Subversion Repositories openrisc

/* { dg-do compile } */

/* { dg-options "-O2" } */

typedef unsigned IPos;

typedef unsigned char uch;

extern uch window[];

unsigned max_chain_length;

unsigned strstart;

int longest_match(IPos cur_match, int len, int best_len)

{

    unsigned chain_length = max_chain_length;

    register uch *scan = window + strstart;

    register uch *match;

    register uch scan_end1 = scan[best_len-1];

    register uch scan_end = scan[best_len];

    do {

        ;

        match = window + cur_match;

        if (match[best_len] != scan_end ||

            match[best_len-1] != scan_end1 ||

            *match != *scan ||

            *++match != scan[1]) continue;

            best_len = len;

    } while ( --chain_length != 0);

    return best_len;

}