#!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 with uv value comparison as boolean

# The test passes because the shader always writes the color red.

# Optimized using spirv-opt with the following arguments:
# '--scalar-replacement=100'
# '--vector-dce'
# '--redundancy-elimination'
# '--ccp'
# '--redundancy-elimination'
# '--copy-propagate-arrays'
# '--eliminate-dead-code-aggressive'
# '--redundancy-elimination'
# '--vector-dce'
# '--inline-entry-points-exhaustive'
# '--private-to-local'
# '--if-conversion'
# '--if-conversion'
# '--eliminate-dead-code-aggressive'
# '--if-conversion'
# '--simplify-instructions'
# '--eliminate-local-multi-store'
# spirv-opt commit hash: ad7f2c5c4c7f51360e9e079109a9217aa5ba5cc0


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;
#
# void main()
# {
#   vec2 uv;
#   bool c1 = uv.y < 0.25;
#
#   for (int i = 0; i < 1; i++)
#   {
#     _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); // Writes the color red
#     return;
#   }
#   if (c1)
#   {
#     return;
#   }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 49
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %34
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "c1"
               OpName %12 "uv"
               OpName %22 "i"
               OpName %34 "_GLF_color"
               OpDecorate %22 RelaxedPrecision
               OpDecorate %34 Location 0
               OpDecorate %39 RelaxedPrecision
               OpDecorate %40 RelaxedPrecision
               OpDecorate %45 RelaxedPrecision
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeBool
          %7 = OpTypePointer Function %6
          %9 = OpTypeFloat 32
         %10 = OpTypeVector %9 2
         %11 = OpTypePointer Function %10
         %13 = OpTypeInt 32 0
         %14 = OpConstant %13 1
         %15 = OpTypePointer Function %9
         %18 = OpConstant %9 0.25
         %20 = OpTypeInt 32 1
         %21 = OpTypePointer Function %20
         %23 = OpConstant %20 0
         %30 = OpConstant %20 1
         %32 = OpTypeVector %9 4
         %33 = OpTypePointer Output %32
         %34 = OpVariable %33 Output
         %35 = OpConstant %9 1
         %36 = OpConstant %9 0
         %37 = OpConstantComposite %32 %35 %36 %36 %35
         %47 = OpUndef %20
         %48 = OpUndef %6
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %12 = OpVariable %11 Function
         %22 = OpVariable %21 Function
         %16 = OpAccessChain %15 %12 %14
         %17 = OpLoad %9 %16
         %19 = OpFOrdLessThan %6 %17 %18
               OpStore %8 %19
               OpStore %22 %23
               OpBranch %24
         %24 = OpLabel
         %46 = OpPhi %6 %19 %5 %48 %27
         %45 = OpPhi %20 %23 %5 %47 %27
               OpLoopMerge %26 %27 None
               OpBranch %28
         %28 = OpLabel
         %31 = OpSLessThan %6 %45 %30
               OpBranchConditional %31 %25 %26
         %25 = OpLabel
               OpStore %34 %37
               OpReturn
         %27 = OpLabel
         %39 = OpLoad %20 %22
         %40 = OpIAdd %20 %39 %30
               OpStore %22 %40
               OpBranch %24
         %26 = OpLabel
               OpSelectionMerge %43 None
               OpBranchConditional %46 %42 %43
         %42 = OpLabel
               OpReturn
         %43 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant


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