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simplify-rtx.c (simplify_plus_minus): Do simplify constants. 

* simplify-rtx.c (simplify_plus_minus): Do simplify constants.
	Delete dead code.

From-SVN: r107840
This commit is contained in:
Alan Modra 2005-12-01 23:48:13 +00:00 committed by Alan Modra
parent 728cdd0872
commit 36686ad6c0
2 changed files with 16 additions and 14 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2005-12-02 Alan Modra <amodra@bigpond.net.au>
* simplify-rtx.c (simplify_plus_minus): Do simplify constants.
Delete dead code.
2005-12-01 Richard Henderson <rth@redhat.com>
* optabs.c (expand_vec_cond_expr): Use EXPAND_NORMAL.

25
gcc/simplify-rtx.c
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@ -2602,7 +2602,7 @@ simplify_plus_minus (enum rtx_code code, enum machine_mode mode, rtx op0,
{
struct simplify_plus_minus_op_data ops[8];
rtx result, tem;
int n_ops = 2, input_ops = 2, input_consts = 0, n_consts;
int n_ops = 2, input_ops = 2;
int first, changed, canonicalized = 0;
int i, j;
@ -2661,7 +2661,6 @@ simplify_plus_minus (enum rtx_code code, enum machine_mode mode, rtx op0,
ops[n_ops].op = XEXP (XEXP (this_op, 0), 1);
ops[n_ops].neg = this_neg;
n_ops++;
input_consts++;
changed = 1;
canonicalized = 1;
}
@ -2699,7 +2698,16 @@ simplify_plus_minus (enum rtx_code code, enum machine_mode mode, rtx op0,
gcc_assert (n_ops >= 2);
if (!canonicalized)
return NULL_RTX;
{
int n_constants = 0;
for (i = 0; i < n_ops; i++)
if (GET_CODE (ops[i].op) == CONST_INT)
n_constants++;
if (n_constants <= 1)
return NULL_RTX;
}
/* If we only have two operands, we can avoid the loops. */
if (n_ops == 2)
@ -2728,11 +2736,6 @@ simplify_plus_minus (enum rtx_code code, enum machine_mode mode, rtx op0,
return simplify_const_binary_operation (code, mode, lhs, rhs);
}
/* Count the number of CONSTs we didn't split above. */
for (i = 0; i < n_ops; i++)
if (GET_CODE (ops[i].op) == CONST)
input_consts++;
/* Now simplify each pair of operands until nothing changes. The first
time through just simplify constants against each other. */
@ -2835,12 +2838,6 @@ simplify_plus_minus (enum rtx_code code, enum machine_mode mode, rtx op0,
n_ops--;
}
/* Count the number of CONSTs that we generated. */
n_consts = 0;
for (i = 0; i < n_ops; i++)
if (GET_CODE (ops[i].op) == CONST)
n_consts++;
/* Put a non-negated operand first, if possible. */
for (i = 0; i < n_ops && ops[i].neg; i++)