a9c187e5cc
This reverts commit 9e476b798f.
Reason for revert: Angry Vulkan bots
Original change's description:
> Refactored SPIR-V RelaxedPrecision handling
>
> The RelaxedPrecision decoration is now handled by nextId(), to make it
> easier to see all spots where a RelaxedPrecision decoration might be
> necessary. The goal of this initial refactor is not to actually fix the
> issues with RelaxedPrecision decorations, but rather to lay the
> groundwork for doing so in followup CLs.
>
> The initial intent of this change was to not affect the SPIR-V at all,
> saving modifications for followups, but there ended up being three kinds
> of changes to the output:
>
> 1. Doing things at nextId() time rather than later means some
> decorations move to an earlier spot in the output. This results in
> diffs, but should not cause any behavioral changes.
> 2. We were incorrectly tagging bools as RelaxedPrecision in some
> situations. By funneling things through fewer code paths, the refactor
> would have caused this to happen in even more situations, and the code
> responsible for the bug was being rewritten in this CL anyway, so it
> seemed worth just fixing the issue as part of this change.
> 3. Funneling things through fewer code paths ended up adding
> (correct) RelaxedPrecision modifiers to binary operations that had
> previously been missing them. It seemed better to just let it happen
> than to try to maintain bug-for-bug compatibility with the previous
> approach.
>
> Change-Id: Ia9654d6b5754e2c797e02226660cb618c9189b36
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/384318
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>
TBR=brianosman@google.com,ethannicholas@google.com,johnstiles@google.com
Change-Id: I9ada728e5fd5798bc1179640560c2e6045b7efd1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/385158
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
112 lines
3.1 KiB
JavaScript
112 lines
3.1 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 "_entrypoint" %sk_FragColor %sk_Clockwise
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OpExecutionMode %_entrypoint OriginUpperLeft
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OpName %sk_FragColor "sk_FragColor"
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OpName %sk_Clockwise "sk_Clockwise"
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OpName %_entrypoint "_entrypoint"
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OpName %main "main"
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OpName %x "x"
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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 %26 RelaxedPrecision
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OpDecorate %33 RelaxedPrecision
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OpDecorate %35 RelaxedPrecision
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OpDecorate %36 RelaxedPrecision
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OpDecorate %47 RelaxedPrecision
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OpDecorate %52 RelaxedPrecision
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OpDecorate %53 RelaxedPrecision
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OpDecorate %54 RelaxedPrecision
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OpDecorate %61 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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%void = OpTypeVoid
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%12 = OpTypeFunction %void
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%15 = OpTypeFunction %v4float
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%_ptr_Function_v4float = OpTypePointer Function %v4float
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%float_1 = OpConstant %float 1
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%20 = OpConstantComposite %v4float %float_1 %float_1 %float_1 %float_1
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%_ptr_Function_float = OpTypePointer Function %float
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%int = OpTypeInt 32 1
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%int_0 = OpConstant %int 0
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%float_0_25 = OpConstant %float 0.25
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%float_0 = OpConstant %float 0
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%int_2 = OpConstant %int 2
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%int_1 = OpConstant %int 1
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%_entrypoint = OpFunction %void None %12
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%13 = OpLabel
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%14 = OpFunctionCall %v4float %main
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OpStore %sk_FragColor %14
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OpReturn
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OpFunctionEnd
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%main = OpFunction %v4float None %15
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%16 = OpLabel
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%x = OpVariable %_ptr_Function_v4float Function
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OpStore %x %20
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OpBranch %21
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%21 = OpLabel
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OpLoopMerge %25 %24 None
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OpBranch %22
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%22 = OpLabel
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%26 = OpLoad %v4float %x
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%27 = OpCompositeExtract %float %26 3
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%28 = OpFOrdEqual %bool %27 %float_1
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OpBranchConditional %28 %23 %25
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%23 = OpLabel
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%29 = OpAccessChain %_ptr_Function_float %x %int_0
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%33 = OpLoad %float %29
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%35 = OpFSub %float %33 %float_0_25
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OpStore %29 %35
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%36 = OpLoad %v4float %x
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%37 = OpCompositeExtract %float %36 0
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%39 = OpFOrdLessThanEqual %bool %37 %float_0
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OpSelectionMerge %41 None
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OpBranchConditional %39 %40 %41
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%40 = OpLabel
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OpBranch %25
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%41 = OpLabel
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OpBranch %24
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%24 = OpLabel
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OpBranch %21
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%25 = OpLabel
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OpBranch %42
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%42 = OpLabel
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OpLoopMerge %46 %45 None
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OpBranch %43
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%43 = OpLabel
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%47 = OpLoad %v4float %x
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%48 = OpCompositeExtract %float %47 2
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%49 = OpFOrdGreaterThan %bool %48 %float_0
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OpBranchConditional %49 %44 %46
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%44 = OpLabel
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%50 = OpAccessChain %_ptr_Function_float %x %int_2
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%52 = OpLoad %float %50
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%53 = OpFSub %float %52 %float_0_25
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OpStore %50 %53
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%54 = OpLoad %v4float %x
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%55 = OpCompositeExtract %float %54 3
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%56 = OpFOrdEqual %bool %55 %float_1
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OpSelectionMerge %58 None
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OpBranchConditional %56 %57 %58
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%57 = OpLabel
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OpBranch %45
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%58 = OpLabel
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%59 = OpAccessChain %_ptr_Function_float %x %int_1
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OpStore %59 %float_0
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OpBranch %45
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%45 = OpLabel
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OpBranch %42
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%46 = OpLabel
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%61 = OpLoad %v4float %x
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OpReturnValue %61
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OpFunctionEnd
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