[JitDiff X64] [hez2010] Support devirtualization for virtual methods that re ...

[MihuBot]

Job completed in 24 minutes 59 seconds (remote runner delay: 1 minute 13 seconds).
dotnet/runtime#128702

Main commit: dotnet/runtime@e556d5a
PR commit: hez2010/runtime@d0b8e36

Diffs

Diffs

Found 96 files with textual diffs.

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 137694046
Total bytes of diff: 137695344
Total bytes of delta: 1298 (0.00 % of base)
Total relative delta: Infinity
    diff is a regression.
    relative diff is a regression.


Top file regressions (bytes):
        1871 : AWSSDK.Core.dasm (0.17 % of base)
          65 : SixLabors.ImageSharp.dasm (0.00 % of base)
          59 : Pipelines.Sockets.Unofficial.dasm (0.01 % of base)
          24 : StackExchange.Redis.dasm (0.00 % of base)
           8 : System.Private.CoreLib.dasm (0.00 % of base)

Top file improvements (bytes):
        -428 : Microsoft.Azure.Amqp.dasm (-0.08 % of base)
        -258 : System.Security.Cryptography.Pkcs.dasm (-0.06 % of base)
         -28 : nunit.framework.dasm (-0.00 % of base)
         -15 : System.Text.Json.dasm (-0.00 % of base)

9 total files with Code Size differences (4 improved, 5 regressed), 342 unchanged.

Top method regressions (bytes):
         298 (36.47 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.Auth.AWS4aSignerCRTWrapper:.ctor(bool):this (FullOpts)
         265 (35.91 % of base) : AWSSDK.Core.dasm - AWSSDK.Runtime.Internal.Util.ChecksumCRTWrapper:get_Instance():Amazon.Runtime.SharedInterfaces.Internal.IChecksumProvider (FullOpts)
         262 (97.04 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO (FullOpts)
         262 (97.04 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDC_V2Client(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2 (FullOpts)
         262 (97.04 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDCClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC (FullOpts)
         262 (97.04 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOLogoutClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO_Logout (FullOpts)
         260 (78.79 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SigninServiceClientHelpers:BuildSigninClient(Amazon.RegionEndpoint,System.String,System.Net.IWebProxy,System.String):Amazon.Runtime.SharedInterfaces.ICoreAmazonSignin (FullOpts)
          65 (80.25 % of base) : SixLabors.ImageSharp.dasm - SixLabors.ImageSharp.Formats.Webp.WebpDecoder:Decode(SixLabors.ImageSharp.Formats.DecoderOptions,System.IO.Stream,System.Threading.CancellationToken):SixLabors.ImageSharp.Image:this (FullOpts)
          59 (Infinity of base) : Pipelines.Sockets.Unofficial.dasm - Pipelines.Sockets.Unofficial.DedicatedThreadPoolPipeScheduler+<>c:<.cctor>b__41_0(System.Object):this (FullOpts)
          14 (4.65 % of base) : StackExchange.Redis.dasm - StackExchange.Redis.RedisSubscriber:IdentifyEndpointAsync(StackExchange.Redis.RedisChannel,int):System.Threading.Tasks.Task`1[System.Net.EndPoint]:this (FullOpts)
          10 (3.29 % of base) : StackExchange.Redis.dasm - StackExchange.Redis.RedisSubscriber:IdentifyEndpoint(StackExchange.Redis.RedisChannel,int):System.Net.EndPoint:this (FullOpts)
           8 (3.70 % of base) : System.Private.CoreLib.dasm - System.Numerics.TotalOrderIeee754Comparer`1[double]:<Compare>g__CompareSignificand|0_2(double,double):int (FullOpts)

Top method improvements (bytes):
        -216 (-15.72 % of base) : Microsoft.Azure.Amqp.dasm - Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:GetNonBodySectionsStream():System.IO.Stream:this (FullOpts)
        -212 (-29.90 % of base) : Microsoft.Azure.Amqp.dasm - Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(System.Xml.XmlWriter):long:this (FullOpts)
         -68 (-6.49 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+RSACmsSignature:SignCore(System.ReadOnlySpan`1[byte],System.Security.Cryptography.HashAlgorithmName,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,System.Security.Cryptography.RSASignaturePadding,byref):bool (FullOpts)
         -54 (-4.26 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+DSACmsSignature:Sign(System.ReadOnlySpan`1[byte],System.String,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,byref,byref,byref):bool:this (FullOpts)
         -49 (-7.40 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+MLDsaCmsSignature:Sign(System.ReadOnlySpan`1[byte],System.String,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,byref,byref,byref):bool:this (FullOpts)
         -49 (-7.40 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+SlhDsaCmsSignature:Sign(System.ReadOnlySpan`1[byte],System.String,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,byref,byref,byref):bool:this (FullOpts)
         -38 (-2.24 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+ECDsaCmsSignature:Sign(System.ReadOnlySpan`1[byte],System.String,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,byref,byref,byref):bool:this (FullOpts)
         -28 (-2.02 % of base) : nunit.framework.dasm - NUnit.Framework.Constraints.Comparers.DirectoriesComparer:Equal(System.Object,System.Object,byref,NUnit.Framework.Constraints.Comparers.ComparisonState,NUnit.Framework.Constraints.NUnitEqualityComparer):int (FullOpts)
         -15 (-1.70 % of base) : System.Text.Json.dasm - System.Text.Json.Nodes.JsonNode:ToString():System.String:this (FullOpts)

Top method regressions (percentages):
          59 (Infinity of base) : Pipelines.Sockets.Unofficial.dasm - Pipelines.Sockets.Unofficial.DedicatedThreadPoolPipeScheduler+<>c:<.cctor>b__41_0(System.Object):this (FullOpts)
         262 (97.04 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO (FullOpts)
         262 (97.04 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDC_V2Client(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2 (FullOpts)
         262 (97.04 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDCClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC (FullOpts)
         262 (97.04 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOLogoutClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO_Logout (FullOpts)
          65 (80.25 % of base) : SixLabors.ImageSharp.dasm - SixLabors.ImageSharp.Formats.Webp.WebpDecoder:Decode(SixLabors.ImageSharp.Formats.DecoderOptions,System.IO.Stream,System.Threading.CancellationToken):SixLabors.ImageSharp.Image:this (FullOpts)
         260 (78.79 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.SigninServiceClientHelpers:BuildSigninClient(Amazon.RegionEndpoint,System.String,System.Net.IWebProxy,System.String):Amazon.Runtime.SharedInterfaces.ICoreAmazonSignin (FullOpts)
         298 (36.47 % of base) : AWSSDK.Core.dasm - Amazon.Runtime.Internal.Auth.AWS4aSignerCRTWrapper:.ctor(bool):this (FullOpts)
         265 (35.91 % of base) : AWSSDK.Core.dasm - AWSSDK.Runtime.Internal.Util.ChecksumCRTWrapper:get_Instance():Amazon.Runtime.SharedInterfaces.Internal.IChecksumProvider (FullOpts)
          14 (4.65 % of base) : StackExchange.Redis.dasm - StackExchange.Redis.RedisSubscriber:IdentifyEndpointAsync(StackExchange.Redis.RedisChannel,int):System.Threading.Tasks.Task`1[System.Net.EndPoint]:this (FullOpts)
           8 (3.70 % of base) : System.Private.CoreLib.dasm - System.Numerics.TotalOrderIeee754Comparer`1[double]:<Compare>g__CompareSignificand|0_2(double,double):int (FullOpts)
          10 (3.29 % of base) : StackExchange.Redis.dasm - StackExchange.Redis.RedisSubscriber:IdentifyEndpoint(StackExchange.Redis.RedisChannel,int):System.Net.EndPoint:this (FullOpts)

Top method improvements (percentages):
        -212 (-29.90 % of base) : Microsoft.Azure.Amqp.dasm - Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(System.Xml.XmlWriter):long:this (FullOpts)
        -216 (-15.72 % of base) : Microsoft.Azure.Amqp.dasm - Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:GetNonBodySectionsStream():System.IO.Stream:this (FullOpts)
         -49 (-7.40 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+MLDsaCmsSignature:Sign(System.ReadOnlySpan`1[byte],System.String,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,byref,byref,byref):bool:this (FullOpts)
         -49 (-7.40 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+SlhDsaCmsSignature:Sign(System.ReadOnlySpan`1[byte],System.String,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,byref,byref,byref):bool:this (FullOpts)
         -68 (-6.49 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+RSACmsSignature:SignCore(System.ReadOnlySpan`1[byte],System.Security.Cryptography.HashAlgorithmName,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,System.Security.Cryptography.RSASignaturePadding,byref):bool (FullOpts)
         -54 (-4.26 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+DSACmsSignature:Sign(System.ReadOnlySpan`1[byte],System.String,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,byref,byref,byref):bool:this (FullOpts)
         -38 (-2.24 % of base) : System.Security.Cryptography.Pkcs.dasm - System.Security.Cryptography.Pkcs.CmsSignature+ECDsaCmsSignature:Sign(System.ReadOnlySpan`1[byte],System.String,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Object,bool,byref,byref,byref):bool:this (FullOpts)
         -28 (-2.02 % of base) : nunit.framework.dasm - NUnit.Framework.Constraints.Comparers.DirectoriesComparer:Equal(System.Object,System.Object,byref,NUnit.Framework.Constraints.Comparers.ComparisonState,NUnit.Framework.Constraints.NUnitEqualityComparer):int (FullOpts)
         -15 (-1.70 % of base) : System.Text.Json.dasm - System.Text.Json.Nodes.JsonNode:ToString():System.String:this (FullOpts)

21 total methods with Code Size differences (9 improved, 12 regressed), 760100 unchanged.

--------------------------------------------------------------------------------

Artifacts:

• PackageList.json (33 KB)
• diff-frameworks.txt (10 KB)
• LongDiffsRegressions.md (183 KB)
• ShortDiffsImprovements.md (48 KB)
• LongDiffsImprovements.md (287 KB)
• ShortDiffsRegressions.md (53 KB)
• jit-diffs-pr.7z (112 MB)
• jit-diffs-main.7z (118 MB)

[MihuBot]

