double-int.c (double_int_multiple_of): New function.

2012-06-22  Bill Schmidt  <wschmidt@linux.ibm.com>

	* double-int.c (double_int_multiple_of): New function.
	* double-int.h (double_int_multiple_of): New decl.
	* tree-ssa-loop-ivopts.c (add_cost, zero_cost): Remove undefs.
	(mbc_entry_hash): New forward decl.
	(mbc_entry_eq): Likewise.
	(zero_cost): Change to no_cost.
	(mult_costs): New static var.
	(cost_tables_exist): Likewise.
	(initialize_costs): New function.
	(finalize_costs): Likewise.
	(tree_ssa_iv_optimize_init): Call initialize_costs.
	(add_cost): Change to add_regs_cost; distinguish costs by speed.
	(multiply_regs_cost): New function.
	(add_const_cost): Likewise.
	(extend_or_trunc_reg_cost): Likewise.
	(negate_reg_cost): Likewise.
	(multiply_by_cost): Change to multiply_by_const_cost; distinguish
	costs by speed.
	(get_address_cost): Change add_cost to add_regs_cost; change
	multiply_by_cost to multiply_by_const_cost.
	(force_expr_to_var_cost): Change zero_cost to no_cost; change
	add_cost to add_regs_cost; change multiply_by_cost to
	multiply_by_const_cost.
	(split_cost): Change zero_cost to no_cost.
	(ptr_difference_cost): Likewise.
	(difference_cost): Change zero_cost to no_cost; change multiply_by_cost
	to multiply_by_const_cost.
	(get_computation_cost_at): Change add_cost to add_regs_cost; change
	multiply_by_cost to multiply_by_const_cost.
	(determine_use_iv_cost_generic): Change zero_cost to no_cost.
	(determine_iv_cost): Change add_cost to add_regs_cost.
	(iv_ca_new): Change zero_cost to no_cost.
	(tree_ssa_iv_optimize_finalize): Call finalize_costs.
	* tree-ssa-address.c (most_expensive_mult_to_index): Change
	multiply_by_cost to multiply_by_const_cost.
	* tree-flow.h (multiply_by_cost): Change to multiply_by_const_cost.
	(add_regs_cost): New decl.
	(multiply_regs_cost): Likewise.
	(add_const_cost): Likewise.
	(extend_or_trunc_reg_cost): Likewise.
	(negate_reg_cost): Likewise.

From-SVN: r188891
This commit is contained in:
Bill Schmidt 2012-06-22 16:37:40 +00:00 committed by William Schmidt
parent 62e0a1ed43
commit 7735d6c72e
6 changed files with 286 additions and 44 deletions

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@ -1,3 +1,47 @@
2012-06-22 Bill Schmidt <wschmidt@linux.ibm.com>
* double-int.c (double_int_multiple_of): New function.
* double-int.h (double_int_multiple_of): New decl.
* tree-ssa-loop-ivopts.c (add_cost, zero_cost): Remove undefs.
(mbc_entry_hash): New forward decl.
(mbc_entry_eq): Likewise.
(zero_cost): Change to no_cost.
(mult_costs): New static var.
(cost_tables_exist): Likewise.
(initialize_costs): New function.
(finalize_costs): Likewise.
(tree_ssa_iv_optimize_init): Call initialize_costs.
(add_cost): Change to add_regs_cost; distinguish costs by speed.
(multiply_regs_cost): New function.
(add_const_cost): Likewise.
(extend_or_trunc_reg_cost): Likewise.
(negate_reg_cost): Likewise.
(multiply_by_cost): Change to multiply_by_const_cost; distinguish
costs by speed.
(get_address_cost): Change add_cost to add_regs_cost; change
multiply_by_cost to multiply_by_const_cost.
(force_expr_to_var_cost): Change zero_cost to no_cost; change
add_cost to add_regs_cost; change multiply_by_cost to
multiply_by_const_cost.
(split_cost): Change zero_cost to no_cost.
(ptr_difference_cost): Likewise.
(difference_cost): Change zero_cost to no_cost; change multiply_by_cost
to multiply_by_const_cost.
(get_computation_cost_at): Change add_cost to add_regs_cost; change
multiply_by_cost to multiply_by_const_cost.
(determine_use_iv_cost_generic): Change zero_cost to no_cost.
(determine_iv_cost): Change add_cost to add_regs_cost.
(iv_ca_new): Change zero_cost to no_cost.
(tree_ssa_iv_optimize_finalize): Call finalize_costs.
* tree-ssa-address.c (most_expensive_mult_to_index): Change
multiply_by_cost to multiply_by_const_cost.
* tree-flow.h (multiply_by_cost): Change to multiply_by_const_cost.
(add_regs_cost): New decl.
(multiply_regs_cost): Likewise.
(add_const_cost): Likewise.
(extend_or_trunc_reg_cost): Likewise.
(negate_reg_cost): Likewise.
2012-06-22 Richard Guenther <rguenther@suse.de>
Merge from graphite branch

