#!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 bug found by GraphicsFuzz.

# Short description: A fragment shader that uses a struct with an array of size one

# The test passes because the shader always writes red.

# Optimized using spirv-opt with the following arguments:
# '--wrap-opkill'
# '--eliminate-dead-branches'
# '--merge-return'
# '--inline-entry-points-exhaustive'
# '--eliminate-dead-functions'
# '--private-to-local'
# '--scalar-replacement=0'
# '--ssa-rewrite'
# '--ccp'
# '--loop-unroll'
# '--eliminate-dead-branches'
# '--simplify-instructions'
# '--scalar-replacement=0'
# '--eliminate-local-single-store'
# '--if-conversion'
# '--simplify-instructions'
# '--eliminate-dead-code-aggressive'
# '--eliminate-dead-branches'
# '--merge-blocks'
# spirv-opt commit hash: dd3d91691f1e1dc4c0f42818756cf5e165c8918c


SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# precision highp float;
#
# struct S
# {
#     int x[1];
# };
#
# layout(location = 0) out vec4 _GLF_color;
# layout(set = 0, binding = 0) uniform buf0
# {
#     int zero;
# };
#
# // Function returns 1 or 2.
# int func(S s, int a)
# {
#     _GLF_color = vec4(0);
#
#     if(s.x[0] == a)
#         return 1;
#
#     return 2;
# }
#
# void main()
# {
#     S s;
#     s.x[0] = zero;
#
#     int res = func(s, s.x[0]);
#
#     // Always true.
#     if (res == 1)
#         _GLF_color = vec4(1, 0, 0, 1);
#     else
#         _GLF_color = vec4(0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 90
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %21
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %21 "_GLF_color"
               OpName %38 "buf0"
               OpMemberName %38 0 "zero"
               OpName %40 ""
               OpDecorate %21 Location 0
               OpMemberDecorate %38 0 RelaxedPrecision
               OpMemberDecorate %38 0 Offset 0
               OpDecorate %38 Block
               OpDecorate %40 DescriptorSet 0
               OpDecorate %40 Binding 0
               OpDecorate %43 RelaxedPrecision
               OpDecorate %50 RelaxedPrecision
               OpDecorate %74 RelaxedPrecision
               OpDecorate %81 RelaxedPrecision
               OpDecorate %86 RelaxedPrecision
               OpDecorate %89 RelaxedPrecision
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypeInt 32 0
          %8 = OpConstant %7 1
          %9 = OpTypeArray %6 %8
         %12 = OpTypePointer Function %6
         %18 = OpTypeFloat 32
         %19 = OpTypeVector %18 4
         %20 = OpTypePointer Output %19
         %21 = OpVariable %20 Output
         %22 = OpConstant %18 0
         %23 = OpConstantComposite %19 %22 %22 %22 %22
         %24 = OpConstant %6 0
         %28 = OpTypeBool
         %32 = OpConstant %6 1
         %34 = OpConstant %6 2
         %38 = OpTypeStruct %6
         %39 = OpTypePointer Uniform %38
         %40 = OpVariable %39 Uniform
         %41 = OpTypePointer Uniform %6
         %56 = OpConstant %18 1
         %57 = OpConstantComposite %19 %56 %22 %22 %56
         %63 = OpConstant %7 0
         %80 = OpTypePointer Function %9
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %86 = OpVariable %80 Function
         %81 = OpVariable %80 Function
         %42 = OpAccessChain %41 %40 %24
         %43 = OpLoad %6 %42
         %82 = OpAccessChain %12 %81 %24
               OpStore %82 %43
         %83 = OpLoad %9 %81
               OpStore %86 %83
         %85 = OpAccessChain %12 %81 %24
         %50 = OpLoad %6 %85
               OpSelectionMerge %71 None
               OpSwitch %63 %72
         %72 = OpLabel
               OpStore %21 %23
         %88 = OpAccessChain %12 %86 %24
         %74 = OpLoad %6 %88
         %76 = OpIEqual %28 %74 %50
               OpSelectionMerge %77 None
               OpBranchConditional %76 %78 %77
         %78 = OpLabel
               OpBranch %71
         %77 = OpLabel
               OpBranch %71
         %71 = OpLabel
         %89 = OpPhi %6 %32 %78 %34 %77
         %53 = OpIEqual %28 %89 %32
               OpSelectionMerge %55 None
               OpBranchConditional %53 %54 %58
         %54 = OpLabel
               OpStore %21 %57
               OpBranch %55
         %58 = OpLabel
               OpStore %21 %23
               OpBranch %55
         %55 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# zero
BUFFER variant_zero DATA_TYPE int32 DATA
 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_zero 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