[JitDiff X64] [MihaZupan] JIT: Use faster mod for uint16 values

[MihuBot]

Job completed in 3 minutes 27 seconds (remote runner delay: 0 seconds).
dotnet/runtime#128509

Main commit: dotnet/runtime@c57d5a1
PR commit: MihaZupan/runtime@d7d304f

Diffs

Found 86 files with textual diffs.

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 46446783
Total bytes of diff: 46446680
Total bytes of delta: -103 (-0.00 % of base)
Total relative delta: -0.09
    diff is an improvement.
    relative diff is an improvement.


Top file improvements (bytes):
         -46 : System.Private.CoreLib.dasm (-0.00 % of base)
         -30 : System.Runtime.Numerics.dasm (-0.02 % of base)
         -27 : System.Text.Encoding.CodePages.dasm (-0.04 % of base)

3 total files with Code Size differences (3 improved, 0 regressed), 257 unchanged.

Top method improvements (bytes):
         -27 (-1.19 % of base) : System.Text.Encoding.CodePages.dasm - System.Text.GB18030Encoding:GetBytes(ptr,int,ptr,int,System.Text.EncoderNLS):int:this (FullOpts)
         -26 (-1.87 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:TryGetBytes(int,System.Span`1[byte],bool,bool,byref):byte[]:this (FullOpts)
         -18 (-1.17 % of base) : System.Private.CoreLib.dasm - System.Globalization.DateTimeFormatInfo:Tokenize(int,byref,byref,byref):bool:this (FullOpts)
         -13 (-0.53 % of base) : System.Private.CoreLib.dasm - System.Number:FormatFloatingPointAsHex[double,byte](byref,double,char,int,System.Globalization.NumberFormatInfo) (FullOpts)
         -11 (-1.12 % of base) : System.Private.CoreLib.dasm - System.Globalization.DateTimeFormatInfo:InsertHash(System.Globalization.DateTimeFormatInfo+TokenHashValue[],System.String,int,int):this (FullOpts)
          -4 (-0.81 % of base) : System.Private.CoreLib.dasm - System.Diagnostics.Tracing.EventSource:SendManifest(byte[]):this (FullOpts)
          -1 (-0.58 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:GetBitLength():long:this (FullOpts)
          -1 (-0.56 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:Log2(System.Numerics.BigInteger):System.Numerics.BigInteger (FullOpts)
          -1 (-0.32 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:PopCount(System.Numerics.BigInteger):System.Numerics.BigInteger (FullOpts)
          -1 (-0.54 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:TrailingZeroCount(System.Numerics.BigInteger):System.Numerics.BigInteger (FullOpts)

Top method improvements (percentages):
         -26 (-1.87 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:TryGetBytes(int,System.Span`1[byte],bool,bool,byref):byte[]:this (FullOpts)
         -27 (-1.19 % of base) : System.Text.Encoding.CodePages.dasm - System.Text.GB18030Encoding:GetBytes(ptr,int,ptr,int,System.Text.EncoderNLS):int:this (FullOpts)
         -18 (-1.17 % of base) : System.Private.CoreLib.dasm - System.Globalization.DateTimeFormatInfo:Tokenize(int,byref,byref,byref):bool:this (FullOpts)
         -11 (-1.12 % of base) : System.Private.CoreLib.dasm - System.Globalization.DateTimeFormatInfo:InsertHash(System.Globalization.DateTimeFormatInfo+TokenHashValue[],System.String,int,int):this (FullOpts)
          -4 (-0.81 % of base) : System.Private.CoreLib.dasm - System.Diagnostics.Tracing.EventSource:SendManifest(byte[]):this (FullOpts)
          -1 (-0.58 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:GetBitLength():long:this (FullOpts)
          -1 (-0.56 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:Log2(System.Numerics.BigInteger):System.Numerics.BigInteger (FullOpts)
          -1 (-0.54 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:TrailingZeroCount(System.Numerics.BigInteger):System.Numerics.BigInteger (FullOpts)
         -13 (-0.53 % of base) : System.Private.CoreLib.dasm - System.Number:FormatFloatingPointAsHex[double,byte](byref,double,char,int,System.Globalization.NumberFormatInfo) (FullOpts)
          -1 (-0.32 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:PopCount(System.Numerics.BigInteger):System.Numerics.BigInteger (FullOpts)

10 total methods with Code Size differences (10 improved, 0 regressed), 288461 unchanged.

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

Artifacts:

• diff-frameworks.txt (4 KB)
• ShortDiffsImprovements.md (59 KB)
• LongDiffsImprovements.md (261 KB)
• jit-diffs-pr.zip (159 MB)
• jit-diffs-main.zip (159 MB)

[MihuBot]

Top method improvements

-27 (-1.19 % of base) - System.Text.GB18030Encoding:GetBytes(ptr,int,ptr,int,System.Text.EncoderNLS):int:this

