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loop.c (check_dbra_loop): A store using an address giv for which we have no life information is not...

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* loop.c (check_dbra_loop): A store using an address giv for which
        we have no life information is not reversible.

From-SVN: r25051
This commit is contained in:
Michael Meissner 1999-02-06 00:46:54 +00:00 committed by Jeff Law
parent 5f3db57e52
commit 3603fb785f
2 changed files with 8 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
1999-02-05 Michael Meissner <meissner@cygnus.com>
* loop.c (check_dbra_loop): A store using an address giv for which
we have no life information is not reversible.
Fri Feb 5 17:08:01 1999 Dave Brolley <brolley@cygnus.com>
* function.c (fixup_var_refs): Scan catch_clauses too.

5
gcc/loop.c
View File

@ -7713,8 +7713,9 @@ check_dbra_loop (loop_end, insn_count, loop_start, loop_info)
if (v->giv_type == DEST_REG
&& reg_mentioned_p (v->dest_reg,
XEXP (loop_store_mems, 0))
&& (INSN_LUID (v->insn)
> INSN_LUID (first_loop_store_insn)))
&& (INSN_UID (v->insn) >= max_uid_for_loop
|| (INSN_LUID (v->insn)
> INSN_LUID (first_loop_store_insn))))
reversible_mem_store = 0;
}
}