• Russ Cox's avatar
    cmd/cc: add PREFETCH built-in (like SET, USED) · d42495aa
    Russ Cox authored
    This makes it possible to inline the prefetch of upcoming
    memory addresses during garbage collection, instead of
    needing to flush registers, make a function call, and
    reload registers.  On garbage collection-heavy workloads,
    this results in a 5% speedup.
    
    Fixes #3493.
    
    R=dvyukov, ken, r, dave
    CC=golang-dev
    https://golang.org/cl/5990066
    d42495aa
lex.c 25.6 KB