 ; Assembly listing for method System.Text.GB18030Encoding:GetBytes(ptr,int,ptr,int,System.Text.EncoderNLS):int:this (FullOpts)
 ; Emitting BLENDED_CODE for x64 + VEX + EVEX on Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 13 single block inlinees; 31 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T27] (  5,  7   )     ref  ->  r15         this class-hnd single-def <System.Text.GB18030Encoding>
 ;  V01 arg1         [V01,T66] (  3,  3   )    long  ->  r13         single-def
 ;  V02 arg2         [V02,T67] (  3,  3   )     int  ->  r12         single-def
 ;  V03 arg3         [V03,T65] (  4,  3.50)    long  ->  r14         single-def
 ;  V04 arg4         [V04,T68] (  3,  3   )     int  ->  [rbp-0x2C]  single-def
 ;  V05 arg5         [V05,T09] ( 10, 12.50)     ref  ->  rbx         class-hnd single-def <System.Text.EncoderNLS>
 ;  V06 loc0         [V06,T07] ( 12, 20   )  ushort  ->  [rbp-0x30] 
 ;  V07 loc1         [V07,T00] (180,362.50)     ref  ->  r13         class-hnd exact single-def <System.Text.EncodingByteBuffer>
 ;* V08 loc2         [V08    ] (  0,  0   )  ushort  ->  zero-ref   
 ;  V09 loc3         [V09,T06] ( 12, 24   )     int  ->  registers  
 ;  V10 loc4         [V10,T69] (  2,  4   )   ubyte  ->  rdi        
 ;  V11 loc5         [V11,T70] (  2,  4   )   ubyte  ->  rcx        
 ;  V12 loc6         [V12,T71] (  2,  4   )   ubyte  ->  rdx        
-;  V13 loc7         [V13,T02] ( 16, 32   )  ushort  ->  rax        
+;  V13 loc7         [V13,T05] ( 13, 26   )  ushort  ->  rax        
 ;  V14 loc8         [V14,T72] (  2,  4   )   ubyte  ->  rdi        
 ;  V15 loc9         [V15,T73] (  2,  4   )   ubyte  ->  rcx        
 ;  V16 loc10        [V16,T74] (  2,  4   )   ubyte  ->  rdx        
 ;  V17 OutArgs      [V17    ] (  1,  1   )  struct ( 8) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <UNNAMED>
 ;  V18 tmp1         [V18,T36] (  3,  6   )     ref  ->  [rbp-0x38]  class-hnd exact spill-single-def "NewObj constructor temp" <System.Text.EncodingByteBuffer>
-;  V19 tmp2         [V19,T05] ( 14, 28   )  ushort  ->  rsi         "Inline stloc first use temp"
+;  V19 tmp2         [V19,T04] ( 14, 28   )  ushort  ->  rsi         "Inline stloc first use temp"
 ;  V20 tmp3         [V20,T37] (  3,  6   )    long  ->  rdi         "Inline stloc first use temp"
 ;  V21 tmp4         [V21,T08] (  4, 16   )   byref  ->  r12         "Inlining Arg"
 ;  V22 tmp5         [V22,T28] (  4,  8   )  ushort  ->  rsi         "Inline stloc first use temp"
 ;  V23 tmp6         [V23,T75] (  2,  4   )   ubyte  ->  rax         "Inline return value spill temp"
 ;* V24 tmp7         [V24    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V25 tmp8         [V25    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V26 tmp9         [V26,T38] (  3,  6   )    long  ->  rax         "Inline stloc first use temp"
 ;* V27 tmp10        [V27    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V28 tmp11        [V28    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V29 tmp12        [V29,T39] (  3,  6   )    long  ->  rax         "Inline stloc first use temp"
 ;* V30 tmp13        [V30    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V31 tmp14        [V31,T40] (  3,  6   )    long  ->  rax         "Inline stloc first use temp"
 ;  V32 tmp15        [V32,T41] (  3,  6   )   ubyte  ->  rax         "Inline return value spill temp"
 ;  V33 tmp16        [V33,T42] (  3,  6   )    long  ->  rax         "Inline stloc first use temp"
 ;* V34 tmp17        [V34    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V35 tmp18        [V35    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V36 tmp19        [V36,T43] (  3,  6   )    long  ->  rdi         "Inline stloc first use temp"
 ;* V37 tmp20        [V37    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V38 tmp21        [V38,T78] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V39 tmp22        [V39,T44] (  3,  6   )   ubyte  ->  rdi         "Inline stloc first use temp"
 ;  V40 tmp23        [V40,T76] (  2,  4   )   ubyte  ->  rax         "Inline return value spill temp"
 ;* V41 tmp24        [V41    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V42 tmp25        [V42    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V43 tmp26        [V43,T45] (  3,  6   )    long  ->  rsi         "Inline stloc first use temp"
 ;* V44 tmp27        [V44    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V45 tmp28        [V45    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V46 tmp29        [V46,T46] (  3,  6   )    long  ->  rax         "Inline stloc first use temp"
 ;* V47 tmp30        [V47    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V48 tmp31        [V48,T47] (  3,  6   )    long  ->  rax         "Inline stloc first use temp"
 ;  V49 tmp32        [V49,T48] (  3,  6   )   ubyte  ->  rax         "Inline return value spill temp"
 ;  V50 tmp33        [V50,T49] (  3,  6   )    long  ->  rax         "Inline stloc first use temp"
 ;* V51 tmp34        [V51    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V52 tmp35        [V52    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;  V53 tmp36        [V53,T77] (  2,  4   )   ubyte  ->  rax         "Inline return value spill temp"
 ;* V54 tmp37        [V54    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V55 tmp38        [V55    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V56 tmp39        [V56    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V57 tmp40        [V57,T50] (  3,  6   )    long  ->  rdi         "Inline stloc first use temp"
 ;* V58 tmp41        [V58    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;  V59 tmp42        [V59,T51] (  3,  6   )   ubyte  ->  rax         "Inline return value spill temp"
 ;  V60 tmp43        [V60,T52] (  3,  6   )    long  ->  rdi         "Inline stloc first use temp"
 ;* V61 tmp44        [V61    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
 ;* V62 tmp45        [V62,T79] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V63 tmp46        [V63,T01] (  3, 48   )     ref  ->  rdi         "argument with side effect"
 ;  V64 tmp47        [V64,T10] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V65 tmp48        [V65,T11] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V66 tmp49        [V66,T12] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V67 tmp50        [V67,T13] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V68 tmp51        [V68,T14] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V69 tmp52        [V69,T15] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V70 tmp53        [V70,T16] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V71 tmp54        [V71,T17] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V72 tmp55        [V72,T18] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V73 tmp56        [V73,T19] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V74 tmp57        [V74,T20] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V75 tmp58        [V75,T21] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V76 tmp59        [V76,T22] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V77 tmp60        [V77,T23] (  3, 12   )     ref  ->  rdi         "argument with side effect"
 ;  V78 cse0         [V78,T53] (  3,  6   )     int  ->  rax         "CSE #04: conservative"
 ;  V79 cse1         [V79,T54] (  3,  6   )     int  ->  rax         "CSE #05: conservative"
 ;  V80 cse2         [V80,T55] (  3,  6   )     int  ->  rax         "CSE #06: conservative"
-;  V81 cse3         [V81,T03] ( 16, 32   )    long  ->  registers   multi-def "CSE #07: aggressive"
-;  V82 cse4         [V82,T04] ( 15, 30   )    long  ->  rdi         multi-def "CSE #02: aggressive"
+;  V81 cse3         [V81,T02] ( 16, 32   )    long  ->  registers   multi-def "CSE #07: aggressive"
+;  V82 cse4         [V82,T03] ( 15, 30   )    long  ->  rdi         multi-def "CSE #02: aggressive"
 ;  V83 cse5         [V83,T29] (  4,  8   )    long  ->  rax         "CSE #15: moderate"
 ;  V84 cse6         [V84,T30] (  4,  8   )    long  ->  rax         "CSE #17: moderate"
 ;  V85 cse7         [V85,T31] (  4,  8   )    long  ->  rax         "CSE #19: moderate"
 ;  V86 cse8         [V86,T32] (  4,  8   )    long  ->  rax         "CSE #27: moderate"
 ;  V87 cse9         [V87,T33] (  4,  8   )    long  ->  rax         "CSE #29: moderate"
 ;  V88 cse10        [V88,T34] (  4,  8   )    long  ->  rax         "CSE #31: moderate"
 ;  V89 cse11        [V89,T35] (  4,  8   )    long  ->  rdi         "CSE #33: moderate"
 ;  V90 cse12        [V90,T56] (  3,  6   )    long  ->  rdi         "CSE #01: conservative"
 ;  V91 cse13        [V91,T57] (  3,  6   )    long  ->  rdi         "CSE #16: conservative"
 ;  V92 cse14        [V92,T58] (  3,  6   )    long  ->  rdi         "CSE #18: conservative"
 ;  V93 cse15        [V93,T59] (  3,  6   )    long  ->  rdi         "CSE #20: conservative"
 ;  V94 cse16        [V94,T60] (  3,  6   )    long  ->  rdi         "CSE #21: conservative"
 ;  V95 cse17        [V95,T61] (  3,  6   )    long  ->  rdi         "CSE #28: conservative"
 ;  V96 cse18        [V96,T62] (  3,  6   )    long  ->  rdi         "CSE #30: conservative"
 ;  V97 cse19        [V97,T63] (  3,  6   )    long  ->  rdi         "CSE #32: conservative"
 ;  V98 cse20        [V98,T64] (  3,  6   )    long  ->  rdi         "CSE #34: conservative"
 ;  V99 rat0         [V99,T24] (  3, 12   )     int  ->  rdx         "ReplaceWithLclVar is creating a new local variable"
 ;  V100 rat1        [V100,T25] (  3, 12   )     int  ->  rdx         "ReplaceWithLclVar is creating a new local variable"
 ;  V101 rat2        [V101,T26] (  3, 12   )     int  ->  rdx         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 24
 
