[JitDiff X64] [xtqqczze] Avoid `CollectionsMarshal.AsSpan` for derived `List<T>`

[MihuBot]

Job completed in 16 minutes 35 seconds (remote runner delay: 51 seconds).
dotnet/runtime#118694

Diffs

Found 82 files with textual diffs.

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 41610672
Total bytes of diff: 41610631
Total bytes of delta: -41 (-0.00 % of base)
Total relative delta: -0.08
    diff is an improvement.
    relative diff is an improvement.


Top file improvements (bytes):
         -41 : System.Private.CoreLib.dasm (-0.00 % of base)

1 total files with Code Size differences (1 improved, 0 regressed), 259 unchanged.

Top method improvements (bytes):
         -15 (-1.33 % of base) : System.Private.CoreLib.dasm - System.String:Join(System.String,System.Collections.Generic.IEnumerable`1[System.String]):System.String (FullOpts)
         -15 (-5.73 % of base) : System.Private.CoreLib.dasm - System.Threading.Tasks.Task:WaitAll(System.Collections.Generic.IEnumerable`1[System.Threading.Tasks.Task],System.Threading.CancellationToken) (FullOpts)
         -11 (-1.27 % of base) : System.Private.CoreLib.dasm - System.Threading.Tasks.Task:WhenAll(System.Collections.Generic.IEnumerable`1[System.Threading.Tasks.Task]):System.Threading.Tasks.Task (FullOpts)

Top method improvements (percentages):
         -15 (-5.73 % of base) : System.Private.CoreLib.dasm - System.Threading.Tasks.Task:WaitAll(System.Collections.Generic.IEnumerable`1[System.Threading.Tasks.Task],System.Threading.CancellationToken) (FullOpts)
         -15 (-1.33 % of base) : System.Private.CoreLib.dasm - System.String:Join(System.String,System.Collections.Generic.IEnumerable`1[System.String]):System.String (FullOpts)
         -11 (-1.27 % of base) : System.Private.CoreLib.dasm - System.Threading.Tasks.Task:WhenAll(System.Collections.Generic.IEnumerable`1[System.Threading.Tasks.Task]):System.Threading.Tasks.Task (FullOpts)

3 total methods with Code Size differences (3 improved, 0 regressed), 250321 unchanged.

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

Artifacts:

• build-clr-checked-main.zip (88 MB)
• build-artifacts-main.zip (678 MB)
• build-clr-checked-pr.zip (88 MB)
• build-artifacts-pr.zip (678 MB)
• jit-diffs-pr.zip (138 MB)
• jit-diffs-main.zip (138 MB)
• diff-frameworks.txt (1 KB)
• ShortDiffsImprovements.md (45 KB)
• LongDiffsImprovements.md (102 KB)

[MihuBot]

Top method improvements

-15 (-1.33 % of base) - System.String:Join(System.String,System.Collections.Generic.IEnumerable`1[System.String]):System.String

