#!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 and or xor 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 int;
#
# precision highp float;
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     int a = 1;
#
#     for (int i = 0; i < 2; i++)
#     {
#         a = bitfieldInsert(1, 1, 1, i);
#     }
#
#     if (a == 3) {
#         _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; 10
; Bound: 39
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %33
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "a"
               OpName %10 "i"
               OpName %33 "_GLF_color"
               OpDecorate %33 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 1
         %11 = OpConstant %6 0
         %18 = OpConstant %6 2
         %19 = OpTypeBool
         %26 = OpConstant %6 3
         %30 = OpTypeFloat 32
         %31 = OpTypeVector %30 4
         %32 = OpTypePointer Output %31
         %33 = OpVariable %32 Output
         %34 = OpConstant %30 1
         %35 = OpConstant %30 0
         %36 = OpConstantComposite %31 %34 %35 %35 %34
         %38 = OpConstantComposite %31 %35 %35 %35 %35
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %10 = OpVariable %7 Function
               OpStore %8 %9
               OpStore %10 %11
               OpBranch %12
         %12 = OpLabel
               OpLoopMerge %14 %15 None
               OpBranch %16
         %16 = OpLabel
         %17 = OpLoad %6 %10
         %20 = OpSLessThan %19 %17 %18
               OpBranchConditional %20 %13 %14
         %13 = OpLabel
         %21 = OpLoad %6 %10
         %22 = OpBitFieldInsert %6 %9 %9 %9 %21
               OpStore %8 %22
               OpBranch %15
         %15 = OpLabel
         %23 = OpLoad %6 %10
         %24 = OpIAdd %6 %23 %9
               OpStore %10 %24
               OpBranch %12
         %14 = OpLabel
         %25 = OpLoad %6 %8
         %27 = OpIEqual %19 %25 %26
               OpSelectionMerge %29 None
               OpBranchConditional %27 %28 %37
         %28 = OpLabel
               OpStore %33 %36
               OpBranch %29
         %37 = OpLabel
               OpStore %33 %38
               OpBranch %29
         %29 = OpLabel
               OpReturn
               OpFunctionEnd
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
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