ffc9dec755
We now have two functions `writeOpLoad` and `writeOpStore` which are in charge of writing SpvOpLoad and SpvOpStore instructions. `writeOpStore` also keeps track of pointer stores in a "store cache." Subsequent loads from that same pointer will be found in the cache and will return the value stored in that pointer instead. Such a cache definitely cannot work in the face of control flow, so we make the following concessions: - `pruneReachableOps` is now `pruneConditionalOps`. Any pointers that are altered inside a potentially-unreachable block are cleared from the cache entirely. - The entire store cache is cleared at all OpLabels within a loop. The cache also cannot work in the presence of swizzled stores, so we make another significant concession: - The entire store cache is cleared whenever we store into a non-memory pointer (e.g., assigning into a swizzled LValue, such as `foo.xz`). Despite these significant limitations, this manages to dramatically shrink many real-world examples. Change-Id: I0981a0cf7b45b064e153e9ada271494c8e00cad5 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/530054 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: John Stiles <johnstiles@google.com> Auto-Submit: John Stiles <johnstiles@google.com>
113 lines
4.1 KiB
JavaScript
113 lines
4.1 KiB
JavaScript
OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main" %sk_FragColor %sk_Clockwise
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OpExecutionMode %main OriginUpperLeft
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OpName %sk_FragColor "sk_FragColor"
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OpName %sk_Clockwise "sk_Clockwise"
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OpName %s "s"
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OpName %_UniformBuffer "_UniformBuffer"
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OpMemberName %_UniformBuffer 0 "colorXform"
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OpName %main "main"
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OpName %tmpColor "tmpColor"
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OpDecorate %sk_FragColor RelaxedPrecision
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OpDecorate %sk_FragColor Location 0
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OpDecorate %sk_FragColor Index 0
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OpDecorate %sk_Clockwise BuiltIn FrontFacing
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OpDecorate %s RelaxedPrecision
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OpDecorate %s Binding 0
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OpDecorate %s DescriptorSet 0
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OpMemberDecorate %_UniformBuffer 0 Offset 0
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OpMemberDecorate %_UniformBuffer 0 ColMajor
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OpMemberDecorate %_UniformBuffer 0 MatrixStride 16
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OpDecorate %_UniformBuffer Block
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OpDecorate %14 Binding 0
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OpDecorate %14 DescriptorSet 0
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OpDecorate %24 RelaxedPrecision
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%float = OpTypeFloat 32
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%v4float = OpTypeVector %float 4
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%_ptr_Output_v4float = OpTypePointer Output %v4float
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%sk_FragColor = OpVariable %_ptr_Output_v4float Output
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%bool = OpTypeBool
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%_ptr_Input_bool = OpTypePointer Input %bool
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%sk_Clockwise = OpVariable %_ptr_Input_bool Input
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%11 = OpTypeImage %float 2D 0 0 0 1 Unknown
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%12 = OpTypeSampledImage %11
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%_ptr_UniformConstant_12 = OpTypePointer UniformConstant %12
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%s = OpVariable %_ptr_UniformConstant_12 UniformConstant
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%mat4v4float = OpTypeMatrix %v4float 4
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%_UniformBuffer = OpTypeStruct %mat4v4float
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%_ptr_Uniform__UniformBuffer = OpTypePointer Uniform %_UniformBuffer
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%14 = OpVariable %_ptr_Uniform__UniformBuffer Uniform
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%void = OpTypeVoid
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%19 = OpTypeFunction %void
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%float_1 = OpConstant %float 1
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%v2float = OpTypeVector %float 2
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%27 = OpConstantComposite %v2float %float_1 %float_1
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%_ptr_Uniform_mat4v4float = OpTypePointer Uniform %mat4v4float
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%int = OpTypeInt 32 1
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%int_0 = OpConstant %int 0
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%float_0 = OpConstant %float 0
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%34 = OpConstantComposite %v4float %float_1 %float_0 %float_0 %float_0
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%35 = OpConstantComposite %v4float %float_0 %float_1 %float_0 %float_0
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%36 = OpConstantComposite %v4float %float_0 %float_0 %float_1 %float_0
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%37 = OpConstantComposite %v4float %float_0 %float_0 %float_0 %float_1
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%38 = OpConstantComposite %mat4v4float %34 %35 %36 %37
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%v4bool = OpTypeVector %bool 4
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%v3float = OpTypeVector %float 3
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%70 = OpConstantComposite %v3float %float_0 %float_0 %float_0
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%main = OpFunction %void None %19
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%20 = OpLabel
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%tmpColor = OpVariable %_ptr_Function_v4float Function
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%55 = OpVariable %_ptr_Function_v4float Function
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%24 = OpLoad %12 %s
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%23 = OpImageSampleImplicitLod %v4float %24 %27
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OpStore %tmpColor %23
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%28 = OpAccessChain %_ptr_Uniform_mat4v4float %14 %int_0
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%32 = OpLoad %mat4v4float %28
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%40 = OpCompositeExtract %v4float %32 0
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%41 = OpFUnordNotEqual %v4bool %40 %34
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%42 = OpAny %bool %41
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%43 = OpCompositeExtract %v4float %32 1
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%44 = OpFUnordNotEqual %v4bool %43 %35
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%45 = OpAny %bool %44
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%46 = OpLogicalOr %bool %42 %45
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%47 = OpCompositeExtract %v4float %32 2
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%48 = OpFUnordNotEqual %v4bool %47 %36
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%49 = OpAny %bool %48
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%50 = OpLogicalOr %bool %46 %49
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%51 = OpCompositeExtract %v4float %32 3
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%52 = OpFUnordNotEqual %v4bool %51 %37
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%53 = OpAny %bool %52
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%54 = OpLogicalOr %bool %50 %53
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OpSelectionMerge %58 None
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OpBranchConditional %54 %56 %57
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%56 = OpLabel
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%60 = OpAccessChain %_ptr_Uniform_mat4v4float %14 %int_0
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%61 = OpLoad %mat4v4float %60
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%62 = OpVectorShuffle %v3float %23 %23 0 1 2
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%64 = OpCompositeExtract %float %62 0
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%65 = OpCompositeExtract %float %62 1
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%66 = OpCompositeExtract %float %62 2
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%67 = OpCompositeConstruct %v4float %64 %65 %66 %float_1
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%68 = OpMatrixTimesVector %v4float %61 %67
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%69 = OpVectorShuffle %v3float %68 %68 0 1 2
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%71 = OpCompositeExtract %float %23 3
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%72 = OpCompositeConstruct %v3float %71 %71 %71
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%59 = OpExtInst %v3float %1 FClamp %69 %70 %72
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%73 = OpCompositeExtract %float %59 0
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%74 = OpCompositeExtract %float %59 1
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%75 = OpCompositeExtract %float %59 2
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%76 = OpCompositeConstruct %v4float %73 %74 %75 %71
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OpStore %55 %76
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OpBranch %58
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%57 = OpLabel
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OpStore %55 %23
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OpBranch %58
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%58 = OpLabel
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%77 = OpLoad %v4float %55
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OpStore %sk_FragColor %77
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OpReturn
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OpFunctionEnd
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