#!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; reduced by spirv-fuzz and by hand.
# A fragment shader with two nested loops. All loop conditions are false.
# We check that all pixels are red. The test passes because the final statement
# writes red to _GLF_color.

SHADER vertex variant_vertex_shader PASSTHROUGH

SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos SPIR-V Tools Assembler; 0
; Bound: 22
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %2 "main" %3
               OpExecutionMode %2 OriginUpperLeft
               OpSource ESSL 310
               OpName %2 "main"
               OpName %3 "_GLF_color"
               OpDecorate %3 Location 0
          %4 = OpTypeVoid
          %5 = OpTypeFunction %4
          %6 = OpTypeFloat 32
          %7 = OpConstant %6 1
          %8 = OpConstant %6 0
          %9 = OpTypeVector %6 4
         %10 = OpConstantComposite %9 %7 %8 %8 %7
         %11 = OpTypePointer Output %9
          %3 = OpVariable %11 Output
         %12 = OpTypeBool
         %13 = OpConstantTrue %12
         %14 = OpConstantFalse %12
          %2 = OpFunction %4 None %5
         %15 = OpLabel
               OpBranch %16
         %16 = OpLabel
               OpLoopMerge %17 %18 None
               OpBranchConditional %14 %19 %17
         %19 = OpLabel
               OpLoopMerge %20 %21 None
               OpBranchConditional %14 %20 %20
         %21 = OpLabel
               OpBranch %19
         %20 = OpLabel
               OpBranch %18
         %18 = OpLabel
               OpBranch %16
         %17 = OpLabel
               OpStore %3 %10
               OpReturn
               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