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PR middle-end/PR28690 

PR middle-end/PR28690
	* optabs.c (expand_binop): (emit_cmp_and_jump_insns): Allow EQ compares.
	* rtlanal.c (commutative_operand_precedence): Prefer both REG_POINTER
	and MEM_POINTER operands over REG and MEM operands.
	(swap_commutative_operands_p): Change return value to bool.
	* rtl.h: Update the corresponding prototype.
	* tree-ssa-address.c (gen_addr_rtx): Use simplify_gen_binary
	instead of gen_rtx_PLUS.
	* simplify-rtx.c (simplify_plus_minus_op_data_cmp): Change return
	value to bool.  Change function arguments to rtx's and update code
	to match.
	(simplify_plus_minus): Update the simplify_plus_minus_op_data_cmp
	calls to match the new declaration.
	* simplify-rtx.c (simplify_associative_operation): Don't
	reorder simplify_binary_operation arguments.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r126852
This commit is contained in:
Peter Bergner 2007-07-23 11:43:24 -05:00 committed by Peter Bergner
parent de2b3a0771
commit 7e0b4eaea1
6 changed files with 51 additions and 34 deletions
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19
gcc/ChangeLog
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@ -1,3 +1,22 @@
2007-07-23 Peter Bergner <bergner@vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
PR middle-end/PR28690
* optabs.c (expand_binop): (emit_cmp_and_jump_insns): Allow EQ compares.
* rtlanal.c (commutative_operand_precedence): Prefer both REG_POINTER
and MEM_POINTER operands over REG and MEM operands.
(swap_commutative_operands_p): Change return value to bool.
* rtl.h: Update the corresponding prototype.
* tree-ssa-address.c (gen_addr_rtx): Use simplify_gen_binary
instead of gen_rtx_PLUS.
* simplify-rtx.c (simplify_plus_minus_op_data_cmp): Change return
value to bool. Change function arguments to rtx's and update code
to match.
(simplify_plus_minus): Update the simplify_plus_minus_op_data_cmp
calls to match the new declaration.
* simplify-rtx.c (simplify_associative_operation): Don't
reorder simplify_binary_operation arguments.
2007-07-23 Richard Sandiford <richard@codesourcery.com>
* config/mips/mips.c (override_options): Use mips_costs to derive

8
gcc/optabs.c
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@ -4070,9 +4070,11 @@ emit_cmp_and_jump_insns (rtx x, rtx y, enum rtx_code comparison, rtx size,
/* Swap operands and condition to ensure canonical RTL. */
if (swap_commutative_operands_p (x, y))
{
/* If we're not emitting a branch, this means some caller
is out of sync. */
gcc_assert (label);
/* If we're not emitting a branch, callers are required to pass
operands in an order conforming to canonical RTL. We relax this
for commutative comparsions so callers using EQ don't need to do
swapping by hand. */
gcc_assert (label || (comparison == swap_condition (comparison)));
op0 = y, op1 = x;
comparison = swap_condition (comparison);

2
gcc/rtl.h
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@ -1690,7 +1690,7 @@ extern int reg_referenced_p (rtx, rtx);
extern int reg_used_between_p (rtx, rtx, rtx);
extern int reg_set_between_p (rtx, rtx, rtx);
extern int commutative_operand_precedence (rtx);
extern int swap_commutative_operands_p (rtx, rtx);
extern bool swap_commutative_operands_p (rtx, rtx);
extern int modified_between_p (rtx, rtx, rtx);
extern int no_labels_between_p (rtx, rtx);
extern int modified_in_p (rtx, rtx);

22
gcc/rtlanal.c
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@ -2877,9 +2877,9 @@ commutative_operand_precedence (rtx op)
/* Constants always come the second operand. Prefer "nice" constants. */
if (code == CONST_INT)
return -7;
return -8;
if (code == CONST_DOUBLE)
return -6;
return -7;
op = avoid_constant_pool_reference (op);
code = GET_CODE (op);
@ -2887,22 +2887,24 @@ commutative_operand_precedence (rtx op)
{
case RTX_CONST_OBJ:
if (code == CONST_INT)
return -5;
return -6;
if (code == CONST_DOUBLE)
return -4;
return -3;
return -5;
return -4;
case RTX_EXTRA:
/* SUBREGs of objects should come second. */
if (code == SUBREG && OBJECT_P (SUBREG_REG (op)))
return -2;
return -3;
return 0;
case RTX_OBJ:
/* Complex expressions should be the first, so decrease priority
of objects. */
return -1;
of objects. Prefer pointer objects over non pointer objects. */
if ((REG_P (op) && REG_POINTER (op))
|| (MEM_P (op) && MEM_POINTER (op)))
return -1;
return -2;
case RTX_COMM_ARITH:
/* Prefer operands that are themselves commutative to be first.
@ -2929,7 +2931,7 @@ commutative_operand_precedence (rtx op)
/* Return 1 iff it is necessary to swap operands of commutative operation
in order to canonicalize expression. */
int
bool
swap_commutative_operands_p (rtx x, rtx y)
{
return (commutative_operand_precedence (x)