 G_M9474_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     r12
        push     rbx
        sub      rsp, 24
        lea      rbp, [rsp+0x40]
        mov      dword ptr [rbp-0x2C], r8d
        mov      r15, rdi
        mov      r13, rsi
        mov      r12d, edx
        mov      r14, rcx
        mov      rbx, r9
 						;; size=38 bbWeight=1 PerfScore 9.00
 G_M9474_IG02:
        xor      ecx, ecx
        test     rbx, rbx
        mov      dword ptr [rbp-0x30], ecx
        je       SHORT G_M9474_IG04
 						;; size=10 bbWeight=1 PerfScore 2.50
 G_M9474_IG03:
        movzx    rcx, word  ptr [rbx+0x34]
        mov      dword ptr [rbp-0x30], ecx
 						;; size=7 bbWeight=0.50 PerfScore 1.50
 G_M9474_IG04:
        mov      rdi, 0xD1FFAB1E      ; System.Text.EncodingByteBuffer
        call     CORINFO_HELP_NEWSFAST
        mov      gword ptr [rbp-0x38], rax
        mov      dword ptr [rsp], r12d
        mov      rdi, rax
        mov      rsi, r15
        mov      rdx, rbx
        mov      rcx, r14
        mov      r8d, dword ptr [rbp-0x2C]
        mov      r9, r13
        mov      r10, 0xD1FFAB1E      ; code for System.Text.EncodingByteBuffer:.ctor(System.Text.EncodingNLS,System.Text.EncoderNLS,ptr,int,ptr,int):this
        call     [r10]System.Text.EncodingByteBuffer:.ctor(System.Text.EncodingNLS,System.Text.EncoderNLS,ptr,int,ptr,int):this
        mov      r13, gword ptr [rbp-0x38]
        jmp      G_M9474_IG20
 						;; size=64 bbWeight=1 PerfScore 11.75
 G_M9474_IG05:
        mov      rdi, qword ptr [r13+0x20]
        test     rdi, rdi
        je       SHORT G_M9474_IG06
        mov      rcx, qword ptr [r13+0x30]
        dec      rcx
        cmp      rdi, rcx
        jae      G_M9474_IG13
        lea      rcx, [rdi+0x01]
        mov      qword ptr [r13+0x20], rcx
        mov      ecx, eax
        sar      ecx, 8
        mov      byte  ptr [rdi], cl
 						;; size=40 bbWeight=2 PerfScore 20.00
 G_M9474_IG06:
        inc      dword ptr [r13+0x50]
        mov      rdi, qword ptr [r13+0x20]
        test     rdi, rdi
        je       SHORT G_M9474_IG07
        cmp      rdi, qword ptr [r13+0x30]
        jae      SHORT G_M9474_IG08
        lea      rcx, [rdi+0x01]
        mov      qword ptr [r13+0x20], rcx
        mov      byte  ptr [rdi], al
 						;; size=29 bbWeight=2 PerfScore 23.50
 G_M9474_IG07:
        inc      dword ptr [r13+0x50]
        mov      eax, 1
        jmp      SHORT G_M9474_IG11
 						;; size=11 bbWeight=2 PerfScore 10.50
 G_M9474_IG08:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG09
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG10
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG10
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG09:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG10:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        xor      eax, eax
 						;; size=38 bbWeight=2 PerfScore 28.50
 G_M9474_IG11:
        test     eax, eax
        je       SHORT G_M9474_IG16
 						;; size=4 bbWeight=2 PerfScore 2.50
 G_M9474_IG12:
        mov      dword ptr [rbp-0x30], r12d
        jmp      G_M9474_IG20
 						;; size=9 bbWeight=1 PerfScore 3.00
 G_M9474_IG13:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG14
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG15
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG15
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG14:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG15:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
 						;; size=36 bbWeight=2 PerfScore 28.00
 G_M9474_IG16:
        test     rbx, rbx
        je       SHORT G_M9474_IG18
 						;; size=5 bbWeight=4 PerfScore 5.00
 G_M9474_IG17:
        cmp      byte  ptr [rbx+0x36], 0
        je       G_M9474_IG77
 						;; size=10 bbWeight=2 PerfScore 6.00
 G_M9474_IG18:
        test     r12d, r12d
        je       G_M9474_IG76
        lea      rdi, bword ptr [r13+0x58]
        lea      rdx, bword ptr [r13+0x38]
        mov      esi, r12d
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncoderFallbackBufferHelper:InternalFallback(char,byref):bool:this
        call     [rax]System.Text.EncoderFallbackBufferHelper:InternalFallback(char,byref):bool:this
 						;; size=32 bbWeight=2 PerfScore 11.50
 G_M9474_IG19:
        xor      r12d, r12d
        mov      dword ptr [rbp-0x30], r12d
 						;; size=7 bbWeight=2 PerfScore 2.50
 G_M9474_IG20:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x48]
        call     [rax]System.Text.EncoderFallbackBuffer:get_Remaining():int:this
        test     eax, eax
        jg       SHORT G_M9474_IG22
 						;; size=17 bbWeight=8 PerfScore 82.00
 G_M9474_IG21:
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x48]
        jae      G_M9474_IG75
 						;; size=14 bbWeight=2 PerfScore 10.00
 G_M9474_IG22:
        lea      r12, bword ptr [r13+0x58]
        mov      rdi, gword ptr [r12+0x08]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x30]System.Text.EncoderFallbackBuffer:GetNextChar():char:this
        mov      esi, eax
        test     esi, esi
        setne    dil
        mov      byte  ptr [r12+0x26], dil
        test     esi, esi
        jne      SHORT G_M9474_IG23
        xor      edi, edi
        mov      dword ptr [r12+0x20], edi
 						;; size=43 bbWeight=2 PerfScore 28.00
 G_M9474_IG23:
        test     esi, esi
        jne      SHORT G_M9474_IG24
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x48]
        jae      SHORT G_M9474_IG24
        lea      rsi, [rdi+0x02]
        mov      qword ptr [r13+0x38], rsi
        movzx    rsi, word  ptr [rdi]
 						;; size=25 bbWeight=2 PerfScore 19.50
 G_M9474_IG24:
        mov      r12d, dword ptr [rbp-0x30]
        test     r12d, r12d
        jne      G_M9474_IG52
        cmp      esi, 127
        jle      G_M9474_IG47
        lea      edi, [rsi-0xD800]
        cmp      edi, 0x3FF
        jbe      G_M9474_IG46
        lea      edi, [rsi-0xDC00]
        cmp      edi, 0x3FF
        jbe      G_M9474_IG44
        mov      rdi, qword ptr [r15+0x70]
        mov      eax, esi
        movzx    rax, word  ptr [rdi+2*rax]
        mov      rdi, qword ptr [r15+0x90]
        mov      ecx, esi
        shr      ecx, 3
        movsxd   rcx, ecx
        movzx    rdi, byte  ptr [rdi+rcx]
        test     edi, edi
        je       G_M9474_IG05
        and      esi, 7
        bt       edi, esi
        jae      G_M9474_IG05
-       mov      edx, 0xD1FFAB1E
-       mov      edi, eax
-       imul     rdx, rdi
-       shr      rdx, 35
-       imul     edx, edx, 10
-       mov      edi, eax
-       sub      edi, edx
-       add      edi, 48
-       movzx    rdi, dil
+       imul     edx, eax, 0xD1FFAB1E
+       imul     rdx, rdx, 10
+       shr      rdx, 32
+       add      edx, 48
+       movzx    rdi, dl
        mov      edx, 0xD1FFAB1E
        imul     rdx, rax
        shr      rdx, 35
        movzx    rax, dx
-       mov      rcx, 0xD1FFAB1E
-       mov      edx, eax
-       mulx     rdx, rdx, rcx
-       imul     edx, edx, 126
-       mov      ecx, eax
-       sub      ecx, edx