 ; Assembly listing for method System.String:Join(System.String,System.Collections.Generic.IEnumerable`1[System.String]):System.String (FullOpts)
 ; Emitting BLENDED_CODE for generic X64 + VEX + EVEX on Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 13 single block inlinees; 18 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 arg0         [V00,T01] ( 12, 15   )     ref  ->  rbx         class-hnd single-def <System.String>
-;  V01 arg1         [V01,T13] (  6,  4.50)     ref  ->  r15         class-hnd single-def <System.Collections.Generic.IEnumerable`1[System.String]>
-;  V02 loc0         [V02,T20] (  4,  3   )     ref  ->  rax         class-hnd single-def <System.Collections.Generic.List`1[System.String]>
-;  V03 loc1         [V03,T24] (  4,  2   )     ref  ->  r14         class-hnd exact single-def <System.String[]>
-;  V04 loc2         [V04,T04] (  9, 10   )     ref  ->  [rbp-0x68]  class-hnd EH-live single-def <System.Collections.Generic.IEnumerator`1[System.String]>
-;  V05 loc3         [V05,T19] (  6,  3   )     ref  ->  r14         class-hnd single-def <System.String>
-;  V06 loc4         [V06    ] ( 37, 51.50)  struct (32) [rbp-0x48]  do-not-enreg[XSF] must-init addr-exposed ld-addr-op <System.Text.ValueStringBuilder>
-;  V07 loc5         [V07,T25] (  4,  2   )     ref  ->  rbx         class-hnd <System.String>
-;* V08 loc6         [V08    ] (  0,  0   )  struct (16) zero-ref    <System.Span`1[char]>
-;# V09 OutArgs      [V09    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <Empty>
-;* V10 tmp1         [V10    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[char]>
-;  V11 tmp2         [V11,T22] (  5,  2.50)     ref  ->  r14        
-;* V12 tmp3         [V12    ] (  0,  0   )  struct (16) zero-ref    multireg-arg ld-addr-op "NewObj constructor temp" <System.ReadOnlySpan`1[System.String]>
-;* V13 tmp4         [V13    ] (  0,  0   )  struct (16) zero-ref    multireg-arg "impAppendStmt" <System.ReadOnlySpan`1[char]>
-;* V14 tmp5         [V14    ] (  0,  0   )  struct (16) zero-ref    multireg-arg "impAppendStmt" <System.ReadOnlySpan`1[char]>
-;* V15 tmp6         [V15    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.Span`1[System.__Canon]>
-;* V16 tmp7         [V16    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.ReadOnlySpan`1[System.String]>
-;* V17 tmp8         [V17    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.ReadOnlySpan`1[char]>
-;* V18 tmp9         [V18    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline ldloca(s) first use temp" <System.ReadOnlySpan`1[char]>
-;  V19 tmp10        [V19,T26] (  2,  2   )   byref  ->  rdi         single-def "Inlining Arg"
-;  V20 tmp11        [V20,T29] (  2,  2   )     int  ->  rsi         "Inlining Arg"
-;* V21 tmp12        [V21    ] (  0,  0   )  struct (16) zero-ref    "Inline return value spill temp" <System.Span`1[System.String]>
-;* V22 tmp13        [V22    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline ldloca(s) first use temp" <System.Span`1[System.String]>
-;  V23 tmp14        [V23,T36] (  3,  1.50)     int  ->  rcx         "Inline stloc first use temp"
-;  V24 tmp15        [V24,T32] (  3,  1.50)     ref  ->  rdx         class-hnd single-def "Inline stloc first use temp" <System.String[]>
-;* V25 tmp16        [V25    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[System.String]>
-;* V26 tmp17        [V26    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
-;* V27 tmp18        [V27    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.Span`1[System.String]>
-;* V28 tmp19        [V28    ] (  0,  0   )  struct (16) zero-ref    multireg-arg ld-addr-op "NewObj constructor temp" <System.ReadOnlySpan`1[System.String]>
-;* V29 tmp20        [V29    ] (  0,  0   )   byref  ->  zero-ref    single-def "Inlining Arg"
-;* V30 tmp21        [V30    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
-;* V31 tmp22        [V31    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.ReadOnlySpan`1[char]>
-;* V32 tmp23        [V32    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline ldloca(s) first use temp" <System.ReadOnlySpan`1[char]>
-;  V33 tmp24        [V33,T27] (  2,  2   )   byref  ->  rdi         single-def "Inlining Arg"
-;  V34 tmp25        [V34,T30] (  2,  2   )     int  ->  rsi         "Inlining Arg"
-;  V35 tmp26        [V35,T31] (  2,  2   )    long  ->  rdi         "Inlining Arg"
-;  V36 tmp27        [V36,T23] (  5,  2.50)     int  ->  r13         "Inline stloc first use temp"
-;  V37 tmp28        [V37,T05] (  5, 10   )     int  ->  r13         "Inline stloc first use temp"
-;  V38 tmp29        [V38,T06] (  5, 10   )     int  ->  r14         "Inline stloc first use temp"
-;* V39 tmp30        [V39    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.Span`1[char]>
-;* V40 tmp31        [V40    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[char]>
-;  V41 tmp32        [V41,T09] (  2,  8   )   byref  ->  rdi         "Inlining Arg"
-;  V42 tmp33        [V42,T11] (  2,  8   )     int  ->  rdx         "Inlining Arg"
-;* V43 tmp34        [V43    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.Span`1[char]>
-;* V44 tmp35        [V44    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
-;* V45 tmp36        [V45    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
-;* V46 tmp37        [V46    ] (  0,  0   )    long  ->  zero-ref    "Inlining Arg"
-;  V47 tmp38        [V47,T00] (  5, 28   )     ref  ->  r14         class-hnd "Inlining Arg" <System.__Canon>
-;  V48 tmp39        [V48,T07] (  5, 10   )     int  ->  r12         "Inline stloc first use temp"
-;  V49 tmp40        [V49,T08] (  5, 10   )     int  ->  r13         "Inline stloc first use temp"
-;* V50 tmp41        [V50    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.Span`1[char]>
-;* V51 tmp42        [V51    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[char]>
-;  V52 tmp43        [V52,T10] (  2,  8   )   byref  ->  rdi         "Inlining Arg"
-;  V53 tmp44        [V53,T12] (  2,  8   )     int  ->  rdx         "Inlining Arg"
-;* V54 tmp45        [V54    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.Span`1[char]>
-;* V55 tmp46        [V55    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
-;* V56 tmp47        [V56    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
-;* V57 tmp48        [V57    ] (  0,  0   )    long  ->  zero-ref    "Inlining Arg"
-;  V58 tmp49        [V58    ] (  3,  1.50)  struct (16) [rbp-0x58]  do-not-enreg[XS] must-init addr-exposed ld-addr-op "Inline stloc first use temp" <System.Span`1[char]>