Top method regressions

262 (97.04 % of base) - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO

 ; Assembly listing for method Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO (FullOpts)
 ; Emitting BLENDED_CODE for x64 + VEX + EVEX on Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
-; partially interruptible
+; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 7 single block inlinees; 0 inlinees without PGO data
+; 0 inlinees with PGO data; 13 single block inlinees; 7 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T03] (  4,  3.50)     ref  ->  rbx         class-hnd single-def <Amazon.RegionEndpoint>
-;  V01 arg1         [V01,T04] (  4,  3.50)     ref  ->  r15         class-hnd single-def <System.Net.IWebProxy>
-;  V02 loc0         [V02,T05] (  4,  3.50)     ref  ->  rax         class-hnd <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO>
+;  V00 arg0         [V00,T04] (  4,  4   )     ref  ->  [rbp-0x20]  class-hnd EH-live single-def <Amazon.RegionEndpoint>
+;  V01 arg1         [V01,T05] (  4,  4   )     ref  ->  [rbp-0x28]  class-hnd EH-live single-def <System.Net.IWebProxy>
+;  V02 loc0         [V02,T17] (  3,  3   )     ref  ->  rax         class-hnd <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO>
 ;  V03 OutArgs      [V03    ] (  1,  1   )  struct ( 8) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <UNNAMED>
-;  V04 tmp1         [V04,T00] (  4,  8   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.SSOClientContext>
-;  V05 tmp2         [V05,T02] (  3,  6   )     ref  ->  r13         class-hnd exact single-def "impAppendStmt" <Amazon.RuntimeDependencies.GlobalRuntimeDependencyRegistry>
-;  V06 tmp3         [V06,T01] (  4,  8   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.CreateInstanceContext>
+;  V04 tmp1         [V04,T02] (  4,  8   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.SSOClientContext>
+;  V05 tmp2         [V05,T06] (  4,  6   )     ref  ->  [rbp-0x30]  class-hnd exact EH-live spill-single-def "impAppendStmt" <Amazon.RuntimeDependencies.GlobalRuntimeDependencyRegistry>
+;  V06 tmp3         [V06,T03] (  4,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.CreateInstanceContext>
+;* V07 tmp4         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline return value spill temp" <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO>
+;* V08 tmp5         [V08    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "impAppendStmt" <System.Collections.Generic.IDictionary`2[System.String,Amazon.RuntimeDependencies.RuntimeDependencyFactory]>
+;  V09 tmp6         [V09    ] (  4,  4   )     ref  ->  [rbp-0x18]  do-not-enreg[X] must-init addr-exposed ld-addr-op class-hnd "Inline ldloca(s) first use temp" <Amazon.RuntimeDependencies.RuntimeDependencyFactory>
+;* V10 tmp7         [V10    ] (  0,  0   )     ref  ->  zero-ref    ld-addr-op class-hnd "Inline ldloca(s) first use temp" <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO>
+;  V11 tmp8         [V11,T11] (  4,  4   )     ref  ->  [rbp-0x38]  do-not-enreg[M] must-init class-hnd EH-live "Inline stloc first use temp" <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO>
+;  V12 tmp9         [V12,T07] (  3,  6   )     ref  ->  rax         class-hnd single-def "Inlining Arg" <System.Threading.ReaderWriterLockSlim>
+;* V13 tmp10        [V13    ] (  0,  0   )  struct ( 8) zero-ref    ld-addr-op "NewObj constructor temp" <System.Threading.ReaderWriterLockSlim+TimeoutTracker>
+;* V14 tmp11        [V14    ] (  0,  0   )     int  ->  zero-ref    ld-addr-op "Inlining Arg"
+;* V15 tmp12        [V15    ] (  0,  0   )     int  ->  zero-ref    single-def "Inline return value spill temp"
+;* V16 tmp13        [V16    ] (  0,  0   )  struct ( 8) zero-ref    "Inlining Arg" <System.Threading.ReaderWriterLockSlim+TimeoutTracker>
+;* V17 tmp14        [V17    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
+;  V18 tmp15        [V18,T08] (  3,  6   )     ref  ->  r15         class-hnd single-def "Inlining Arg" <System.Threading.ReaderWriterLockSlim>
+;* V19 tmp16        [V19    ] (  0,  0   )     int  ->  zero-ref    "Inline return value spill temp"
+;  V20 tmp17        [V20,T20] (  2,  2   )     int  ->  rdi         "Inline stloc first use temp"
+;* V21 tmp18        [V21    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Threading.ReaderWriterCount>
+;  V22 tmp19        [V22,T18] (  2,  2   )     ref  ->  rdi         class-hnd "Inline return value spill temp" <System.Threading.ReaderWriterCount>
+;  V23 tmp20        [V23,T00] (  7, 35   )     ref  ->  rdi         class-hnd "Inline stloc first use temp" <System.Threading.ReaderWriterCount>
+;* V24 tmp21        [V24    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.Threading.ReaderWriterCount>
+;* V25 tmp22        [V25    ] (  0,  0   )     int  ->  zero-ref    single-def "field V13._total (fldOffset=0x0)" P-INDEP
+;* V26 tmp23        [V26    ] (  0,  0   )     int  ->  zero-ref    single-def "field V13._start (fldOffset=0x4)" P-INDEP
+;* V27 tmp24        [V27    ] (  0,  0   )     int  ->  zero-ref    "field V16._total (fldOffset=0x0)" P-INDEP
+;* V28 tmp25        [V28    ] (  0,  0   )     int  ->  zero-ref    "field V16._start (fldOffset=0x4)" P-INDEP
+;  V29 tmp26        [V29,T13] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
+;  V30 tmp27        [V30,T14] (  2,  4   )     ref  ->  rbx         single-def "argument with side effect"
+;  V31 tmp28        [V31,T15] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
+;  V32 tmp29        [V32,T16] (  2,  4   )     ref  ->  rax         single-def "argument with side effect"
+;  V33 cse0         [V33,T01] (  2,  9   )    long  ->  rax         hoist "CSE #01: aggressive"
+;  V34 cse1         [V34,T19] (  3,  3   )     ref  ->  rbx         "CSE #02: moderate"
+;  V35 rat0         [V35,T12] (  3,  4   )   byref  ->  rax         "TLS field access"
+;  V36 rat1         [V36,T10] (  3,  6   )    long  ->  rax         "TLS access"
+;  V37 rat2         [V37,T09] (  3,  6   )   byref  ->  rax         "ThreadStaticBlockBase access"
 ;
-; Lcl frame size = 8
+; Lcl frame size = 48
 
 G_M13750_IG01:
        push     rbp
        push     r15
-       push     r14
-       push     r13
-       push     r12
        push     rbx
-       push     rax
-       lea      rbp, [rsp+0x30]
-       mov      rbx, rdi
-       mov      r15, rsi
-						;; size=22 bbWeight=1 PerfScore 8.00
+       sub      rsp, 48
+       lea      rbp, [rsp+0x40]
+       xor      eax, eax
+       mov      qword ptr [rbp-0x18], rax
+       mov      qword ptr [rbp-0x38], rax
+       mov      gword ptr [rbp-0x20], rdi
+       mov      gword ptr [rbp-0x28], rsi
+						;; size=31 bbWeight=1 PerfScore 8.00
 G_M13750_IG02:
        mov      rdi, 0xD1FFAB1E      ; Amazon.RuntimeDependencies.SSOClientContext
        call     CORINFO_HELP_NEWSFAST
-       mov      r14, rax
+       mov      rbx, rax
        mov      rdi, 0xD1FFAB1E      ; const ptr
-       mov      r13, gword ptr [rdi]
-       lea      rdi, bword ptr [r14+0x08]
-       mov      rsi, rbx
+       mov      rdi, gword ptr [rdi]
+       mov      gword ptr [rbp-0x30], rdi
+       lea      rdi, bword ptr [rbx+0x08]
+       mov      rsi, gword ptr [rbp-0x20]
        call     CORINFO_HELP_ASSIGN_REF
-       lea      rdi, bword ptr [r14+0x10]
-       mov      rsi, r15
+       lea      rdi, bword ptr [rbx+0x10]
+       mov      rsi, gword ptr [rbp-0x28]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rdi, 0xD1FFAB1E      ; Amazon.RuntimeDependencies.CreateInstanceContext
        call     CORINFO_HELP_NEWSFAST
-       mov      r12, rax
-       lea      rdi, bword ptr [r12+0x28]
-       mov      rsi, r14
-       call     CORINFO_HELP_ASSIGN_REF
-       mov      dword ptr [r12+0x48], 4
-       mov      rdi, r13
-       mov      rsi, 0xD1FFAB1E      ; Amazon.RuntimeDependencies.BaseRuntimeDependencyRegistry
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rdi, r13
-       mov      rcx, r12
-       mov      rsi, 0xD1FFAB1E      ; 'AWSSDK.SSO'
-       mov      rdx, 0xD1FFAB1E      ; 'Amazon.SSO.AmazonSSOClient'
-       call     rax
-       test     rax, rax
-       jne      SHORT G_M13750_IG04
-						;; size=163 bbWeight=1 PerfScore 20.75
-G_M13750_IG03:
-       mov      gword ptr [rsp], r15
+       mov      r15, rax
+       lea      rdi, bword ptr [r15+0x28]
        mov      rsi, rbx
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      dword ptr [r15+0x48], 4
+						;; size=99 bbWeight=1 PerfScore 14.00
+G_M13750_IG03:
+       mov      rdi, gword ptr [rbp-0x30]
+       mov      rax, gword ptr [rdi+0x08]
+       cmp      byte  ptr [rax], al
+       mov      esi, 0xD1FFAB1E
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.Threading.ReaderWriterLockSlim:TryEnterReadLockCore(System.Threading.ReaderWriterLockSlim+TimeoutTracker):bool:this
+       call     [rax]System.Threading.ReaderWriterLockSlim:TryEnterReadLockCore(System.Threading.ReaderWriterLockSlim+TimeoutTracker):bool:this
+       mov      rdi, gword ptr [rbp-0x30]
+       mov      rbx, gword ptr [rdi+0x10]
+       mov      rdi, 0xD1FFAB1E      ; 'AWSSDK.SSO'
+       mov      rsi, 0xD1FFAB1E      ; '_'
+       mov      rdx, 0xD1FFAB1E      ; 'Amazon.SSO.AmazonSSOClient'
+       mov      rax, 0xD1FFAB1E      ; code for System.String:Concat(System.String,System.String,System.String):System.String
+       call     [rax]System.String:Concat(System.String,System.String,System.String):System.String
+       mov      rsi, rax
+       mov      rdi, rbx
+       lea      rdx, [rbp-0x18]
+       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IDictionary`2[System.__Canon,System.__Canon]:TryGetValue(System.__Canon,byref):bool:this
+       call     [r11]System.Collections.Generic.IDictionary`2[System.__Canon,System.__Canon]:TryGetValue(System.__Canon,byref):bool:this
+       test     eax, eax
+       jne      SHORT G_M13750_IG04
+       xor      rsi, rsi
+       mov      gword ptr [rbp-0x38], rsi
+       jmp      SHORT G_M13750_IG05
+						;; size=115 bbWeight=1 PerfScore 24.50
+G_M13750_IG04:
+       mov      rdi, gword ptr [rbp-0x18]
+       mov      rsi, r15
+       mov      rdi, gword ptr [rdi+0x10]
+       mov      rax, gword ptr [rbp-0x18]
+       call     [rax+0x18]Amazon.RuntimeDependencies.RuntimeDependencyFactory:Invoke(Amazon.RuntimeDependencies.CreateInstanceContext):System.Object:this
+       mov      rsi, rax
+       mov      rdi, 0xD1FFAB1E      ; Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO
+       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_ISINSTANCEOFINTERFACE
+       call     [rax]CORINFO_HELP_ISINSTANCEOFINTERFACE
+       mov      gword ptr [rbp-0x38], rax
+						;; size=47 bbWeight=1 PerfScore 12.00
+G_M13750_IG05:
+       call     G_M13750_IG09
+       nop      
+						;; size=6 bbWeight=1 PerfScore 1.25
+G_M13750_IG06:
+       xor      rsi, rsi
+       mov      gword ptr [rbp-0x18], rsi
+       mov      rax, gword ptr [rbp-0x38]
+       cmp      gword ptr [rbp-0x38], 0
+       jne      SHORT G_M13750_IG07
+       mov      rsi, gword ptr [rbp-0x28]
+       mov      gword ptr [rsp], rsi
+       mov      rsi, gword ptr [rbp-0x20]
        mov      rdi, 0xD1FFAB1E      ; Amazon.Runtime.Internal.SSOServiceClientHelpers:CreateClient[Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO](Amazon.RegionEndpoint,System.String,System.String,System.String,System.String,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO
        mov      rdx, 0xD1FFAB1E      ; 'Amazon.SSO.AmazonSSOClient'
        mov      rcx, 0xD1FFAB1E      ; 'Amazon.SSO.AmazonSSOConfig'
        mov      r8, 0xD1FFAB1E      ; 'AWSSDK.SSO'
        mov      r9, 0xD1FFAB1E      ; 'RegisterSSOClient'
        mov      rax, 0xD1FFAB1E      ; code for Amazon.Runtime.Internal.SSOServiceClientHelpers:CreateClient[System.__Canon](Amazon.RegionEndpoint,System.String,System.String,System.String,System.String,System.Net.IWebProxy):System.__Canon
        call     [rax]Amazon.Runtime.Internal.SSOServiceClientHelpers:CreateClient[System.__Canon](Amazon.RegionEndpoint,System.String,System.String,System.String,System.String,System.Net.IWebProxy):System.__Canon
-						;; size=69 bbWeight=0.50 PerfScore 2.88
-G_M13750_IG04:
+						;; size=91 bbWeight=1 PerfScore 11.75
+G_M13750_IG07:
        nop      
 						;; size=1 bbWeight=1 PerfScore 0.25
-G_M13750_IG05:
-       add      rsp, 8
+G_M13750_IG08:
+       add      rsp, 48
        pop      rbx
-       pop      r12
-       pop      r13
-       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=15 bbWeight=1 PerfScore 4.25
+						;; size=9 bbWeight=1 PerfScore 2.75
+G_M13750_IG09:
+       push     rax
+						;; size=1 bbWeight=1 PerfScore 1.00
+G_M13750_IG10:
+       mov      rdi, gword ptr [rbp-0x30]
+       mov      rbx, gword ptr [rdi+0x08]
+       mov      r15, rbx
+       cmp      byte  ptr [r15], r15b
+       mov      rdi, 0xD1FFAB1E
+       mov      rax, 0xD1FFAB1E      ; function address
+       call     rax
+       cmp      dword ptr [rax], 9
+       jle      SHORT G_M13750_IG11
+       mov      rdi, gword ptr [rax+0x08]
+       mov      rax, bword ptr [rdi+0x48]
+       test     rax, rax
+       jne      SHORT G_M13750_IG12
+						;; size=54 bbWeight=1 PerfScore 17.00
+G_M13750_IG11:
+       mov      edi, 9
+       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_GETDYNAMIC_GCTHREADSTATIC_BASE_NOCTOR_OPTIMIZED
+       call     [rax]CORINFO_HELP_GETDYNAMIC_GCTHREADSTATIC_BASE_NOCTOR_OPTIMIZED
+       jmp      SHORT G_M13750_IG12
+       align    [0 bytes for IG13]
+						;; size=19 bbWeight=0 PerfScore 0.00
+G_M13750_IG12:
+       mov      rdi, gword ptr [rax+0x10]
+       test     rdi, rdi
+       je       SHORT G_M13750_IG15
+       mov      rax, qword ptr [r15+0x28]
+						;; size=13 bbWeight=1 PerfScore 5.25
+G_M13750_IG13:
+       cmp      qword ptr [rdi+0x10], rax
+       je       SHORT G_M13750_IG14
+       mov      rdi, gword ptr [rdi+0x08]
+       test     rdi, rdi
+       jne      SHORT G_M13750_IG13
+       jmp      SHORT G_M13750_IG15
+						;; size=17 bbWeight=8 PerfScore 66.00
+G_M13750_IG14:
+       mov      edi, dword ptr [rdi+0x18]
+       test     edi, edi
+       jg       SHORT G_M13750_IG16
+						;; size=7 bbWeight=1 PerfScore 3.25
+G_M13750_IG15:
+       add      rsp, 8
+       ret      
+						;; size=5 bbWeight=1 PerfScore 1.25
+G_M13750_IG16:
+       mov      rdi, rbx
+       mov      rax, 0xD1FFAB1E      ; code for System.Threading.ReaderWriterLockSlim:ExitReadLock():this
+       call     [rax]System.Threading.ReaderWriterLockSlim:ExitReadLock():this
+       jmp      SHORT G_M13750_IG15
+						;; size=17 bbWeight=1 PerfScore 5.50
 