-       add      ecx, 129
-       movzx    rcx, cl
+       imul     edx, eax, 0xD1FFAB1E
+       imul     rdx, rdx, 126
+       shr      rdx, 32
+       add      edx, 129
+       movzx    rcx, dl
        mov      rsi, 0xD1FFAB1E
        mov      edx, eax
        mulx     rax, rax, rsi
        movzx    rax, ax
-       mov      edx, 0xD1FFAB1E
-       mov      esi, eax
-       imul     rdx, rsi
-       shr      rdx, 35
-       imul     edx, edx, 10
-						;; size=224 bbWeight=2 PerfScore 87.00
-G_M9474_IG25:
-       mov      esi, eax
-       sub      esi, edx
-       add      esi, 48
-       movzx    rdx, sil
+       imul     edx, eax, 0xD1FFAB1E
+       imul     rdx, rdx, 10
+       shr      rdx, 32
+       add      edx, 48
+       movzx    rdx, dl
        mov      esi, 0xD1FFAB1E
        imul     rax, rsi
        shr      rax, 35
+						;; size=221 bbWeight=2 PerfScore 87.50
+G_M9474_IG25:
        movzx    rax, ax
        mov      rsi, qword ptr [r13+0x20]
        test     rsi, rsi
        je       SHORT G_M9474_IG26
        mov      r8, qword ptr [r13+0x30]
        add      r8, -3
        cmp      rsi, r8
        jae      G_M9474_IG41
        lea      r8, [rsi+0x01]
        mov      qword ptr [r13+0x20], r8
        add      eax, 129
        mov      byte  ptr [rsi], al
-						;; size=68 bbWeight=2 PerfScore 27.00
+						;; size=44 bbWeight=2 PerfScore 19.50
 G_M9474_IG26:
        inc      dword ptr [r13+0x50]
        mov      rax, qword ptr [r13+0x20]
        test     rax, rax
        je       SHORT G_M9474_IG27
        mov      rsi, qword ptr [r13+0x30]
        add      rsi, -2
        cmp      rax, rsi
        jae      G_M9474_IG38
        lea      rsi, [rax+0x01]
        mov      qword ptr [r13+0x20], rsi
        mov      byte  ptr [rax], dl
 						;; size=40 bbWeight=2 PerfScore 24.50
 G_M9474_IG27:
        inc      dword ptr [r13+0x50]
        mov      rax, qword ptr [r13+0x20]
        test     rax, rax
        je       SHORT G_M9474_IG28
        mov      rdx, qword ptr [r13+0x30]
        dec      rdx
        cmp      rax, rdx
        jae      G_M9474_IG35
        lea      rdx, [rax+0x01]
        mov      qword ptr [r13+0x20], rdx
        mov      byte  ptr [rax], cl
 						;; size=39 bbWeight=2 PerfScore 24.50
 G_M9474_IG28:
        inc      dword ptr [r13+0x50]
        mov      rax, qword ptr [r13+0x20]
        test     rax, rax
        je       SHORT G_M9474_IG29
        cmp      rax, qword ptr [r13+0x30]
        jae      SHORT G_M9474_IG30
        lea      rcx, [rax+0x01]
        mov      qword ptr [r13+0x20], rcx
        mov      byte  ptr [rax], dil
 						;; size=30 bbWeight=2 PerfScore 23.50
 G_M9474_IG29:
        inc      dword ptr [r13+0x50]
        mov      eax, 1
        jmp      SHORT G_M9474_IG33
 						;; size=11 bbWeight=2 PerfScore 10.50
 G_M9474_IG30:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG31
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG32
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG32
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG31:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG32:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        xor      eax, eax
 						;; size=38 bbWeight=2 PerfScore 28.50
 G_M9474_IG33:
        test     eax, eax
        je       G_M9474_IG16
 						;; size=8 bbWeight=2 PerfScore 2.50
 G_M9474_IG34:
        mov      dword ptr [rbp-0x30], r12d
        jmp      G_M9474_IG20
 						;; size=9 bbWeight=1 PerfScore 3.00
 G_M9474_IG35:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG36
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG37
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG37
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG36:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG37:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        jmp      G_M9474_IG16
 						;; size=41 bbWeight=2 PerfScore 32.00
 G_M9474_IG38:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG39
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG40
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG40
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG39:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG40:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        jmp      G_M9474_IG16
 						;; size=41 bbWeight=2 PerfScore 32.00
 G_M9474_IG41:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG42
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG43
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG43
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG42:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG43:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        jmp      G_M9474_IG16
 						;; size=41 bbWeight=2 PerfScore 32.00
 G_M9474_IG44:
        lea      rdi, bword ptr [r13+0x58]
        lea      rdx, bword ptr [r13+0x38]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncoderFallbackBufferHelper:InternalFallback(char,byref):bool:this
        call     [rax]System.Text.EncoderFallbackBufferHelper:InternalFallback(char,byref):bool:this
        test     eax, eax
        je       G_M9474_IG16
 						;; size=28 bbWeight=2 PerfScore 11.00
 G_M9474_IG45:
        mov      dword ptr [rbp-0x30], r12d
        jmp      G_M9474_IG20
 						;; size=9 bbWeight=1 PerfScore 3.00
 G_M9474_IG46:
        mov      r12d, esi
        mov      dword ptr [rbp-0x30], r12d
        jmp      G_M9474_IG20
 						;; size=12 bbWeight=2 PerfScore 6.50
 G_M9474_IG47:
        mov      rdi, qword ptr [r13+0x20]
        test     rdi, rdi
        je       SHORT G_M9474_IG48
        cmp      rdi, qword ptr [r13+0x30]
        jae      SHORT G_M9474_IG49
        lea      rax, [rdi+0x01]
        mov      qword ptr [r13+0x20], rax
        mov      byte  ptr [rdi], sil
 						;; size=26 bbWeight=2 PerfScore 17.50
 G_M9474_IG48:
        inc      dword ptr [r13+0x50]
        mov      dword ptr [rbp-0x30], r12d
        jmp      G_M9474_IG20
 						;; size=13 bbWeight=2 PerfScore 12.00
 G_M9474_IG49:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG50
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG51
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG51
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG50:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG51:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        jmp      G_M9474_IG16
 						;; size=41 bbWeight=2 PerfScore 32.00
 G_M9474_IG52:
        lea      eax, [rsi-0xDC00]
        cmp      eax, 0x3FF
        ja       G_M9474_IG72
        add      r12d, -0xD800
        shl      r12d, 10
        lea      edi, [r12+rsi-0xDC00]
        mov      edx, 0xD1FFAB1E
        mov      eax, edx
        imul     edx:eax, edi
        mov      eax, edx
        shr      eax, 31
        sar      edx, 2
        add      eax, edx
        lea      edx, [rax+4*rax]
        add      edx, edx
        sub      edi, edx
        add      edi, 48
        movzx    rdi, dil
        mov      ecx, eax
        mov      edx, 0xD1FFAB1E
        mov      eax, edx
