9e94812bef
This reverts commit 345d72124d.
Reason for revert: can break ES2 for-loop rules
Original change's description:
> Eliminate inliner temporary variables for functions with a single exit.
>
> When we determine that a function only contains a single return
> statement, there is no need to create a temporary variable and store the
> result expression into a variable. Instead, we can directly replace the
> function-call expression with the return-statement's expression.
>
> This dramatically simplifies the final optimized output from chains of
> very simple inlined functions, which is a very common pattern for trees
> of Skia fragment processors.
>
> Change-Id: I6789064a321daf43db2e1cef4915f25ed74d6131
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/344665
> Commit-Queue: John Stiles <johnstiles@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>
> Auto-Submit: John Stiles <johnstiles@google.com>
TBR=brianosman@google.com,ethannicholas@google.com,johnstiles@google.com
Change-Id: I60845f22159605a06047b030e2686a769121a35a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/345120
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
89 lines
3.0 KiB
JavaScript
89 lines
3.0 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 %main "main" %sk_FragColor %sk_Clockwise %src %dst
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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 %src "src"
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OpName %dst "dst"
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OpName %main "main"
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OpName %_0_blend_difference "_0_blend_difference"
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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 RelaxedPrecision
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OpDecorate %sk_Clockwise BuiltIn FrontFacing
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OpDecorate %src RelaxedPrecision
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OpDecorate %dst RelaxedPrecision
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OpDecorate %18 RelaxedPrecision
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OpDecorate %21 RelaxedPrecision
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OpDecorate %23 RelaxedPrecision
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OpDecorate %26 RelaxedPrecision
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OpDecorate %28 RelaxedPrecision
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OpDecorate %31 RelaxedPrecision
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OpDecorate %33 RelaxedPrecision
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OpDecorate %37 RelaxedPrecision
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OpDecorate %41 RelaxedPrecision
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OpDecorate %44 RelaxedPrecision
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OpDecorate %46 RelaxedPrecision
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OpDecorate %47 RelaxedPrecision
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OpDecorate %49 RelaxedPrecision
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OpDecorate %50 RelaxedPrecision
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OpDecorate %52 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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%_ptr_Input_v4float = OpTypePointer Input %v4float
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%src = OpVariable %_ptr_Input_v4float Input
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%dst = OpVariable %_ptr_Input_v4float Input
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%void = OpTypeVoid
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%14 = OpTypeFunction %void
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%v3float = OpTypeVector %float 3
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%float_2 = OpConstant %float 2
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%float_1 = OpConstant %float 1
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%main = OpFunction %void None %14
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%15 = OpLabel
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%_0_blend_difference = OpVariable %_ptr_Function_v4float Function
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%18 = OpLoad %v4float %src
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%19 = OpVectorShuffle %v3float %18 %18 0 1 2
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%21 = OpLoad %v4float %dst
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%22 = OpVectorShuffle %v3float %21 %21 0 1 2
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%23 = OpFAdd %v3float %19 %22
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%26 = OpLoad %v4float %src
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%27 = OpVectorShuffle %v3float %26 %26 0 1 2
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%28 = OpLoad %v4float %dst
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%29 = OpCompositeExtract %float %28 3
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%30 = OpVectorTimesScalar %v3float %27 %29
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%31 = OpLoad %v4float %dst
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%32 = OpVectorShuffle %v3float %31 %31 0 1 2
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%33 = OpLoad %v4float %src
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%34 = OpCompositeExtract %float %33 3
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%35 = OpVectorTimesScalar %v3float %32 %34
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%25 = OpExtInst %v3float %1 FMin %30 %35
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%36 = OpVectorTimesScalar %v3float %25 %float_2
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%37 = OpFSub %v3float %23 %36
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%38 = OpCompositeExtract %float %37 0
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%39 = OpCompositeExtract %float %37 1
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%40 = OpCompositeExtract %float %37 2
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%41 = OpLoad %v4float %src
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%42 = OpCompositeExtract %float %41 3
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%44 = OpLoad %v4float %src
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%45 = OpCompositeExtract %float %44 3
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%46 = OpFSub %float %float_1 %45
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%47 = OpLoad %v4float %dst
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%48 = OpCompositeExtract %float %47 3
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%49 = OpFMul %float %46 %48
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%50 = OpFAdd %float %42 %49
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%51 = OpCompositeConstruct %v4float %38 %39 %40 %50
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OpStore %_0_blend_difference %51
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%52 = OpLoad %v4float %_0_blend_difference
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OpStore %sk_FragColor %52
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OpReturn
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OpFunctionEnd
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