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>
121 lines
4.1 KiB
JavaScript
121 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 %_entrypoint_v "_entrypoint" %sk_FragColor %sk_Clockwise
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OpExecutionMode %_entrypoint_v OriginUpperLeft
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OpName %sk_FragColor "sk_FragColor"
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OpName %sk_Clockwise "sk_Clockwise"
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OpName %_UniformBuffer "_UniformBuffer"
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OpMemberName %_UniformBuffer 0 "colorGreen"
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OpMemberName %_UniformBuffer 1 "colorRed"
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OpMemberName %_UniformBuffer 2 "testInputs"
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OpName %_entrypoint_v "_entrypoint_v"
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OpName %main "main"
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OpName %xy "xy"
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OpName %zw "zw"
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OpName %tolerance "tolerance"
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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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OpMemberDecorate %_UniformBuffer 0 Offset 0
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OpMemberDecorate %_UniformBuffer 0 RelaxedPrecision
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OpMemberDecorate %_UniformBuffer 1 Offset 16
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OpMemberDecorate %_UniformBuffer 1 RelaxedPrecision
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OpMemberDecorate %_UniformBuffer 2 Offset 32
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OpDecorate %_UniformBuffer Block
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OpDecorate %10 Binding 0
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OpDecorate %10 DescriptorSet 0
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OpDecorate %68 RelaxedPrecision
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OpDecorate %71 RelaxedPrecision
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OpDecorate %72 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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%_UniformBuffer = OpTypeStruct %v4float %v4float %v4float
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%_ptr_Uniform__UniformBuffer = OpTypePointer Uniform %_UniformBuffer
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%10 = OpVariable %_ptr_Uniform__UniformBuffer Uniform
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%void = OpTypeVoid
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%15 = OpTypeFunction %void
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%float_0 = OpConstant %float 0
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%v2float = OpTypeVector %float 2
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%19 = OpConstantComposite %v2float %float_0 %float_0
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%_ptr_Function_v2float = OpTypePointer Function %v2float
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%23 = OpTypeFunction %v4float %_ptr_Function_v2float
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%uint = OpTypeInt 32 0
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%_ptr_Function_uint = OpTypePointer Function %uint
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%_ptr_Uniform_v4float = OpTypePointer Uniform %v4float
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%int = OpTypeInt 32 1
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%int_2 = OpConstant %int 2
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%float_0_015625 = OpConstant %float 0.015625
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%43 = OpConstantComposite %v2float %float_0_015625 %float_0_015625
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%false = OpConstantFalse %bool
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%v2bool = OpTypeVector %bool 2
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%float_0_75 = OpConstant %float 0.75
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%float_1 = OpConstant %float 1
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%58 = OpConstantComposite %v2float %float_0_75 %float_1
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%int_0 = OpConstant %int 0
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%int_1 = OpConstant %int 1
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%_entrypoint_v = OpFunction %void None %15
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%16 = OpLabel
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%20 = OpVariable %_ptr_Function_v2float Function
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OpStore %20 %19
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%22 = OpFunctionCall %v4float %main %20
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OpStore %sk_FragColor %22
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OpReturn
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OpFunctionEnd
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%main = OpFunction %v4float None %23
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%24 = OpFunctionParameter %_ptr_Function_v2float
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%25 = OpLabel
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%xy = OpVariable %_ptr_Function_uint Function
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%zw = OpVariable %_ptr_Function_uint Function
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%tolerance = OpVariable %_ptr_Function_v2float Function
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%61 = OpVariable %_ptr_Function_v4float Function
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%30 = OpAccessChain %_ptr_Uniform_v4float %10 %int_2
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%34 = OpLoad %v4float %30
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%35 = OpVectorShuffle %v2float %34 %34 0 1
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%29 = OpExtInst %uint %1 PackUnorm2x16 %35
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OpStore %xy %29
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%38 = OpAccessChain %_ptr_Uniform_v4float %10 %int_2
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%39 = OpLoad %v4float %38
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%40 = OpVectorShuffle %v2float %39 %39 2 3
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%37 = OpExtInst %uint %1 PackUnorm2x16 %40
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OpStore %zw %37
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OpStore %tolerance %43
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%48 = OpExtInst %v2float %1 UnpackUnorm2x16 %29
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%47 = OpExtInst %v2float %1 FAbs %48
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%46 = OpFOrdLessThan %v2bool %47 %43
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%45 = OpAll %bool %46
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OpSelectionMerge %51 None
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OpBranchConditional %45 %50 %51
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%50 = OpLabel
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%55 = OpExtInst %v2float %1 UnpackUnorm2x16 %37
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%59 = OpFSub %v2float %55 %58
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%54 = OpExtInst %v2float %1 FAbs %59
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%53 = OpFOrdLessThan %v2bool %54 %43
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%52 = OpAll %bool %53
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OpBranch %51
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%51 = OpLabel
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%60 = OpPhi %bool %false %25 %52 %50
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OpSelectionMerge %65 None
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OpBranchConditional %60 %63 %64
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%63 = OpLabel
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%66 = OpAccessChain %_ptr_Uniform_v4float %10 %int_0
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%68 = OpLoad %v4float %66
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OpStore %61 %68
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OpBranch %65
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%64 = OpLabel
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%69 = OpAccessChain %_ptr_Uniform_v4float %10 %int_1
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%71 = OpLoad %v4float %69
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OpStore %61 %71
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OpBranch %65
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%65 = OpLabel
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%72 = OpLoad %v4float %61
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OpReturnValue %72
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OpFunctionEnd
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