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diff: defeat gcc's optimization
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -435,7 +435,10 @@ static int *create_J(FILE_and_pos_t ft[2], int nlen[2], off_t *ix[2])
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tok = read_token(&ft[i], tok);
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if (!(tok & TOK_EMPTY)) {
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/* Hash algorithm taken from Robert Sedgewick, Algorithms in C, 3d ed., p 578. */
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hash = hash * 128 - hash + TOK2CHAR(tok);
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/*hash = hash * 128 - hash + TOK2CHAR(tok);
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* gcc insists on optimizing above to "hash * 127 + ...", thus... */
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unsigned o = hash - TOK2CHAR(tok);
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hash = hash * 128 - o; /* we want SPEED here */
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continue;
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}
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if (nlen[i]++ == sz) {
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