• Carl Shapiro's avatar
    cmd/cc, cmd/gc, runtime: emit bitmaps for scanning locals. · 73c93a40
    Carl Shapiro authored
    Previously, all word aligned locations in the local variables
    area were scanned as conservative roots.  With this change, a
    bitmap is generated describing the locations of pointer values
    in local variables.
    
    With this change the argument bitmap information has been
    changed to only store information about arguments.  The locals
    member, has been removed.  In its place, the bitmap data for
    local variables is now used to store the size of locals.  If
    the size is negative, the magnitude indicates the size of the
    local variables area.
    
    R=rsc
    CC=golang-dev
    https://golang.org/cl/12328044
    73c93a40
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