JIT: fix recursive inline check #88749

AndyAyersMS · 2023-07-12T16:56:02Z

The existing check was too conservative, and blocked inlines of one instantation of a generic method into a different instantiation of the same method, or of two different methods that share the exact same IL stream.

Generalize the check to also compare the method handle and runtime context.

Fixes #88667
Fixes #58824

The existing check was too conservative, and blocked inlines of one instantation of a generic method into a different instantiation of the same method, or of two different methods that share the exact same IL stream. Generalize the check to also compare the method handle and runtime context. Fixes dotnet#88667 Fixes dotnet#58824

ghost · 2023-07-12T16:56:16Z

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

Issue Details

The existing check was too conservative, and blocked inlines of one instantation of a generic method into a different instantiation of the same method, or of two different methods that share the exact same IL stream.

Generalize the check to also compare the method handle and runtime context.

Fixes #88667
Fixes #58824

Author:	AndyAyersMS
Assignees:	-
Labels:	`area-CodeGen-coreclr`
Milestone:	-

AndyAyersMS · 2023-07-12T16:59:31Z

@EgorBo PTAL
cc @dotnet/jit-contrib

Per jit-diff, fairly minimal diffs overall. The WebCIL diffs are cases like we see in #88667.

PMI CodeSize Diffs for System.Private.CoreLib.dll, framework assemblies for x64 default jit

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 66985998
Total bytes of diff: 66989680
Total bytes of delta: 3682 (0.01 % of base)
Total relative delta: NaN
    diff is a regression.
    relative diff is a regression.


Top file regressions (bytes):
         778 : Microsoft.CodeAnalysis.CSharp.dasm (0.01% of base)
         736 : System.Collections.Immutable.dasm (0.04% of base)
         657 : System.Private.CoreLib.dasm (0.01% of base)
         562 : System.Data.Common.dasm (0.04% of base)
         534 : System.ComponentModel.Composition.dasm (0.15% of base)
         276 : Microsoft.CodeAnalysis.VisualBasic.dasm (0.00% of base)
         150 : Microsoft.CodeAnalysis.dasm (0.00% of base)
          92 : Microsoft.Diagnostics.Tracing.TraceEvent.dasm (0.00% of base)
          52 : System.IO.Packaging.dasm (0.06% of base)
          13 : System.Private.DataContractSerialization.dasm (0.00% of base)

Top file improvements (bytes):
        -166 : Microsoft.NET.WebAssembly.Webcil.dasm (-0.74% of base)
          -2 : System.Private.Xml.dasm (-0.00% of base)

12 total files with Code Size differences (2 improved, 10 regressed), 265 unchanged.