-; Total bytes of code 270, prolog size 16, PerfScore 36.12, instruction count 58, allocated bytes for code 270 (MethodHash=0c73ca49) for method Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO (FullOpts)
+; Total bytes of code 532, prolog size 31, PerfScore 173.75, instruction count 124, allocated bytes for code 532 (MethodHash=0c73ca49) for method Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSO (FullOpts)
 ; ============================================================

262 (97.04 % of base) - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDC_V2Client(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2

 ; Assembly listing for method Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDC_V2Client(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2 (FullOpts)
 ; Emitting BLENDED_CODE for x64 + VEX + EVEX on Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
-; partially interruptible
+; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 7 single block inlinees; 0 inlinees without PGO data
+; 0 inlinees with PGO data; 13 single block inlinees; 7 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T03] (  4,  3.50)     ref  ->  rbx         class-hnd single-def <Amazon.RegionEndpoint>
-;  V01 arg1         [V01,T04] (  4,  3.50)     ref  ->  r15         class-hnd single-def <System.Net.IWebProxy>
-;  V02 loc0         [V02,T05] (  4,  3.50)     ref  ->  rax         class-hnd <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2>
+;  V00 arg0         [V00,T04] (  4,  4   )     ref  ->  [rbp-0x20]  class-hnd EH-live single-def <Amazon.RegionEndpoint>
+;  V01 arg1         [V01,T05] (  4,  4   )     ref  ->  [rbp-0x28]  class-hnd EH-live single-def <System.Net.IWebProxy>
+;  V02 loc0         [V02,T17] (  3,  3   )     ref  ->  rax         class-hnd <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2>
 ;  V03 OutArgs      [V03    ] (  1,  1   )  struct ( 8) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <UNNAMED>
-;  V04 tmp1         [V04,T00] (  4,  8   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.SSOOIDCClientContext>
-;  V05 tmp2         [V05,T02] (  3,  6   )     ref  ->  r13         class-hnd exact single-def "impAppendStmt" <Amazon.RuntimeDependencies.GlobalRuntimeDependencyRegistry>
-;  V06 tmp3         [V06,T01] (  4,  8   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.CreateInstanceContext>
+;  V04 tmp1         [V04,T02] (  4,  8   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.SSOOIDCClientContext>
+;  V05 tmp2         [V05,T06] (  4,  6   )     ref  ->  [rbp-0x30]  class-hnd exact EH-live spill-single-def "impAppendStmt" <Amazon.RuntimeDependencies.GlobalRuntimeDependencyRegistry>
+;  V06 tmp3         [V06,T03] (  4,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.CreateInstanceContext>
+;* V07 tmp4         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline return value spill temp" <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2>
+;* V08 tmp5         [V08    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "impAppendStmt" <System.Collections.Generic.IDictionary`2[System.String,Amazon.RuntimeDependencies.RuntimeDependencyFactory]>
+;  V09 tmp6         [V09    ] (  4,  4   )     ref  ->  [rbp-0x18]  do-not-enreg[X] must-init addr-exposed ld-addr-op class-hnd "Inline ldloca(s) first use temp" <Amazon.RuntimeDependencies.RuntimeDependencyFactory>
+;* V10 tmp7         [V10    ] (  0,  0   )     ref  ->  zero-ref    ld-addr-op class-hnd "Inline ldloca(s) first use temp" <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2>
+;  V11 tmp8         [V11,T11] (  4,  4   )     ref  ->  [rbp-0x38]  do-not-enreg[M] must-init class-hnd EH-live "Inline stloc first use temp" <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2>
+;  V12 tmp9         [V12,T07] (  3,  6   )     ref  ->  rax         class-hnd single-def "Inlining Arg" <System.Threading.ReaderWriterLockSlim>
+;* V13 tmp10        [V13    ] (  0,  0   )  struct ( 8) zero-ref    ld-addr-op "NewObj constructor temp" <System.Threading.ReaderWriterLockSlim+TimeoutTracker>
+;* V14 tmp11        [V14    ] (  0,  0   )     int  ->  zero-ref    ld-addr-op "Inlining Arg"
+;* V15 tmp12        [V15    ] (  0,  0   )     int  ->  zero-ref    single-def "Inline return value spill temp"
+;* V16 tmp13        [V16    ] (  0,  0   )  struct ( 8) zero-ref    "Inlining Arg" <System.Threading.ReaderWriterLockSlim+TimeoutTracker>
+;* V17 tmp14        [V17    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
+;  V18 tmp15        [V18,T08] (  3,  6   )     ref  ->  r15         class-hnd single-def "Inlining Arg" <System.Threading.ReaderWriterLockSlim>
+;* V19 tmp16        [V19    ] (  0,  0   )     int  ->  zero-ref    "Inline return value spill temp"
+;  V20 tmp17        [V20,T20] (  2,  2   )     int  ->  rdi         "Inline stloc first use temp"
+;* V21 tmp18        [V21    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Threading.ReaderWriterCount>
+;  V22 tmp19        [V22,T18] (  2,  2   )     ref  ->  rdi         class-hnd "Inline return value spill temp" <System.Threading.ReaderWriterCount>
+;  V23 tmp20        [V23,T00] (  7, 35   )     ref  ->  rdi         class-hnd "Inline stloc first use temp" <System.Threading.ReaderWriterCount>
+;* V24 tmp21        [V24    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.Threading.ReaderWriterCount>
+;* V25 tmp22        [V25    ] (  0,  0   )     int  ->  zero-ref    single-def "field V13._total (fldOffset=0x0)" P-INDEP
+;* V26 tmp23        [V26    ] (  0,  0   )     int  ->  zero-ref    single-def "field V13._start (fldOffset=0x4)" P-INDEP
+;* V27 tmp24        [V27    ] (  0,  0   )     int  ->  zero-ref    "field V16._total (fldOffset=0x0)" P-INDEP
+;* V28 tmp25        [V28    ] (  0,  0   )     int  ->  zero-ref    "field V16._start (fldOffset=0x4)" P-INDEP
+;  V29 tmp26        [V29,T13] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
+;  V30 tmp27        [V30,T14] (  2,  4   )     ref  ->  rbx         single-def "argument with side effect"
+;  V31 tmp28        [V31,T15] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
+;  V32 tmp29        [V32,T16] (  2,  4   )     ref  ->  rax         single-def "argument with side effect"
+;  V33 cse0         [V33,T01] (  2,  9   )    long  ->  rax         hoist "CSE #01: aggressive"
+;  V34 cse1         [V34,T19] (  3,  3   )     ref  ->  rbx         "CSE #02: moderate"
+;  V35 rat0         [V35,T12] (  3,  4   )   byref  ->  rax         "TLS field access"
+;  V36 rat1         [V36,T10] (  3,  6   )    long  ->  rax         "TLS access"
+;  V37 rat2         [V37,T09] (  3,  6   )   byref  ->  rax         "ThreadStaticBlockBase access"
 ;
-; Lcl frame size = 8
+; Lcl frame size = 48
 
 G_M18457_IG01:
        push     rbp
        push     r15
-       push     r14
-       push     r13
-       push     r12
        push     rbx
-       push     rax
-       lea      rbp, [rsp+0x30]
-       mov      rbx, rdi
-       mov      r15, rsi
-						;; size=22 bbWeight=1 PerfScore 8.00
+       sub      rsp, 48
+       lea      rbp, [rsp+0x40]
+       xor      eax, eax
+       mov      qword ptr [rbp-0x18], rax
+       mov      qword ptr [rbp-0x38], rax
+       mov      gword ptr [rbp-0x20], rdi
+       mov      gword ptr [rbp-0x28], rsi
+						;; size=31 bbWeight=1 PerfScore 8.00
 G_M18457_IG02:
        mov      rdi, 0xD1FFAB1E      ; Amazon.RuntimeDependencies.SSOOIDCClientContext
        call     CORINFO_HELP_NEWSFAST
-       mov      r14, rax
+       mov      rbx, rax
        mov      rdi, 0xD1FFAB1E      ; const ptr
-       mov      r13, gword ptr [rdi]
-       lea      rdi, bword ptr [r14+0x08]
-       mov      rsi, rbx
+       mov      rdi, gword ptr [rdi]
+       mov      gword ptr [rbp-0x30], rdi
+       lea      rdi, bword ptr [rbx+0x08]
+       mov      rsi, gword ptr [rbp-0x20]
        call     CORINFO_HELP_ASSIGN_REF
-       lea      rdi, bword ptr [r14+0x10]
-       mov      rsi, r15
+       lea      rdi, bword ptr [rbx+0x10]
+       mov      rsi, gword ptr [rbp-0x28]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rdi, 0xD1FFAB1E      ; Amazon.RuntimeDependencies.CreateInstanceContext
        call     CORINFO_HELP_NEWSFAST
-       mov      r12, rax
-       lea      rdi, bword ptr [r12+0x30]
-       mov      rsi, r14
-       call     CORINFO_HELP_ASSIGN_REF
-       mov      dword ptr [r12+0x48], 5
-       mov      rdi, r13
-       mov      rsi, 0xD1FFAB1E      ; Amazon.RuntimeDependencies.BaseRuntimeDependencyRegistry
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rdi, r13
-       mov      rcx, r12
-       mov      rsi, 0xD1FFAB1E      ; 'AWSSDK.SSOOIDC'
-       mov      rdx, 0xD1FFAB1E      ; 'Amazon.SSOOIDC.AmazonSSOOIDCClient'
-       call     rax
-       test     rax, rax
-       jne      SHORT G_M18457_IG04
-						;; size=163 bbWeight=1 PerfScore 20.75
-G_M18457_IG03:
-       mov      gword ptr [rsp], r15
+       mov      r15, rax
+       lea      rdi, bword ptr [r15+0x30]
        mov      rsi, rbx
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      dword ptr [r15+0x48], 5
+						;; size=99 bbWeight=1 PerfScore 14.00
+G_M18457_IG03:
+       mov      rdi, gword ptr [rbp-0x30]
+       mov      rax, gword ptr [rdi+0x08]
+       cmp      byte  ptr [rax], al
+       mov      esi, 0xD1FFAB1E
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.Threading.ReaderWriterLockSlim:TryEnterReadLockCore(System.Threading.ReaderWriterLockSlim+TimeoutTracker):bool:this
+       call     [rax]System.Threading.ReaderWriterLockSlim:TryEnterReadLockCore(System.Threading.ReaderWriterLockSlim+TimeoutTracker):bool:this
+       mov      rdi, gword ptr [rbp-0x30]
+       mov      rbx, gword ptr [rdi+0x10]
+       mov      rdi, 0xD1FFAB1E      ; 'AWSSDK.SSOOIDC'
+       mov      rsi, 0xD1FFAB1E      ; '_'
+       mov      rdx, 0xD1FFAB1E      ; 'Amazon.SSOOIDC.AmazonSSOOIDCClient'
+       mov      rax, 0xD1FFAB1E      ; code for System.String:Concat(System.String,System.String,System.String):System.String
+       call     [rax]System.String:Concat(System.String,System.String,System.String):System.String
+       mov      rsi, rax
+       mov      rdi, rbx
+       lea      rdx, [rbp-0x18]
+       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IDictionary`2[System.__Canon,System.__Canon]:TryGetValue(System.__Canon,byref):bool:this
+       call     [r11]System.Collections.Generic.IDictionary`2[System.__Canon,System.__Canon]:TryGetValue(System.__Canon,byref):bool:this
+       test     eax, eax
+       jne      SHORT G_M18457_IG04
+       xor      rsi, rsi
+       mov      gword ptr [rbp-0x38], rsi
+       jmp      SHORT G_M18457_IG05
+						;; size=115 bbWeight=1 PerfScore 24.50
+G_M18457_IG04:
+       mov      rdi, gword ptr [rbp-0x18]
+       mov      rsi, r15
+       mov      rdi, gword ptr [rdi+0x10]
+       mov      rax, gword ptr [rbp-0x18]
+       call     [rax+0x18]Amazon.RuntimeDependencies.RuntimeDependencyFactory:Invoke(Amazon.RuntimeDependencies.CreateInstanceContext):System.Object:this
+       mov      rsi, rax
+       mov      rdi, 0xD1FFAB1E      ; Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2
+       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_ISINSTANCEOFINTERFACE
+       call     [rax]CORINFO_HELP_ISINSTANCEOFINTERFACE
+       mov      gword ptr [rbp-0x38], rax
+						;; size=47 bbWeight=1 PerfScore 12.00
+G_M18457_IG05:
+       call     G_M18457_IG09
+       nop      
+						;; size=6 bbWeight=1 PerfScore 1.25
+G_M18457_IG06:
+       xor      rsi, rsi
+       mov      gword ptr [rbp-0x18], rsi
+       mov      rax, gword ptr [rbp-0x38]
+       cmp      gword ptr [rbp-0x38], 0
+       jne      SHORT G_M18457_IG07
+       mov      rsi, gword ptr [rbp-0x28]
+       mov      gword ptr [rsp], rsi
+       mov      rsi, gword ptr [rbp-0x20]
        mov      rdi, 0xD1FFAB1E      ; Amazon.Runtime.Internal.SSOServiceClientHelpers:CreateClient[Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2](Amazon.RegionEndpoint,System.String,System.String,System.String,System.String,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2
        mov      rdx, 0xD1FFAB1E      ; 'Amazon.SSOOIDC.AmazonSSOOIDCClient'
        mov      rcx, 0xD1FFAB1E      ; 'Amazon.SSOOIDC.AmazonSSOOIDCConfig'
        mov      r8, 0xD1FFAB1E      ; 'AWSSDK.SSOOIDC'
        mov      r9, 0xD1FFAB1E      ; 'RegisterSSOOIDCClient'
        mov      rax, 0xD1FFAB1E      ; code for Amazon.Runtime.Internal.SSOServiceClientHelpers:CreateClient[System.__Canon](Amazon.RegionEndpoint,System.String,System.String,System.String,System.String,System.Net.IWebProxy):System.__Canon
        call     [rax]Amazon.Runtime.Internal.SSOServiceClientHelpers:CreateClient[System.__Canon](Amazon.RegionEndpoint,System.String,System.String,System.String,System.String,System.Net.IWebProxy):System.__Canon
-						;; size=69 bbWeight=0.50 PerfScore 2.88
-G_M18457_IG04:
+						;; size=91 bbWeight=1 PerfScore 11.75
+G_M18457_IG07:
        nop      
 						;; size=1 bbWeight=1 PerfScore 0.25
-G_M18457_IG05:
-       add      rsp, 8
+G_M18457_IG08:
+       add      rsp, 48
        pop      rbx
-       pop      r12
-       pop      r13
-       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=15 bbWeight=1 PerfScore 4.25
+						;; size=9 bbWeight=1 PerfScore 2.75
+G_M18457_IG09:
+       push     rax
+						;; size=1 bbWeight=1 PerfScore 1.00
+G_M18457_IG10:
+       mov      rdi, gword ptr [rbp-0x30]
+       mov      rbx, gword ptr [rdi+0x08]
+       mov      r15, rbx
+       cmp      byte  ptr [r15], r15b
+       mov      rdi, 0xD1FFAB1E
+       mov      rax, 0xD1FFAB1E      ; function address
+       call     rax
+       cmp      dword ptr [rax], 9
+       jle      SHORT G_M18457_IG11
+       mov      rdi, gword ptr [rax+0x08]
+       mov      rax, bword ptr [rdi+0x48]
+       test     rax, rax
+       jne      SHORT G_M18457_IG12
+						;; size=54 bbWeight=1 PerfScore 17.00
+G_M18457_IG11:
+       mov      edi, 9
+       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_GETDYNAMIC_GCTHREADSTATIC_BASE_NOCTOR_OPTIMIZED
+       call     [rax]CORINFO_HELP_GETDYNAMIC_GCTHREADSTATIC_BASE_NOCTOR_OPTIMIZED
+       jmp      SHORT G_M18457_IG12
+       align    [0 bytes for IG13]
+						;; size=19 bbWeight=0 PerfScore 0.00
+G_M18457_IG12:
+       mov      rdi, gword ptr [rax+0x10]
+       test     rdi, rdi
+       je       SHORT G_M18457_IG15
+       mov      rax, qword ptr [r15+0x28]
+						;; size=13 bbWeight=1 PerfScore 5.25
+G_M18457_IG13:
+       cmp      qword ptr [rdi+0x10], rax
+       je       SHORT G_M18457_IG14
+       mov      rdi, gword ptr [rdi+0x08]
+       test     rdi, rdi
+       jne      SHORT G_M18457_IG13
+       jmp      SHORT G_M18457_IG15
+						;; size=17 bbWeight=8 PerfScore 66.00
+G_M18457_IG14:
+       mov      edi, dword ptr [rdi+0x18]
+       test     edi, edi
+       jg       SHORT G_M18457_IG16
+						;; size=7 bbWeight=1 PerfScore 3.25
+G_M18457_IG15:
+       add      rsp, 8
+       ret      
+						;; size=5 bbWeight=1 PerfScore 1.25
+G_M18457_IG16:
+       mov      rdi, rbx
+       mov      rax, 0xD1FFAB1E      ; code for System.Threading.ReaderWriterLockSlim:ExitReadLock():this
+       call     [rax]System.Threading.ReaderWriterLockSlim:ExitReadLock():this
+       jmp      SHORT G_M18457_IG15
+						;; size=17 bbWeight=1 PerfScore 5.50
 