-;  V59 tmp50        [V59,T28] (  2,  2   )     ref  ->  rbx         class-hnd exact single-def "impAppendStmt" <System.String>
-;  V60 tmp51        [V60,T21] (  3,  3   )     int  ->  rdi         "Inlining Arg"
-;* V61 tmp52        [V61    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[char]>
-;* V62 tmp53        [V62    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
-;  V63 tmp54        [V63,T33] (  3,  1.50)     ref  ->  rsi         class-hnd single-def "Inline stloc first use temp" <char[]>
-;* V64 tmp55        [V64    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V08._reference (fldOffset=0x0)" P-INDEP
-;* V65 tmp56        [V65    ] (  0,  0   )     int  ->  zero-ref    "field V08._length (fldOffset=0x8)" P-INDEP
-;  V66 tmp57        [V66,T39] (  2,  1   )   byref  ->  rdi         single-def "field V10._reference (fldOffset=0x0)" P-INDEP
-;* V67 tmp58        [V67    ] (  0,  0   )     int  ->  zero-ref    "field V10._length (fldOffset=0x8)" P-INDEP
-;  V68 tmp59        [V68,T40] (  2,  1   )   byref  ->  rdx         single-def "field V12._reference (fldOffset=0x0)" P-INDEP
-;  V69 tmp60        [V69,T43] (  2,  1   )     int  ->  rcx         "field V12._length (fldOffset=0x8)" P-INDEP
-;  V70 tmp61        [V70,T34] (  3,  1.50)   byref  ->  rdi         "field V13._reference (fldOffset=0x0)" P-INDEP
-;  V71 tmp62        [V71,T37] (  3,  1.50)     int  ->  rsi         "field V13._length (fldOffset=0x8)" P-INDEP
-;  V72 tmp63        [V72,T35] (  3,  1.50)   byref  ->  rdi         "field V14._reference (fldOffset=0x0)" P-INDEP
-;  V73 tmp64        [V73,T38] (  3,  1.50)     int  ->  rsi         "field V14._length (fldOffset=0x8)" P-INDEP
-;* V74 tmp65        [V74    ] (  0,  0   )   byref  ->  zero-ref    "field V15._reference (fldOffset=0x0)" P-INDEP
-;* V75 tmp66        [V75    ] (  0,  0   )     int  ->  zero-ref    "field V15._length (fldOffset=0x8)" P-INDEP
-;* V76 tmp67        [V76    ] (  0,  0   )   byref  ->  zero-ref    "field V16._reference (fldOffset=0x0)" P-INDEP
-;* V77 tmp68        [V77    ] (  0,  0   )     int  ->  zero-ref    "field V16._length (fldOffset=0x8)" P-INDEP
-;* V78 tmp69        [V78    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V17._reference (fldOffset=0x0)" P-INDEP
-;* V79 tmp70        [V79    ] (  0,  0   )     int  ->  zero-ref    "field V17._length (fldOffset=0x8)" P-INDEP
-;* V80 tmp71        [V80    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V18._reference (fldOffset=0x0)" P-INDEP
-;* V81 tmp72        [V81    ] (  0,  0   )     int  ->  zero-ref    "field V18._length (fldOffset=0x8)" P-INDEP
-;* V82 tmp73        [V82    ] (  0,  0   )   byref  ->  zero-ref    "field V21._reference (fldOffset=0x0)" P-INDEP
-;* V83 tmp74        [V83    ] (  0,  0   )     int  ->  zero-ref    "field V21._length (fldOffset=0x8)" P-INDEP
-;* V84 tmp75        [V84    ] (  0,  0   )   byref  ->  zero-ref    "field V22._reference (fldOffset=0x0)" P-INDEP
-;* V85 tmp76        [V85    ] (  0,  0   )     int  ->  zero-ref    "field V22._length (fldOffset=0x8)" P-INDEP
-;  V86 tmp77        [V86,T41] (  2,  1   )   byref  ->  rdx         single-def "field V25._reference (fldOffset=0x0)" P-INDEP
-;* V87 tmp78        [V87    ] (  0,  0   )     int  ->  zero-ref    "field V25._length (fldOffset=0x8)" P-INDEP
-;* V88 tmp79        [V88    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V27._reference (fldOffset=0x0)" P-INDEP
-;* V89 tmp80        [V89    ] (  0,  0   )     int  ->  zero-ref    "field V27._length (fldOffset=0x8)" P-INDEP
-;* V90 tmp81        [V90    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V28._reference (fldOffset=0x0)" P-INDEP
-;* V91 tmp82        [V91    ] (  0,  0   )     int  ->  zero-ref    "field V28._length (fldOffset=0x8)" P-INDEP
-;* V92 tmp83        [V92    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V31._reference (fldOffset=0x0)" P-INDEP
-;* V93 tmp84        [V93    ] (  0,  0   )     int  ->  zero-ref    "field V31._length (fldOffset=0x8)" P-INDEP
-;* V94 tmp85        [V94    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V32._reference (fldOffset=0x0)" P-INDEP
-;* V95 tmp86        [V95    ] (  0,  0   )     int  ->  zero-ref    "field V32._length (fldOffset=0x8)" P-INDEP
-;* V96 tmp87        [V96    ] (  0,  0   )   byref  ->  zero-ref    "field V39._reference (fldOffset=0x0)" P-INDEP
-;* V97 tmp88        [V97    ] (  0,  0   )     int  ->  zero-ref    "field V39._length (fldOffset=0x8)" P-INDEP
-;* V98 tmp89        [V98    ] (  0,  0   )   byref  ->  zero-ref    "field V40._reference (fldOffset=0x0)" P-INDEP
-;* V99 tmp90        [V99    ] (  0,  0   )     int  ->  zero-ref    "field V40._length (fldOffset=0x8)" P-INDEP
-;* V100 tmp91       [V100    ] (  0,  0   )   byref  ->  zero-ref    "field V43._reference (fldOffset=0x0)" P-INDEP
-;* V101 tmp92       [V101    ] (  0,  0   )     int  ->  zero-ref    "field V43._length (fldOffset=0x8)" P-INDEP
-;* V102 tmp93       [V102    ] (  0,  0   )   byref  ->  zero-ref    "field V50._reference (fldOffset=0x0)" P-INDEP
-;* V103 tmp94       [V103    ] (  0,  0   )     int  ->  zero-ref    "field V50._length (fldOffset=0x8)" P-INDEP
-;* V104 tmp95       [V104    ] (  0,  0   )   byref  ->  zero-ref    "field V51._reference (fldOffset=0x0)" P-INDEP
-;* V105 tmp96       [V105    ] (  0,  0   )     int  ->  zero-ref    "field V51._length (fldOffset=0x8)" P-INDEP
-;* V106 tmp97       [V106    ] (  0,  0   )   byref  ->  zero-ref    "field V54._reference (fldOffset=0x0)" P-INDEP
-;* V107 tmp98       [V107    ] (  0,  0   )     int  ->  zero-ref    "field V54._length (fldOffset=0x8)" P-INDEP
-;  V108 tmp99       [V108    ] (  2,  1   )   byref  ->  [rbp-0x58]  do-not-enreg[X] addr-exposed "field V58._reference (fldOffset=0x0)" P-DEP
-;  V109 tmp100      [V109    ] (  2,  1   )     int  ->  [rbp-0x50]  do-not-enreg[X] addr-exposed "field V58._length (fldOffset=0x8)" P-DEP
-;  V110 tmp101      [V110,T42] (  2,  1   )   byref  ->  rax         single-def "field V61._reference (fldOffset=0x0)" P-INDEP
-;* V111 tmp102      [V111    ] (  0,  0   )     int  ->  zero-ref    "field V61._length (fldOffset=0x8)" P-INDEP
+;  V01 arg1         [V01,T13] (  7,  5.25)     ref  ->  rsi         class-hnd single-def <System.Collections.Generic.IEnumerable`1[System.String]>
+;  V02 loc0         [V02,T24] (  4,  2   )     ref  ->  r15         class-hnd exact single-def <System.String[]>
+;  V03 loc1         [V03,T04] (  9, 10   )     ref  ->  [rbp-0x68]  class-hnd EH-live single-def <System.Collections.Generic.IEnumerator`1[System.String]>
+;  V04 loc2         [V04,T18] (  6,  3   )     ref  ->  r14         class-hnd single-def <System.String>