Top method regressions (bytes):
         562 (156.11% of base) : System.Data.Common.dasm - System.Data.RBTree`1[System.Numerics.Vector`1[float]]:IndexOf(int,System.Numerics.Vector`1[float]):int:this (FullOpts)
         267 (88.12% of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.Hosting.ImportEngine+EngineContext:GetAddedPartManagers():System.Collections.Generic.IEnumerable`1[System.ComponentModel.Composition.Hosting.ImportEngine+PartManager]:this (FullOpts)
         267 (88.12% of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.Hosting.ImportEngine+EngineContext:GetRemovedPartManagers():System.Collections.Generic.IEnumerable`1[System.ComponentModel.Composition.Hosting.ImportEngine+PartManager]:this (FullOpts)
         232 (79.73% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:Add(System.Numerics.Vector`1[float]):System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:this (FullOpts)
         212 (25.51% of base) : System.Private.CoreLib.dasm - System.DateTime:.ctor(int,int,int,int,int,int,int):this (FullOpts) (2 methods)
         206 (87.66% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:PopulateAll(Microsoft.CodeAnalysis.CSharp.NullableWalker):this (FullOpts)
         202 (57.22% of base) : System.Private.CoreLib.dasm - System.DateTime:.ctor(int,int,int,int,int,int):this (FullOpts)
         176 (56.96% of base) : Microsoft.CodeAnalysis.VisualBasic.dasm - Microsoft.CodeAnalysis.VisualBasic.SyntaxTreeDiagnosticEnumerator:Push(Microsoft.CodeAnalysis.GreenNode,bool):this (FullOpts)
         174 (37.10% of base) : System.Private.CoreLib.dasm - System.DateTime:Init(int,int,int,int,int,int,int,int):ulong (FullOpts)
         150 (72.46% of base) : Microsoft.CodeAnalysis.dasm - Microsoft.Cci.ITypeReferenceExtensions:GetConsolidatedTypeArguments(Microsoft.Cci.ITypeReference,Microsoft.CodeAnalysis.PooledObjects.ArrayBuilder`1[Microsoft.Cci.ITypeReference],Microsoft.CodeAnalysis.Emit.EmitContext) (FullOpts)
         148 (89.70% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:Normalize(Microsoft.CodeAnalysis.CSharp.NullableWalker,Microsoft.CodeAnalysis.CSharp.NullableWalker+Variables):this (FullOpts)
         137 (75.69% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:<Dump>g__getName|38_0(int,byref):System.String (FullOpts)
         105 (71.92% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:ForEach[System.Numerics.Vector`1[float]](System.Action`2[int,System.Numerics.Vector`1[float]],System.Numerics.Vector`1[float]):this (FullOpts)
         102 (60.00% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:Contains(System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]],System.Numerics.Vector`1[float],System.Collections.Generic.IEqualityComparer`1[System.Numerics.Vector`1[float]]):bool (FullOpts)
          92 (30.67% of base) : Microsoft.Diagnostics.Tracing.TraceEvent.dasm - Microsoft.Diagnostics.Tracing.StackSources.LinuxPerfScriptStackSource:InternFrames(System.Collections.Generic.IEnumerator`1[Microsoft.Diagnostics.Tracing.StackSources.Frame],int,int,System.Nullable`1[int],Microsoft.Diagnostics.Tracing.StackSources.BlockedTimeAnalyzer):int:this (FullOpts)
          69 (35.20% of base) : Microsoft.CodeAnalysis.VisualBasic.dasm - Microsoft.CodeAnalysis.VisualBasic.SyntaxTreeDiagnosticEnumerator:PushToken(Microsoft.CodeAnalysis.VisualBasic.Syntax.InternalSyntax.SyntaxToken,bool):this (FullOpts)
          68 (75.56% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:Join(byref):bool:this (FullOpts)
          68 (75.56% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:Meet(byref):bool:this (FullOpts)
          66 (53.66% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Nullable`1[int]]:Contains(System.Collections.Immutable.ImmutableList`1+Node[System.Nullable`1[int]],System.Nullable`1[int],System.Collections.Generic.IEqualityComparer`1[System.Nullable`1[int]]):bool (FullOpts)
          52 (66.67% of base) : System.IO.Packaging.dasm - System.IO.Packaging.XmlCompatibilityReader+CompatibilityScope:CanIgnore(System.String):bool:this (FullOpts)

Top method improvements (bytes):
         -48 (-15.79% of base) : Microsoft.NET.WebAssembly.Webcil.dasm - Microsoft.NET.WebAssembly.Webcil.WebcilConverter+PEFileInfo:Equals(Microsoft.NET.WebAssembly.Webcil.WebcilConverter+PEFileInfo):bool:this (FullOpts)
         -41 (-13.67% of base) : Microsoft.NET.WebAssembly.Webcil.dasm - Microsoft.NET.WebAssembly.Webcil.WebcilConverter+PEFileInfo:GetHashCode():int:this (FullOpts)
         -41 (-12.06% of base) : Microsoft.NET.WebAssembly.Webcil.dasm - Microsoft.NET.WebAssembly.Webcil.WebcilConverter+WCFileInfo:GetHashCode():int:this (FullOpts)
         -36 (-9.05% of base) : Microsoft.NET.WebAssembly.Webcil.dasm - Microsoft.NET.WebAssembly.Webcil.WebcilConverter+WCFileInfo:Equals(Microsoft.NET.WebAssembly.Webcil.WebcilConverter+WCFileInfo):bool:this (FullOpts)
         -22 (-15.28% of base) : System.Private.Xml.dasm - System.Xml.Serialization.SourceInfo:Equals(System.Object):bool:this (FullOpts)
          -1 (-0.10% of base) : System.Private.CoreLib.dasm - System.DateTime:.ctor(int,int,int,int,int,int,int,int):this (FullOpts) (2 methods)

