Move leap seconds DateTime configuration statics into LeapSecondCache #77163
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… class This enables AOT initialization of public readonly DateTime statics like DateTime.Min/MaxValue.
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ghost
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jkotas
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Context: #77102 (comment) |
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Thanks, validate locally with changes from #77102 that this: static bool Test(DateTime dt) => dt == DateTime.MinValue;Emits: ; Assembly listing for method Program:Test(System.DateTime):bool
; Emitting BLENDED_CODE for X64 CPU with SSE2 - Windows
; ReadyToRun compilation
; optimized code
; rsp based frame
; partially interruptible
; Final local variable assignments
;
;* V00 arg0 [V00 ] ( 0, 0 ) struct ( 8) zero-ref single-def
;# V01 OutArgs [V01 ] ( 1, 1 ) lclBlk ( 0) [rsp+00H] "OutgoingArgSpace"
;* V02 tmp1 [V02 ] ( 0, 0 ) struct ( 8) zero-ref "folding static ro fld struct"
;* V03 tmp2 [V03 ] ( 0, 0 ) struct ( 8) zero-ref "Inlining Arg"
;* V04 tmp3 [V04 ] ( 0, 0 ) struct ( 8) zero-ref "Inlining Arg"
; V05 tmp4 [V05,T00] ( 2, 2 ) long -> rcx single-def V00._dateData(offs=0x00) P-INDEP "field V00._dateData (fldOffset=0x0)"
;* V06 tmp5 [V06 ] ( 0, 0 ) long -> zero-ref V02._dateData(offs=0x00) P-INDEP "field V02._dateData (fldOffset=0x0)"
;* V07 tmp6 [V07 ] ( 0, 0 ) long -> zero-ref V03._dateData(offs=0x00) P-INDEP "field V03._dateData (fldOffset=0x0)"
;* V08 tmp7 [V08 ] ( 0, 0 ) long -> zero-ref V04._dateData(offs=0x00) P-INDEP "field V04._dateData (fldOffset=0x0)"
;
; Lcl frame size = 0
G_M44292_IG01: ;; offset=0000H
;; size=0 bbWeight=1 PerfScore 0.00
G_M44292_IG02: ;; offset=0000H
48C1E102 shl rcx, 2
0F94C0 sete al
0FB6C0 movzx rax, al
;; size=10 bbWeight=1 PerfScore 1.75
G_M44292_IG03: ;; offset=000AH
C3 ret
;; size=1 bbWeight=1 PerfScore 1.00
; Total bytes of code 11, prolog size 0, PerfScore 3.85, instruction count 4, allocated bytes for code 11 (MethodHash=313f52fb) for method Program:Test(System.DateTime):bool
; ============================================================on NativeAOT |
EgorBo
approved these changes
Oct 18, 2022
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This enables AOT initialization of public readonly DateTime statics like DateTime.Min/MaxValue.