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@ -865,6 +865,26 @@ double_int_umod (double_int a, double_int b, unsigned code)
return double_int_mod (a, b, true, code);
}
/* Return TRUE iff PRODUCT is an integral multiple of FACTOR, and return
the multiple in *MULTIPLE. Otherwise return FALSE and leave *MULTIPLE
unchanged. */
bool
double_int_multiple_of (double_int product, double_int factor,
bool unsigned_p, double_int *multiple)
{
double_int remainder;
double_int quotient = double_int_divmod (product, factor, unsigned_p,
TRUNC_DIV_EXPR, &remainder);
if (double_int_zero_p (remainder))
{
*multiple = quotient;
return true;
}
return false;
}
/* Set BITPOS bit in A. */
double_int
double_int_setbit (double_int a, unsigned bitpos)

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@ -150,6 +150,8 @@ double_int double_int_divmod (double_int, double_int, bool, unsigned, double_int
double_int double_int_sdivmod (double_int, double_int, unsigned, double_int *);
double_int double_int_udivmod (double_int, double_int, unsigned, double_int *);
bool double_int_multiple_of (double_int, double_int, bool, double_int *);
double_int double_int_setbit (double_int, unsigned);
int double_int_ctz (double_int);

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@ -810,7 +810,12 @@ bool expr_invariant_in_loop_p (struct loop *, tree);
bool stmt_invariant_in_loop_p (struct loop *, gimple);
bool multiplier_allowed_in_address_p (HOST_WIDE_INT, enum machine_mode,
addr_space_t);
unsigned multiply_by_cost (HOST_WIDE_INT, enum machine_mode, bool);
unsigned multiply_by_const_cost (HOST_WIDE_INT, enum machine_mode, bool);
unsigned add_regs_cost (enum machine_mode, bool);
unsigned multiply_regs_cost (enum machine_mode, bool);
unsigned add_const_cost (enum machine_mode, bool);
unsigned extend_or_trunc_reg_cost (tree, tree, bool);
unsigned negate_reg_cost (enum machine_mode, bool);
bool may_be_nonaddressable_p (tree expr);
/* In tree-ssa-threadupdate.c. */

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@ -556,7 +556,7 @@ most_expensive_mult_to_index (tree type, struct mem_address *parts,
|| !multiplier_allowed_in_address_p (coef, TYPE_MODE (type), as))
continue;
acost = multiply_by_cost (coef, address_mode, speed);
acost = multiply_by_const_cost (coef, address_mode, speed);
if (acost > best_mult_cost)
{