-; Total bytes of code 270, prolog size 16, PerfScore 36.12, instruction count 58, allocated bytes for code 270 (MethodHash=8b9ab7e6) for method Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDC_V2Client(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2 (FullOpts)
+; Total bytes of code 532, prolog size 31, PerfScore 173.75, instruction count 124, allocated bytes for code 532 (MethodHash=8b9ab7e6) for method Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDC_V2Client(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC_V2 (FullOpts)
 ; ============================================================

262 (97.04 % of base) - Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDCClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC

 ; Assembly listing for method Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDCClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC (FullOpts)
 ; Emitting BLENDED_CODE for x64 + VEX + EVEX on Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
-; partially interruptible
+; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 7 single block inlinees; 0 inlinees without PGO data
+; 0 inlinees with PGO data; 13 single block inlinees; 7 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T03] (  4,  3.50)     ref  ->  rbx         class-hnd single-def <Amazon.RegionEndpoint>
-;  V01 arg1         [V01,T04] (  4,  3.50)     ref  ->  r15         class-hnd single-def <System.Net.IWebProxy>
-;  V02 loc0         [V02,T05] (  4,  3.50)     ref  ->  rax         class-hnd <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC>
+;  V00 arg0         [V00,T04] (  4,  4   )     ref  ->  [rbp-0x20]  class-hnd EH-live single-def <Amazon.RegionEndpoint>
+;  V01 arg1         [V01,T05] (  4,  4   )     ref  ->  [rbp-0x28]  class-hnd EH-live single-def <System.Net.IWebProxy>
+;  V02 loc0         [V02,T17] (  3,  3   )     ref  ->  rax         class-hnd <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC>
 ;  V03 OutArgs      [V03    ] (  1,  1   )  struct ( 8) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <UNNAMED>
-;  V04 tmp1         [V04,T00] (  4,  8   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.SSOOIDCClientContext>
-;  V05 tmp2         [V05,T02] (  3,  6   )     ref  ->  r13         class-hnd exact single-def "impAppendStmt" <Amazon.RuntimeDependencies.GlobalRuntimeDependencyRegistry>
-;  V06 tmp3         [V06,T01] (  4,  8   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.CreateInstanceContext>
+;  V04 tmp1         [V04,T02] (  4,  8   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.SSOOIDCClientContext>
+;  V05 tmp2         [V05,T06] (  4,  6   )     ref  ->  [rbp-0x30]  class-hnd exact EH-live spill-single-def "impAppendStmt" <Amazon.RuntimeDependencies.GlobalRuntimeDependencyRegistry>
+;  V06 tmp3         [V06,T03] (  4,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <Amazon.RuntimeDependencies.CreateInstanceContext>
+;* V07 tmp4         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline return value spill temp" <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC>
+;* V08 tmp5         [V08    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "impAppendStmt" <System.Collections.Generic.IDictionary`2[System.String,Amazon.RuntimeDependencies.RuntimeDependencyFactory]>
+;  V09 tmp6         [V09    ] (  4,  4   )     ref  ->  [rbp-0x18]  do-not-enreg[X] must-init addr-exposed ld-addr-op class-hnd "Inline ldloca(s) first use temp" <Amazon.RuntimeDependencies.RuntimeDependencyFactory>
+;* V10 tmp7         [V10    ] (  0,  0   )     ref  ->  zero-ref    ld-addr-op class-hnd "Inline ldloca(s) first use temp" <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC>
+;  V11 tmp8         [V11,T11] (  4,  4   )     ref  ->  [rbp-0x38]  do-not-enreg[M] must-init class-hnd EH-live "Inline stloc first use temp" <Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC>
+;  V12 tmp9         [V12,T07] (  3,  6   )     ref  ->  rax         class-hnd single-def "Inlining Arg" <System.Threading.ReaderWriterLockSlim>
+;* V13 tmp10        [V13    ] (  0,  0   )  struct ( 8) zero-ref    ld-addr-op "NewObj constructor temp" <System.Threading.ReaderWriterLockSlim+TimeoutTracker>
+;* V14 tmp11        [V14    ] (  0,  0   )     int  ->  zero-ref    ld-addr-op "Inlining Arg"
+;* V15 tmp12        [V15    ] (  0,  0   )     int  ->  zero-ref    single-def "Inline return value spill temp"
+;* V16 tmp13        [V16    ] (  0,  0   )  struct ( 8) zero-ref    "Inlining Arg" <System.Threading.ReaderWriterLockSlim+TimeoutTracker>
+;* V17 tmp14        [V17    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
+;  V18 tmp15        [V18,T08] (  3,  6   )     ref  ->  r15         class-hnd single-def "Inlining Arg" <System.Threading.ReaderWriterLockSlim>
+;* V19 tmp16        [V19    ] (  0,  0   )     int  ->  zero-ref    "Inline return value spill temp"
+;  V20 tmp17        [V20,T20] (  2,  2   )     int  ->  rdi         "Inline stloc first use temp"
+;* V21 tmp18        [V21    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Threading.ReaderWriterCount>
+;  V22 tmp19        [V22,T18] (  2,  2   )     ref  ->  rdi         class-hnd "Inline return value spill temp" <System.Threading.ReaderWriterCount>
+;  V23 tmp20        [V23,T00] (  7, 35   )     ref  ->  rdi         class-hnd "Inline stloc first use temp" <System.Threading.ReaderWriterCount>
+;* V24 tmp21        [V24    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.Threading.ReaderWriterCount>
+;* V25 tmp22        [V25    ] (  0,  0   )     int  ->  zero-ref    single-def "field V13._total (fldOffset=0x0)" P-INDEP
+;* V26 tmp23        [V26    ] (  0,  0   )     int  ->  zero-ref    single-def "field V13._start (fldOffset=0x4)" P-INDEP
+;* V27 tmp24        [V27    ] (  0,  0   )     int  ->  zero-ref    "field V16._total (fldOffset=0x0)" P-INDEP
+;* V28 tmp25        [V28    ] (  0,  0   )     int  ->  zero-ref    "field V16._start (fldOffset=0x4)" P-INDEP
+;  V29 tmp26        [V29,T13] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
+;  V30 tmp27        [V30,T14] (  2,  4   )     ref  ->  rbx         single-def "argument with side effect"
+;  V31 tmp28        [V31,T15] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
+;  V32 tmp29        [V32,T16] (  2,  4   )     ref  ->  rax         single-def "argument with side effect"
+;  V33 cse0         [V33,T01] (  2,  9   )    long  ->  rax         hoist "CSE #01: aggressive"
+;  V34 cse1         [V34,T19] (  3,  3   )     ref  ->  rbx         "CSE #02: moderate"
+;  V35 rat0         [V35,T12] (  3,  4   )   byref  ->  rax         "TLS field access"
+;  V36 rat1         [V36,T10] (  3,  6   )    long  ->  rax         "TLS access"
+;  V37 rat2         [V37,T09] (  3,  6   )   byref  ->  rax         "ThreadStaticBlockBase access"
 ;
-; Lcl frame size = 8
+; Lcl frame size = 48
 
