dotnet/runtime

JIT: missing opportunities in constant folding around bitwise ops

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#95,747 opened on 2023年12月7日

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説明

int Test(int x, int y) => (x | 5) | (y | 3); // E.g. Enums

Current asm:

; Method Program:Test(int,int):int:this (FullOpts)
       or       edx, 5
       mov      eax, edx
       or       eax, r8d
       or       eax, 3
       ret      
; Total bytes of code: 12

Expected asm:

       mov      eax, edx
       or       eax, r8d
       or       eax, 7
       ret      
; Total bytes of code: 9

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