View File

@ -89,12 +89,10 @@ along with GCC; see the file COPYING3. If not see
#include "target.h"
#include "tree-inline.h"
#include "tree-ssa-propagate.h"
/* FIXME: add_cost and zero_cost defined in exprmed.h conflict with local uses.
*/
#include "expmed.h"
#undef add_cost
#undef zero_cost
static hashval_t mbc_entry_hash (const void *);
static int mbc_entry_eq (const void*, const void *);
/* FIXME: Expressions are expanded to RTL in this pass to determine the
cost of different addressing modes. This should be moved to a TBD
@ -162,7 +160,7 @@ typedef struct
complex expressions and addressing modes). */
} comp_cost;
static const comp_cost zero_cost = {0, 0};
static const comp_cost no_cost = {0, 0};
static const comp_cost infinite_cost = {INFTY, INFTY};
/* The candidate - cost pair. */
@ -386,6 +384,11 @@ struct iv_ca_delta
static VEC(tree,heap) *decl_rtl_to_reset;
/* Cached costs for multiplies by constants, and a flag to indicate
when they're valid. */
static htab_t mult_costs[2];
static bool cost_tables_exist = false;
static comp_cost force_expr_to_var_cost (tree, bool);
/* Number of uses recorded in DATA. */
@ -851,6 +854,26 @@ htab_inv_expr_hash (const void *ent)
return expr->hash;
}
/* Allocate data structures for the cost model. */
static void
initialize_costs (void)
{
mult_costs[0] = htab_create (100, mbc_entry_hash, mbc_entry_eq, free);
mult_costs[1] = htab_create (100, mbc_entry_hash, mbc_entry_eq, free);
cost_tables_exist = true;
}
/* Release data structures for the cost model. */
static void
finalize_costs (void)
{
cost_tables_exist = false;
htab_delete (mult_costs[0]);
htab_delete (mult_costs[1]);
}
/* Initializes data structures used by the iv optimization pass, stored
in DATA. */
@ -869,6 +892,8 @@ tree_ssa_iv_optimize_init (struct ivopts_data *data)
htab_inv_expr_eq, free);
data->inv_expr_id = 0;
decl_rtl_to_reset = VEC_alloc (tree, heap, 20);
initialize_costs ();
}
/* Returns a memory object to that EXPR points. In case we are able to
@ -3057,15 +3082,15 @@ adjust_setup_cost (struct ivopts_data *data, unsigned cost)
/* Returns cost of addition in MODE. */
static unsigned
add_cost (enum machine_mode mode, bool speed)
unsigned
add_regs_cost (enum machine_mode mode, bool speed)
{
static unsigned costs[NUM_MACHINE_MODES];
static unsigned costs[NUM_MACHINE_MODES][2];
rtx seq;
unsigned cost;
if (costs[mode])
return costs[mode];
if (costs[mode][speed])
return costs[mode][speed];
start_sequence ();
force_operand (gen_rtx_fmt_ee (PLUS, mode,
@ -3079,7 +3104,7 @@ add_cost (enum machine_mode mode, bool speed)
if (!cost)
cost = 1;
costs[mode] = cost;
costs[mode][speed] = cost;
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "Addition in %s costs %d\n",
@ -3087,6 +3112,148 @@ add_cost (enum machine_mode mode, bool speed)
return cost;
}
/* Returns cost of multiplication in MODE. */
unsigned
multiply_regs_cost (enum machine_mode mode, bool speed)
{
static unsigned costs[NUM_MACHINE_MODES][2];
rtx seq;
unsigned cost;
if (costs[mode][speed])
return costs[mode][speed];
start_sequence ();
force_operand (gen_rtx_fmt_ee (MULT, mode,
gen_raw_REG (mode, LAST_VIRTUAL_REGISTER + 1),
gen_raw_REG (mode, LAST_VIRTUAL_REGISTER + 2)),
NULL_RTX);
seq = get_insns ();
end_sequence ();
cost = seq_cost (seq, speed);
if (!cost)
cost = 1;
costs[mode][speed] = cost;
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "Multiplication in %s costs %d\n",
GET_MODE_NAME (mode), cost);
return cost;
}
/* Returns cost of addition with a constant in MODE. */
unsigned
add_const_cost (enum machine_mode mode, bool speed)
{
static unsigned costs[NUM_MACHINE_MODES][2];
rtx seq;
unsigned cost;
if (costs[mode][speed])
return costs[mode][speed];
/* Arbitrarily generate insns for x + 2, as the exact constant
shouldn't matter. */
start_sequence ();
force_operand (gen_rtx_fmt_ee (PLUS, mode,
gen_raw_REG (mode, LAST_VIRTUAL_REGISTER + 1),
gen_int_mode (2, mode)),
NULL_RTX);
seq = get_insns ();