+;  V05 loc3         [V05    ] ( 37, 51.50)  struct (32) [rbp-0x48]  do-not-enreg[XSF] must-init addr-exposed ld-addr-op <System.Text.ValueStringBuilder>
+;  V06 loc4         [V06,T25] (  4,  2   )     ref  ->  rbx         class-hnd <System.String>
+;* V07 loc5         [V07    ] (  0,  0   )  struct (16) zero-ref    <System.Span`1[char]>
+;# V08 OutArgs      [V08    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace" <Empty>
+;* V09 tmp1         [V09    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[char]>
+;  V10 tmp2         [V10,T21] (  5,  2.50)     ref  ->  r14        
+;* V11 tmp3         [V11    ] (  0,  0   )  struct (16) zero-ref    multireg-arg ld-addr-op "NewObj constructor temp" <System.ReadOnlySpan`1[System.String]>
+;* V12 tmp4         [V12    ] (  0,  0   )  struct (16) zero-ref    multireg-arg "impAppendStmt" <System.ReadOnlySpan`1[char]>
+;* V13 tmp5         [V13    ] (  0,  0   )  struct (16) zero-ref    multireg-arg "impAppendStmt" <System.ReadOnlySpan`1[char]>
+;* V14 tmp6         [V14    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.Span`1[System.__Canon]>
+;* V15 tmp7         [V15    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.ReadOnlySpan`1[System.String]>
+;* V16 tmp8         [V16    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.ReadOnlySpan`1[char]>
+;* V17 tmp9         [V17    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline ldloca(s) first use temp" <System.ReadOnlySpan`1[char]>
+;  V18 tmp10        [V18,T26] (  2,  2   )   byref  ->  rdi         single-def "Inlining Arg"
+;  V19 tmp11        [V19,T29] (  2,  2   )     int  ->  rdx         "Inlining Arg"
+;* V20 tmp12        [V20    ] (  0,  0   )  struct (16) zero-ref    "Inline return value spill temp" <System.Span`1[System.String]>
+;* V21 tmp13        [V21    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline ldloca(s) first use temp" <System.Span`1[System.String]>
+;  V22 tmp14        [V22,T19] (  3,  3   )     ref  ->  rsi         class-hnd single-def "Inlining Arg" <System.Collections.Generic.List`1[System.String]>
+;  V23 tmp15        [V23,T37] (  3,  1.50)     int  ->  rcx         "Inline stloc first use temp"
+;  V24 tmp16        [V24,T32] (  3,  1.50)     ref  ->  rsi         class-hnd single-def "Inline stloc first use temp" <System.String[]>
+;* V25 tmp17        [V25    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[System.String]>
+;* V26 tmp18        [V26    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
+;* V27 tmp19        [V27    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.Span`1[System.String]>
+;* V28 tmp20        [V28    ] (  0,  0   )  struct (16) zero-ref    multireg-arg ld-addr-op "NewObj constructor temp" <System.ReadOnlySpan`1[System.String]>
+;* V29 tmp21        [V29    ] (  0,  0   )   byref  ->  zero-ref    single-def "Inlining Arg"
+;* V30 tmp22        [V30    ] (  0,  0   )     int  ->  zero-ref    "Inlining Arg"
+;* V31 tmp23        [V31    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.ReadOnlySpan`1[char]>
+;* V32 tmp24        [V32    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline ldloca(s) first use temp" <System.ReadOnlySpan`1[char]>
+;  V33 tmp25        [V33,T27] (  2,  2   )   byref  ->  rdi         single-def "Inlining Arg"
+;  V34 tmp26        [V34,T30] (  2,  2   )     int  ->  rsi         "Inlining Arg"
+;  V35 tmp27        [V35,T31] (  2,  2   )    long  ->  rdi         "Inlining Arg"
+;  V36 tmp28        [V36,T22] (  5,  2.50)     int  ->  r13         "Inline stloc first use temp"
+;  V37 tmp29        [V37,T05] (  5, 10   )     int  ->  r13         "Inline stloc first use temp"
+;  V38 tmp30        [V38,T06] (  5, 10   )     int  ->  r14         "Inline stloc first use temp"
+;* V39 tmp31        [V39    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.Span`1[char]>
+;* V40 tmp32        [V40    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[char]>
+;  V41 tmp33        [V41,T09] (  2,  8   )   byref  ->  rdi         "Inlining Arg"
+;  V42 tmp34        [V42,T11] (  2,  8   )     int  ->  rdx         "Inlining Arg"
+;* V43 tmp35        [V43    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.Span`1[char]>
+;* V44 tmp36        [V44    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
+;* V45 tmp37        [V45    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
+;* V46 tmp38        [V46    ] (  0,  0   )    long  ->  zero-ref    "Inlining Arg"
+;  V47 tmp39        [V47,T00] (  5, 28   )     ref  ->  r14         class-hnd "Inlining Arg" <System.__Canon>
+;  V48 tmp40        [V48,T07] (  5, 10   )     int  ->  r12         "Inline stloc first use temp"
+;  V49 tmp41        [V49,T08] (  5, 10   )     int  ->  r13         "Inline stloc first use temp"
+;* V50 tmp42        [V50    ] (  0,  0   )  struct (16) zero-ref    "spilled call-like call argument" <System.Span`1[char]>
+;* V51 tmp43        [V51    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[char]>
+;  V52 tmp44        [V52,T10] (  2,  8   )   byref  ->  rdi         "Inlining Arg"
+;  V53 tmp45        [V53,T12] (  2,  8   )     int  ->  rdx         "Inlining Arg"
+;* V54 tmp46        [V54    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inlining Arg" <System.Span`1[char]>
+;* V55 tmp47        [V55    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
+;* V56 tmp48        [V56    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
+;* V57 tmp49        [V57    ] (  0,  0   )    long  ->  zero-ref    "Inlining Arg"
+;  V58 tmp50        [V58    ] (  3,  1.50)  struct (16) [rbp-0x58]  do-not-enreg[XS] must-init addr-exposed ld-addr-op "Inline stloc first use temp" <System.Span`1[char]>
+;  V59 tmp51        [V59,T28] (  2,  2   )     ref  ->  rbx         class-hnd exact single-def "impAppendStmt" <System.String>
+;  V60 tmp52        [V60,T20] (  3,  3   )     int  ->  rdi         "Inlining Arg"
+;* V61 tmp53        [V61    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "NewObj constructor temp" <System.Span`1[char]>
+;* V62 tmp54        [V62    ] (  0,  0   )   byref  ->  zero-ref    "Inlining Arg"
+;  V63 tmp55        [V63,T33] (  3,  1.50)     ref  ->  rsi         class-hnd single-def "Inline stloc first use temp" <char[]>
+;* V64 tmp56        [V64    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V07._reference (fldOffset=0x0)" P-INDEP
+;* V65 tmp57        [V65    ] (  0,  0   )     int  ->  zero-ref    "field V07._length (fldOffset=0x8)" P-INDEP
+;  V66 tmp58        [V66,T41] (  2,  1   )   byref  ->  rdi         single-def "field V09._reference (fldOffset=0x0)" P-INDEP
