2020-12-09 21:19:37 +00:00
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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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2021-03-15 18:58:57 +00:00
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OpEntryPoint Fragment %main "main" %sk_FragColor %sk_Clockwise
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2020-12-09 21:19:37 +00:00
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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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2021-03-15 18:58:57 +00:00
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OpName %_UniformBuffer "_UniformBuffer"
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OpMemberName %_UniformBuffer 0 "a"
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2020-12-09 21:19:37 +00:00
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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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Revert "Refactored SPIR-V RelaxedPrecision handling"
This reverts commit 9e476b798f03930b6bc7fb6eacab574f197e172d.
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>
2021-03-15 21:24:32 +00:00
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OpDecorate %sk_Clockwise RelaxedPrecision
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2020-12-09 21:19:37 +00:00
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OpDecorate %sk_Clockwise BuiltIn FrontFacing
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2021-03-15 18:58:57 +00:00
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OpMemberDecorate %_UniformBuffer 0 Offset 0
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OpMemberDecorate %_UniformBuffer 0 RelaxedPrecision
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OpDecorate %_UniformBuffer Block
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OpDecorate %10 Binding 0
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OpDecorate %10 DescriptorSet 0
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OpDecorate %21 RelaxedPrecision
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2020-12-09 21:19:37 +00:00
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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 %float
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%_ptr_Uniform__UniformBuffer = OpTypePointer Uniform %_UniformBuffer
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%10 = OpVariable %_ptr_Uniform__UniformBuffer Uniform
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%void = OpTypeVoid
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%14 = OpTypeFunction %void
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%_ptr_Uniform_float = OpTypePointer Uniform %float
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2020-12-09 21:19:37 +00:00
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%int = OpTypeInt 32 1
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%int_0 = OpConstant %int 0
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%_ptr_Output_float = OpTypePointer Output %float
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%main = OpFunction %void None %14
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%15 = OpLabel
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%17 = OpAccessChain %_ptr_Uniform_float %10 %int_0
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%21 = OpLoad %float %17
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%16 = OpDPdx %float %21
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%22 = OpAccessChain %_ptr_Output_float %sk_FragColor %int_0
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OpStore %22 %16
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2020-12-09 21:19:37 +00:00
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OpReturn
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OpFunctionEnd
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