#!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 an always false if function

# The test passes because main always writes the color red. (Additionally the discard statement is never reached).

# Optimized using spirv-opt with the following arguments:
# '--eliminate-local-single-block'
# '--reduce-load-size'
# '--combine-access-chains'
# '--eliminate-local-multi-store'
# '--reduce-load-size'
# '--convert-local-access-chains'
# '--eliminate-dead-branches'
# '--eliminate-dead-branches'
# '--merge-return'
# '--copy-propagate-arrays'
# '--copy-propagate-arrays'
# '--eliminate-dead-inserts'
# '--merge-blocks'
# '--copy-propagate-arrays'
# '--combine-access-chains'
# '--simplify-instructions'
# '--convert-local-access-chains'
# spirv-opt commit hash: 4a00a80c40484a6f6f72f48c9d34943cf8f180d4


SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
#
# // END OF GENERATED HEADER
# precision highp float;
#
# layout(location = 0) out vec4 _GLF_color;
# layout(set = 0, binding = 0) uniform buf0
# {
#     vec2 injectionSwitch;
# };
#
# vec3 mand()
# {
#     for (
#         int k = 0;
#         k < 1000;
#         1)
#     {
#         discard;
#     }
#     return vec3(1.0);
# }
# void main()
# {
#     if (injectionSwitch.x > injectionSwitch.y)
#     {
#         for (
#             int j = 0;
#             j < 4;
#             1)
#         {
#             mand();
#         }
#     }
#
#     _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: 64
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %57
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %9 "mand("
               OpName %13 "k"
               OpName %31 "buf0"
               OpMemberName %31 0 "injectionSwitch"
               OpName %33 ""
               OpName %45 "j"
               OpName %57 "_GLF_color"
               OpDecorate %13 RelaxedPrecision
               OpMemberDecorate %31 0 Offset 0
               OpDecorate %31 Block
               OpDecorate %33 DescriptorSet 0
               OpDecorate %33 Binding 0
               OpDecorate %45 RelaxedPrecision
               OpDecorate %57 Location 0
               OpDecorate %14 RelaxedPrecision
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 3
          %8 = OpTypeFunction %7
         %11 = OpTypeInt 32 1
         %12 = OpTypePointer Function %11
         %14 = OpConstant %11 0
         %21 = OpConstant %11 1000
         %22 = OpTypeBool
         %25 = OpConstant %11 1
         %26 = OpConstant %6 1
         %27 = OpConstantComposite %7 %26 %26 %26
         %30 = OpTypeVector %6 2
         %31 = OpTypeStruct %30
         %32 = OpTypePointer Uniform %31
         %33 = OpVariable %32 Uniform
         %34 = OpTypeInt 32 0
         %35 = OpConstant %34 0
         %36 = OpTypePointer Uniform %6
         %39 = OpConstant %34 1
         %52 = OpConstant %11 4
         %55 = OpTypeVector %6 4
         %56 = OpTypePointer Output %55
         %57 = OpVariable %56 Output
         %58 = OpConstant %6 0
         %59 = OpConstantComposite %55 %26 %58 %58 %26
         %62 = OpUndef %11
         %63 = OpConstantTrue %22
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %45 = OpVariable %12 Function
         %37 = OpAccessChain %36 %33 %14 %35
         %38 = OpLoad %6 %37
         %40 = OpAccessChain %36 %33 %14 %39
         %41 = OpLoad %6 %40
         %42 = OpFOrdGreaterThan %22 %38 %41
               OpSelectionMerge %44 None
               OpBranchConditional %42 %43 %44
         %43 = OpLabel
               OpStore %45 %14
               OpBranch %46
         %46 = OpLabel
               OpLoopMerge %48 %47 None
               OpBranchConditional %63 %47 %48
         %47 = OpLabel
         %54 = OpFunctionCall %7 %9
               OpBranch %46
         %48 = OpLabel
               OpBranch %44
         %44 = OpLabel
               OpStore %57 %59
               OpReturn
               OpFunctionEnd
          %9 = OpFunction %7 None %8
         %10 = OpLabel
         %13 = OpVariable %12 Function
               OpStore %13 %14
               OpBranch %15
         %15 = OpLabel
               OpLoopMerge %17 %18 None
               OpBranchConditional %63 %16 %17
         %16 = OpLabel
               OpKill
         %18 = OpLabel
               OpBranch %15
         %17 = OpLabel
               OpReturnValue %27
               OpFunctionEnd
END

# uniforms for variant

# injectionSwitch
BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
 0.0 1.0
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
  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 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