end_sequence ();
cost = seq_cost (seq, speed);
if (!cost)
cost = 1;
costs[mode][speed] = cost;
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "Addition to constant in %s costs %d\n",
GET_MODE_NAME (mode), cost);
return cost;
}
/* Returns cost of extend or truncate in MODE. */
unsigned
extend_or_trunc_reg_cost (tree type_to, tree type_from, bool speed)
{
static unsigned costs[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
rtx seq;
unsigned cost;
enum machine_mode mode_to = TYPE_MODE (type_to);
enum machine_mode mode_from = TYPE_MODE (type_from);
tree size_to = TYPE_SIZE (type_to);
tree size_from = TYPE_SIZE (type_from);
enum rtx_code code;
gcc_assert (TREE_CODE (size_to) == INTEGER_CST
&& TREE_CODE (size_from) == INTEGER_CST);
if (costs[mode_to][mode_from][speed])
return costs[mode_to][mode_from][speed];
if (tree_int_cst_lt (size_to, size_from))
code = TRUNCATE;
else if (TYPE_UNSIGNED (type_to))
code = ZERO_EXTEND;
else
code = SIGN_EXTEND;
start_sequence ();
gen_rtx_fmt_e (code, mode_to,
gen_raw_REG (mode_from, LAST_VIRTUAL_REGISTER + 1));
seq = get_insns ();
end_sequence ();
cost = seq_cost (seq, speed);
if (!cost)
cost = 1;
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "Conversion from %s to %s costs %d\n",
GET_MODE_NAME (mode_to), GET_MODE_NAME (mode_from), cost);
costs[mode_to][mode_from][speed] = cost;
return cost;
}
/* Returns cost of negation in MODE. */
unsigned
negate_reg_cost (enum machine_mode mode, bool speed)
{
static unsigned costs[NUM_MACHINE_MODES][2];
rtx seq;
unsigned cost;
if (costs[mode][speed])
return costs[mode][speed];
start_sequence ();
force_operand (gen_rtx_fmt_e (NEG, mode,
gen_raw_REG (mode, LAST_VIRTUAL_REGISTER + 1)),
NULL_RTX);
seq = get_insns ();
end_sequence ();
cost = seq_cost (seq, speed);
if (!cost)
cost = 1;
costs[mode][speed] = cost;
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "Negation in %s costs %d\n",
GET_MODE_NAME (mode), cost);
return cost;
}
/* Entry in a hashtable of already known costs for multiplication. */
struct mbc_entry
{
@ -3120,19 +3287,19 @@ mbc_entry_eq (const void *entry1, const void *entry2)
/* Returns cost of multiplication by constant CST in MODE. */
unsigned
multiply_by_cost (HOST_WIDE_INT cst, enum machine_mode mode, bool speed)
multiply_by_const_cost (HOST_WIDE_INT cst, enum machine_mode mode, bool speed)
{
static htab_t costs;
struct mbc_entry **cached, act;
rtx seq;
unsigned cost;
if (!costs)
costs = htab_create (100, mbc_entry_hash, mbc_entry_eq, free);
gcc_assert (cost_tables_exist);
act.mode = mode;
act.cst = cst;
cached = (struct mbc_entry **) htab_find_slot (costs, &act, INSERT);
cached = (struct mbc_entry **)
htab_find_slot (mult_costs[speed], &act, INSERT);
if (*cached)
return (*cached)->cost;
@ -3418,7 +3585,7 @@ get_address_cost (bool symbol_present, bool var_present,
If VAR_PRESENT is true, try whether the mode with
SYMBOL_PRESENT = false is cheaper even with cost of addition, and
if this is the case, use it. */
add_c = add_cost (address_mode, speed);
add_c = add_regs_cost (address_mode, speed);
for (i = 0; i < 8; i++)
{
var_p = i & 1;
@ -3499,10 +3666,10 @@ get_address_cost (bool symbol_present, bool var_present,
&& multiplier_allowed_in_address_p (ratio, mem_mode, as));
if (ratio != 1 && !ratio_p)
cost += multiply_by_cost (ratio, address_mode, speed);
cost += multiply_by_const_cost (ratio, address_mode, speed);
if (s_offset && !offset_p && !symbol_present)
cost += add_cost (address_mode, speed);
cost += add_regs_cost (address_mode, speed);
if (may_autoinc)
*may_autoinc = autoinc;
@ -3601,7 +3768,7 @@ force_expr_to_var_cost (tree expr, bool speed)
STRIP_NOPS (expr);
if (SSA_VAR_P (expr))
return zero_cost;
return no_cost;
if (is_gimple_min_invariant (expr))
{
@ -3633,12 +3800,12 @@ force_expr_to_var_cost (tree expr, bool speed)
STRIP_NOPS (op1);
if (is_gimple_val (op0))
cost0 = zero_cost;
cost0 = no_cost;
else
cost0 = force_expr_to_var_cost (op0, speed);
