blob: 9846ecb434c24880a6194582e6b6e58b7a250f1a [file] [log] [blame]
#!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 instruction simplification code path
# 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 310 es
# precision highp float;
#
# layout(location = 0) out vec4 _GLF_color;
# layout(set = 0, binding = 0) uniform buf0
# {
# float zero;
# };
#
# void main()
# {
# float f = gl_FragCoord.x;
#
# // (1.0 / 0.0) -> Inf.
# // (Inf * 0.0) -> Nan.
# // So: f += Nan.
# f += (1.0 / 0.0) * 0.0;
#
# // Doesn't matter if this is executed or not.
# if (5.0 / f == 0.0)
# f += 1.0;
#
# if (isnan(f) || f != zero)
# f = 0.0;
#
# // Always true.
# if (f == 0.0)
# _GLF_color = vec4(1, 0, 0, 1);
# else
# _GLF_color = vec4(0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 58
; Schema: 0
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %11 %54
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %8 "f"
OpName %11 "gl_FragCoord"
OpName %37 "buf0"
OpMemberName %37 0 "zero"
OpName %39 ""
OpName %54 "_GLF_color"
OpDecorate %11 BuiltIn FragCoord
OpMemberDecorate %37 0 Offset 0
OpDecorate %37 Block
OpDecorate %39 DescriptorSet 0
OpDecorate %39 Binding 0
OpDecorate %54 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%6 = OpTypeFloat 32
%7 = OpTypePointer Function %6
%9 = OpTypeVector %6 4
%10 = OpTypePointer Input %9
%11 = OpVariable %10 Input
%12 = OpTypeInt 32 0
%13 = OpConstant %12 0
%14 = OpTypePointer Input %6
%17 = OpConstant %6 -0x1.8p+128
%20 = OpConstant %6 5
%23 = OpConstant %6 0
%24 = OpTypeBool
%28 = OpConstant %6 1
%37 = OpTypeStruct %6
%38 = OpTypePointer Uniform %37
%39 = OpVariable %38 Uniform
%40 = OpTypeInt 32 1
%41 = OpConstant %40 0
%42 = OpTypePointer Uniform %6
%53 = OpTypePointer Output %9
%54 = OpVariable %53 Output
%55 = OpConstantComposite %9 %28 %23 %23 %28
%57 = OpConstantComposite %9 %23 %23 %23 %23
%4 = OpFunction %2 None %3
%5 = OpLabel
%8 = OpVariable %7 Function
%15 = OpAccessChain %14 %11 %13
%16 = OpLoad %6 %15
OpStore %8 %16
%18 = OpLoad %6 %8
%19 = OpFAdd %6 %18 %17
OpStore %8 %19
%21 = OpLoad %6 %8
%22 = OpFDiv %6 %20 %21
%25 = OpFOrdEqual %24 %22 %23
OpSelectionMerge %27 None
OpBranchConditional %25 %26 %27
%26 = OpLabel
%29 = OpLoad %6 %8
%30 = OpFAdd %6 %29 %28
OpStore %8 %30
OpBranch %27
%27 = OpLabel
%31 = OpLoad %6 %8
%32 = OpIsNan %24 %31
%33 = OpLogicalNot %24 %32
OpSelectionMerge %35 None
OpBranchConditional %33 %34 %35
%34 = OpLabel
%36 = OpLoad %6 %8
%43 = OpAccessChain %42 %39 %41
%44 = OpLoad %6 %43
%45 = OpFOrdNotEqual %24 %36 %44
OpBranch %35
%35 = OpLabel
%46 = OpPhi %24 %32 %27 %45 %34
OpSelectionMerge %48 None
OpBranchConditional %46 %47 %48
%47 = OpLabel
OpStore %8 %23
OpBranch %48
%48 = OpLabel
%49 = OpLoad %6 %8
%50 = OpFOrdEqual %24 %49 %23
OpSelectionMerge %52 None
OpBranchConditional %50 %51 %56
%51 = OpLabel
OpStore %54 %55
OpBranch %52
%56 = OpLabel
OpStore %54 %57
OpBranch %52
%52 = OpLabel
OpReturn
OpFunctionEnd
END
# uniforms for variant
# zero
BUFFER variant_zero DATA_TYPE float 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_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