 G_M65337_IG01:
        push     rbp
        push     r15
-       push     r14
-       push     r13
-       push     r12
        push     rbx
-       push     rax
-       lea      rbp, [rsp+0x30]
-       mov      rbx, rdi
-       mov      r15, rsi
-						;; size=22 bbWeight=1 PerfScore 8.00
+       sub      rsp, 48
+       lea      rbp, [rsp+0x40]
+       xor      eax, eax
+       mov      qword ptr [rbp-0x18], rax
+       mov      qword ptr [rbp-0x38], rax
+       mov      gword ptr [rbp-0x20], rdi
+       mov      gword ptr [rbp-0x28], rsi
+						;; size=31 bbWeight=1 PerfScore 8.00
 G_M65337_IG02:
        mov      rdi, 0xD1FFAB1E      ; Amazon.RuntimeDependencies.SSOOIDCClientContext
        call     CORINFO_HELP_NEWSFAST
-       mov      r14, rax
+       mov      rbx, rax
        mov      rdi, 0xD1FFAB1E      ; const ptr
-       mov      r13, gword ptr [rdi]
-       lea      rdi, bword ptr [r14+0x08]
-       mov      rsi, rbx
+       mov      rdi, gword ptr [rdi]
+       mov      gword ptr [rbp-0x30], rdi
+       lea      rdi, bword ptr [rbx+0x08]
+       mov      rsi, gword ptr [rbp-0x20]
        call     CORINFO_HELP_ASSIGN_REF
-       lea      rdi, bword ptr [r14+0x10]
-       mov      rsi, r15
+       lea      rdi, bword ptr [rbx+0x10]
+       mov      rsi, gword ptr [rbp-0x28]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rdi, 0xD1FFAB1E      ; Amazon.RuntimeDependencies.CreateInstanceContext
        call     CORINFO_HELP_NEWSFAST
-       mov      r12, rax
-       lea      rdi, bword ptr [r12+0x30]
-       mov      rsi, r14
-       call     CORINFO_HELP_ASSIGN_REF
-       mov      dword ptr [r12+0x48], 5
-       mov      rdi, r13
-       mov      rsi, 0xD1FFAB1E      ; Amazon.RuntimeDependencies.BaseRuntimeDependencyRegistry
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rdi, r13
-       mov      rcx, r12
-       mov      rsi, 0xD1FFAB1E      ; 'AWSSDK.SSOOIDC'
-       mov      rdx, 0xD1FFAB1E      ; 'Amazon.SSOOIDC.AmazonSSOOIDCClient'
-       call     rax
-       test     rax, rax
-       jne      SHORT G_M65337_IG04
-						;; size=163 bbWeight=1 PerfScore 20.75
-G_M65337_IG03:
-       mov      gword ptr [rsp], r15
+       mov      r15, rax
+       lea      rdi, bword ptr [r15+0x30]
        mov      rsi, rbx
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      dword ptr [r15+0x48], 5
+						;; size=99 bbWeight=1 PerfScore 14.00
+G_M65337_IG03:
+       mov      rdi, gword ptr [rbp-0x30]
+       mov      rax, gword ptr [rdi+0x08]
+       cmp      byte  ptr [rax], al
+       mov      esi, 0xD1FFAB1E
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.Threading.ReaderWriterLockSlim:TryEnterReadLockCore(System.Threading.ReaderWriterLockSlim+TimeoutTracker):bool:this
+       call     [rax]System.Threading.ReaderWriterLockSlim:TryEnterReadLockCore(System.Threading.ReaderWriterLockSlim+TimeoutTracker):bool:this
+       mov      rdi, gword ptr [rbp-0x30]
+       mov      rbx, gword ptr [rdi+0x10]
+       mov      rdi, 0xD1FFAB1E      ; 'AWSSDK.SSOOIDC'
+       mov      rsi, 0xD1FFAB1E      ; '_'
+       mov      rdx, 0xD1FFAB1E      ; 'Amazon.SSOOIDC.AmazonSSOOIDCClient'
+       mov      rax, 0xD1FFAB1E      ; code for System.String:Concat(System.String,System.String,System.String):System.String
+       call     [rax]System.String:Concat(System.String,System.String,System.String):System.String
+       mov      rsi, rax
+       mov      rdi, rbx
+       lea      rdx, [rbp-0x18]
+       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IDictionary`2[System.__Canon,System.__Canon]:TryGetValue(System.__Canon,byref):bool:this
+       call     [r11]System.Collections.Generic.IDictionary`2[System.__Canon,System.__Canon]:TryGetValue(System.__Canon,byref):bool:this
+       test     eax, eax
+       jne      SHORT G_M65337_IG04
+       xor      rsi, rsi
+       mov      gword ptr [rbp-0x38], rsi
+       jmp      SHORT G_M65337_IG05
+						;; size=115 bbWeight=1 PerfScore 24.50
+G_M65337_IG04:
+       mov      rdi, gword ptr [rbp-0x18]
+       mov      rsi, r15
+       mov      rdi, gword ptr [rdi+0x10]
+       mov      rax, gword ptr [rbp-0x18]
+       call     [rax+0x18]Amazon.RuntimeDependencies.RuntimeDependencyFactory:Invoke(Amazon.RuntimeDependencies.CreateInstanceContext):System.Object:this
+       mov      rsi, rax
+       mov      rdi, 0xD1FFAB1E      ; Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC
+       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_ISINSTANCEOFINTERFACE
+       call     [rax]CORINFO_HELP_ISINSTANCEOFINTERFACE
+       mov      gword ptr [rbp-0x38], rax
+						;; size=47 bbWeight=1 PerfScore 12.00
+G_M65337_IG05:
+       call     G_M65337_IG09
+       nop      
+						;; size=6 bbWeight=1 PerfScore 1.25
+G_M65337_IG06:
+       xor      rsi, rsi
+       mov      gword ptr [rbp-0x18], rsi
+       mov      rax, gword ptr [rbp-0x38]
+       cmp      gword ptr [rbp-0x38], 0
+       jne      SHORT G_M65337_IG07
+       mov      rsi, gword ptr [rbp-0x28]
+       mov      gword ptr [rsp], rsi
+       mov      rsi, gword ptr [rbp-0x20]
        mov      rdi, 0xD1FFAB1E      ; Amazon.Runtime.Internal.SSOServiceClientHelpers:CreateClient[Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC](Amazon.RegionEndpoint,System.String,System.String,System.String,System.String,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC
        mov      rdx, 0xD1FFAB1E      ; 'Amazon.SSOOIDC.AmazonSSOOIDCClient'
        mov      rcx, 0xD1FFAB1E      ; 'Amazon.SSOOIDC.AmazonSSOOIDCConfig'
        mov      r8, 0xD1FFAB1E      ; 'AWSSDK.SSOOIDC'
        mov      r9, 0xD1FFAB1E      ; 'RegisterSSOOIDCClient'
        mov      rax, 0xD1FFAB1E      ; code for Amazon.Runtime.Internal.SSOServiceClientHelpers:CreateClient[System.__Canon](Amazon.RegionEndpoint,System.String,System.String,System.String,System.String,System.Net.IWebProxy):System.__Canon
        call     [rax]Amazon.Runtime.Internal.SSOServiceClientHelpers:CreateClient[System.__Canon](Amazon.RegionEndpoint,System.String,System.String,System.String,System.String,System.Net.IWebProxy):System.__Canon
-						;; size=69 bbWeight=0.50 PerfScore 2.88
-G_M65337_IG04:
+						;; size=91 bbWeight=1 PerfScore 11.75
+G_M65337_IG07:
        nop      
 						;; size=1 bbWeight=1 PerfScore 0.25
-G_M65337_IG05:
-       add      rsp, 8
+G_M65337_IG08:
+       add      rsp, 48
        pop      rbx
-       pop      r12
-       pop      r13
-       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=15 bbWeight=1 PerfScore 4.25
+						;; size=9 bbWeight=1 PerfScore 2.75
+G_M65337_IG09:
+       push     rax
+						;; size=1 bbWeight=1 PerfScore 1.00
+G_M65337_IG10:
+       mov      rdi, gword ptr [rbp-0x30]
+       mov      rbx, gword ptr [rdi+0x08]
+       mov      r15, rbx
+       cmp      byte  ptr [r15], r15b
+       mov      rdi, 0xD1FFAB1E
+       mov      rax, 0xD1FFAB1E      ; function address
+       call     rax
+       cmp      dword ptr [rax], 9
+       jle      SHORT G_M65337_IG11
+       mov      rdi, gword ptr [rax+0x08]
+       mov      rax, bword ptr [rdi+0x48]
+       test     rax, rax
+       jne      SHORT G_M65337_IG12
+						;; size=54 bbWeight=1 PerfScore 17.00
+G_M65337_IG11:
+       mov      edi, 9
+       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_GETDYNAMIC_GCTHREADSTATIC_BASE_NOCTOR_OPTIMIZED
+       call     [rax]CORINFO_HELP_GETDYNAMIC_GCTHREADSTATIC_BASE_NOCTOR_OPTIMIZED
+       jmp      SHORT G_M65337_IG12
+       align    [0 bytes for IG13]
+						;; size=19 bbWeight=0 PerfScore 0.00
+G_M65337_IG12:
+       mov      rdi, gword ptr [rax+0x10]
+       test     rdi, rdi
+       je       SHORT G_M65337_IG15
+       mov      rax, qword ptr [r15+0x28]
+						;; size=13 bbWeight=1 PerfScore 5.25
+G_M65337_IG13:
+       cmp      qword ptr [rdi+0x10], rax
+       je       SHORT G_M65337_IG14
+       mov      rdi, gword ptr [rdi+0x08]
+       test     rdi, rdi
+       jne      SHORT G_M65337_IG13
+       jmp      SHORT G_M65337_IG15
+						;; size=17 bbWeight=8 PerfScore 66.00
+G_M65337_IG14:
+       mov      edi, dword ptr [rdi+0x18]
+       test     edi, edi
+       jg       SHORT G_M65337_IG16
+						;; size=7 bbWeight=1 PerfScore 3.25
+G_M65337_IG15:
+       add      rsp, 8
+       ret      
+						;; size=5 bbWeight=1 PerfScore 1.25
+G_M65337_IG16:
+       mov      rdi, rbx
+       mov      rax, 0xD1FFAB1E      ; code for System.Threading.ReaderWriterLockSlim:ExitReadLock():this
+       call     [rax]System.Threading.ReaderWriterLockSlim:ExitReadLock():this
+       jmp      SHORT G_M65337_IG15
+						;; size=17 bbWeight=1 PerfScore 5.50
 
-; Total bytes of code 270, prolog size 16, PerfScore 36.12, instruction count 58, allocated bytes for code 270 (MethodHash=996600c6) for method Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDCClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC (FullOpts)
+; Total bytes of code 532, prolog size 31, PerfScore 173.75, instruction count 124, allocated bytes for code 532 (MethodHash=996600c6) for method Amazon.Runtime.Internal.SSOServiceClientHelpers:BuildSSOIDCClient(Amazon.RegionEndpoint,System.Net.IWebProxy):Amazon.Runtime.SharedInterfaces.ICoreAmazonSSOOIDC (FullOpts)
 ; ============================================================

65 (80.25 % of base) - SixLabors.ImageSharp.Formats.Webp.WebpDecoder:Decode(SixLabors.ImageSharp.Formats.DecoderOptions,System.IO.Stream,System.Threading.CancellationToken):SixLabors.ImageSharp.Image:this

 ; Assembly listing for method SixLabors.ImageSharp.Formats.Webp.WebpDecoder:Decode(SixLabors.ImageSharp.Formats.DecoderOptions,System.IO.Stream,System.Threading.CancellationToken):SixLabors.ImageSharp.Image:this (FullOpts)
 ; Emitting BLENDED_CODE for x64 + VEX + EVEX on Unix
 ; FullOpts code
 ; optimized code
 ; rsp based frame
-; fully interruptible
+; partially interruptible
 ; No PGO data
+; 0 inlinees with PGO data; 5 single block inlinees; 0 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T00] (  4,  4   )     ref  ->  rbx         this class-hnd single-def <SixLabors.ImageSharp.Formats.Webp.WebpDecoder>
-;  V01 arg1         [V01,T01] (  3,  3   )     ref  ->  r15         class-hnd single-def <SixLabors.ImageSharp.Formats.DecoderOptions>
-;  V02 arg2         [V02,T02] (  3,  3   )     ref  ->  r14         class-hnd single-def <System.IO.Stream>
+;  V00 this         [V00,T01] (  4,  4   )     ref  ->  rbx         this class-hnd single-def <SixLabors.ImageSharp.Formats.Webp.WebpDecoder>
+;  V01 arg1         [V01,T03] (  3,  3   )     ref  ->  r15         class-hnd single-def <SixLabors.ImageSharp.Formats.DecoderOptions>
+;  V02 arg2         [V02,T04] (  3,  3   )     ref  ->  r14         class-hnd single-def <System.IO.Stream>
 ;* V03 arg3         [V03    ] (  0,  0   )  struct ( 8) zero-ref    single-def <System.Threading.CancellationToken>
 ;# V04 OutArgs      [V04    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <Empty>
-;  V05 tmp1         [V05,T03] (  2,  2   )     ref  ->  r13         single-def "field V03._source (fldOffset=0x0)" P-INDEP
+;  V05 tmp1         [V05,T00] (  4,  8   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <SixLabors.ImageSharp.Formats.Webp.WebpDecoderOptions>
+;  V06 tmp2         [V06,T02] (  3,  6   )     ref  ->  [rsp+0x08]  class-hnd exact spill-single-def "NewObj constructor temp" <SixLabors.ImageSharp.Formats.DecoderOptions>
+;  V07 tmp3         [V07,T05] (  2,  2   )     ref  ->  r13         single-def "field V03._source (fldOffset=0x0)" P-INDEP
 ;
-; Lcl frame size = 8
+; Lcl frame size = 16
 