        imul     edx:eax, ecx
        add      edx, ecx
        mov      eax, edx
        shr      eax, 31
        sar      edx, 6
        add      eax, edx
        imul     edx, eax, 126
        sub      ecx, edx
        add      ecx, 129
        movzx    rcx, cl
        mov      esi, eax
        mov      edx, 0xD1FFAB1E
        mov      eax, edx
        imul     edx:eax, esi
        mov      eax, edx
        shr      eax, 31
        sar      edx, 2
        add      eax, edx
        lea      edx, [rax+4*rax]
        add      edx, edx
        sub      esi, edx
        add      esi, 48
        movzx    rdx, sil
        mov      esi, eax
        xor      r12d, r12d
        mov      rax, qword ptr [r13+0x20]
        test     rax, rax
        je       SHORT G_M9474_IG53
        mov      r8, qword ptr [r13+0x30]
        add      r8, -3
        cmp      rax, r8
        jae      G_M9474_IG67
        lea      r8, [rax+0x01]
        mov      qword ptr [r13+0x20], r8
        add      esi, 144
        mov      byte  ptr [rax], sil
 						;; size=189 bbWeight=2 PerfScore 70.00
 G_M9474_IG53:
        inc      dword ptr [r13+0x50]
        mov      rax, qword ptr [r13+0x20]
        test     rax, rax
        je       SHORT G_M9474_IG54
        mov      rsi, qword ptr [r13+0x30]
        add      rsi, -2
        cmp      rax, rsi
        jae      G_M9474_IG64
        lea      rsi, [rax+0x01]
        mov      qword ptr [r13+0x20], rsi
        mov      byte  ptr [rax], dl
 						;; size=40 bbWeight=2 PerfScore 24.50
 G_M9474_IG54:
        inc      dword ptr [r13+0x50]
        mov      rax, qword ptr [r13+0x20]
        test     rax, rax
        je       SHORT G_M9474_IG55
        mov      rdx, qword ptr [r13+0x30]
        dec      rdx
        cmp      rax, rdx
        jae      G_M9474_IG61
        lea      rdx, [rax+0x01]
        mov      qword ptr [r13+0x20], rdx
        mov      byte  ptr [rax], cl
 						;; size=39 bbWeight=2 PerfScore 24.50
 G_M9474_IG55:
        inc      dword ptr [r13+0x50]
        mov      rax, qword ptr [r13+0x20]
        test     rax, rax
        je       SHORT G_M9474_IG56
        cmp      rax, qword ptr [r13+0x30]
        jae      SHORT G_M9474_IG57
        lea      rcx, [rax+0x01]
        mov      qword ptr [r13+0x20], rcx
        mov      byte  ptr [rax], dil
 						;; size=30 bbWeight=2 PerfScore 23.50
 G_M9474_IG56:
        inc      dword ptr [r13+0x50]
        mov      eax, 1
        jmp      SHORT G_M9474_IG60
 						;; size=11 bbWeight=2 PerfScore 10.50
 G_M9474_IG57:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG58
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG59
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG59
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG58:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG59:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        xor      eax, eax
 						;; size=38 bbWeight=2 PerfScore 28.50
 G_M9474_IG60:
        test     eax, eax
        jne      G_M9474_IG19
        jmp      G_M9474_IG70
 						;; size=13 bbWeight=2 PerfScore 6.50
 G_M9474_IG61:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG62
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG63
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG63
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG62:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG63:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        jmp      G_M9474_IG70
 						;; size=41 bbWeight=2 PerfScore 32.00
 G_M9474_IG64:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG65
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG66
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG66
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG65:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG66:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        jmp      SHORT G_M9474_IG70
 						;; size=38 bbWeight=2 PerfScore 32.00
 G_M9474_IG67:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG68
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG69
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG69
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG68:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG69:
        mov      rdx, qword ptr [r13+0x20]
        cmp      rdx, qword ptr [r13+0x28]
        sete     dl
        movzx    rdx, dl
        mov      rsi, gword ptr [r13+0x10]
        mov      rdi, gword ptr [r13+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Text.EncodingNLS:ThrowBytesOverflow(System.Text.EncoderNLS,bool):this
 						;; size=36 bbWeight=2 PerfScore 28.00
 G_M9474_IG70:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG71
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      G_M9474_IG16
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      G_M9474_IG16
 						;; size=34 bbWeight=2 PerfScore 22.50
 G_M9474_IG71:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
        jmp      G_M9474_IG16
 						;; size=19 bbWeight=2 PerfScore 22.00
 G_M9474_IG72:
        cmp      byte  ptr [r13+0x7E], 0
        jne      SHORT G_M9474_IG73
        mov      rdi, qword ptr [r13+0x38]
        cmp      rdi, qword ptr [r13+0x40]
        jbe      SHORT G_M9474_IG74
        add      rdi, -2
        mov      qword ptr [r13+0x38], rdi
        jmp      SHORT G_M9474_IG74
 						;; size=27 bbWeight=2 PerfScore 22.50
 G_M9474_IG73:
        mov      rdi, gword ptr [r13+0x18]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x38]System.Text.EncoderFallbackBuffer:MovePrevious():bool:this
 						;; size=14 bbWeight=2 PerfScore 18.00
 G_M9474_IG74:
        lea      rdi, bword ptr [r13+0x58]
        lea      rdx, bword ptr [r13+0x38]
        mov      esi, r12d
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncoderFallbackBufferHelper:InternalFallback(char,byref):bool:this
        call     [rax]System.Text.EncoderFallbackBufferHelper:InternalFallback(char,byref):bool:this
        test     eax, eax
        jne      G_M9474_IG19
        xor      r12d, r12d
        jmp      G_M9474_IG16
 						;; size=39 bbWeight=2 PerfScore 16.00
 G_M9474_IG75:
        mov      r12d, dword ptr [rbp-0x30]
        jmp      G_M9474_IG16
 						;; size=9 bbWeight=1 PerfScore 3.00
 G_M9474_IG76:
        test     rbx, rbx
        je       SHORT G_M9474_IG79
 						;; size=5 bbWeight=1 PerfScore 1.25
 G_M9474_IG77:
        test     r14, r14
        je       SHORT G_M9474_IG78
        mov      word  ptr [rbx+0x34], r12w
 						;; size=10 bbWeight=0.50 PerfScore 1.12
 G_M9474_IG78:
        mov      rdi, r13
        mov      rax, 0xD1FFAB1E      ; code for System.Text.EncodingByteBuffer:get_CharsUsed():int:this
        call     [rax]System.Text.EncodingByteBuffer:get_CharsUsed():int:this
        mov      dword ptr [rbx+0x30], eax
 						;; size=18 bbWeight=0.50 PerfScore 2.25
 G_M9474_IG79:
        mov      eax, dword ptr [r13+0x50]
 						;; size=4 bbWeight=1 PerfScore 2.00
 G_M9474_IG80:
        add      rsp, 24
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=1 PerfScore 4.25
 
