#!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: Fragment shader that writes red despite unreachable loops

# The test passes because red is written, and the loops inside the if (one of
# which would be infinite) are dynamically unreachable due to the runtime content
# of 'injected'.

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;
#
# layout(set = 0, binding = 0) uniform buf0 {
#  vec2 injected;
# };
#
# void main()
# {
#  _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
#  if (injected.x > injected.y) {
#    do
#     {
#     }
#    while(false);
#    {
#     for(
#         int m = 1;
#         true;
#         1
#     )
#      {
#        _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
#      }
#    }
#  }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 45
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %9
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %9 "_GLF_color"
               OpName %14 "buf0"
               OpMemberName %14 0 "injected"
               OpName %16 ""
               OpName %37 "m"
               OpDecorate %9 Location 0
               OpMemberDecorate %14 0 Offset 0
               OpDecorate %14 Block
               OpDecorate %16 DescriptorSet 0
               OpDecorate %16 Binding 0
               OpDecorate %37 RelaxedPrecision
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 4
          %8 = OpTypePointer Output %7
          %9 = OpVariable %8 Output
         %10 = OpConstant %6 1
         %11 = OpConstant %6 0
         %12 = OpConstantComposite %7 %10 %11 %11 %10
         %13 = OpTypeVector %6 2
         %14 = OpTypeStruct %13
         %15 = OpTypePointer Uniform %14
         %16 = OpVariable %15 Uniform
         %17 = OpTypeInt 32 1
         %18 = OpConstant %17 0
         %19 = OpTypeInt 32 0
         %20 = OpConstant %19 0
         %21 = OpTypePointer Uniform %6
         %24 = OpConstant %19 1
         %27 = OpTypeBool
         %35 = OpConstantFalse %27
         %36 = OpTypePointer Function %17
         %38 = OpConstant %17 1
         %44 = OpConstantTrue %27
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %37 = OpVariable %36 Function
               OpStore %9 %12
         %22 = OpAccessChain %21 %16 %18 %20
         %23 = OpLoad %6 %22
         %25 = OpAccessChain %21 %16 %18 %24
         %26 = OpLoad %6 %25
         %28 = OpFOrdGreaterThan %27 %23 %26
               OpSelectionMerge %30 None
               OpBranchConditional %28 %29 %30
         %29 = OpLabel
               OpBranch %31
         %31 = OpLabel
               OpLoopMerge %33 %34 None
               OpBranch %32
         %32 = OpLabel
               OpBranch %34
         %34 = OpLabel
               OpBranchConditional %35 %31 %33
         %33 = OpLabel
               OpStore %37 %38
               OpBranch %39
         %39 = OpLabel
               OpLoopMerge %41 %42 None
               OpBranch %43
         %43 = OpLabel
               OpBranchConditional %44 %40 %41
         %40 = OpLabel
               OpStore %9 %12
               OpBranch %42
         %42 = OpLabel
               OpBranch %39
         %41 = OpLabel
               OpBranch %30
         %30 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# resolution
BUFFER variant_resolution DATA_TYPE vec2<float> DATA
 0.0 1.0
END

BUFFER framebuffer FORMAT B8G8R8A8_UNORM

PIPELINE graphics gfz_pipeline
  ATTACH variant_vertex_shader
  ATTACH variant_fragment_shader
  FRAMEBUFFER_SIZE 256 256
  BIND BUFFER framebuffer AS color LOCATION 0
  BIND BUFFER variant_resolution AS uniform DESCRIPTOR_SET 0 BINDING 0
END
CLEAR_COLOR gfz_pipeline 0 0 0 255

CLEAR gfz_pipeline
RUN gfz_pipeline DRAW_RECT POS 0 0 SIZE 256 256
EXPECT framebuffer IDX 0 0 SIZE 256 256 EQ_RGB 255 0 0