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
5.0 KiB
JavaScript
145 lines
5.0 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 "colorBlack"
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OpMemberName %_UniformBuffer 2 "colorGreen"
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OpMemberName %_UniformBuffer 3 "colorRed"
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OpName %_entrypoint_v "_entrypoint_v"
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OpName %main "main"
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OpName %_0_v "_0_v"
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OpName %_1_i "_1_i"
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OpName %_2_x "_2_x"
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OpName %_3_y "_3_y"
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OpName %_4_z "_4_z"
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OpName %_5_w "_5_w"
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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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OpMemberDecorate %_UniformBuffer 3 Offset 48
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OpMemberDecorate %_UniformBuffer 3 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 %_0_v RelaxedPrecision
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OpDecorate %32 RelaxedPrecision
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OpDecorate %38 RelaxedPrecision
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OpDecorate %39 RelaxedPrecision
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OpDecorate %41 RelaxedPrecision
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OpDecorate %43 RelaxedPrecision
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OpDecorate %45 RelaxedPrecision
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OpDecorate %_2_x RelaxedPrecision
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OpDecorate %_3_y RelaxedPrecision
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OpDecorate %_4_z RelaxedPrecision
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OpDecorate %_5_w RelaxedPrecision
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OpDecorate %61 RelaxedPrecision
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OpDecorate %73 RelaxedPrecision
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OpDecorate %76 RelaxedPrecision
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OpDecorate %77 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 %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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%_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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%v4int = OpTypeVector %int 4
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%_ptr_Function_v4int = OpTypePointer Function %v4int
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%int_1 = OpConstant %int 1
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%_ptr_Function_float = OpTypePointer Function %float
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%float_n1_25 = OpConstant %float -1.25
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%63 = OpConstantComposite %v4float %float_n1_25 %float_n1_25 %float_n1_25 %float_0
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%v4bool = OpTypeVector %bool 4
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%int_2 = OpConstant %int 2
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%int_3 = OpConstant %int 3
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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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%_0_v = OpVariable %_ptr_Function_v4float Function
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%_1_i = OpVariable %_ptr_Function_v4int Function
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%_2_x = OpVariable %_ptr_Function_float Function
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%_3_y = OpVariable %_ptr_Function_float Function
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%_4_z = OpVariable %_ptr_Function_float Function
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%_5_w = OpVariable %_ptr_Function_float Function
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%67 = OpVariable %_ptr_Function_v4float Function
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%28 = OpAccessChain %_ptr_Uniform_v4float %10 %int_0
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%32 = OpLoad %v4float %28
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OpStore %_0_v %32
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%36 = OpAccessChain %_ptr_Uniform_v4float %10 %int_1
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%38 = OpLoad %v4float %36
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%39 = OpCompositeExtract %float %38 0
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%40 = OpConvertFToS %int %39
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%41 = OpCompositeExtract %float %38 1
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%42 = OpConvertFToS %int %41
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%43 = OpCompositeExtract %float %38 2
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%44 = OpConvertFToS %int %43
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%45 = OpCompositeExtract %float %38 3
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%46 = OpConvertFToS %int %45
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%47 = OpCompositeConstruct %v4int %40 %42 %44 %46
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OpStore %_1_i %47
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%50 = OpCompositeExtract %int %47 0
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%51 = OpVectorExtractDynamic %float %32 %50
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OpStore %_2_x %51
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%53 = OpCompositeExtract %int %47 1
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%54 = OpVectorExtractDynamic %float %32 %53
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OpStore %_3_y %54
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%56 = OpCompositeExtract %int %47 2
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%57 = OpVectorExtractDynamic %float %32 %56
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OpStore %_4_z %57
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%59 = OpCompositeExtract %int %47 3
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%60 = OpVectorExtractDynamic %float %32 %59
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OpStore %_5_w %60
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%61 = OpCompositeConstruct %v4float %51 %54 %57 %60
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%64 = OpFOrdEqual %v4bool %61 %63
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%66 = OpAll %bool %64
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OpSelectionMerge %70 None
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OpBranchConditional %66 %68 %69
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%68 = OpLabel
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%71 = OpAccessChain %_ptr_Uniform_v4float %10 %int_2
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%73 = OpLoad %v4float %71
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OpStore %67 %73
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OpBranch %70
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%69 = OpLabel
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%74 = OpAccessChain %_ptr_Uniform_v4float %10 %int_3
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%76 = OpLoad %v4float %74
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OpStore %67 %76
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OpBranch %70
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%70 = OpLabel
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%77 = OpLoad %v4float %67
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OpReturnValue %77
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OpFunctionEnd
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