-; Total bytes of code 2278, prolog size 19, PerfScore 1554.62, instruction count 626, allocated bytes for code 2278 (MethodHash=f0b7dafd) for method System.Text.GB18030Encoding:GetBytes(ptr,int,ptr,int,System.Text.EncoderNLS):int:this (FullOpts)
+; Total bytes of code 2251, prolog size 19, PerfScore 1547.62, instruction count 615, allocated bytes for code 2251 (MethodHash=f0b7dafd) for method System.Text.GB18030Encoding:GetBytes(ptr,int,ptr,int,System.Text.EncoderNLS):int:this (FullOpts)
 ; ============================================================

-4 (-0.81 % of base) - System.Diagnostics.Tracing.EventSource:SendManifest(byte[]):this

 ; Assembly listing for method System.Diagnostics.Tracing.EventSource:SendManifest(byte[]):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; 3 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T04] (  6, 51   )     ref  ->  rbx         this class-hnd single-def <System.Diagnostics.Tracing.EventSource>
-;  V01 arg1         [V01,T10] (  6,  4.50)     ref  ->  rsi         class-hnd single-def <byte[]>
-;  V02 loc0         [V02,T12] (  3,  1.50)    long  ->  r14        
+;  V00 this         [V00,T03] (  6, 51   )     ref  ->  rbx         this class-hnd single-def <System.Diagnostics.Tracing.EventSource>
+;  V01 arg1         [V01,T09] (  6,  4.50)     ref  ->  rsi         class-hnd single-def <byte[]>
+;  V02 loc0         [V02,T11] (  3,  1.50)    long  ->  r14        
 ;  V03 loc1         [V03    ] (  2,  1   )     ref  ->  [rbp-0x50]  do-not-enreg[] must-init pinned class-hnd ptr <byte[]>
 ;  V04 loc2         [V04    ] (  2, 16.50)  struct (16) [rbp-0x60]  do-not-enreg[XS] addr-exposed ld-addr-op <System.Diagnostics.Tracing.EventDescriptor>
 ;  V05 loc3         [V05    ] (  8, 57.50)  struct ( 8) [rbp-0x68]  do-not-enreg[XSF] addr-exposed ld-addr-op ptr <System.Diagnostics.Tracing.ManifestEnvelope>
 ;  V06 loc4         [V06,T00] (  8, 96.50)     int  ->  r15        
 ;* V07 loc5         [V07    ] (  0,  0   )    long  ->  zero-ref    ptr
-;  V08 loc6         [V08,T03] ( 10, 92.50)     int  ->  r14        
+;  V08 loc6         [V08,T02] ( 10, 92.50)     int  ->  r14        
 ;  V09 OutArgs      [V09    ] (  1,  1   )  struct (16) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <UNNAMED>
 ;  V10 tmp1         [V10    ] (  8, 82   )  struct (32) [rbp-0x48]  do-not-enreg[XSF] addr-exposed ld-addr-op ptr unsafe-buffer "stackallocLocal" <UNNAMED>
 ;* V11 tmp2         [V11    ] (  0,  0   )    long  ->  zero-ref    "dup spill"
-;  V12 tmp3         [V12,T05] (  3, 48   )     int  ->  rdi         "Inline return value spill temp"
+;  V12 tmp3         [V12,T04] (  3, 48   )     int  ->  rdi         "Inline return value spill temp"
 ;* V13 tmp4         [V13    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;* V14 tmp5         [V14    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Diagnostics.Tracing.EventSource+OverrideEventProvider>
-;  V15 tmp6         [V15,T06] (  3, 36   )     int  ->  r13         "Inline stloc first use temp"
-;  V16 tmp7         [V16,T11] (  2,  2   )    long  ->  r14         "Cast away GC"
+;  V15 tmp6         [V15,T05] (  3, 36   )     int  ->  r13         "Inline stloc first use temp"
+;  V16 tmp7         [V16,T10] (  2,  2   )    long  ->  r14         "Cast away GC"
 ;  V17 tmp8         [V17,T01] (  3, 96   )     ref  ->  rdi         "argument with side effect"
-;  V18 cse0         [V18,T09] (  3, 12   )    long  ->  rax         "CSE #02: aggressive"
-;  V19 cse1         [V19,T13] (  3,  1.50)     int  ->  r15         "CSE #01: moderate"
-;  V20 rat0         [V20,T07] (  2, 16   )    long  ->  rax         "TLS field access"
-;  V21 rat1         [V21,T08] (  2, 16   )    long  ->  rax         "TLS access"
+;  V18 cse0         [V18,T08] (  3, 12   )    long  ->  rax         "CSE #02: aggressive"
+;  V19 cse1         [V19,T12] (  3,  1.50)     int  ->  r15         "CSE #01: moderate"
+;  V20 rat0         [V20,T06] (  2, 16   )    long  ->  rax         "TLS field access"
+;  V21 rat1         [V21,T07] (  2, 16   )    long  ->  rax         "TLS access"
 ;  V22 rat2         [V22    ] (  1,  1   )    long  ->  [rbp-0x28]  do-not-enreg[X] addr-exposed "GSSecurityCookie"
-;  V23 rat3         [V23,T02] (  3, 96   )     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 96
 
