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  2. github.com/golang/go

    src/cmd/compile/internal/ssa/_gen/ARM64.rules 

    (MOVBUreg (UBFX [bfc] x)) && bfc.getARM64BFwidth() <=  8 => (UBFX [bfc] x)

// ubfiz/ubfx combinations: merge shifts into bitfield ops
(SRLconst [sc] (UBFX [bfc] x)) && sc < bfc.getARM64BFwidth()
	=> (UBFX [armBFAuxInt(bfc.getARM64BFlsb()+sc, bfc.getARM64BFwidth()-sc)] x)
(UBFX [bfc] (SRLconst [sc] x)) && sc+bfc.getARM64BFwidth()+bfc.getARM64BFlsb() < 64
    Registered: Wed Jun 12 16:32:35 UTC 2024
    - Last Modified: Thu May 23 15:49:20 UTC 2024
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