#!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 the GraphicsFuzz project.

# Short description: A fragment shader that covers a specific inst combine simplify demanded 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
# #define _int_0 _GLF_uniform_int_values[0]
# #define _int_1 _GLF_uniform_int_values[1]
# #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, 1]
# layout(set = 0, binding = 1) uniform buf1
# {
#     int _GLF_uniform_int_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     vec4 color = vec4(_float_0_0, _float_0_0, _float_0_0, _float_1_0);
#     switch ((1 | _int_1) ^ 1)
#     {
#         case 0:
#             color[_int_0] = _float_1_0;
#             break;
#     }
#
#     _GLF_color = color;
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 51
; 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 %9 "color"
               OpName %13 "buf0"
               OpMemberName %13 0 "_GLF_uniform_float_values"
               OpName %15 ""
               OpName %30 "buf1"
               OpMemberName %30 0 "_GLF_uniform_int_values"
               OpName %32 ""
               OpName %49 "_GLF_color"
               OpDecorate %12 ArrayStride 16
               OpMemberDecorate %13 0 Offset 0
               OpDecorate %13 Block
               OpDecorate %15 DescriptorSet 0
               OpDecorate %15 Binding 0
               OpDecorate %29 ArrayStride 16
               OpMemberDecorate %30 0 Offset 0
               OpDecorate %30 Block
               OpDecorate %32 DescriptorSet 0
               OpDecorate %32 Binding 1
               OpDecorate %49 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 4
          %8 = OpTypePointer Function %7
         %10 = OpTypeInt 32 0
         %11 = OpConstant %10 2
         %12 = OpTypeArray %6 %11
         %13 = OpTypeStruct %12
         %14 = OpTypePointer Uniform %13
         %15 = OpVariable %14 Uniform
         %16 = OpTypeInt 32 1
         %17 = OpConstant %16 0
         %18 = OpTypePointer Uniform %6
         %25 = OpConstant %16 1
         %29 = OpTypeArray %16 %11
         %30 = OpTypeStruct %29
         %31 = OpTypePointer Uniform %30
         %32 = OpVariable %31 Uniform
         %33 = OpTypePointer Uniform %16
         %44 = OpTypePointer Function %6
         %48 = OpTypePointer Output %7
         %49 = OpVariable %48 Output
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %9 = OpVariable %8 Function
         %19 = OpAccessChain %18 %15 %17 %17
         %20 = OpLoad %6 %19
         %21 = OpAccessChain %18 %15 %17 %17
         %22 = OpLoad %6 %21
         %23 = OpAccessChain %18 %15 %17 %17
         %24 = OpLoad %6 %23
         %26 = OpAccessChain %18 %15 %17 %25
         %27 = OpLoad %6 %26
         %28 = OpCompositeConstruct %7 %20 %22 %24 %27
               OpStore %9 %28
         %34 = OpAccessChain %33 %32 %17 %25
         %35 = OpLoad %16 %34
         %36 = OpBitwiseOr %16 %25 %35
         %37 = OpBitwiseXor %16 %36 %25
               OpSelectionMerge %39 None
               OpSwitch %37 %39 0 %38
         %38 = OpLabel
         %40 = OpAccessChain %33 %32 %17 %17
         %41 = OpLoad %16 %40
         %42 = OpAccessChain %18 %15 %17 %25
         %43 = OpLoad %6 %42
         %45 = OpAccessChain %44 %9 %41
               OpStore %45 %43
               OpBranch %39
         %39 = OpLabel
         %50 = OpLoad %7 %9
               OpStore %49 %50
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 0 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 16 16
  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 16 16

EXPECT variant_framebuffer IDX 0 0 SIZE 16 16 EQ_RGBA 255 0 0 255