 G_M25750_IG01:
        push     r15
        push     r14
        push     r13
+       push     r12
        push     rbx
-       push     rax
+       sub      rsp, 16
        mov      rbx, rdi
        mov      r15, rsi
        mov      r14, rdx
        mov      r13, rcx
-						;; size=20 bbWeight=1 PerfScore 6.00
+						;; size=25 bbWeight=1 PerfScore 6.25
 G_M25750_IG02:
-       mov      rdi, rbx
-       mov      rsi, 0xD1FFAB1E      ; SixLabors.ImageSharp.Formats.SpecializedImageDecoder`1[SixLabors.ImageSharp.Formats.Webp.WebpDecoderOptions]
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rdi, rbx
+       cmp      byte  ptr [rbx], bl
+       mov      rdi, 0xD1FFAB1E      ; SixLabors.ImageSharp.Formats.Webp.WebpDecoderOptions
+       call     CORINFO_HELP_NEWSFAST
+       mov      r12, rax
+       mov      rdi, 0xD1FFAB1E      ; SixLabors.ImageSharp.Formats.DecoderOptions
+       call     CORINFO_HELP_NEWSFAST
+       mov      gword ptr [rsp+0x08], rax
+       mov      rdi, rax
+       mov      rcx, 0xD1FFAB1E      ; code for SixLabors.ImageSharp.Formats.DecoderOptions:.ctor():this
+       call     [rcx]SixLabors.ImageSharp.Formats.DecoderOptions:.ctor():this
+       lea      rdi, bword ptr [r12+0x08]
+       mov      rsi, gword ptr [rsp+0x08]
+       call     CORINFO_HELP_ASSIGN_REF
+       lea      rdi, bword ptr [r12+0x08]
        mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      rdi, rbx
+       mov      rsi, r12
        mov      rdx, r14
        mov      rcx, r13
-						;; size=47 bbWeight=1 PerfScore 5.00
+       mov      rax, 0xD1FFAB1E      ; code for SixLabors.ImageSharp.Formats.Webp.WebpDecoder:Decode[SixLabors.ImageSharp.PixelFormats.Rgba32](SixLabors.ImageSharp.Formats.Webp.WebpDecoderOptions,System.IO.Stream,System.Threading.CancellationToken):SixLabors.ImageSharp.Image`1[SixLabors.ImageSharp.PixelFormats.Rgba32]:this
+						;; size=105 bbWeight=1 PerfScore 14.75
 G_M25750_IG03:
-       add      rsp, 8
+       add      rsp, 16
        pop      rbx
+       pop      r12
        pop      r13
        pop      r14
        pop      r15
-       tail.jmp rax
-						;; size=14 bbWeight=1 PerfScore 4.25
+       tail.jmp [rax]SixLabors.ImageSharp.Formats.Webp.WebpDecoder:Decode[SixLabors.ImageSharp.PixelFormats.Rgba32](SixLabors.ImageSharp.Formats.Webp.WebpDecoderOptions,System.IO.Stream,System.Threading.CancellationToken):SixLabors.ImageSharp.Image`1[SixLabors.ImageSharp.PixelFormats.Rgba32]:this
+						;; size=16 bbWeight=1 PerfScore 4.75
 
-; Total bytes of code 81, prolog size 20, PerfScore 15.25, instruction count 24, allocated bytes for code 81 (MethodHash=6f5e9b69) for method SixLabors.ImageSharp.Formats.Webp.WebpDecoder:Decode(SixLabors.ImageSharp.Formats.DecoderOptions,System.IO.Stream,System.Threading.CancellationToken):SixLabors.ImageSharp.Image:this (FullOpts)
+; Total bytes of code 146, prolog size 13, PerfScore 25.75, instruction count 38, allocated bytes for code 146 (MethodHash=6f5e9b69) for method SixLabors.ImageSharp.Formats.Webp.WebpDecoder:Decode(SixLabors.ImageSharp.Formats.DecoderOptions,System.IO.Stream,System.Threading.CancellationToken):SixLabors.ImageSharp.Image:this (FullOpts)
 ; ============================================================

Note: some changes were skipped as they were too large to fit into a comment.

Larger list of diffs: https://gist.github.com/MihuBot/37b1d6c0b1a013033438d141c783a2fe

[MihuBot]

Top method improvements

-216 (-15.72 % of base) - Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:GetNonBodySectionsStream():System.IO.Stream:this

 ; Assembly listing for method Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:GetNonBodySectionsStream():System.IO.Stream:this (FullOpts)
 ; Emitting BLENDED_CODE for x64 + VEX + EVEX on Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 37 single block inlinees; 9 inlinees without PGO data
+; 0 inlinees with PGO data; 43 single block inlinees; 9 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T00] ( 28, 28   )     ref  ->  rbx         this class-hnd single-def <Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage>
-;  V01 loc0         [V01,T02] ( 29, 11.50)     ref  ->  [rbp-0x60]  class-hnd exact EH-live single-def <Microsoft.Azure.Amqp.BufferListStream>
+;  V00 this         [V00,T00] ( 16, 16   )     ref  ->  rbx         this class-hnd single-def <Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage>
+;  V01 loc0         [V01,T02] ( 29, 11.50)     ref  ->  [rbp-0x58]  class-hnd exact EH-live single-def <Microsoft.Azure.Amqp.BufferListStream>
 ;* V02 loc1         [V02    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def <System.Collections.Generic.List`1[System.ArraySegment`1[byte]]>
 ;* V03 loc2         [V03    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def <Microsoft.Azure.Amqp.BufferListStream>
 ;# V04 OutArgs      [V04    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <Empty>
 ;  V05 tmp1         [V05,T01] (  9, 12   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.List`1[System.ArraySegment`1[byte]]>
-;  V06 tmp2         [V06,T11] (  3,  6   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <Microsoft.Azure.Amqp.BufferListStream>
+;  V06 tmp2         [V06,T10] (  3,  6   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <Microsoft.Azure.Amqp.BufferListStream>
 ;  V07 tmp3         [V07,T03] (  4,  8   )     ref  ->  r15         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.BufferListStream>
-;  V08 tmp4         [V08,T12] (  3,  6   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <Microsoft.Azure.Amqp.BufferListStream>
-;  V09 tmp5         [V09,T05] (  5,  7   )     ref  ->  r13         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.Header>
-;  V10 tmp6         [V10    ] (  1,  0.50)   ubyte  ->  [rbp-0x30]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
-;  V11 tmp7         [V11,T14] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
-;  V12 tmp8         [V12,T21] (  2,  2   )    long  ->  r12         "Inlining Arg"
-;  V13 tmp9         [V13,T06] (  5,  7   )     ref  ->  r13         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.DeliveryAnnotations>
-;  V14 tmp10        [V14    ] (  1,  0.50)   ubyte  ->  [rbp-0x38]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
-;  V15 tmp11        [V15,T15] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
-;  V16 tmp12        [V16,T22] (  2,  2   )    long  ->  r12         "Inlining Arg"
-;  V17 tmp13        [V17,T07] (  5,  7   )     ref  ->  r13         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.MessageAnnotations>
-;  V18 tmp14        [V18    ] (  1,  0.50)   ubyte  ->  [rbp-0x40]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
-;  V19 tmp15        [V19,T16] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
-;  V20 tmp16        [V20,T23] (  2,  2   )    long  ->  r12         "Inlining Arg"
-;  V21 tmp17        [V21,T08] (  5,  7   )     ref  ->  r13         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.Properties>
-;  V22 tmp18        [V22    ] (  1,  0.50)   ubyte  ->  [rbp-0x48]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
-;  V23 tmp19        [V23,T17] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
-;  V24 tmp20        [V24,T24] (  2,  2   )    long  ->  r12         "Inlining Arg"
-;  V25 tmp21        [V25,T09] (  5,  7   )     ref  ->  r13         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.ApplicationProperties>
-;  V26 tmp22        [V26    ] (  1,  0.50)   ubyte  ->  [rbp-0x50]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
-;  V27 tmp23        [V27,T18] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
-;  V28 tmp24        [V28,T25] (  2,  2   )    long  ->  r12         "Inlining Arg"
-;  V29 tmp25        [V29,T10] (  5,  7   )     ref  ->  rbx         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.Footer>
-;  V30 tmp26        [V30    ] (  1,  0.50)   ubyte  ->  [rbp-0x58]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
-;  V31 tmp27        [V31,T19] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
-;  V32 tmp28        [V32,T26] (  2,  2   )    long  ->  r14         "Inlining Arg"
-;  V33 tmp29        [V33,T20] (  4,  2   )   byref  ->  registers   "Inlining Arg"
-;  V34 tmp30        [V34,T13] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
-;  V35 cse0         [V35,T04] (  7,  7   )    long  ->  r14         "CSE #02: moderate"
-;  TEMP_01                                   byref  ->  [rbp-0x68]
+;  V08 tmp4         [V08,T11] (  3,  6   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <Microsoft.Azure.Amqp.BufferListStream>
+;  V09 tmp5         [V09,T04] (  5,  7   )     ref  ->  r14         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.Header>
+;  V10 tmp6         [V10    ] (  1,  0.50)   ubyte  ->  [rbp-0x28]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
+;  V11 tmp7         [V11,T13] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
+;  V12 tmp8         [V12,T20] (  2,  2   )    long  ->  r13         "Inlining Arg"
+;  V13 tmp9         [V13,T05] (  5,  7   )     ref  ->  r14         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.DeliveryAnnotations>
+;  V14 tmp10        [V14    ] (  1,  0.50)   ubyte  ->  [rbp-0x30]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
+;  V15 tmp11        [V15,T14] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
+;  V16 tmp12        [V16,T21] (  2,  2   )    long  ->  r13         "Inlining Arg"
+;  V17 tmp13        [V17,T06] (  5,  7   )     ref  ->  r14         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.MessageAnnotations>
+;  V18 tmp14        [V18    ] (  1,  0.50)   ubyte  ->  [rbp-0x38]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
+;  V19 tmp15        [V19,T15] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
+;  V20 tmp16        [V20,T22] (  2,  2   )    long  ->  r13         "Inlining Arg"
+;  V21 tmp17        [V21,T07] (  5,  7   )     ref  ->  r14         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.Properties>
+;  V22 tmp18        [V22    ] (  1,  0.50)   ubyte  ->  [rbp-0x40]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
+;  V23 tmp19        [V23,T16] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
+;  V24 tmp20        [V24,T23] (  2,  2   )    long  ->  r13         "Inlining Arg"
+;  V25 tmp21        [V25,T08] (  5,  7   )     ref  ->  r14         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.ApplicationProperties>
+;  V26 tmp22        [V26    ] (  1,  0.50)   ubyte  ->  [rbp-0x48]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
+;  V27 tmp23        [V27,T17] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
+;  V28 tmp24        [V28,T24] (  2,  2   )    long  ->  r13         "Inlining Arg"
+;  V29 tmp25        [V29,T09] (  5,  7   )     ref  ->  rbx         class-hnd exact single-def "Inlining Arg" <Microsoft.Azure.Amqp.Framing.Footer>
+;  V30 tmp26        [V30    ] (  1,  0.50)   ubyte  ->  [rbp-0x50]  do-not-enreg[X] must-init addr-exposed ld-addr-op "Inline ldloca(s) first use temp"
+;  V31 tmp27        [V31,T18] (  4,  2   )     ref  ->  rax         class-hnd exact single-def "Inline stloc first use temp" <System.ArraySegment`1[byte][]>
+;  V32 tmp28        [V32,T25] (  2,  2   )    long  ->  r14         "Inlining Arg"
+;  V33 tmp29        [V33,T19] (  4,  2   )   byref  ->  registers   "Inlining Arg"
+;  V34 tmp30        [V34,T12] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
 ;
-; Lcl frame size = 72
+; Lcl frame size = 64
 
