#!amber

# Copyright 2020 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 coverage-gap found by GraphicsFuzz.

# Short description: A fragment shader that covers a specific types optimization path.

# The test passes because shader always writes red.

# Optimized using spirv-opt with the following arguments:
# '--eliminate-dead-branches'
# '--merge-blocks'
# '--scalar-replacement=100'
# '--scalar-replacement=100'
# '--inline-entry-points-exhaustive'
# '--private-to-local'
# '--eliminate-local-single-block'
# '--eliminate-dead-branches'
# '--if-conversion'
# '--combine-access-chains'
# '--eliminate-dead-branches'
# '--redundancy-elimination'
# '--simplify-instructions'
# '--private-to-local'
# '--private-to-local'
# spirv-opt commit hash: 9215c1b7df0029f27807e8c8d7ec80532ce90a87


SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# precision highp float;
# precision highp int;
#
# layout(location = 0) out vec4 _GLF_color;
# layout(set = 0, binding = 0) uniform buf0
# {
#     int one;
# };
#
# vec4 func()
# {
#     return vec4(1, 0, 0, 1);
# }
#
# void main()
# {
#     _GLF_color = vec4(0);
#
#     if(one == 0) // Always false.
#         return;
#
#     _GLF_color = func();
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 35
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %17
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %9 "func("
               OpName %17 "_GLF_color"
               OpName %20 "buf0"
               OpMemberName %20 0 "one"
               OpName %22 ""
               OpDecorate %17 Location 0
               OpMemberDecorate %20 0 Offset 0
               OpDecorate %20 Block
               OpDecorate %22 DescriptorSet 0
               OpDecorate %22 Binding 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 4
          %8 = OpTypeFunction %7
         %11 = OpConstant %6 1
         %12 = OpConstant %6 0
         %13 = OpConstantComposite %7 %11 %12 %12 %11
         %16 = OpTypePointer Output %7
         %17 = OpVariable %16 Output
         %18 = OpConstantComposite %7 %12 %12 %12 %12
         %19 = OpTypeInt 32 1
         %20 = OpTypeStruct %19
         %21 = OpTypePointer Uniform %20
         %22 = OpVariable %21 Uniform
         %23 = OpConstant %19 0
         %24 = OpTypePointer Uniform %19
         %27 = OpTypeBool
         %33 = OpTypePointer Function %7
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %34 = OpVariable %33 Function
               OpStore %17 %18
         %25 = OpAccessChain %24 %22 %23
         %26 = OpLoad %19 %25
         %28 = OpIEqual %27 %26 %23
               OpSelectionMerge %30 None
               OpBranchConditional %28 %29 %30
         %29 = OpLabel
               OpReturn
         %30 = OpLabel
               OpStore %34 %13
               OpStore %17 %13
               OpReturn
               OpFunctionEnd
          %9 = OpFunction %7 None %8
         %10 = OpLabel
               OpReturnValue %13
               OpFunctionEnd
END

# uniforms for variant

# one
BUFFER variant_one DATA_TYPE int32 DATA
 1
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_one 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