpTypePointer Uniform %6
         %19 = OpTypeFloat 32
         %20 = OpTypeVector %19 4
         %21 = OpTypePointer Output %20
         %22 = OpVariable %21 Output
         %23 = OpConstant %19 0
         %24 = OpConstant %19 1
         %25 = OpConstantComposite %20 %23 %24 %23 %24
         %26 = OpTypePointer Function %20
         %34 = OpTypePointer Function %19
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %27 = OpVariable %26 Function
         %17 = OpAccessChain %16 %14 %15 %15
         %18 = OpLoad %6 %17
               OpStore %8 %18
               OpStore %22 %25
         %28 = OpLoad %20 %22
               OpStore %27 %28
         %29 = OpLoad %6 %8
         %30 = OpAccessChain %16 %14 %15 %15
         %31 = OpLoad %6 %30
         %32 = OpISub %6 %29 %31
         %33 = OpLoad %6 %8
         %35 = OpAccessChain %34 %27 %33
         %36 = OpLoad %19 %35
         %37 = OpAccessChain %34 %27 %32
               OpStore %37 %36
         %38 = OpLoad %6 %8
         %39 = OpLoad %6 %8
         %40 = OpAccessChain %16 %14 %15 %15
         %41 = OpLoad %6 %40
         %42 = OpIAdd %6 %39 %41
         %43 = OpAccessChain %34 %27 %42
         %44 = OpLoad %19 %43
         %45 = OpAccessChain %34 %27 %38
               OpStore %45 %44
         %46 = OpLoad %20 %27
               OpStore %22 %46
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 1
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 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