32
gcc/simplify-rtx.c
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@ -52,7 +52,7 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
static rtx neg_const_int (enum machine_mode, rtx);
static bool plus_minus_operand_p (rtx);
static int simplify_plus_minus_op_data_cmp (const void *, const void *);
static bool simplify_plus_minus_op_data_cmp (rtx, rtx);
static rtx simplify_plus_minus (enum rtx_code, enum machine_mode, rtx, rtx);
static rtx simplify_immed_subreg (enum machine_mode, rtx, enum machine_mode,
unsigned int);
@ -1499,16 +1499,12 @@ simplify_associative_operation (enum rtx_code code, enum machine_mode mode,
}
/* Attempt to simplify "(a op b) op c" as "a op (b op c)". */
tem = swap_commutative_operands_p (XEXP (op0, 1), op1)
? simplify_binary_operation (code, mode, op1, XEXP (op0, 1))
: simplify_binary_operation (code, mode, XEXP (op0, 1), op1);
tem = simplify_binary_operation (code, mode, XEXP (op0, 1), op1);
if (tem != 0)
return simplify_gen_binary (code, mode, XEXP (op0, 0), tem);
/* Attempt to simplify "(a op b) op c" as "(a op c) op b". */
tem = swap_commutative_operands_p (XEXP (op0, 0), op1)
? simplify_binary_operation (code, mode, op1, XEXP (op0, 0))
: simplify_binary_operation (code, mode, XEXP (op0, 0), op1);
tem = simplify_binary_operation (code, mode, XEXP (op0, 0), op1);
if (tem != 0)
return simplify_gen_binary (code, mode, tem, XEXP (op0, 1));
}
@ -3313,23 +3309,21 @@ struct simplify_plus_minus_op_data
short neg;
};
static int
simplify_plus_minus_op_data_cmp (const void *p1, const void *p2)
static bool
simplify_plus_minus_op_data_cmp (rtx x, rtx y)
{
const struct simplify_plus_minus_op_data *d1 = p1;
const struct simplify_plus_minus_op_data *d2 = p2;
int result;
result = (commutative_operand_precedence (d2->op)
- commutative_operand_precedence (d1->op));
result = (commutative_operand_precedence (y)
- commutative_operand_precedence (x));
if (result)
return result;
return result > 0;
/* Group together equal REGs to do more simplification. */
if (REG_P (d1->op) && REG_P (d2->op))
return REGNO (d1->op) - REGNO (d2->op);
if (REG_P (x) && REG_P (y))
return REGNO (x) > REGNO (y);
else
return 0;
return false;
}
static rtx
@ -3473,14 +3467,14 @@ simplify_plus_minus (enum rtx_code code, enum machine_mode mode, rtx op0,
{
struct simplify_plus_minus_op_data save;
j = i - 1;
if (simplify_plus_minus_op_data_cmp (&ops[j], &ops[i]) < 0)
if (!simplify_plus_minus_op_data_cmp (ops[j].op, ops[i].op))
continue;
canonicalized = 1;
save = ops[i];
do
ops[j + 1] = ops[j];
while (j-- && simplify_plus_minus_op_data_cmp (&ops[j], &save) > 0);
while (j-- && simplify_plus_minus_op_data_cmp (ops[j].op, save.op));
ops[j + 1] = save;
}

2
gcc/tree-ssa-address.c
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@ -125,7 +125,7 @@ gen_addr_rtx (rtx symbol, rtx base, rtx index, rtx step, rtx offset,
if (base)
{
if (*addr)
*addr = gen_rtx_PLUS (Pmode, *addr, base);
*addr = simplify_gen_binary (PLUS, Pmode, base, *addr);
else
*addr = base;
}