#!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 always false if in switch statement

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

# Optimized using spirv-opt with the following arguments:
# '--private-to-local'
# '--eliminate-local-multi-store'
# '--simplify-instructions'
# '--eliminate-dead-inserts'
# spirv-opt commit hash: 4a00a80c40484a6f6f72f48c9d34943cf8f180d4



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()
# {
#   switch (0)
#   {
#   case 0:
#     if (false)
#     {
#     }
#   }
#
#   _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 22
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %18
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %18 "_GLF_color"
               OpDecorate %18 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpConstant %6 0
         %10 = OpTypeBool
         %11 = OpConstantFalse %10
         %15 = OpTypeFloat 32
         %16 = OpTypeVector %15 4
         %17 = OpTypePointer Output %16
         %18 = OpVariable %17 Output
         %19 = OpConstant %15 1
         %20 = OpConstant %15 0
         %21 = OpConstantComposite %16 %19 %20 %20 %19
          %4 = OpFunction %2 None %3
          %5 = OpLabel
               OpSelectionMerge %9 None
               OpSwitch %7 %9 0 %8
          %8 = OpLabel
               OpSelectionMerge %13 None
               OpBranchConditional %11 %12 %13
         %12 = OpLabel
               OpBranch %13
         %13 = OpLabel
               OpBranch %9
          %9 = OpLabel
               OpStore %18 %21
               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