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>
70 lines
2.3 KiB
JavaScript
70 lines
2.3 KiB
JavaScript
### Compilation failed:
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error: SPIR-V validation error: Operand 3 of TypeImage requires one of these capabilities: Sampled1D Image1D
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%11 = OpTypeImage %float 1D 0 0 0 1 Unknown
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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 %tex "tex"
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OpName %main "main"
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OpName %a "a"
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OpName %b "b"
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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 %tex RelaxedPrecision
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OpDecorate %tex Binding 0
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OpDecorate %tex DescriptorSet 0
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OpDecorate %20 RelaxedPrecision
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OpDecorate %24 RelaxedPrecision
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OpDecorate %28 RelaxedPrecision
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OpDecorate %29 RelaxedPrecision
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OpDecorate %31 RelaxedPrecision
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OpDecorate %32 RelaxedPrecision
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OpDecorate %33 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 1D 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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%tex = OpVariable %_ptr_UniformConstant_12 UniformConstant
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%void = OpTypeVoid
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%15 = OpTypeFunction %void
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%float_0 = OpConstant %float 0
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%v2float = OpTypeVector %float 2
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%26 = OpConstantComposite %v2float %float_0 %float_0
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%main = OpFunction %void None %15
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%16 = OpLabel
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%a = OpVariable %_ptr_Function_v4float Function
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%b = OpVariable %_ptr_Function_v4float Function
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%20 = OpLoad %12 %tex
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%19 = OpImageSampleImplicitLod %v4float %20 %float_0
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OpStore %a %19
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%24 = OpLoad %12 %tex
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%23 = OpImageSampleProjImplicitLod %v4float %24 %26
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OpStore %b %23
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%27 = OpVectorShuffle %v2float %19 %19 0 1
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%28 = OpCompositeExtract %float %27 0
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%29 = OpCompositeExtract %float %27 1
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%30 = OpVectorShuffle %v2float %23 %23 2 3
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%31 = OpCompositeExtract %float %30 0
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%32 = OpCompositeExtract %float %30 1
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%33 = OpCompositeConstruct %v4float %28 %29 %31 %32
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OpStore %sk_FragColor %33
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OpReturn
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OpFunctionEnd
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1 error
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