Top method regressions (percentages):
         562 (156.11% of base) : System.Data.Common.dasm - System.Data.RBTree`1[System.Numerics.Vector`1[float]]:IndexOf(int,System.Numerics.Vector`1[float]):int:this (FullOpts)
         148 (89.70% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:Normalize(Microsoft.CodeAnalysis.CSharp.NullableWalker,Microsoft.CodeAnalysis.CSharp.NullableWalker+Variables):this (FullOpts)
         267 (88.12% of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.Hosting.ImportEngine+EngineContext:GetAddedPartManagers():System.Collections.Generic.IEnumerable`1[System.ComponentModel.Composition.Hosting.ImportEngine+PartManager]:this (FullOpts)
         267 (88.12% of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.Hosting.ImportEngine+EngineContext:GetRemovedPartManagers():System.Collections.Generic.IEnumerable`1[System.ComponentModel.Composition.Hosting.ImportEngine+PartManager]:this (FullOpts)
         206 (87.66% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:PopulateAll(Microsoft.CodeAnalysis.CSharp.NullableWalker):this (FullOpts)
         232 (79.73% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:Add(System.Numerics.Vector`1[float]):System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:this (FullOpts)
         137 (75.69% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:<Dump>g__getName|38_0(int,byref):System.String (FullOpts)
          68 (75.56% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:Join(byref):bool:this (FullOpts)
          68 (75.56% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:Meet(byref):bool:this (FullOpts)
         150 (72.46% of base) : Microsoft.CodeAnalysis.dasm - Microsoft.Cci.ITypeReferenceExtensions:GetConsolidatedTypeArguments(Microsoft.Cci.ITypeReference,Microsoft.CodeAnalysis.PooledObjects.ArrayBuilder`1[Microsoft.Cci.ITypeReference],Microsoft.CodeAnalysis.Emit.EmitContext) (FullOpts)
         105 (71.92% of base) : Microsoft.CodeAnalysis.CSharp.dasm - Microsoft.CodeAnalysis.CSharp.NullableWalker+LocalState:ForEach[System.Numerics.Vector`1[float]](System.Action`2[int,System.Numerics.Vector`1[float]],System.Numerics.Vector`1[float]):this (FullOpts)
          48 (69.57% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[double]:AddRange(System.ReadOnlySpan`1[double]):System.Collections.Immutable.ImmutableList`1+Node[double]:this (FullOpts)
          48 (69.57% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[int]:AddRange(System.ReadOnlySpan`1[int]):System.Collections.Immutable.ImmutableList`1+Node[int]:this (FullOpts)
          48 (69.57% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[long]:AddRange(System.ReadOnlySpan`1[long]):System.Collections.Immutable.ImmutableList`1+Node[long]:this (FullOpts)
          48 (69.57% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[short]:AddRange(System.ReadOnlySpan`1[short]):System.Collections.Immutable.ImmutableList`1+Node[short]:this (FullOpts)
          48 (69.57% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Nullable`1[int]]:AddRange(System.ReadOnlySpan`1[System.Nullable`1[int]]):System.Collections.Immutable.ImmutableList`1+Node[System.Nullable`1[int]]:this (FullOpts)
          48 (69.57% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:AddRange(System.ReadOnlySpan`1[System.Numerics.Vector`1[float]]):System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:this (FullOpts)
          48 (69.57% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[ubyte]:AddRange(System.ReadOnlySpan`1[ubyte]):System.Collections.Immutable.ImmutableList`1+Node[ubyte]:this (FullOpts)
          52 (66.67% of base) : System.IO.Packaging.dasm - System.IO.Packaging.XmlCompatibilityReader+CompatibilityScope:CanIgnore(System.String):bool:this (FullOpts)
         102 (60.00% of base) : System.Collections.Immutable.dasm - System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]]:Contains(System.Collections.Immutable.ImmutableList`1+Node[System.Numerics.Vector`1[float]],System.Numerics.Vector`1[float],System.Collections.Generic.IEqualityComparer`1[System.Numerics.Vector`1[float]]):bool (FullOpts)

