#!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 the GraphicsFuzz project.

# Short description: Covers specific inst combine simplify demanded and inst combine shifts path

# The test passes because the shader always writes red.

# Optimized using spirv-opt with the following arguments:
# '-O'
# spirv-opt commit hash: a187dd58a0485988841d325a85c8e6063f53500a


SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# #define _int_1 _GLF_uniform_int_values[0]
# #define _int_0 _GLF_uniform_int_values[1]
# #define _float_0_0 _GLF_uniform_float_values[0]
# #define _float_256_0 _GLF_uniform_float_values[0]
#
# precision highp float;
# precision highp int;
#
# // Contents of _GLF_uniform_float_values: [0.0, 256.0]
# layout(set = 0, binding = 0) uniform buf0
# {
#     float _GLF_uniform_float_values[2];
# };
#
# // Contents of _GLF_uniform_int_values: [1, 0]
# layout(set = 0, binding = 1) uniform buf1
# {
#     int _GLF_uniform_int_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     vec2 v1 = vec2(_float_256_0);
#
#     // v1.y becomes undefined. This results in an undefined value, but not in undefined behavior.
#     v1[_int_1] = ldexp(v1.y, -256);
#
#     vec2 v2 = v1 * mat2(_float_0_0);
#
#     if (v2.x == _float_0_0)
#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
#     else
#         _GLF_color = vec4(_int_0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 78
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %58
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %9 "v1"
               OpName %13 "buf0"
               OpMemberName %13 0 "_GLF_uniform_float_values"
               OpName %15 ""
               OpName %23 "buf1"
               OpMemberName %23 0 "_GLF_uniform_int_values"
               OpName %25 ""
               OpName %58 "_GLF_color"
               OpDecorate %12 ArrayStride 16
               OpMemberDecorate %13 0 Offset 0
               OpDecorate %13 Block
               OpDecorate %15 DescriptorSet 0
               OpDecorate %15 Binding 0
               OpDecorate %22 ArrayStride 16
               OpMemberDecorate %23 0 Offset 0
               OpDecorate %23 Block
               OpDecorate %25 DescriptorSet 0
               OpDecorate %25 Binding 1
               OpDecorate %58 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 2
          %8 = OpTypePointer Function %7
         %10 = OpTypeInt 32 0
         %11 = OpConstant %10 2
         %12 = OpTypeArray %6 %11
         %13 = OpTypeStruct %12
         %14 = OpTypePointer Uniform %13
         %15 = OpVariable %14 Uniform
         %16 = OpTypeInt 32 1
         %17 = OpConstant %16 0
         %18 = OpTypePointer Uniform %6
         %22 = OpTypeArray %16 %11
         %23 = OpTypeStruct %22
         %24 = OpTypePointer Uniform %23
         %25 = OpVariable %24 Uniform
         %26 = OpTypePointer Uniform %16
         %29 = OpConstant %10 1
         %30 = OpTypePointer Function %6
         %33 = OpConstant %16 -256
         %40 = OpTypeMatrix %7 2
         %42 = OpConstant %6 0
         %52 = OpTypeBool
         %56 = OpTypeVector %6 4
         %57 = OpTypePointer Output %56
         %58 = OpVariable %57 Output
         %62 = OpConstant %16 1
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %9 = OpVariable %8 Function
         %19 = OpAccessChain %18 %15 %17 %17
         %20 = OpLoad %6 %19
         %21 = OpCompositeConstruct %7 %20 %20
               OpStore %9 %21
         %27 = OpAccessChain %26 %25 %17 %17
         %28 = OpLoad %16 %27
         %31 = OpAccessChain %30 %9 %29
         %32 = OpLoad %6 %31
         %34 = OpExtInst %6 %1 Ldexp %32 %33
         %35 = OpAccessChain %30 %9 %28
               OpStore %35 %34
         %37 = OpLoad %7 %9
         %43 = OpCompositeConstruct %7 %20 %42
         %44 = OpCompositeConstruct %7 %42 %20
         %45 = OpCompositeConstruct %40 %43 %44
         %46 = OpVectorTimesMatrix %7 %37 %45
         %49 = OpCompositeExtract %6 %46 0
         %53 = OpFOrdEqual %52 %49 %20
               OpSelectionMerge %55 None
               OpBranchConditional %53 %54 %73
         %54 = OpLabel
         %61 = OpConvertSToF %6 %28
         %63 = OpAccessChain %26 %25 %17 %62
         %64 = OpLoad %16 %63
         %65 = OpConvertSToF %6 %64
         %72 = OpCompositeConstruct %56 %61 %65 %65 %61
               OpStore %58 %72
               OpBranch %55
         %73 = OpLabel
         %74 = OpAccessChain %26 %25 %17 %62
         %75 = OpLoad %16 %74
         %76 = OpConvertSToF %6 %75
         %77 = OpCompositeConstruct %56 %76 %76 %76 %76
               OpStore %58 %77
               OpBranch %55
         %55 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 1 0
END
# _GLF_uniform_float_values
BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
 0.0 256.0
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__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 1
  BIND BUFFER variant__GLF_uniform_float_values 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