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>
145 lines
4.8 KiB
JavaScript
145 lines
4.8 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 "testInputs"
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OpMemberName %_UniformBuffer 1 "colorGreen"
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OpMemberName %_UniformBuffer 2 "colorRed"
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OpName %_entrypoint_v "_entrypoint_v"
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OpName %main "main"
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OpName %expectedA "expectedA"
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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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OpMemberDecorate %_UniformBuffer 2 RelaxedPrecision
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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 %32 RelaxedPrecision
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OpDecorate %37 RelaxedPrecision
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OpDecorate %38 RelaxedPrecision
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OpDecorate %42 RelaxedPrecision
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OpDecorate %44 RelaxedPrecision
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OpDecorate %45 RelaxedPrecision
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OpDecorate %53 RelaxedPrecision
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OpDecorate %55 RelaxedPrecision
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OpDecorate %56 RelaxedPrecision
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OpDecorate %65 RelaxedPrecision
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OpDecorate %67 RelaxedPrecision
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OpDecorate %78 RelaxedPrecision
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OpDecorate %81 RelaxedPrecision
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OpDecorate %82 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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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%float_n1 = OpConstant %float -1
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%float_2 = OpConstant %float 2
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%30 = OpConstantComposite %v4float %float_n1 %float_0 %float_0 %float_2
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%false = OpConstantFalse %bool
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%_ptr_Uniform_v4float = OpTypePointer Uniform %v4float
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%int = OpTypeInt 32 1
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%int_0 = OpConstant %int 0
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%46 = OpConstantComposite %v2float %float_n1 %float_0
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%v2bool = OpTypeVector %bool 2
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%v3float = OpTypeVector %float 3
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%58 = OpConstantComposite %v3float %float_n1 %float_0 %float_0
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%v3bool = OpTypeVector %bool 3
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%v4bool = OpTypeVector %bool 4
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%int_1 = OpConstant %int 1
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%int_2 = OpConstant %int 2
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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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%expectedA = OpVariable %_ptr_Function_v4float Function
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%72 = OpVariable %_ptr_Function_v4float Function
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OpStore %expectedA %30
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%33 = OpAccessChain %_ptr_Uniform_v4float %10 %int_0
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%37 = OpLoad %v4float %33
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%38 = OpCompositeExtract %float %37 0
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%32 = OpExtInst %float %1 Trunc %38
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%39 = OpFOrdEqual %bool %32 %float_n1
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OpSelectionMerge %41 None
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OpBranchConditional %39 %40 %41
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%40 = OpLabel
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%43 = OpAccessChain %_ptr_Uniform_v4float %10 %int_0
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%44 = OpLoad %v4float %43
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%45 = OpVectorShuffle %v2float %44 %44 0 1
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%42 = OpExtInst %v2float %1 Trunc %45
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%47 = OpFOrdEqual %v2bool %42 %46
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%49 = OpAll %bool %47
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OpBranch %41
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%41 = OpLabel
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%50 = OpPhi %bool %false %25 %49 %40
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OpSelectionMerge %52 None
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OpBranchConditional %50 %51 %52
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%51 = OpLabel
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%54 = OpAccessChain %_ptr_Uniform_v4float %10 %int_0
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%55 = OpLoad %v4float %54
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%56 = OpVectorShuffle %v3float %55 %55 0 1 2
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%53 = OpExtInst %v3float %1 Trunc %56
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%59 = OpFOrdEqual %v3bool %53 %58
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%61 = OpAll %bool %59
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OpBranch %52
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%52 = OpLabel
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%62 = OpPhi %bool %false %41 %61 %51
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OpSelectionMerge %64 None
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OpBranchConditional %62 %63 %64
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%63 = OpLabel
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%66 = OpAccessChain %_ptr_Uniform_v4float %10 %int_0
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%67 = OpLoad %v4float %66
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%65 = OpExtInst %v4float %1 Trunc %67
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%68 = OpFOrdEqual %v4bool %65 %30
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%70 = OpAll %bool %68
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OpBranch %64
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%64 = OpLabel
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%71 = OpPhi %bool %false %52 %70 %63
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OpSelectionMerge %75 None
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OpBranchConditional %71 %73 %74
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%73 = OpLabel
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%76 = OpAccessChain %_ptr_Uniform_v4float %10 %int_1
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%78 = OpLoad %v4float %76
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OpStore %72 %78
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OpBranch %75
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%74 = OpLabel
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%79 = OpAccessChain %_ptr_Uniform_v4float %10 %int_2
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%81 = OpLoad %v4float %79
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OpStore %72 %81
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OpBranch %75
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%75 = OpLabel
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%82 = OpLoad %v4float %72
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OpReturnValue %82
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OpFunctionEnd
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