+;* V67 tmp59        [V67    ] (  0,  0   )     int  ->  zero-ref    "field V09._length (fldOffset=0x8)" P-INDEP
+;  V68 tmp60        [V68,T42] (  2,  1   )   byref  ->  rdx         single-def "field V11._reference (fldOffset=0x0)" P-INDEP
+;  V69 tmp61        [V69,T45] (  2,  1   )     int  ->  rcx         "field V11._length (fldOffset=0x8)" P-INDEP
+;  V70 tmp62        [V70,T34] (  3,  1.50)   byref  ->  rdi         "field V12._reference (fldOffset=0x0)" P-INDEP
+;  V71 tmp63        [V71,T38] (  3,  1.50)     int  ->  rsi         "field V12._length (fldOffset=0x8)" P-INDEP
+;  V72 tmp64        [V72,T35] (  3,  1.50)   byref  ->  rdi         "field V13._reference (fldOffset=0x0)" P-INDEP
+;  V73 tmp65        [V73,T39] (  3,  1.50)     int  ->  rdx         "field V13._length (fldOffset=0x8)" P-INDEP
+;* V74 tmp66        [V74    ] (  0,  0   )   byref  ->  zero-ref    "field V14._reference (fldOffset=0x0)" P-INDEP
+;* V75 tmp67        [V75    ] (  0,  0   )     int  ->  zero-ref    "field V14._length (fldOffset=0x8)" P-INDEP
+;* V76 tmp68        [V76    ] (  0,  0   )   byref  ->  zero-ref    "field V15._reference (fldOffset=0x0)" P-INDEP
+;* V77 tmp69        [V77    ] (  0,  0   )     int  ->  zero-ref    "field V15._length (fldOffset=0x8)" P-INDEP
+;* V78 tmp70        [V78    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V16._reference (fldOffset=0x0)" P-INDEP
+;* V79 tmp71        [V79    ] (  0,  0   )     int  ->  zero-ref    "field V16._length (fldOffset=0x8)" P-INDEP
+;* V80 tmp72        [V80    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V17._reference (fldOffset=0x0)" P-INDEP
+;* V81 tmp73        [V81    ] (  0,  0   )     int  ->  zero-ref    "field V17._length (fldOffset=0x8)" P-INDEP
+;* V82 tmp74        [V82    ] (  0,  0   )   byref  ->  zero-ref    "field V20._reference (fldOffset=0x0)" P-INDEP
+;* V83 tmp75        [V83    ] (  0,  0   )     int  ->  zero-ref    "field V20._length (fldOffset=0x8)" P-INDEP
+;  V84 tmp76        [V84,T36] (  2,  1   )   byref  ->  rax         "field V21._reference (fldOffset=0x0)" P-INDEP
+;  V85 tmp77        [V85,T40] (  2,  1   )     int  ->  rcx         "field V21._length (fldOffset=0x8)" P-INDEP
+;  V86 tmp78        [V86,T43] (  2,  1   )   byref  ->  rsi         single-def "field V25._reference (fldOffset=0x0)" P-INDEP
+;* V87 tmp79        [V87    ] (  0,  0   )     int  ->  zero-ref    "field V25._length (fldOffset=0x8)" P-INDEP
+;* V88 tmp80        [V88    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V27._reference (fldOffset=0x0)" P-INDEP
+;* V89 tmp81        [V89    ] (  0,  0   )     int  ->  zero-ref    "field V27._length (fldOffset=0x8)" P-INDEP
+;* V90 tmp82        [V90    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V28._reference (fldOffset=0x0)" P-INDEP
+;* V91 tmp83        [V91    ] (  0,  0   )     int  ->  zero-ref    "field V28._length (fldOffset=0x8)" P-INDEP
+;* V92 tmp84        [V92    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V31._reference (fldOffset=0x0)" P-INDEP
+;* V93 tmp85        [V93    ] (  0,  0   )     int  ->  zero-ref    "field V31._length (fldOffset=0x8)" P-INDEP
+;* V94 tmp86        [V94    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V32._reference (fldOffset=0x0)" P-INDEP
+;* V95 tmp87        [V95    ] (  0,  0   )     int  ->  zero-ref    "field V32._length (fldOffset=0x8)" P-INDEP
+;* V96 tmp88        [V96    ] (  0,  0   )   byref  ->  zero-ref    "field V39._reference (fldOffset=0x0)" P-INDEP
+;* V97 tmp89        [V97    ] (  0,  0   )     int  ->  zero-ref    "field V39._length (fldOffset=0x8)" P-INDEP
+;* V98 tmp90        [V98    ] (  0,  0   )   byref  ->  zero-ref    "field V40._reference (fldOffset=0x0)" P-INDEP
+;* V99 tmp91        [V99    ] (  0,  0   )     int  ->  zero-ref    "field V40._length (fldOffset=0x8)" P-INDEP
+;* V100 tmp92       [V100    ] (  0,  0   )   byref  ->  zero-ref    "field V43._reference (fldOffset=0x0)" P-INDEP
+;* V101 tmp93       [V101    ] (  0,  0   )     int  ->  zero-ref    "field V43._length (fldOffset=0x8)" P-INDEP
+;* V102 tmp94       [V102    ] (  0,  0   )   byref  ->  zero-ref    "field V50._reference (fldOffset=0x0)" P-INDEP
+;* V103 tmp95       [V103    ] (  0,  0   )     int  ->  zero-ref    "field V50._length (fldOffset=0x8)" P-INDEP
+;* V104 tmp96       [V104    ] (  0,  0   )   byref  ->  zero-ref    "field V51._reference (fldOffset=0x0)" P-INDEP
+;* V105 tmp97       [V105    ] (  0,  0   )     int  ->  zero-ref    "field V51._length (fldOffset=0x8)" P-INDEP
+;* V106 tmp98       [V106    ] (  0,  0   )   byref  ->  zero-ref    "field V54._reference (fldOffset=0x0)" P-INDEP
+;* V107 tmp99       [V107    ] (  0,  0   )     int  ->  zero-ref    "field V54._length (fldOffset=0x8)" P-INDEP
+;  V108 tmp100      [V108    ] (  2,  1   )   byref  ->  [rbp-0x58]  do-not-enreg[X] addr-exposed "field V58._reference (fldOffset=0x0)" P-DEP
+;  V109 tmp101      [V109    ] (  2,  1   )     int  ->  [rbp-0x50]  do-not-enreg[X] addr-exposed "field V58._length (fldOffset=0x8)" P-DEP
+;  V110 tmp102      [V110,T44] (  2,  1   )   byref  ->  rax         single-def "field V61._reference (fldOffset=0x0)" P-INDEP
+;* V111 tmp103      [V111    ] (  0,  0   )     int  ->  zero-ref    "field V61._length (fldOffset=0x8)" P-INDEP
 ;  V112 GsCookie    [V112    ] (  1,  1   )    long  ->  [rbp-0x70]  do-not-enreg[X] addr-exposed "GSSecurityCookie"
 ;  V113 cse0        [V113,T03] (  7, 14   )     int  ->  [rbp-0x5C]  spill-single-def "CSE #10: aggressive"
 ;  V114 cse1        [V114,T02] ( 11, 16   )     int  ->  r12         multi-def "CSE #02: aggressive"
-;  V115 cse2        [V115,T44] (  2,  1   )     int  ->  rdi         "CSE #05: conservative"
+;  V115 cse2        [V115,T46] (  2,  1   )     int  ->  rdi         "CSE #05: conservative"
 ;  V116 cse3        [V116,T14] (  3,  6   )     int  ->  r14         "CSE #07: moderate"
 ;  V117 cse4        [V117,T15] (  3,  6   )     int  ->  rdx         "CSE #08: moderate"
 ;  V118 cse5        [V118,T16] (  3,  6   )     int  ->  r13         "CSE #11: moderate"
 ;  V119 cse6        [V119,T17] (  3,  6   )     int  ->  rdx         "CSE #12: moderate"
-;  V120 rat0        [V120,T18] (  5,  3.75)     ref  ->  r14         "replacement local"
-;  V121 rat1        [V121,T45] (  2,  1   )    long  ->  rdi         "CSE for expectedClsNode"
+;  V120 rat0        [V120,T23] (  4,  2.25)     ref  ->  r15         "replacement local"
+;  V121 rat1        [V121,T47] (  2,  1   )    long  ->  rdi         "CSE for expectedClsNode"
 ;
 ; Lcl frame size = 72
 
