• David Chase's avatar
    cmd/compile: make loop finder more aware of irreducible loops · 9e21e9c5
    David Chase authored
    The loop finder doesn't return good information if it
    encounters an irreducible loop.  Make a start on improving
    this, and set a function-level flag to indicate when there
    is such a loop (and the returned information might be flaky).
    
    Use that flag to prevent the loop rotater from getting
    confused; the existing code seems to depend on artifacts
    of the previous loop-finding algorithm. (There is one
    irreducible loop in the go library, in "inflate.go").
    
    Change-Id: If6e26feab38d9b009d2252d556e1470c803bde40
    Reviewed-on: https://go-review.googlesource.com/42150
    Run-TryBot: David Chase <drchase@google.com>
    TryBot-Result: Gobot Gobot <gobot@golang.org>
    Reviewed-by: 's avatarCherry Zhang <cherryyz@google.com>
    9e21e9c5
check.go 13 KB