Top method improvements (percentages):
         -48 (-15.79% of base) : Microsoft.NET.WebAssembly.Webcil.dasm - Microsoft.NET.WebAssembly.Webcil.WebcilConverter+PEFileInfo:Equals(Microsoft.NET.WebAssembly.Webcil.WebcilConverter+PEFileInfo):bool:this (FullOpts)
         -22 (-15.28% of base) : System.Private.Xml.dasm - System.Xml.Serialization.SourceInfo:Equals(System.Object):bool:this (FullOpts)
         -41 (-13.67% of base) : Microsoft.NET.WebAssembly.Webcil.dasm - Microsoft.NET.WebAssembly.Webcil.WebcilConverter+PEFileInfo:GetHashCode():int:this (FullOpts)
         -41 (-12.06% of base) : Microsoft.NET.WebAssembly.Webcil.dasm - Microsoft.NET.WebAssembly.Webcil.WebcilConverter+WCFileInfo:GetHashCode():int:this (FullOpts)
         -36 (-9.05% of base) : Microsoft.NET.WebAssembly.Webcil.dasm - Microsoft.NET.WebAssembly.Webcil.WebcilConverter+WCFileInfo:Equals(Microsoft.NET.WebAssembly.Webcil.WebcilConverter+WCFileInfo):bool:this (FullOpts)
          -1 (-0.10% of base) : System.Private.CoreLib.dasm - System.DateTime:.ctor(int,int,int,int,int,int,int,int):this (FullOpts) (2 methods)

40 total methods with Code Size differences (6 improved, 34 regressed), 416702 unchanged.

Per BenchmarkDotNet, this fixes the perf regressions from #88667.

Method	Job	Toolchain	Mean	Error	StdDev	Median	Min	Max	Ratio	Allocated	Alloc Ratio
ValueTupleCompareNoOpt	Job-PSRQUH	DIFF	3.7414 ns	0.0201 ns	0.0157 ns	3.7377 ns	3.7206 ns	3.7643 ns	0.73	-	NA
ValueTupleCompareNoOpt	Job-KLRQLL	BASE	5.1556 ns	0.0547 ns	0.0512 ns	5.1451 ns	5.0433 ns	5.2335 ns	1.00	-	NA

ValueTupleCompare	Job-PSRQUH	DIFF	0.6834 ns	0.0147 ns	0.0130 ns	0.6862 ns	0.6633 ns	0.7081 ns	0.25	-	NA
ValueTupleCompare	Job-KLRQLL	BASE	2.6975 ns	0.0315 ns	0.0295 ns	2.6993 ns	2.6589 ns	2.7505 ns	1.00	-	NA

ValueTupleCompareCached	Job-PSRQUH	DIFF	1.3210 ns	0.0209 ns	0.0195 ns	1.3252 ns	1.2910 ns	1.3630 ns	0.41	-	NA
ValueTupleCompareCached	Job-KLRQLL	BASE	3.2162 ns	0.0441 ns	0.0413 ns	3.2205 ns	3.1239 ns	3.2672 ns	1.00	-	NA

ValueTupleCompareWrapped	Job-PSRQUH	DIFF	0.5306 ns	0.0196 ns	0.0183 ns	0.5265 ns	0.4972 ns	0.5694 ns	0.21	-	NA
ValueTupleCompareWrapped	Job-KLRQLL	BASE	2.5522 ns	0.0260 ns	0.0244 ns	2.5587 ns	2.5150 ns	2.5940 ns	1.00	-	NA

EgorBo · 2023-07-12T17:04:22Z

@MihuBot

AndyAyersMS · 2023-07-12T18:55:43Z

I don't yet understand if / how the two x64 failures (file-check) are related -- those tests seemingly won't do any inlining.

The x86 failure is similar to #88579. It also showed up in #88527

AndyAyersMS · 2023-07-12T19:02:11Z

I don't yet understand if / how the two x64 failures (file-check) are related -- those tests seemingly won't do any inlining.

