#!amber

# Copyright 2019 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 bug found by GraphicsFuzz.

# Short description: A fragment shader that assigns vector values

# The test passes because shader always writes red.

# Optimized using spirv-opt with the following arguments:
# '--eliminate-dead-branches'
# '--eliminate-dead-inserts'
# '--combine-access-chains'
# '--eliminate-local-multi-store'
# '--simplify-instructions'
# '--eliminate-dead-branches'
# '--vector-dce'
# '--combine-access-chains'
# '--eliminate-local-single-store'
# '--eliminate-local-multi-store'
# '--eliminate-dead-inserts'
# '--if-conversion'
# '--copy-propagate-arrays'
# '--combine-access-chains'
# spirv-opt commit hash: e82a428605f6ce0a07337b36f8ba3935c9f165ac


SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# precision highp float;
#
# layout(location = 0) out vec4 _GLF_color;
#
# int func()
# {
#     vec4 tmp;
#     float tmp2[1];
#     float tmp3;
#     vec2 coord = vec2(1.0);
#
#     if (int(coord.y) < 180) // Always true
#         tmp3 = tmp2[0];
#     else
#         discard;
#
#     tmp = vec4(tmp3);
#     return 1;
# }
#
# void main()
# {
#     if (func() == 1)
#         _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
#     else
#         _GLF_color = vec4(0.0, 0.0, 0.0, 1.0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 54
; 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 "func("
               OpName %13 "coord"
               OpName %27 "tmp3"
               OpName %30 "tmp2"
               OpName %38 "tmp"
               OpName %49 "_GLF_color"
               OpDecorate %8 RelaxedPrecision
               OpDecorate %44 RelaxedPrecision
               OpDecorate %49 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypeFunction %6
         %10 = OpTypeFloat 32
         %11 = OpTypeVector %10 2
         %12 = OpTypePointer Function %11
         %14 = OpConstant %10 1
         %15 = OpConstantComposite %11 %14 %14
         %16 = OpTypeInt 32 0
         %17 = OpConstant %16 1
         %18 = OpTypePointer Function %10
         %22 = OpConstant %6 180
         %23 = OpTypeBool
         %28 = OpTypeArray %10 %17
         %29 = OpTypePointer Function %28
         %31 = OpConstant %6 0
         %36 = OpTypeVector %10 4
         %37 = OpTypePointer Function %36
         %41 = OpConstant %6 1
         %48 = OpTypePointer Output %36
         %49 = OpVariable %48 Output
         %50 = OpConstant %10 0
         %51 = OpConstantComposite %36 %14 %50 %50 %14
         %53 = OpConstantComposite %36 %50 %50 %50 %14
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %44 = OpFunctionCall %6 %8
         %45 = OpIEqual %23 %44 %41
               OpSelectionMerge %47 None
               OpBranchConditional %45 %46 %52
         %46 = OpLabel
               OpStore %49 %51
               OpBranch %47
         %52 = OpLabel
               OpStore %49 %53
               OpBranch %47
         %47 = OpLabel
               OpReturn
               OpFunctionEnd
          %8 = OpFunction %6 None %7
          %9 = OpLabel
         %13 = OpVariable %12 Function
         %27 = OpVariable %18 Function
         %30 = OpVariable %29 Function
         %38 = OpVariable %37 Function
               OpStore %13 %15
         %19 = OpAccessChain %18 %13 %17
         %20 = OpLoad %10 %19
         %21 = OpConvertFToS %6 %20
         %24 = OpSLessThan %23 %21 %22
               OpSelectionMerge %26 None
               OpBranchConditional %24 %25 %34
         %25 = OpLabel
         %32 = OpAccessChain %18 %30 %31
         %33 = OpLoad %10 %32
               OpStore %27 %33
               OpBranch %26
         %34 = OpLabel
               OpKill
         %26 = OpLabel
         %40 = OpCompositeConstruct %36 %33 %33 %33 %33
               OpStore %38 %40
               OpReturnValue %41
               OpFunctionEnd
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
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