 G_M3790_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
-       push     r12
        push     rbx
-       sub      rsp, 72
-       lea      rbp, [rsp+0x70]
-       xor      eax, eax
-       mov      qword ptr [rbp-0x68], rax
+       sub      rsp, 64
+       lea      rbp, [rsp+0x60]
        vxorps   xmm8, xmm8, xmm8
-       vmovdqu  ymmword ptr [rbp-0x60], ymm8
-       vmovdqa  xmmword ptr [rbp-0x40], xmm8
-       mov      qword ptr [rbp-0x30], rax
+       vmovdqu  ymmword ptr [rbp-0x50], ymm8
+       vmovdqa  xmmword ptr [rbp-0x30], xmm8
        mov      rbx, rdi
-						;; size=47 bbWeight=1 PerfScore 11.58
+						;; size=35 bbWeight=1 PerfScore 8.33
 G_M3790_IG02:
        mov      rdi, rbx
        mov      esi, 511
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
        cmp      dword ptr [rdi], edi
        call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
        mov      r15, gword ptr [rbx+0xC0]
        cmp      byte  ptr [r15], r15b
        mov      rdi, r15
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
        mov      rdi, 0xD1FFAB1E      ; Microsoft.Azure.Amqp.BufferListStream
        call     CORINFO_HELP_NEWSFAST
        mov      r14, rax
        mov      rsi, gword ptr [r15+0x10]
        mov      rdi, r14
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:.ctor(System.Collections.Generic.IList`1[System.ArraySegment`1[byte]]):this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:.ctor(System.Collections.Generic.IList`1[System.ArraySegment`1[byte]]):this
-       mov      gword ptr [rbp-0x60], r14
+       mov      gword ptr [rbp-0x58], r14
 						;; size=88 bbWeight=1 PerfScore 21.25
 G_M3790_IG03:
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.List`1[System.ArraySegment`1[byte]]
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        mov      rdi, 0xD1FFAB1E      ; global ptr
        test     byte  ptr [rdi], 1
        je       G_M3790_IG17
 						;; size=37 bbWeight=1 PerfScore 4.75
 G_M3790_IG04:
        mov      rdi, 0xD1FFAB1E      ; data for System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:s_emptyArray
        mov      rsi, gword ptr [rdi]
        lea      rdi, bword ptr [r15+0x08]
        call     CORINFO_HELP_ASSIGN_REF
-       lea      rsi, bword ptr [rbx+0x70]
-       mov      bword ptr [rbp-0x68], rsi
        mov      rdi, rbx
-       mov      r14, 0xD1FFAB1E      ; Microsoft.Azure.Amqp.AmqpMessage
-       mov      rsi, r14
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x68]
-       mov      rdi, rbx
-       mov      edx, 1
-       call     rax
-       mov      r13, gword ptr [rbx+0x70]
-       test     r13, r13
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       mov      r14, gword ptr [rbx+0x70]
+       test     r14, r14
        je       SHORT G_M3790_IG06
-						;; size=91 bbWeight=1 PerfScore 17.25
+						;; size=51 bbWeight=1 PerfScore 10.75
 G_M3790_IG05:
-       cmp      qword ptr [r13+0x28], 0
+       cmp      qword ptr [r14+0x28], 0
        jle      SHORT G_M3790_IG06
-       mov      r12, qword ptr [r13+0x20]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      r13, qword ptr [r14+0x20]
+       mov      rdi, gword ptr [rbp-0x58]
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
-       mov      rdi, gword ptr [rbp-0x60]
-       mov      rsi, r12
+       mov      rdi, gword ptr [rbp-0x58]
+       mov      rsi, r13
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
-       mov      esi, dword ptr [r13+0x28]
-       lea      rcx, [rbp-0x30]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      esi, dword ptr [r14+0x28]
+       lea      rcx, [rbp-0x28]
+       mov      rdi, gword ptr [rbp-0x58]
        xor      edx, edx
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        test     rax, rax
        je       SHORT G_M3790_IG06
        cmp      dword ptr [rax+0x08], 0
        je       SHORT G_M3790_IG06
        mov      rdi, r15
        mov      rsi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
        call     [rax]System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
 						;; size=101 bbWeight=0.50 PerfScore 14.38
 G_M3790_IG06:
-       lea      rsi, bword ptr [rbx+0x78]
-       mov      bword ptr [rbp-0x68], rsi
        mov      rdi, rbx
-       mov      rsi, r14
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x68]
-       mov      rdi, rbx
-       mov      edx, 2
-       call     rax
-       mov      r13, gword ptr [rbx+0x78]
-       test     r13, r13
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       mov      r14, gword ptr [rbx+0x78]
+       test     r14, r14
        je       SHORT G_M3790_IG08
-						;; size=59 bbWeight=1 PerfScore 13.25
+						;; size=29 bbWeight=1 PerfScore 7.00
 G_M3790_IG07:
-       cmp      qword ptr [r13+0x28], 0
+       cmp      qword ptr [r14+0x28], 0
        jle      SHORT G_M3790_IG08
-       mov      r12, qword ptr [r13+0x20]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      r13, qword ptr [r14+0x20]
+       mov      rdi, gword ptr [rbp-0x58]
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
-       mov      rdi, gword ptr [rbp-0x60]
-       mov      rsi, r12
+       mov      rdi, gword ptr [rbp-0x58]
+       mov      rsi, r13
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
-       mov      esi, dword ptr [r13+0x28]
-       lea      rcx, [rbp-0x38]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      esi, dword ptr [r14+0x28]
+       lea      rcx, [rbp-0x30]
+       mov      rdi, gword ptr [rbp-0x58]
        xor      edx, edx
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        test     rax, rax
        je       SHORT G_M3790_IG08
        cmp      dword ptr [rax+0x08], 0
        je       SHORT G_M3790_IG08
        mov      rdi, r15
        mov      rsi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
        call     [rax]System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
 						;; size=101 bbWeight=0.50 PerfScore 14.38
 G_M3790_IG08:
-       lea      rsi, bword ptr [rbx+0x80]
-       mov      bword ptr [rbp-0x68], rsi
        mov      rdi, rbx
-       mov      rsi, r14
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x68]
-       mov      rdi, rbx
-       mov      edx, 4
-       call     rax
-       mov      r13, gword ptr [rbx+0x80]
-       test     r13, r13
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       mov      r14, gword ptr [rbx+0x80]
+       test     r14, r14
        je       SHORT G_M3790_IG10
-						;; size=65 bbWeight=1 PerfScore 13.25
+						;; size=32 bbWeight=1 PerfScore 7.00
 G_M3790_IG09:
-       cmp      qword ptr [r13+0x28], 0
+       cmp      qword ptr [r14+0x28], 0
        jle      SHORT G_M3790_IG10
-       mov      r12, qword ptr [r13+0x20]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      r13, qword ptr [r14+0x20]
+       mov      rdi, gword ptr [rbp-0x58]
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
-       mov      rdi, gword ptr [rbp-0x60]
-       mov      rsi, r12
+       mov      rdi, gword ptr [rbp-0x58]
+       mov      rsi, r13
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
-       mov      esi, dword ptr [r13+0x28]
-       lea      rcx, [rbp-0x40]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      esi, dword ptr [r14+0x28]
+       lea      rcx, [rbp-0x38]
+       mov      rdi, gword ptr [rbp-0x58]
        xor      edx, edx
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        test     rax, rax
        je       SHORT G_M3790_IG10
        cmp      dword ptr [rax+0x08], 0
        je       SHORT G_M3790_IG10
        mov      rdi, r15
        mov      rsi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
        call     [rax]System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
 						;; size=101 bbWeight=0.50 PerfScore 14.38
 G_M3790_IG10:
-       lea      rsi, bword ptr [rbx+0x88]
-       mov      bword ptr [rbp-0x68], rsi
        mov      rdi, rbx
-       mov      rsi, r14
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x68]
-       mov      rdi, rbx
-       mov      edx, 8
-       call     rax
-       mov      r13, gword ptr [rbx+0x88]
-       test     r13, r13
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       mov      r14, gword ptr [rbx+0x88]
+       test     r14, r14
        je       SHORT G_M3790_IG12
-						;; size=65 bbWeight=1 PerfScore 13.25
+						;; size=32 bbWeight=1 PerfScore 7.00
 G_M3790_IG11:
-       cmp      qword ptr [r13+0x28], 0
+       cmp      qword ptr [r14+0x28], 0
        jle      SHORT G_M3790_IG12
-       mov      r12, qword ptr [r13+0x20]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      r13, qword ptr [r14+0x20]
+       mov      rdi, gword ptr [rbp-0x58]
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
-       mov      rdi, gword ptr [rbp-0x60]
-       mov      rsi, r12
+       mov      rdi, gword ptr [rbp-0x58]
+       mov      rsi, r13
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
-       mov      esi, dword ptr [r13+0x28]
-       lea      rcx, [rbp-0x48]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      esi, dword ptr [r14+0x28]
+       lea      rcx, [rbp-0x40]
+       mov      rdi, gword ptr [rbp-0x58]
        xor      edx, edx
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        test     rax, rax
        je       SHORT G_M3790_IG12
        cmp      dword ptr [rax+0x08], 0
        je       SHORT G_M3790_IG12
        mov      rdi, r15
        mov      rsi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
        call     [rax]System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
 						;; size=101 bbWeight=0.50 PerfScore 14.38
 G_M3790_IG12:
-       lea      rsi, bword ptr [rbx+0x90]
-       mov      bword ptr [rbp-0x68], rsi
        mov      rdi, rbx
-       mov      rsi, r14
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x68]
-       mov      rdi, rbx
-       mov      edx, 16
-       call     rax
-       mov      r13, gword ptr [rbx+0x90]
-       test     r13, r13
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       mov      r14, gword ptr [rbx+0x90]
+       test     r14, r14
        je       SHORT G_M3790_IG14
-						;; size=65 bbWeight=1 PerfScore 13.25
+						;; size=32 bbWeight=1 PerfScore 7.00
 G_M3790_IG13:
-       cmp      qword ptr [r13+0x28], 0
+       cmp      qword ptr [r14+0x28], 0
        jle      SHORT G_M3790_IG14
-       mov      r12, qword ptr [r13+0x20]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      r13, qword ptr [r14+0x20]
+       mov      rdi, gword ptr [rbp-0x58]
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
-       mov      rdi, gword ptr [rbp-0x60]
-       mov      rsi, r12
+       mov      rdi, gword ptr [rbp-0x58]
+       mov      rsi, r13
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
-       mov      esi, dword ptr [r13+0x28]
-       lea      rcx, [rbp-0x50]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      esi, dword ptr [r14+0x28]
+       lea      rcx, [rbp-0x48]
+       mov      rdi, gword ptr [rbp-0x58]
        xor      edx, edx
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        test     rax, rax
        je       SHORT G_M3790_IG14
        cmp      dword ptr [rax+0x08], 0
        je       SHORT G_M3790_IG14
        mov      rdi, r15
        mov      rsi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
        call     [rax]System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
 						;; size=101 bbWeight=0.50 PerfScore 14.38
 G_M3790_IG14:
-       lea      rsi, bword ptr [rbx+0x98]
-       mov      bword ptr [rbp-0x68], rsi
        mov      rdi, rbx
-       mov      rsi, r14
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x68]
-       mov      rdi, rbx
-       mov      edx, 256
-       call     rax
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:Deserialize(int):this
        mov      rbx, gword ptr [rbx+0x98]
        test     rbx, rbx
        je       SHORT G_M3790_IG16
-						;; size=65 bbWeight=1 PerfScore 13.25
+						;; size=32 bbWeight=1 PerfScore 7.00
 G_M3790_IG15:
        cmp      qword ptr [rbx+0x28], 0
        jle      SHORT G_M3790_IG16
        mov      r14, qword ptr [rbx+0x20]
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      rdi, gword ptr [rbp-0x58]
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ThrowIfDisposed():this
-       mov      rdi, gword ptr [rbp-0x60]
+       mov      rdi, gword ptr [rbp-0x58]
        mov      rsi, r14
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:SetPosition(long):this
        mov      esi, dword ptr [rbx+0x28]
-       lea      rcx, [rbp-0x58]
-       mov      rdi, gword ptr [rbp-0x60]
+       lea      rcx, [rbp-0x50]
+       mov      rdi, gword ptr [rbp-0x58]
        xor      edx, edx
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:ReadBuffers(int,bool,byref):System.ArraySegment`1[byte][]:this
        test     rax, rax
        je       SHORT G_M3790_IG16
        cmp      dword ptr [rax+0x08], 0
        je       SHORT G_M3790_IG16
        mov      rdi, r15
        mov      rsi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
        call     [rax]System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:AddRange(System.Collections.Generic.IEnumerable`1[System.ArraySegment`1[byte]]):this
 						;; size=100 bbWeight=0.50 PerfScore 14.38
 G_M3790_IG16:
        mov      rdi, 0xD1FFAB1E      ; Microsoft.Azure.Amqp.BufferListStream
        call     CORINFO_HELP_NEWSFAST
        mov      rbx, rax
        mov      rdi, r15
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:ToArray():System.ArraySegment`1[byte][]:this
        call     [rax]System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:ToArray():System.ArraySegment`1[byte][]:this
        mov      rsi, rax
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:.ctor(System.Collections.Generic.IList`1[System.ArraySegment`1[byte]]):this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:.ctor(System.Collections.Generic.IList`1[System.ArraySegment`1[byte]]):this
        jmp      SHORT G_M3790_IG18
 						;; size=53 bbWeight=1 PerfScore 10.75
 G_M3790_IG17:
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.List`1[System.ArraySegment`1[byte]]
        mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_GET_GCSTATIC_BASE
        call     [rax]CORINFO_HELP_GET_GCSTATIC_BASE
        jmp      G_M3790_IG04
 						;; size=27 bbWeight=0 PerfScore 0.00
 G_M3790_IG18:
-       mov      r14, gword ptr [rbp-0x60]
+       mov      r14, gword ptr [rbp-0x58]
        cmp      byte  ptr [r14+0x30], 0
        jne      SHORT G_M3790_IG19
        xor      rdi, rdi
        mov      gword ptr [r14+0x10], rdi
        mov      byte  ptr [r14+0x30], 1
 						;; size=22 bbWeight=0.50 PerfScore 3.12
 G_M3790_IG19:
        mov      rdi, qword ptr [r14]
        test     dword ptr [rdi], 0xD1FFAB1E
        je       SHORT G_M3790_IG20
        mov      rdi, r14
        call     System.GC:SuppressFinalizeInternal(System.Object)
 						;; size=19 bbWeight=0.50 PerfScore 3.12
 G_M3790_IG20:
        mov      rax, rbx
 						;; size=3 bbWeight=1 PerfScore 0.25
 G_M3790_IG21:
-       add      rsp, 72
+       add      rsp, 64
        pop      rbx
-       pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=15 bbWeight=1 PerfScore 4.25
+						;; size=13 bbWeight=1 PerfScore 3.75
 G_M3790_IG22:
        push     rax
 						;; size=1 bbWeight=0 PerfScore 0.00
 G_M3790_IG23:
-       mov      r14, gword ptr [rbp-0x60]
+       mov      r14, gword ptr [rbp-0x58]
        cmp      byte  ptr [r14+0x30], 0
        jne      SHORT G_M3790_IG24
        xor      rdi, rdi
        mov      gword ptr [r14+0x10], rdi
        mov      byte  ptr [r14+0x30], 1
 						;; size=22 bbWeight=0 PerfScore 0.00
 G_M3790_IG24:
        mov      rbx, qword ptr [r14]
        test     dword ptr [rbx], 0xD1FFAB1E
        je       SHORT G_M3790_IG25
        mov      rdi, r14
        call     System.GC:SuppressFinalizeInternal(System.Object)
 						;; size=19 bbWeight=0 PerfScore 0.00
 G_M3790_IG25:
        nop      
 						;; size=1 bbWeight=0 PerfScore 0.00
 G_M3790_IG26:
        add      rsp, 8
        ret      
 						;; size=5 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 1374, prolog size 47, PerfScore 228.83, instruction count 322, allocated bytes for code 1374 (MethodHash=5e55f131) for method Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:GetNonBodySectionsStream():System.IO.Stream:this (FullOpts)
+; Total bytes of code 1158, prolog size 35, PerfScore 187.33, instruction count 274, allocated bytes for code 1158 (MethodHash=5e55f131) for method Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessage:GetNonBodySectionsStream():System.IO.Stream:this (FullOpts)
 ; ============================================================

