xref: /third_party/vk-gl-cts/external/vulkancts/data/vulkan/amber/graphicsfuzz/cov-min-intbitstofloat-undefined-never-used.amber

#!amber

# Copyright 2021 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: A fragment shader that covers specific LLVM code paths

# The test passes because the shader always writes red.

SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 320 es
# #define _int_0 _GLF_uniform_int_values[0]
# #define _int_1 _GLF_uniform_int_values[1]
# #define _float_0_0 _GLF_uniform_float_values[0]
#
# precision highp int;
# precision highp float;
#
# // Contents of _GLF_uniform_float_values: 0.0
# layout(set = 0, binding = 0) uniform buf0
# {
#     float _GLF_uniform_float_values[1];
# };
#
# // Contents of _GLF_uniform_int_values: [0, 1]
# layout(set = 0, binding = 1) uniform buf1
# {
#     int _GLF_uniform_int_values[2];
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     // -1 encodes a NaN, which makes the result of
#     // intBitsToFloat undefined.
#     float f = min(intBitsToFloat(-1), 1.0);
#
#     // Always true.
#     if(gl_FragCoord.x > _float_0_0)
#     {
#         _GLF_color = vec4(_int_1, _int_0, _int_0, _int_1);
#     }
#     else
#     {
#         // f is undefined, but this is never executed.
#         _GLF_color = vec4(f);
#     }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 60
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %16 %36
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "f"
               OpName %16 "gl_FragCoord"
               OpName %24 "buf0"
               OpMemberName %24 0 "_GLF_uniform_float_values"
               OpName %26 ""
               OpName %36 "_GLF_color"
               OpName %39 "buf1"
               OpMemberName %39 0 "_GLF_uniform_int_values"
               OpName %41 ""
               OpDecorate %16 BuiltIn FragCoord
               OpDecorate %23 ArrayStride 16
               OpMemberDecorate %24 0 Offset 0
               OpDecorate %24 Block
               OpDecorate %26 DescriptorSet 0
               OpDecorate %26 Binding 0
               OpDecorate %36 Location 0
               OpDecorate %38 ArrayStride 16
               OpMemberDecorate %39 0 Offset 0
               OpDecorate %39 Block
               OpDecorate %41 DescriptorSet 0
               OpDecorate %41 Binding 1
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypePointer Function %6
          %9 = OpTypeInt 32 1
         %10 = OpConstant %9 -1
         %12 = OpConstant %6 1
         %14 = OpTypeVector %6 4
         %15 = OpTypePointer Input %14
         %16 = OpVariable %15 Input
         %17 = OpTypeInt 32 0
         %18 = OpConstant %17 0
         %19 = OpTypePointer Input %6
         %22 = OpConstant %17 1
         %23 = OpTypeArray %6 %22
         %24 = OpTypeStruct %23
         %25 = OpTypePointer Uniform %24
         %26 = OpVariable %25 Uniform
         %27 = OpConstant %9 0
         %28 = OpTypePointer Uniform %6
         %31 = OpTypeBool
         %35 = OpTypePointer Output %14
         %36 = OpVariable %35 Output
         %37 = OpConstant %17 2
         %38 = OpTypeArray %9 %37
         %39 = OpTypeStruct %38
         %40 = OpTypePointer Uniform %39
         %41 = OpVariable %40 Uniform
         %42 = OpConstant %9 1
         %43 = OpTypePointer Uniform %9
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %11 = OpBitcast %6 %10
         %13 = OpExtInst %6 %1 FMin %11 %12
               OpStore %8 %13
         %20 = OpAccessChain %19 %16 %18
         %21 = OpLoad %6 %20
         %29 = OpAccessChain %28 %26 %27 %27
         %30 = OpLoad %6 %29
         %32 = OpFOrdGreaterThan %31 %21 %30
               OpSelectionMerge %34 None
               OpBranchConditional %32 %33 %57
         %33 = OpLabel
         %44 = OpAccessChain %43 %41 %27 %42
         %45 = OpLoad %9 %44
         %46 = OpConvertSToF %6 %45
         %47 = OpAccessChain %43 %41 %27 %27
         %48 = OpLoad %9 %47
         %49 = OpConvertSToF %6 %48
         %50 = OpAccessChain %43 %41 %27 %27
         %51 = OpLoad %9 %50
         %52 = OpConvertSToF %6 %51
         %53 = OpAccessChain %43 %41 %27 %42
         %54 = OpLoad %9 %53
         %55 = OpConvertSToF %6 %54
         %56 = OpCompositeConstruct %14 %46 %49 %52 %55
               OpStore %36 %56
               OpBranch %34
         %57 = OpLabel
         %58 = OpLoad %6 %8
         %59 = OpCompositeConstruct %14 %58 %58 %58 %58
               OpStore %36 %59
               OpBranch %34
         %34 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 0 1
END
# _GLF_uniform_float_values
BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
 0.0
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