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>
160 lines
5.3 KiB
JavaScript
160 lines
5.3 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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OpName %_entrypoint_v "_entrypoint_v"
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OpName %tricky_h2hhh2h "tricky_h2hhh2h"
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OpName %func_vh4 "func_vh4"
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OpName %t "t"
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OpName %main "main"
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OpName %result "result"
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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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OpDecorate %_UniformBuffer Block
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OpDecorate %12 Binding 0
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OpDecorate %12 DescriptorSet 0
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OpDecorate %32 RelaxedPrecision
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OpDecorate %33 RelaxedPrecision
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OpDecorate %34 RelaxedPrecision
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OpDecorate %35 RelaxedPrecision
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OpDecorate %36 RelaxedPrecision
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OpDecorate %37 RelaxedPrecision
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OpDecorate %38 RelaxedPrecision
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OpDecorate %t RelaxedPrecision
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OpDecorate %48 RelaxedPrecision
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OpDecorate %49 RelaxedPrecision
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OpDecorate %50 RelaxedPrecision
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OpDecorate %54 RelaxedPrecision
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OpDecorate %55 RelaxedPrecision
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OpDecorate %56 RelaxedPrecision
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OpDecorate %57 RelaxedPrecision
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OpDecorate %58 RelaxedPrecision
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OpDecorate %result RelaxedPrecision
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OpDecorate %65 RelaxedPrecision
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OpDecorate %67 RelaxedPrecision
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OpDecorate %80 RelaxedPrecision
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OpDecorate %83 RelaxedPrecision
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OpDecorate %84 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
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%_ptr_Uniform__UniformBuffer = OpTypePointer Uniform %_UniformBuffer
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%12 = OpVariable %_ptr_Uniform__UniformBuffer Uniform
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%void = OpTypeVoid
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%17 = OpTypeFunction %void
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%float_0 = OpConstant %float 0
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%v2float = OpTypeVector %float 2
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%21 = OpConstantComposite %v2float %float_0 %float_0
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%_ptr_Function_v2float = OpTypePointer Function %v2float
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%_ptr_Function_float = OpTypePointer Function %float
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%26 = OpTypeFunction %v2float %_ptr_Function_float %_ptr_Function_float %_ptr_Function_v2float %_ptr_Function_float
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%40 = OpTypeFunction %void %_ptr_Function_v4float
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%float_1 = OpConstant %float 1
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%float_2 = OpConstant %float 2
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%float_5 = OpConstant %float 5
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%59 = OpTypeFunction %v4float %_ptr_Function_v2float
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%float_3 = OpConstant %float 3
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%64 = OpConstantComposite %v4float %float_0 %float_1 %float_2 %float_3
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%68 = OpConstantComposite %v4float %float_2 %float_3 %float_0 %float_5
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%v4bool = OpTypeVector %bool 4
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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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%int_1 = OpConstant %int 1
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%_entrypoint_v = OpFunction %void None %17
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%18 = OpLabel
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%22 = OpVariable %_ptr_Function_v2float Function
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OpStore %22 %21
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%24 = OpFunctionCall %v4float %main %22
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OpStore %sk_FragColor %24
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OpReturn
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OpFunctionEnd
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%tricky_h2hhh2h = OpFunction %v2float None %26
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%27 = OpFunctionParameter %_ptr_Function_float
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%28 = OpFunctionParameter %_ptr_Function_float
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%29 = OpFunctionParameter %_ptr_Function_v2float
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%30 = OpFunctionParameter %_ptr_Function_float
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%31 = OpLabel
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%32 = OpLoad %v2float %29
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%33 = OpVectorShuffle %v2float %32 %32 1 0
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OpStore %29 %33
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%34 = OpLoad %float %27
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%35 = OpLoad %float %28
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%36 = OpFAdd %float %34 %35
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%37 = OpLoad %float %30
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%38 = OpCompositeConstruct %v2float %36 %37
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OpReturnValue %38
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OpFunctionEnd
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%func_vh4 = OpFunction %void None %40
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%41 = OpFunctionParameter %_ptr_Function_v4float
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%42 = OpLabel
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%t = OpVariable %_ptr_Function_v2float Function
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%45 = OpVariable %_ptr_Function_float Function
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%47 = OpVariable %_ptr_Function_float Function
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%50 = OpVariable %_ptr_Function_v2float Function
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%52 = OpVariable %_ptr_Function_float Function
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OpStore %45 %float_1
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OpStore %47 %float_2
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%48 = OpLoad %v4float %41
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%49 = OpVectorShuffle %v2float %48 %48 0 2
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OpStore %50 %49
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OpStore %52 %float_5
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%53 = OpFunctionCall %v2float %tricky_h2hhh2h %45 %47 %50 %52
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%54 = OpLoad %v2float %50
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%55 = OpLoad %v4float %41
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%56 = OpVectorShuffle %v4float %55 %54 4 1 5 3
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OpStore %41 %56
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OpStore %t %53
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%57 = OpLoad %v4float %41
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%58 = OpVectorShuffle %v4float %57 %53 0 4 2 5
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OpStore %41 %58
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OpReturn
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OpFunctionEnd
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%main = OpFunction %v4float None %59
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%60 = OpFunctionParameter %_ptr_Function_v2float
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%61 = OpLabel
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%result = OpVariable %_ptr_Function_v4float Function
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%65 = OpVariable %_ptr_Function_v4float Function
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%72 = OpVariable %_ptr_Function_v4float Function
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OpStore %result %64
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OpStore %65 %64
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%66 = OpFunctionCall %void %func_vh4 %65
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%67 = OpLoad %v4float %65
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OpStore %result %67
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%69 = OpFOrdEqual %v4bool %67 %68
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%71 = OpAll %bool %69
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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 %12 %int_0
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%80 = OpLoad %v4float %76
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OpStore %72 %80
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OpBranch %75
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%74 = OpLabel
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%81 = OpAccessChain %_ptr_Uniform_v4float %12 %int_1
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%83 = OpLoad %v4float %81
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OpStore %72 %83
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OpBranch %75
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%75 = OpLabel
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%84 = OpLoad %v4float %72
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OpReturnValue %84
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OpFunctionEnd
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