B::Bblock(3pm) Perl Programmers Reference Guide B::Bblock(3pm)
NAME
B::Bblock - Walk basic blocks
SYNOPSIS
# External interface
perl -MO=Bblock[,OPTIONS] foo.pl
# Programmatic API
use B::Bblock qw(find_leaders);
my $leaders = find_leaders($root_op, $start_op);
DESCRIPTION
This module is used by the B::CC back end. It walks "basic blocks". A
basic block is a series of operations which is known to execute from
start to finish, with no possibility of branching or halting.
It can be used either stand alone or from inside another program.
Functions
find_leaders
my $leaders = find_leaders($root_op, $start_op);
Given the root of the op tree and an op from which to start pro-
cessing, it will return a hash ref representing all the ops which
start a block.
The values of %$leaders are the op objects themselves. Keys are
$$op addresses.
AUTHOR
Malcolm Beattie, "mbeattie@sable.ox.ac.uk"
perl v5.8.9 2001-09-21 B::Bblock(3pm)
Mac OS X 10.6 - Generated Thu Sep 17 20:10:41 CDT 2009