Suspect is is fallout from #88692

AndyAyersMS · 2023-07-12T20:25:19Z

Opened issues for the failures, not sure if/when build analysis will update to show this.

AndyAyersMS · 2023-07-12T21:48:04Z

Errors are known.

EgorBo · 2023-07-18T16:35:45Z

Improvements:

[Perf] Windows/x64: 10 Improvements on 7/12/2023 9:48:15 PM perf-autofiling-issues#19913
[Perf] Linux/x64: 9 Improvements on 7/13/2023 3:06:28 AM perf-autofiling-issues#19875
[Perf] Windows/x64: 9 Improvements on 7/12/2023 9:48:15 PM perf-autofiling-issues#19881
[Perf] Windows/x64: 4 Improvements on 7/12/2023 7:15:00 AM perf-autofiling-issues#19912

With PGO and (via dotnet#88749) one level of recursive inlining enabled, the jit sees the recursive call made by `IntroSort` as an attractive inline candidate, but it isn't. Fixes dotnet#89106.

With PGO and (via #88749) one level of recursive inlining enabled, the jit sees the recursive call made by `IntroSort` as an attractive inline candidate, but it isn't. Fixes #89106.

…ecursive methods The inliner heuristics do not take into account that inlining methods causes type/method loading of the generic context. After dotnet#88749 this can quickly cause significant resources to be consumed as part of inlining when polymorphic recursion is involved (the blow-up can be exponential, as we see in the failing test under jitstress). This PR adds another safe-guard to the recursive inlining check in terms of a complexity limit on the generic context of the inline candidate. Fix dotnet#90144

…ecursive methods (#90306) The inliner heuristics do not take into account that inlining methods causes type/method loading of the generic context. After #88749 this can quickly cause significant resources to be consumed as part of inlining when polymorphic recursion is involved (the blow-up can be exponential, as we see in the failing test under jitstress). This PR adds another safe-guard to the recursive inlining check in terms of a complexity limit on the generic context of the inline candidate. Fix #90144

dotnet-issue-labeler bot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 12, 2023

ghost assigned AndyAyersMS Jul 12, 2023

AndyAyersMS requested a review from EgorBo July 12, 2023 17:00

MihuBot mentioned this pull request Jul 12, 2023

[AndyAyersMS] [X64] JIT: fix recursive inline check MihuBot/runtime-utils#125

Open

EgorBo approved these changes Jul 12, 2023

View reviewed changes

This was referenced Jul 12, 2023

File check failures in x64 jit tests #88783

Closed

Timeout in Microsoft.Gen.OptionsValidation.Unit.Test.EmitterTest #88784

Closed

AndyAyersMS merged commit ead96d6 into dotnet:main Jul 12, 2023
119 of 125 checks passed

build-analysis bot mentioned this pull request Jul 13, 2023

[7.0] IJW support in newer version of CMake breaks the build on empty TargetFramework #88806

Closed

jkotas mentioned this pull request Jul 13, 2023

Simplify condition to detect recursive inlining #88849

Merged

EgorBo mentioned this pull request Jul 18, 2023

[Perf] Windows/x64: 1 Regressions in System.Collections.Sort<IntStruct> #89106

Closed

This was referenced Jul 20, 2023

[Perf] Windows/arm64: 5 Improvements on 7/13/2023 7:10:54 AM dotnet/perf-autofiling-issues#19970

Closed

[Perf] Linux/arm64: 5 Improvements on 7/13/2023 7:10:54 AM dotnet/perf-autofiling-issues#19961

Closed

AndyAyersMS mentioned this pull request Jul 21, 2023

Block inlining of IntroSort #89310

Merged

jakobbotsch mentioned this pull request Aug 8, 2023

JIT: Deep inlining of polymorphic recursion can cause hangs during JIT #90144

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jakobbotsch mentioned this pull request Aug 10, 2023

JIT: Prevent generic context runaway during inlining of polymorphic recursive methods #90306

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AndyAyersMS mentioned this pull request Aug 15, 2023

Jit: reconsider policy for recursive inlines #41542

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JIT: fix recursive inline check #88749

JIT: fix recursive inline check #88749

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JIT: fix recursive inline check #88749

JIT: fix recursive inline check #88749

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