 G_M39112_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     rbx
        sub      rsp, 96
        lea      rbp, [rsp+0x80]
        xor      eax, eax
        mov      qword ptr [rbp-0x50], rax
        mov      rax, 0xD1FFAB1E
        mov      qword ptr [rbp-0x28], rax
        mov      rbx, rdi
 						;; size=43 bbWeight=1 PerfScore 8.50
 G_M39112_IG02:
        test     rsi, rsi
        je       G_M39112_IG17
 						;; size=9 bbWeight=1 PerfScore 1.25
 G_M39112_IG03:
        mov      gword ptr [rbp-0x50], rsi
        mov      r15d, dword ptr [rsi+0x08]
        test     r15d, r15d
        je       SHORT G_M39112_IG04
        add      rsi, 16
        mov      r14, rsi
        jmp      SHORT G_M39112_IG05
 						;; size=22 bbWeight=0.50 PerfScore 3.38
 G_M39112_IG04:
        xor      r14d, r14d
 						;; size=3 bbWeight=0.50 PerfScore 0.12
 G_M39112_IG05:
        mov      dword ptr [rsp], 0xFFFE
        mov      rdi, 0xD1FFAB1E
        mov      qword ptr [rsp+0x08], rdi
        lea      rdi, [rbp-0x60]
        mov      esi, 0xFFFE
        mov      edx, 1
        xor      ecx, ecx
        xor      r8d, r8d
        mov      r9d, 254
        mov      rax, 0xD1FFAB1E      ; code for System.Diagnostics.Tracing.EventDescriptor:.ctor(int,byte,byte,byte,byte,int,long):this
        call     [rax]System.Diagnostics.Tracing.EventDescriptor:.ctor(int,byte,byte,byte,byte,int,long):this
        mov      qword ptr [rbp-0x68], 0xD1FFAB1E
        mov      word  ptr [rbp-0x62], 0
        lea      rax, [rbp-0x68]
        mov      qword ptr [rbp-0x48], rax
        mov      qword ptr [rbp-0x40], 8
        mov      qword ptr [rbp-0x38], r14
        xor      eax, eax
        mov      dword ptr [rbp-0x2C], eax
        mov      r14d, 0xF700
        jmp      SHORT G_M39112_IG07
 						;; size=106 bbWeight=0.50 PerfScore 8.12
 G_M39112_IG06:
        shr      r14d, 1
 						;; size=3 bbWeight=4 PerfScore 2.00
 G_M39112_IG07:
        lea      eax, [r15+r14-0x01]
        cdq      
        idiv     edx:eax, r14d
        mov      word  ptr [rbp-0x64], ax
        test     r15d, r15d
        jle      G_M39112_IG16
 						;; size=22 bbWeight=4 PerfScore 115.00
 G_M39112_IG08:
        cmp      r15d, r14d
        jg       SHORT G_M39112_IG10
 						;; size=5 bbWeight=32 PerfScore 40.00
 G_M39112_IG09:
        mov      edi, r15d
        jmp      SHORT G_M39112_IG11
 						;; size=5 bbWeight=8 PerfScore 18.00
 G_M39112_IG10:
        mov      edi, r14d
 						;; size=3 bbWeight=8 PerfScore 2.00
 G_M39112_IG11:
        mov      dword ptr [rbp-0x30], edi
        cmp      gword ptr [rbx+0x30], 0
        je       SHORT G_M39112_IG13
 						;; size=10 bbWeight=32 PerfScore 128.00
 G_M39112_IG12:
        mov      rdi, gword ptr [rbx+0x30]
        mov      rdi, gword ptr [rdi+0x08]
        lea      rsi, [rbp-0x48]
        mov      qword ptr [rsp], rsi
        lea      rsi, [rbp-0x60]
        xor      edx, edx
        xor      ecx, ecx
        xor      r8d, r8d
        mov      r9d, 2
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x48]
        call     [rax]System.Diagnostics.Tracing.EventProviderImpl:EventWriteTransfer(byref,nint,ptr,ptr,int,ptr):int:this
        mov      r13d, eax
        test     r13d, r13d
        jne      SHORT G_M39112_IG20
 						;; size=50 bbWeight=16 PerfScore 248.00
 G_M39112_IG13:
        sub      r15d, r14d
        mov      edi, r14d
        add      rdi, qword ptr [rbp-0x38]
        mov      qword ptr [rbp-0x38], rdi
        movzx    rdi, word  ptr [rbp-0x62]
        inc      edi
        mov      word  ptr [rbp-0x62], di
        movzx    rdi, word  ptr [rbp-0x62]
-       mov      eax, 0xD1FFAB1E
-       mov      ecx, edi
-       imul     rax, rcx
-       shr      rax, 34
-       lea      eax, [rax+4*rax]
-       sub      edi, eax
+       imul     edi, edi, 0xD1FFAB1E
+       lea      rdi, [rdi+4*rdi]
+       shr      rdi, 32
+       test     edi, edi
        jne      SHORT G_M39112_IG15
-						;; size=50 bbWeight=16 PerfScore 168.00
+						;; size=46 bbWeight=16 PerfScore 160.00
 G_M39112_IG14:
        mov      edi, 15
        mov      rax, 0xD1FFAB1E      ; code for System.Threading.Thread:Sleep(int)
        call     [rax]System.Threading.Thread:Sleep(int)
 						;; size=17 bbWeight=8 PerfScore 28.00
 G_M39112_IG15:
        test     r15d, r15d
        jg       G_M39112_IG08
 						;; size=9 bbWeight=16 PerfScore 20.00
 G_M39112_IG16:
        xor      r9, r9
        mov      gword ptr [rbp-0x50], r9
 						;; size=7 bbWeight=0.50 PerfScore 0.62
 G_M39112_IG17:
        mov      r9, 0xD1FFAB1E
        cmp      qword ptr [rbp-0x28], r9
        je       SHORT G_M39112_IG18
        call     CORINFO_HELP_FAIL_FAST
 						;; size=21 bbWeight=1 PerfScore 3.25
 G_M39112_IG18:
        nop      
 						;; size=1 bbWeight=1 PerfScore 0.25
 G_M39112_IG19:
        add      rsp, 96
        pop      rbx
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=13 bbWeight=1 PerfScore 3.75
 G_M39112_IG20:
        mov      rdi, 0xD1FFAB1E
        mov      rax, 0xD1FFAB1E      ; function address
        call     rax
        add      rax, 44
        mov      dword ptr [rax+0x10], r13d
        cmp      dword ptr [rax+0x10], 2
        jne      SHORT G_M39112_IG21
        cmp      word  ptr [rbp-0x62], 0
        jne      SHORT G_M39112_IG21
        cmp      r14d, 256
        jg       G_M39112_IG06
 						;; size=56 bbWeight=4 PerfScore 44.00
 G_M39112_IG21:
        test     byte  ptr [rbx+0x94], 1
        je       SHORT G_M39112_IG16
        mov      rdi, rbx
        mov      rsi, 0xD1FFAB1E      ; 'SendManifest'
        xor      rdx, rdx
        mov      rax, 0xD1FFAB1E      ; code for System.Diagnostics.Tracing.EventSource:ThrowEventSourceException(System.String,System.Exception):this
        call     [rax]System.Diagnostics.Tracing.EventSource:ThrowEventSourceException(System.String,System.Exception):this
        jmp      G_M39112_IG16
 						;; size=41 bbWeight=0.50 PerfScore 4.50
 
-; Total bytes of code 496, prolog size 43, PerfScore 846.75, instruction count 126, allocated bytes for code 496 (MethodHash=78876737) for method System.Diagnostics.Tracing.EventSource:SendManifest(byte[]):this (FullOpts)
+; Total bytes of code 492, prolog size 43, PerfScore 838.75, instruction count 124, allocated bytes for code 492 (MethodHash=78876737) for method System.Diagnostics.Tracing.EventSource:SendManifest(byte[]):this (FullOpts)
 ; ============================================================

