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(find_best_addr): Make sure folded address better before using.

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From-SVN: r10873
This commit is contained in:
Richard Kenner 1995-12-27 15:25:35 -05:00
parent 8e1e2862ad
commit 8c87f107ff
1 changed files with 15 additions and 3 deletions
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18
gcc/cse.c
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@ -2660,9 +2660,21 @@ find_best_addr (insn, loc)
sometimes simplify the expression. Many simplifications
will not be valid, but some, usually applying the associative rule, will
be valid and produce better code. */
if (GET_CODE (addr) != REG
&& validate_change (insn, loc, fold_rtx (addr, insn), 0))
addr = *loc;
if (GET_CODE (addr) != REG)
{
rtx folded = fold_rtx (copy_rtx (addr), NULL_RTX);
if (1
#ifdef ADDRESS_COST
&& (ADDRESS_COST (folded) < ADDRESS_COST (addr)
|| (ADDRESS_COST (folded) == ADDRESS_COST (addr)
&& rtx_cost (folded) > rtx_cost (addr)))
#else
&& rtx_cost (folded) < rtx_cost (addr)
#endif
&& validate_change (insn, loc, folded, 0))
addr = folded;
}
/* If this address is not in the hash table, we can't look for equivalences
of the whole address. Also, ignore if volatile. */