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#!amber
# Copyright 2019 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 with uninitialized element cast in loop
# The test passes because main always writes the color red.
# Optimized using spirv-opt with the following arguments:
# '--inline-entry-points-exhaustive'
# '--eliminate-local-single-block'
# '--ccp'
# '--eliminate-local-multi-store'
# '--inline-entry-points-exhaustive'
# '--combine-access-chains'
# '--combine-access-chains'
# '--reduce-load-size'
# '--copy-propagate-arrays'
# '--reduce-load-size'
# '--eliminate-local-multi-store'
# '--scalar-replacement=100'
# '--convert-local-access-chains'
# '--scalar-replacement=100'
# '--vector-dce'
# '--eliminate-dead-inserts'
# '--scalar-replacement=100'
# '--eliminate-dead-inserts'
# '--simplify-instructions'
# '--eliminate-dead-branches'
# '--merge-blocks'
# '--ccp'
# '--copy-propagate-arrays'
# '--combine-access-chains'
# '--eliminate-local-multi-store'
# spirv-opt commit hash: 06407250a169c6a03b3765e86619075af1a8c187
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 { vec2 injectionSwitch; };
#
# void main()
# {
# while(true)
# {
# while(false)
# break;
#
# float uninit[1];
# float(uninit[0]);
#
# if (injectionSwitch.x < injectionSwitch.y) // always true
# {
# _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
# return;
# }
# }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 56
; Schema: 0
OpCapability Shader
%1 = OpExtInstImport "GLSL.std.450"
OpMemoryModel Logical GLSL450
OpEntryPoint Fragment %4 "main" %46
OpExecutionMode %4 OriginUpperLeft
OpSource ESSL 310
OpName %4 "main"
OpName %32 "buf0"
OpMemberName %32 0 "injectionSwitch"
OpName %34 ""
OpName %46 "_GLF_color"
OpMemberDecorate %32 0 Offset 0
OpDecorate %32 Block
OpDecorate %34 DescriptorSet 0
OpDecorate %34 Binding 0
OpDecorate %46 Location 0
%2 = OpTypeVoid
%3 = OpTypeFunction %2
%11 = OpTypeBool
%12 = OpConstantTrue %11
%18 = OpConstantFalse %11
%20 = OpTypeFloat 32
%21 = OpTypeInt 32 0
%22 = OpConstant %21 1
%23 = OpTypeArray %20 %22
%24 = OpTypePointer Function %23
%26 = OpTypeInt 32 1
%27 = OpConstant %26 0
%28 = OpTypePointer Function %20
%31 = OpTypeVector %20 2
%32 = OpTypeStruct %31
%33 = OpTypePointer Uniform %32
%34 = OpVariable %33 Uniform
%35 = OpConstant %21 0
%36 = OpTypePointer Uniform %20
%44 = OpTypeVector %20 4
%45 = OpTypePointer Output %44
%46 = OpVariable %45 Output
%47 = OpConstant %20 1
%48 = OpConstant %20 0
%49 = OpConstantComposite %44 %47 %48 %48 %47
%54 = OpUndef %20
%4 = OpFunction %2 None %3
%5 = OpLabel
%51 = OpVariable %28 Function
OpBranch %6
%6 = OpLabel
%53 = OpPhi %20 %54 %5 %52 %43
OpLoopMerge %8 %43 None
OpBranch %13
%13 = OpLabel
%52 = OpPhi %20 %53 %6 %54 %16
%37 = OpAccessChain %36 %34 %27 %35
%38 = OpLoad %20 %37
%39 = OpAccessChain %36 %34 %27 %22
%40 = OpLoad %20 %39
%41 = OpFOrdLessThan %11 %38 %40
OpSelectionMerge %55 None
OpBranchConditional %41 %42 %43
%16 = OpLabel
OpBranch %13
%42 = OpLabel
OpStore %46 %49
OpReturn
%55 = OpLabel
OpBranch %43
%43 = OpLabel
OpBranch %6
%8 = OpLabel
OpUnreachable
OpFunctionEnd
END
# uniforms for variant
# injectionSwitch
BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
0.0 1.0
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_injectionSwitch 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