-1 (-0.58 % of base) - System.Numerics.BigInteger:GetBitLength():long:this

 ; Assembly listing for method System.Numerics.BigInteger:GetBitLength():long:this (FullOpts)
 ; Emitting BLENDED_CODE for x64 + VEX + EVEX on Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 13 single block inlinees; 5 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T00] (  4,  4   )   byref  ->  rdi         this single-def
 ;  V01 loc0         [V01,T05] (  4,  2.50)    long  ->  rax        
 ;  V02 loc1         [V02,T04] (  5,  3   )     int  ->  rsi        
 ;  V03 loc2         [V03,T03] (  5,  3.50)     int  ->  rdx        
 ;  V04 loc3         [V04,T01] (  8,  5   )     ref  ->  rdi         class-hnd single-def <nuint[]>
 ;  V05 loc4         [V05,T06] (  3,  2   )    long  ->  rbx        
 ;# V06 OutArgs      [V06    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <Empty>
 ;* V07 tmp1         [V07    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.Span`1[nuint]>
 ;* V08 tmp2         [V08    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.ReadOnlySpan`1[nuint]>
 ;  V09 tmp3         [V09,T10] (  2,  1   )     int  ->  rax        
 ;* V10 tmp4         [V10    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
 ;* V11 tmp5         [V11    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[nuint]>
 ;  V12 tmp6         [V12,T02] (  4,  4   )     int  ->  rdx         "Inlining Arg"
 ;* V13 tmp7         [V13    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.Span`1[nuint]>
 ;* V14 tmp8         [V14    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.ReadOnlySpan`1[nuint]>
 ;* V15 tmp9         [V15    ] (  0,  0   )   byref  ->  zero-ref    single-def "Inlining Arg"
 ;* V16 tmp10        [V16    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
 ;* V17 tmp11        [V17    ] (  0,  0   )     int  ->  zero-ref    "Inline return value spill temp"
 ;* V18 tmp12        [V18    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.ReadOnlySpan`1[nuint]>
 ;* V19 tmp13        [V19    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.ReadOnlySpan`1[nuint]>
 ;* V20 tmp14        [V20    ] (  0,  0   )   byref  ->  zero-ref    single-def "Inlining Arg"
 ;* V21 tmp15        [V21    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
 ;* V22 tmp16        [V22    ] (  0,  0   )     int  ->  zero-ref    "Inline return value spill temp"
 ;* V23 tmp17        [V23    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.ReadOnlySpan`1[nuint]>
 ;* V24 tmp18        [V24    ] (  0,  0   )     int  ->  zero-ref    "Inline return value spill temp"
 ;* V25 tmp19        [V25    ] (  0,  0   )     int  ->  zero-ref    "Inline stloc first use temp"
 ;* V26 tmp20        [V26    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
 ;* V27 tmp21        [V27    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
 ;* V28 tmp22        [V28    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;* V29 tmp23        [V29    ] (  0,  0   )    long  ->  zero-ref    ld-addr-op "Inlining Arg"
 ;* V30 tmp24        [V30    ] (  0,  0   )   byref  ->  zero-ref    "field V07._reference (fldOffset=0x0)" P-INDEP
 ;* V31 tmp25        [V31    ] (  0,  0   )     int  ->  zero-ref    "field V07._length (fldOffset=0x8)" P-INDEP
 ;* V32 tmp26        [V32    ] (  0,  0   )   byref  ->  zero-ref    "field V08._reference (fldOffset=0x0)" P-INDEP
 ;* V33 tmp27        [V33    ] (  0,  0   )     int  ->  zero-ref    "field V08._length (fldOffset=0x8)" P-INDEP
 ;  V34 tmp28        [V34,T07] (  3,  1.50)   byref  ->  rdi         "field V11._reference (fldOffset=0x0)" P-INDEP
 ;  V35 tmp29        [V35,T08] (  3,  1.50)     int  ->  rdx         "field V11._length (fldOffset=0x8)" P-INDEP
 ;* V36 tmp30        [V36    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V13._reference (fldOffset=0x0)" P-INDEP
 ;* V37 tmp31        [V37    ] (  0,  0   )     int  ->  zero-ref    "field V13._length (fldOffset=0x8)" P-INDEP
 ;* V38 tmp32        [V38    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V14._reference (fldOffset=0x0)" P-INDEP
 ;* V39 tmp33        [V39    ] (  0,  0   )     int  ->  zero-ref    "field V14._length (fldOffset=0x8)" P-INDEP
 ;* V40 tmp34        [V40    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V18._reference (fldOffset=0x0)" P-INDEP
 ;* V41 tmp35        [V41    ] (  0,  0   )     int  ->  zero-ref    "field V18._length (fldOffset=0x8)" P-INDEP
 ;* V42 tmp36        [V42    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V19._reference (fldOffset=0x0)" P-INDEP
 ;* V43 tmp37        [V43    ] (  0,  0   )     int  ->  zero-ref    "field V19._length (fldOffset=0x8)" P-INDEP
 ;* V44 tmp38        [V44    ] (  0,  0   )   byref  ->  zero-ref    "field V23._reference (fldOffset=0x0)" P-INDEP
 ;* V45 tmp39        [V45    ] (  0,  0   )     int  ->  zero-ref    "field V23._length (fldOffset=0x8)" P-INDEP
 ;  V46 cse0         [V46,T09] (  3,  1.50)     int  ->  rax         "CSE #02: moderate"
 ;
 ; Lcl frame size = 8
 
 G_M44111_IG01:
        push     rbp
        push     rbx
        push     rax
        lea      rbp, [rsp+0x10]
 						;; size=8 bbWeight=1 PerfScore 3.50
 G_M44111_IG02:
        mov      edx, dword ptr [rdi+0x08]
        mov      rdi, gword ptr [rdi]
        test     rdi, rdi
        je       SHORT G_M44111_IG04
 						;; size=11 bbWeight=1 PerfScore 5.25
 G_M44111_IG03:
        mov      esi, dword ptr [rdi+0x08]
        lea      eax, [rsi-0x01]
        cmp      eax, dword ptr [rdi+0x08]
        jae      G_M44111_IG13
        mov      rax, qword ptr [rdi+8*rax+0x10]
        jmp      SHORT G_M44111_IG05
 						;; size=22 bbWeight=0.50 PerfScore 4.75
 G_M44111_IG04:
        mov      esi, 1
        mov      eax, edx
        neg      eax
        test     edx, edx
        cmovge   eax, edx
        cdqe     
 						;; size=16 bbWeight=0.50 PerfScore 0.88
 G_M44111_IG05:
        mov      ebx, esi
        shl      rbx, 6
        xor      ecx, ecx
        lzcnt    rcx, rax
-       movsxd   rcx, ecx
+       mov      ecx, ecx
        sub      rbx, rcx
        test     edx, edx
        jge      SHORT G_M44111_IG10
-						;; size=23 bbWeight=1 PerfScore 4.75
+						;; size=22 bbWeight=1 PerfScore 4.75
 G_M44111_IG06:
        blsr     rdx, rax
        jne      SHORT G_M44111_IG10
        dec      esi
        mov      edx, esi
        test     rdi, rdi
        je       SHORT G_M44111_IG07
        cmp      dword ptr [rdi+0x08], edx
        jb       SHORT G_M44111_IG12
        add      rdi, 16
        jmp      SHORT G_M44111_IG08
 						;; size=27 bbWeight=0.50 PerfScore 4.25
 G_M44111_IG07:
        test     edx, edx
        jne      SHORT G_M44111_IG12
        xor      rdi, rdi
        xor      edx, edx
 						;; size=8 bbWeight=0.50 PerfScore 0.88
 G_M44111_IG08:
        xor      esi, esi
        mov      rax, 0xD1FFAB1E      ; code for System.SpanHelpers:NonPackedIndexOfValueType[long,System.SpanHelpers+Negate`1[long]](byref,long,int):int
        call     [rax]System.SpanHelpers:NonPackedIndexOfValueType[long,System.SpanHelpers+Negate`1[long]](byref,long,int):int
        test     eax, eax
        jge      SHORT G_M44111_IG10
        lea      rax, [rbx-0x01]
 						;; size=22 bbWeight=0.50 PerfScore 2.62
 G_M44111_IG09:
        add      rsp, 8
        pop      rbx
        pop      rbp
        ret      
 						;; size=7 bbWeight=0.50 PerfScore 1.12
 G_M44111_IG10:
        mov      rax, rbx
 						;; size=3 bbWeight=0.50 PerfScore 0.12
 G_M44111_IG11:
        add      rsp, 8
        pop      rbx
        pop      rbp
        ret      
 						;; size=7 bbWeight=0.50 PerfScore 1.12
 G_M44111_IG12:
        mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRangeException()
        call     [rax]System.ThrowHelper:ThrowArgumentOutOfRangeException()
        int3     
 						;; size=13 bbWeight=0 PerfScore 0.00
 G_M44111_IG13:
        call     CORINFO_HELP_RNGCHKFAIL
        int3     
 						;; size=6 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 173, prolog size 8, PerfScore 29.25, instruction count 62, allocated bytes for code 173 (MethodHash=624f53b0) for method System.Numerics.BigInteger:GetBitLength():long:this (FullOpts)
+; Total bytes of code 172, prolog size 8, PerfScore 29.25, instruction count 62, allocated bytes for code 172 (MethodHash=624f53b0) for method System.Numerics.BigInteger:GetBitLength():long: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/dc97c694a112d2010a2e00fb2501f33b

[MihuBot]

@MihaZupan