my $string;

print "Double quotes\n";
$string = "LoadStore.SGE.\sr1_addr_reg_tmp_reg[0]";
match();

print "Double quotes with escape\n";
$string = "LoadStore.SGE.\\sr1_addr_reg_tmp_reg[0]";
match();

print "Single quotes\n";
$string = 'LoadStore.SGE.\sr1_addr_reg_tmp_reg[0]';
match();

sub match {
	if ( $string =~ m/LoadStore\.SGE\.\\.r._addr_reg_tmp_reg/ ) {
		print "match\n";
	}
	else {
		print "no match\n";
	}
}