-212 (-29.90 % of base) - Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(System.Xml.XmlWriter):long:this

 ; Assembly listing for method Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(System.Xml.XmlWriter):long:this (FullOpts)
 ; Emitting BLENDED_CODE for x64 + VEX + EVEX on Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 10 single block inlinees; 3 inlinees without PGO data
+; 0 inlinees with PGO data; 16 single block inlinees; 3 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T00] ( 28, 28   )     ref  ->  rbx         this class-hnd single-def <Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader>
+;  V00 this         [V00,T01] ( 16, 16   )     ref  ->  rbx         this class-hnd single-def <Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader>
 ;  V01 arg1         [V01,T02] (  8,  8   )     ref  ->  r15         class-hnd single-def <System.Xml.XmlWriter>
-;  V02 loc0         [V02,T12] (  6,  0   )     ref  ->  [rbp-0x30]  class-hnd exact EH-live single-def <Microsoft.Azure.Amqp.BufferListStream>
-;  V03 loc1         [V03,T11] (  2,  2   )    long  ->  r12         single-def
+;  V02 loc0         [V02,T11] (  6,  0   )     ref  ->  [rbp-0x28]  class-hnd exact EH-live single-def <Microsoft.Azure.Amqp.BufferListStream>
+;  V03 loc1         [V03,T10] (  2,  2   )    long  ->  r13         single-def
 ;# V04 OutArgs      [V04    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <Empty>
-;  V05 tmp1         [V05,T01] ( 14, 25   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <Microsoft.Azure.Amqp.BufferListStream>
-;  V06 tmp2         [V06,T06] (  2,  4   )    long  ->  r12         "impAppendStmt"
-;  V07 tmp3         [V07,T07] (  2,  4   )    long  ->  r12         "impAppendStmt"
-;  V08 tmp4         [V08,T08] (  2,  4   )    long  ->  r12         "impAppendStmt"
-;  V09 tmp5         [V09,T09] (  2,  4   )    long  ->  r12         "impAppendStmt"
-;  V10 tmp6         [V10,T10] (  2,  4   )    long  ->  r12         "impAppendStmt"
-;  V11 tmp7         [V11,T04] (  4,  4   )   byref  ->  registers   "Inlining Arg"
-;  V12 tmp8         [V12,T05] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
-;  V13 cse0         [V13,T03] (  7,  7   )    long  ->  r13         "CSE #01: aggressive"
-;  TEMP_01                                   byref  ->  [rbp-0x38]
+;  V05 tmp1         [V05,T00] ( 14, 25   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <Microsoft.Azure.Amqp.BufferListStream>
+;  V06 tmp2         [V06,T05] (  2,  4   )    long  ->  r13         "impAppendStmt"
+;  V07 tmp3         [V07,T06] (  2,  4   )    long  ->  r13         "impAppendStmt"
+;  V08 tmp4         [V08,T07] (  2,  4   )    long  ->  r13         "impAppendStmt"
+;  V09 tmp5         [V09,T08] (  2,  4   )    long  ->  r13         "impAppendStmt"
+;  V10 tmp6         [V10,T09] (  2,  4   )    long  ->  r13         "impAppendStmt"
+;  V11 tmp7         [V11,T03] (  4,  4   )   byref  ->  registers   "Inlining Arg"
+;  V12 tmp8         [V12,T04] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
 ;
-; Lcl frame size = 24
+; Lcl frame size = 16
 
 G_M60316_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
-       push     r12
        push     rbx
-       sub      rsp, 24
-       lea      rbp, [rsp+0x40]
-       xor      eax, eax
-       mov      qword ptr [rbp-0x38], rax
+       sub      rsp, 16
+       lea      rbp, [rsp+0x30]
        mov      rbx, rdi
        mov      r15, rsi
-						;; size=31 bbWeight=1 PerfScore 8.50
+						;; size=23 bbWeight=1 PerfScore 6.25
 G_M60316_IG02:
        mov      rdi, rbx
        mov      esi, 511
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
        cmp      dword ptr [rdi], edi
        call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
        mov      rdi, 0xD1FFAB1E      ; Microsoft.Azure.Amqp.BufferListStream
        call     CORINFO_HELP_NEWSFAST
        mov      r14, rax
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Encode(Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader):System.Collections.Generic.List`1[System.ArraySegment`1[byte]]
        call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Encode(Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader):System.Collections.Generic.List`1[System.ArraySegment`1[byte]]
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:ToArray():System.ArraySegment`1[byte][]:this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Collections.Generic.List`1[System.ArraySegment`1[byte]]:ToArray():System.ArraySegment`1[byte][]:this
        mov      rsi, rax
        mov      rdi, r14
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.BufferListStream:.ctor(System.Collections.Generic.IList`1[System.ArraySegment`1[byte]]):this
        call     [rax]Microsoft.Azure.Amqp.BufferListStream:.ctor(System.Collections.Generic.IList`1[System.ArraySegment`1[byte]]):this
-       mov      gword ptr [rbp-0x30], r14
+       mov      gword ptr [rbp-0x28], r14
 						;; size=94 bbWeight=1 PerfScore 21.00
 G_M60316_IG03:
-       lea      rsi, bword ptr [rbx+0x70]
-       mov      bword ptr [rbp-0x38], rsi
        mov      rdi, rbx
-       mov      r13, 0xD1FFAB1E      ; Microsoft.Azure.Amqp.AmqpMessage
-       mov      rsi, r13
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x38]
-       mov      rdi, rbx
-       mov      edx, 1
-       call     rax
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
        mov      rdx, gword ptr [rbx+0x70]
        mov      rdi, r14
        mov      rsi, r15
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
        call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
-       mov      r12, rax
-       lea      rsi, bword ptr [rbx+0x78]
-       mov      bword ptr [rbp-0x38], rsi
+       mov      r13, rax
        mov      rdi, rbx
-       mov      rsi, r13
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x38]
-       mov      rdi, rbx
-       mov      edx, 2
-       call     rax
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
        mov      rdx, gword ptr [rbx+0x78]
        mov      rdi, r14
        mov      rsi, r15
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
        call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
-       add      r12, rax
-       lea      rsi, bword ptr [rbx+0x80]
-       mov      bword ptr [rbp-0x38], rsi
+       add      r13, rax
        mov      rdi, rbx
-       mov      rsi, r13
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x38]
-       mov      rdi, rbx
-       mov      edx, 4
-						;; size=211 bbWeight=1 PerfScore 39.25
-G_M60316_IG04:
-       call     rax
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
        mov      rdx, gword ptr [rbx+0x80]
        mov      rdi, r14
        mov      rsi, r15
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
        call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
-       add      r12, rax
-       lea      rsi, bword ptr [rbx+0x88]
-       mov      bword ptr [rbp-0x38], rsi
+       add      r13, rax
        mov      rdi, rbx
-       mov      rsi, r13
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x38]
-       mov      rdi, rbx
-       mov      edx, 8
-       call     rax
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
        mov      rdx, gword ptr [rbx+0x88]
        mov      rdi, r14
        mov      rsi, r15
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
        call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
-       add      r12, rax
-       lea      rsi, bword ptr [rbx+0x90]
-       mov      bword ptr [rbp-0x38], rsi
+       add      r13, rax
        mov      rdi, rbx
-       mov      rsi, r13
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x38]
-       mov      rdi, rbx
-       mov      edx, 16
-       call     rax
+						;; size=189 bbWeight=1 PerfScore 39.25
+G_M60316_IG04:
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
        mov      rdx, gword ptr [rbx+0x90]
        mov      rdi, r14
        mov      rsi, r15
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
        call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
-       add      r12, rax
-       lea      rsi, bword ptr [rbx+0x98]
-       mov      bword ptr [rbp-0x38], rsi
-						;; size=203 bbWeight=1 PerfScore 42.50
-G_M60316_IG05:
+       add      r13, rax
        mov      rdi, rbx
-       mov      rsi, r13
-       mov      rdx, 0xD1FFAB1E      ; token handle
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_VIRTUAL_FUNC_PTR
-       call     [rax]CORINFO_HELP_VIRTUAL_FUNC_PTR
-       mov      rsi, bword ptr [rbp-0x38]
-       mov      rdi, rbx
-       mov      edx, 256
-       call     rax
+       mov      esi, 511
+       mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
+       call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Deserialize(int):this
        mov      rdx, gword ptr [rbx+0x98]
        mov      rdi, r14
        mov      rsi, r15
        mov      rax, 0xD1FFAB1E      ; code for Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
        call     [rax]Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(Microsoft.Azure.Amqp.BufferListStream,System.Xml.XmlWriter,Microsoft.Azure.Amqp.Framing.AmqpDescribed):long
-       add      r12, rax
-						;; size=70 bbWeight=1 PerfScore 14.50
-G_M60316_IG06:
+       add      r13, rax
+						;; size=93 bbWeight=1 PerfScore 19.25
+G_M60316_IG05:
        cmp      byte  ptr [r14+0x30], 0
-       jne      SHORT G_M60316_IG08
+       jne      SHORT G_M60316_IG07
 						;; size=7 bbWeight=1 PerfScore 3.00
-G_M60316_IG07:
+G_M60316_IG06:
        xor      rdi, rdi
        mov      gword ptr [r14+0x10], rdi
        mov      byte  ptr [r14+0x30], 1
 						;; size=11 bbWeight=0.50 PerfScore 1.12
-G_M60316_IG08:
+G_M60316_IG07:
        mov      rdi, qword ptr [r14]
        test     dword ptr [rdi], 0xD1FFAB1E
-       je       SHORT G_M60316_IG10
+       je       SHORT G_M60316_IG09
 						;; size=11 bbWeight=1 PerfScore 5.00
-G_M60316_IG09:
+G_M60316_IG08:
        mov      rdi, r14
        call     System.GC:SuppressFinalizeInternal(System.Object)
 						;; size=8 bbWeight=0.50 PerfScore 0.62
-G_M60316_IG10:
-       mov      rax, r12
+G_M60316_IG09:
+       mov      rax, r13
 						;; size=3 bbWeight=1 PerfScore 0.25
-G_M60316_IG11:
-       add      rsp, 24
+G_M60316_IG10:
+       add      rsp, 16
        pop      rbx
-       pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=15 bbWeight=1 PerfScore 4.25
-G_M60316_IG12:
+						;; size=13 bbWeight=1 PerfScore 3.75
+G_M60316_IG11:
        push     rax
 						;; size=1 bbWeight=0 PerfScore 0.00
-G_M60316_IG13:
-       mov      rdi, gword ptr [rbp-0x30]
+G_M60316_IG12:
+       mov      rdi, gword ptr [rbp-0x28]
        cmp      byte  ptr [rdi+0x30], 0
-       jne      SHORT G_M60316_IG14
+       jne      SHORT G_M60316_IG13
        xor      rax, rax
        mov      gword ptr [rdi+0x10], rax
        mov      byte  ptr [rdi+0x30], 1
 						;; size=20 bbWeight=0 PerfScore 0.00
-G_M60316_IG14:
-       mov      r12, qword ptr [rdi]
-       test     dword ptr [r12], 0xD1FFAB1E
-       je       SHORT G_M60316_IG15
+G_M60316_IG13:
+       mov      r13, qword ptr [rdi]
+       test     dword ptr [r13], 0xD1FFAB1E
+       je       SHORT G_M60316_IG14
        call     System.GC:SuppressFinalizeInternal(System.Object)
 						;; size=18 bbWeight=0 PerfScore 0.00
-G_M60316_IG15:
+G_M60316_IG14:
        nop      
 						;; size=1 bbWeight=0 PerfScore 0.00
-G_M60316_IG16:
+G_M60316_IG15:
        add      rsp, 8
        ret      
 						;; size=5 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 709, prolog size 31, PerfScore 140.00, instruction count 168, allocated bytes for code 709 (MethodHash=0ea41463) for method Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(System.Xml.XmlWriter):long:this (FullOpts)
+; Total bytes of code 497, prolog size 23, PerfScore 99.50, instruction count 121, allocated bytes for code 497 (MethodHash=0ea41463) for method Microsoft.Azure.Amqp.AmqpMessage+AmqpStreamMessageHeader:Write(System.Xml.XmlWriter):long:this (FullOpts)
 ; ============================================================

Larger list of diffs: https://gist.github.com/MihuBot/63bb7024ae4e7690e86d7f18a101edef

[MihuBot]

@hez2010