 G_M8186_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-0x58], rax
        vxorps   xmm8, xmm8, xmm8
        vmovdqu  ymmword ptr [rbp-0x50], ymm8
        mov      qword ptr [rbp-0x30], rax
        mov      qword ptr [rbp-0x70], 0xD1FFAB1E
        mov      rbx, rdi
-       mov      r15, rsi
-						;; size=53 bbWeight=1 PerfScore 12.83
+						;; size=50 bbWeight=1 PerfScore 12.58
 G_M8186_IG02:
-       mov      rsi, r15
+       test     rsi, rsi
+       je       G_M8186_IG41
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.List`1[System.String]
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_ISINSTANCEOFCLASS
-       call     [rax]CORINFO_HELP_ISINSTANCEOFCLASS
-       test     rax, rax
-       jne      G_M8186_IG37
-						;; size=34 bbWeight=1 PerfScore 5.00
+       cmp      qword ptr [rsi], rdi
+       je       G_M8186_IG36
+						;; size=28 bbWeight=1 PerfScore 5.50
 G_M8186_IG03:
-       mov      r14, r15
-       test     r14, r14
-       je       SHORT G_M8186_IG06
-						;; size=8 bbWeight=0.50 PerfScore 0.75
-G_M8186_IG04:
+       mov      r15, rsi
        mov      rdi, 0xD1FFAB1E      ; System.String[]
-       cmp      qword ptr [r14], rdi
-       je       SHORT G_M8186_IG06
-						;; size=15 bbWeight=0.25 PerfScore 1.06
-G_M8186_IG05:
-       xor      r14, r14
+       cmp      qword ptr [r15], rdi
+       je       SHORT G_M8186_IG05
+						;; size=18 bbWeight=0.25 PerfScore 1.12
+G_M8186_IG04:
+       xor      r15, r15
 						;; size=3 bbWeight=0.12 PerfScore 0.03
-G_M8186_IG06:
-       test     r14, r14
-       jne      G_M8186_IG32
+G_M8186_IG05:
        test     r15, r15
-       je       G_M8186_IG43
-       mov      rdi, r15
+       jne      G_M8186_IG31
+       mov      rdi, rsi
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[System.__Canon]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.__Canon]:this
        call     [r11]System.Collections.Generic.IEnumerable`1[System.__Canon]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.__Canon]:this
        mov      r15, rax
        mov      gword ptr [rbp-0x68], r15
-						;; size=41 bbWeight=0.50 PerfScore 3.62
-G_M8186_IG07:
+						;; size=32 bbWeight=0.50 PerfScore 3.00
+G_M8186_IG06:
        mov      rdi, r15
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.IEnumerator:MoveNext():bool:this
        call     [r11]System.Collections.IEnumerator:MoveNext():bool:this
        test     eax, eax
-       je       G_M8186_IG25
+       je       G_M8186_IG24
        mov      rdi, r15
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
        call     [r11]System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
        mov      r14, rax
        mov      rdi, r15
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.IEnumerator:MoveNext():bool:this
        call     [r11]System.Collections.IEnumerator:MoveNext():bool:this
        test     eax, eax
-       je       G_M8186_IG24
+       je       G_M8186_IG23
        test     dword ptr [rsp], esp
        sub      rsp, 512
        lea      rdi, [rsp]
        xor      rsi, rsi
        mov      gword ptr [rbp-0x48], rsi
        mov      bword ptr [rbp-0x38], rdi
        mov      dword ptr [rbp-0x30], 256
 						;; size=98 bbWeight=0.50 PerfScore 10.12
-G_M8186_IG08:
+G_M8186_IG07:
        mov      dword ptr [rbp-0x40], esi
        test     r14, r14
-       je       SHORT G_M8186_IG11
+       je       SHORT G_M8186_IG10
        mov      r13d, dword ptr [rbp-0x40]
        mov      edi, dword ptr [r14+0x08]
        cmp      edi, 1
-       jne      SHORT G_M8186_IG09
+       jne      SHORT G_M8186_IG08
        cmp      r13d, dword ptr [rbp-0x30]
-       jb       SHORT G_M8186_IG10
+       jb       SHORT G_M8186_IG09
 						;; size=27 bbWeight=0.50 PerfScore 4.75
-G_M8186_IG09:
+G_M8186_IG08:
        lea      rdi, [rbp-0x48]
        mov      rsi, r14
        mov      rax, 0xD1FFAB1E      ; code for System.Text.ValueStringBuilder:AppendSlow(System.String):this
        call     [rax]System.Text.ValueStringBuilder:AppendSlow(System.String):this
-       jmp      SHORT G_M8186_IG11
+       jmp      SHORT G_M8186_IG10
 						;; size=21 bbWeight=0.50 PerfScore 3.00
-G_M8186_IG10:
+G_M8186_IG09:
        cmp      r13d, dword ptr [rbp-0x30]
-       jae      G_M8186_IG28
+       jae      G_M8186_IG27
        mov      rsi, bword ptr [rbp-0x38]
        mov      edi, r13d
        movzx    rax, word  ptr [r14+0x0C]
        mov      word  ptr [rsi+2*rdi], ax
        inc      r13d
        mov      dword ptr [rbp-0x40], r13d
 						;; size=33 bbWeight=0.50 PerfScore 4.25
-G_M8186_IG11:
+G_M8186_IG10:
        test     rbx, rbx
-       je       G_M8186_IG16
+       je       G_M8186_IG15
 						;; size=9 bbWeight=4 PerfScore 5.00
-G_M8186_IG12:
+G_M8186_IG11:
        mov      r14d, dword ptr [rbp-0x40]
        mov      r13d, r14d
        mov      r12d, dword ptr [rbx+0x08]
        cmp      r12d, 1
-       jne      SHORT G_M8186_IG13
+       jne      SHORT G_M8186_IG12
        cmp      r13d, dword ptr [rbp-0x30]
-       jb       SHORT G_M8186_IG15
+       jb       SHORT G_M8186_IG14
 						;; size=23 bbWeight=2 PerfScore 15.00
-G_M8186_IG13:
+G_M8186_IG12:
        mov      esi, dword ptr [rbp-0x30]
        sub      esi, r12d
        cmp      esi, r14d
-       jge      SHORT G_M8186_IG14
+       jge      SHORT G_M8186_IG13
        mov      esi, r12d
        lea      rdi, [rbp-0x48]
        mov      rax, 0xD1FFAB1E      ; code for System.Text.ValueStringBuilder:Grow(int):this
        call     [rax]System.Text.ValueStringBuilder:Grow(int):this
 						;; size=30 bbWeight=2 PerfScore 13.00
-G_M8186_IG14:
+G_M8186_IG13:
        mov      edx, dword ptr [rbp-0x30]
        cmp      r14d, edx
-       ja       G_M8186_IG27
+       ja       G_M8186_IG26
        mov      rsi, bword ptr [rbp-0x38]
        mov      edi, r14d
        lea      rdi, bword ptr [rsi+2*rdi]
        sub      edx, r14d
        cmp      r12d, edx
-       ja       G_M8186_IG26
+       ja       G_M8186_IG25
        mov      edx, r12d
        add      rdx, rdx
