345d72124d
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>
52 lines
1.7 KiB
JavaScript
52 lines
1.7 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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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 %16 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 %24 RelaxedPrecision
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OpDecorate %26 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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%float_1 = OpConstant %float 1
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%main = OpFunction %void None %14
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%15 = OpLabel
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%16 = OpLoad %v4float %dst
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%17 = OpCompositeExtract %float %16 3
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%18 = OpLoad %v4float %src
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%19 = OpVectorTimesScalar %v4float %18 %17
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%21 = OpLoad %v4float %src
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%22 = OpCompositeExtract %float %21 3
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%23 = OpFSub %float %float_1 %22
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%24 = OpLoad %v4float %dst
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%25 = OpVectorTimesScalar %v4float %24 %23
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%26 = OpFAdd %v4float %19 %25
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OpStore %sk_FragColor %26
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OpReturn
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OpFunctionEnd
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