        lea      rsi, bword ptr [rbx+0x0C]
        mov      rax, 0xD1FFAB1E      ; code for System.SpanHelpers:Memmove(byref,byref,nuint)
        call     [rax]System.SpanHelpers:Memmove(byref,byref,nuint)
        add      r12d, dword ptr [rbp-0x40]
        mov      dword ptr [rbp-0x40], r12d
-       jmp      SHORT G_M8186_IG16
+       jmp      SHORT G_M8186_IG15
 						;; size=67 bbWeight=2 PerfScore 29.50
-G_M8186_IG15:
+G_M8186_IG14:
        cmp      r13d, dword ptr [rbp-0x30]
-       jae      G_M8186_IG28
+       jae      G_M8186_IG27
        mov      rdi, bword ptr [rbp-0x38]
        mov      r11d, r13d
        movzx    rax, word  ptr [rbx+0x0C]
        mov      word  ptr [rdi+2*r11], ax
        inc      r13d
        mov      dword ptr [rbp-0x40], r13d
 						;; size=33 bbWeight=2 PerfScore 17.00
-G_M8186_IG16:
+G_M8186_IG15:
        mov      rdi, r15
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
        call     [r11]System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
        mov      r14, rax
        test     r14, r14
-       je       G_M8186_IG21
+       je       G_M8186_IG20
 						;; size=28 bbWeight=4 PerfScore 20.00
-G_M8186_IG17:
+G_M8186_IG16:
        mov      r13d, dword ptr [rbp-0x40]
        mov      r12d, r13d
        mov      eax, dword ptr [r14+0x08]
        mov      dword ptr [rbp-0x5C], eax
        cmp      eax, 1
-       jne      SHORT G_M8186_IG18
+       jne      SHORT G_M8186_IG17
        cmp      r12d, dword ptr [rbp-0x30]
-       jb       SHORT G_M8186_IG20
+       jb       SHORT G_M8186_IG19
 						;; size=25 bbWeight=2 PerfScore 17.00
-G_M8186_IG18:
+G_M8186_IG17:
        mov      esi, dword ptr [rbp-0x30]
        sub      esi, eax
        cmp      esi, r13d
-       jge      SHORT G_M8186_IG19
+       jge      SHORT G_M8186_IG18
        mov      esi, eax
        lea      rdi, [rbp-0x48]
        mov      rcx, 0xD1FFAB1E      ; code for System.Text.ValueStringBuilder:Grow(int):this
        call     [rcx]System.Text.ValueStringBuilder:Grow(int):this
        mov      eax, dword ptr [rbp-0x5C]
 						;; size=31 bbWeight=2 PerfScore 15.00
-G_M8186_IG19:
+G_M8186_IG18:
        mov      edx, dword ptr [rbp-0x30]
        cmp      r13d, edx
-       ja       G_M8186_IG27
+       ja       G_M8186_IG26
        mov      rsi, bword ptr [rbp-0x38]
        mov      edi, r13d
        lea      rdi, bword ptr [rsi+2*rdi]
        sub      edx, r13d
        cmp      eax, edx
-       ja       G_M8186_IG26
+       ja       G_M8186_IG25
        mov      edx, eax
        add      rdx, rdx
        lea      rsi, bword ptr [r14+0x0C]
        mov      rcx, 0xD1FFAB1E      ; code for System.SpanHelpers:Memmove(byref,byref,nuint)
        call     [rcx]System.SpanHelpers:Memmove(byref,byref,nuint)
        mov      r12d, dword ptr [rbp-0x5C]
        add      r12d, dword ptr [rbp-0x40]
        mov      dword ptr [rbp-0x40], r12d
-       jmp      SHORT G_M8186_IG21
+       jmp      SHORT G_M8186_IG20
 						;; size=69 bbWeight=2 PerfScore 31.50
-G_M8186_IG20:
+G_M8186_IG19:
        cmp      r12d, dword ptr [rbp-0x30]
-       jae      G_M8186_IG28
+       jae      G_M8186_IG27
        mov      rdi, bword ptr [rbp-0x38]
        mov      r11d, r12d
        movzx    rax, word  ptr [r14+0x0C]
        mov      word  ptr [rdi+2*r11], ax
        inc      r12d
        mov      dword ptr [rbp-0x40], r12d
 						;; size=34 bbWeight=2 PerfScore 17.00
-G_M8186_IG21:
+G_M8186_IG20:
        mov      rdi, r15
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.IEnumerator:MoveNext():bool:this
        call     [r11]System.Collections.IEnumerator:MoveNext():bool:this
        test     eax, eax
-       jne      G_M8186_IG11
+       jne      G_M8186_IG10
 						;; size=24 bbWeight=4 PerfScore 19.00
-G_M8186_IG22:
+G_M8186_IG21:
        mov      edi, dword ptr [rbp-0x40]
        cmp      edi, dword ptr [rbp-0x30]
-       ja       G_M8186_IG27
+       ja       G_M8186_IG26
        mov      rax, bword ptr [rbp-0x38]
        mov      bword ptr [rbp-0x58], rax
        mov      dword ptr [rbp-0x50], edi
        lea      rdi, [rbp-0x58]
        mov      rax, 0xD1FFAB1E      ; code for System.Span`1[char]:ToString():System.String:this
        call     [rax]System.Span`1[char]:ToString():System.String:this
        mov      rbx, rax
        mov      rsi, gword ptr [rbp-0x48]
        vxorps   ymm0, ymm0, ymm0
        vmovdqu  ymmword ptr [rbp-0x48], ymm0
        test     rsi, rsi
-       je       SHORT G_M8186_IG23
+       je       SHORT G_M8186_IG22
        mov      rdi, 0xD1FFAB1E      ; const ptr
        mov      rdi, gword ptr [rdi]
        xor      edx, edx
        mov      rax, 0xD1FFAB1E      ; code for System.Buffers.SharedArrayPool`1[char]:Return(char[],bool):this
        call     [rax]System.Buffers.SharedArrayPool`1[char]:Return(char[],bool):this
 						;; size=87 bbWeight=0.50 PerfScore 10.17
-G_M8186_IG23:
-       jmp      SHORT G_M8186_IG29
+G_M8186_IG22:
+       jmp      SHORT G_M8186_IG28
 						;; size=2 bbWeight=0.50 PerfScore 1.00
-G_M8186_IG24:
+G_M8186_IG23:
        mov      rdi, 0xD1FFAB1E      ; ''
        test     r14, r14
        cmove    r14, rdi
        mov      rbx, r14
-       jmp      SHORT G_M8186_IG29
+       jmp      SHORT G_M8186_IG28
 						;; size=22 bbWeight=0.50 PerfScore 1.50
-G_M8186_IG25:
+G_M8186_IG24:
        mov      rbx, 0xD1FFAB1E      ; ''
-       jmp      SHORT G_M8186_IG29
+       jmp      SHORT G_M8186_IG28
 						;; size=12 bbWeight=0.50 PerfScore 1.12
-G_M8186_IG26:
+G_M8186_IG25:
        mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentException_DestinationTooShort()
        call     [rax]System.ThrowHelper:ThrowArgumentException_DestinationTooShort()
        int3     
 						;; size=13 bbWeight=0 PerfScore 0.00
-G_M8186_IG27:
+G_M8186_IG26:
        mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRangeException()
        call     [rax]System.ThrowHelper:ThrowArgumentOutOfRangeException()
        int3     
 						;; size=13 bbWeight=0 PerfScore 0.00
-G_M8186_IG28:
+G_M8186_IG27:
        call     CORINFO_HELP_RNGCHKFAIL
        int3     
 						;; size=6 bbWeight=0 PerfScore 0.00
-G_M8186_IG29:
+G_M8186_IG28:
        mov      rdi, r15
        mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
        call     [r11]System.IDisposable:Dispose():this
        mov      rax, rbx
        cmp      qword ptr [rbp-0x70], 0xD1FFAB1E
-       je       SHORT G_M8186_IG30
+       je       SHORT G_M8186_IG29
        call     CORINFO_HELP_FAIL_FAST
 						;; size=34 bbWeight=0.50 PerfScore 3.88
-G_M8186_IG30:
+G_M8186_IG29:
        nop      
 						;; size=1 bbWeight=0.50 PerfScore 0.12
-G_M8186_IG31:
+G_M8186_IG30:
        lea      rsp, [rbp-0x28]
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=0.50 PerfScore 2.25
-G_M8186_IG32:
+G_M8186_IG31:
        test     rbx, rbx
-       je       SHORT G_M8186_IG33
+       je       SHORT G_M8186_IG32
        lea      rdi, bword ptr [rbx+0x0C]
        mov      r12d, dword ptr [rbx+0x08]
        mov      esi, r12d
-       jmp      SHORT G_M8186_IG34
+       jmp      SHORT G_M8186_IG33
 						;; size=18 bbWeight=0.50 PerfScore 3.00
-G_M8186_IG33:
+G_M8186_IG32:
        xor      rdi, rdi
        xor      esi, esi
 						;; size=4 bbWeight=0.50 PerfScore 0.25
-G_M8186_IG34:
-       lea      rdx, bword ptr [r14+0x10]
-       mov      ecx, dword ptr [r14+0x08]
+G_M8186_IG33:
+       lea      rdx, bword ptr [r15+0x10]
+       mov      ecx, dword ptr [r15+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.String:JoinCore(System.ReadOnlySpan`1[char],System.ReadOnlySpan`1[System.String]):System.String
        call     [rax]System.String:JoinCore(System.ReadOnlySpan`1[char],System.ReadOnlySpan`1[System.String]):System.String
        cmp      qword ptr [rbp-0x70], 0xD1FFAB1E
-       je       SHORT G_M8186_IG35
+       je       SHORT G_M8186_IG34
        call     CORINFO_HELP_FAIL_FAST
 						;; size=35 bbWeight=0.50 PerfScore 4.88
-G_M8186_IG35:
+G_M8186_IG34:
        nop      
 						;; size=1 bbWeight=0.50 PerfScore 0.12
-G_M8186_IG36:
+G_M8186_IG35:
        lea      rsp, [rbp-0x28]
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=0.50 PerfScore 2.25
-G_M8186_IG37:
+G_M8186_IG36:
        test     rbx, rbx
-       je       SHORT G_M8186_IG38
+       je       SHORT G_M8186_IG37
        lea      rdi, bword ptr [rbx+0x0C]
        mov      r12d, dword ptr [rbx+0x08]
-       mov      esi, r12d
-       jmp      SHORT G_M8186_IG39
+       mov      edx, r12d
+       jmp      SHORT G_M8186_IG38
 						;; size=18 bbWeight=0.50 PerfScore 3.00
-G_M8186_IG38:
+G_M8186_IG37:
        xor      rdi, rdi
-       xor      esi, esi
+       xor      edx, edx
 						;; size=4 bbWeight=0.50 PerfScore 0.25
-G_M8186_IG39:
-       mov      ecx, dword ptr [rax+0x10]
-       mov      rdx, gword ptr [rax+0x08]
-       cmp      dword ptr [rdx+0x08], ecx
+G_M8186_IG38:
+       mov      ecx, dword ptr [rsi+0x10]
+       mov      rsi, gword ptr [rsi+0x08]
+       cmp      dword ptr [rsi+0x08], ecx
        jb       SHORT G_M8186_IG42
-       add      rdx, 16
+       add      rsi, 16
+       mov      rax, rsi
+       mov      esi, edx
+       mov      rdx, rax
        mov      rax, 0xD1FFAB1E      ; code for System.String:JoinCore(System.ReadOnlySpan`1[char],System.ReadOnlySpan`1[System.String]):System.String
        call     [rax]System.String:JoinCore(System.ReadOnlySpan`1[char],System.ReadOnlySpan`1[System.String]):System.String
        cmp      qword ptr [rbp-0x70], 0xD1FFAB1E
-       je       SHORT G_M8186_IG40
+       je       SHORT G_M8186_IG39
        call     CORINFO_HELP_FAIL_FAST
-						;; size=43 bbWeight=0.50 PerfScore 7.75
-G_M8186_IG40:
+						;; size=51 bbWeight=0.50 PerfScore 8.12
+G_M8186_IG39:
        nop      
 						;; size=1 bbWeight=0.50 PerfScore 0.12
-G_M8186_IG41:
+G_M8186_IG40:
        lea      rsp, [rbp-0x28]
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=0.50 PerfScore 2.25
+G_M8186_IG41:
+       mov      edi, 6
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentNullException(int)
+       call     [rax]System.ThrowHelper:ThrowArgumentNullException(int)
+       int3     
+						;; size=18 bbWeight=0 PerfScore 0.00
 G_M8186_IG42:
        mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowInvalidOperationException_ConcurrentOperationsNotSupported()
        call     [rax]System.ThrowHelper:ThrowInvalidOperationException_ConcurrentOperationsNotSupported()
        int3     
 						;; size=13 bbWeight=0 PerfScore 0.00
 G_M8186_IG43:
-       mov      edi, 6
-       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentNullException(int)
-       call     [rax]System.ThrowHelper:ThrowArgumentNullException(int)
-       int3     
-						;; size=18 bbWeight=0 PerfScore 0.00
-G_M8186_IG44:
        push     rax
 						;; size=1 bbWeight=0 PerfScore 0.00
-G_M8186_IG45:
+G_M8186_IG44:
        cmp      gword ptr [rbp-0x68], 0
-       je       SHORT G_M8186_IG46
+       je       SHORT G_M8186_IG45
        mov      rdi, gword ptr [rbp-0x68]
        mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
        call     [r11]System.IDisposable:Dispose():this
 						;; size=24 bbWeight=0 PerfScore 0.00
-G_M8186_IG46:
+G_M8186_IG45:
        nop      
 						;; size=1 bbWeight=0 PerfScore 0.00
-G_M8186_IG47:
+G_M8186_IG46:
        add      rsp, 8
        ret      
 						;; size=5 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 1127, prolog size 53, PerfScore 288.34, instruction count 296, allocated bytes for code 1127 (MethodHash=3c36e005) for method System.String:Join(System.String,System.Collections.Generic.IEnumerable`1[System.String]):System.String (FullOpts)
+; Total bytes of code 1112, prolog size 50, PerfScore 287.66, instruction count 293, allocated bytes for code 1112 (MethodHash=3c36e005) for method System.String:Join(System.String,System.Collections.Generic.IEnumerable`1[System.String]):System.String (FullOpts)
 ; ============================================================

Larger list of diffs: https://gist.github.com/MihuBot/caca4b6ed0d8f78322263ca3125bf0b5

[MihuBot]

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