if (is_gimple_val (op1))
cost1 = zero_cost;
cost1 = no_cost;
else
cost1 = force_expr_to_var_cost (op1, speed);
@ -3650,11 +3817,11 @@ force_expr_to_var_cost (tree expr, bool speed)
op1 = NULL_TREE;
if (is_gimple_val (op0))
cost0 = zero_cost;
cost0 = no_cost;
else
cost0 = force_expr_to_var_cost (op0, speed);
cost1 = zero_cost;
cost1 = no_cost;
break;
default:
@ -3669,7 +3836,7 @@ force_expr_to_var_cost (tree expr, bool speed)
case PLUS_EXPR:
case MINUS_EXPR:
case NEGATE_EXPR:
cost = new_cost (add_cost (mode, speed), 0);
cost = new_cost (add_regs_cost (mode, speed), 0);
if (TREE_CODE (expr) != NEGATE_EXPR)
{
tree mult = NULL_TREE;
@ -3689,9 +3856,11 @@ force_expr_to_var_cost (tree expr, bool speed)
case MULT_EXPR:
if (cst_and_fits_in_hwi (op0))
cost = new_cost (multiply_by_cost (int_cst_value (op0), mode, speed), 0);
cost = new_cost (multiply_by_const_cost (int_cst_value (op0),
mode, speed), 0);
else if (cst_and_fits_in_hwi (op1))
cost = new_cost (multiply_by_cost (int_cst_value (op1), mode, speed), 0);
cost = new_cost (multiply_by_const_cost (int_cst_value (op1),
mode, speed), 0);
else
return new_cost (target_spill_cost [speed], 0);
break;
@ -3766,12 +3935,12 @@ split_address_cost (struct ivopts_data *data,
{
*symbol_present = true;
*var_present = false;
return zero_cost;
return no_cost;
}
*symbol_present = false;
*var_present = true;
return zero_cost;
return no_cost;
}
/* Estimates cost of expressing difference of addresses E1 - E2 as
@ -3796,7 +3965,7 @@ ptr_difference_cost (struct ivopts_data *data,
*offset += diff;
*symbol_present = false;
*var_present = false;
return zero_cost;
return no_cost;
}
if (integer_zerop (e2))
@ -3846,7 +4015,7 @@ difference_cost (struct ivopts_data *data,
if (operand_equal_p (e1, e2, 0))
{
*var_present = false;
return zero_cost;
return no_cost;
}
*var_present = true;
@ -3857,7 +4026,7 @@ difference_cost (struct ivopts_data *data,
if (integer_zerop (e1))
{
comp_cost cost = force_var_cost (data, e2, depends_on);
cost.cost += multiply_by_cost (-1, mode, data->speed);
cost.cost += multiply_by_const_cost (-1, mode, data->speed);
return cost;
}
@ -4168,7 +4337,7 @@ get_computation_cost_at (struct ivopts_data *data,
&symbol_present, &var_present,
&offset, depends_on));
cost.cost /= avg_loop_niter (data->current_loop);
cost.cost += add_cost (TYPE_MODE (ctype), data->speed);
cost.cost += add_regs_cost (TYPE_MODE (ctype), data->speed);
}
if (inv_expr_id)
@ -4201,7 +4370,7 @@ get_computation_cost_at (struct ivopts_data *data,
if (!symbol_present && !var_present && !offset)
{
if (ratio != 1)
cost.cost += multiply_by_cost (ratio, TYPE_MODE (ctype), speed);
cost.cost += multiply_by_const_cost (ratio, TYPE_MODE (ctype), speed);
return cost;
}
@ -4209,18 +4378,18 @@ get_computation_cost_at (struct ivopts_data *data,
are added once to the variable, if present. */
if (var_present && (symbol_present || offset))
cost.cost += adjust_setup_cost (data,
add_cost (TYPE_MODE (ctype), speed));
add_regs_cost (TYPE_MODE (ctype), speed));
/* Having offset does not affect runtime cost in case it is added to
symbol, but it increases complexity. */
if (offset)
cost.complexity++;
cost.cost += add_cost (TYPE_MODE (ctype), speed);
cost.cost += add_regs_cost (TYPE_MODE (ctype), speed);
aratio = ratio > 0 ? ratio : -ratio;
if (aratio != 1)
cost.cost += multiply_by_cost (aratio, TYPE_MODE (ctype), speed);
cost.cost += multiply_by_const_cost (aratio, TYPE_MODE (ctype), speed);
return cost;
fallback:
@ -4277,7 +4446,7 @@ determine_use_iv_cost_generic (struct ivopts_data *data,
if (cand->pos == IP_ORIGINAL
&& cand->incremented_at == use->stmt)
{
set_use_iv_cost (data, use, cand, zero_cost, NULL, NULL_TREE,
set_use_iv_cost (data, use, cand, no_cost, NULL, NULL_TREE,
ERROR_MARK, -1);
return true;
}
@ -5066,7 +5235,7 @@ determine_iv_cost (struct ivopts_data *data, struct iv_cand *cand)
or a const set. */
if (cost_base.cost == 0)
cost_base.cost = COSTS_N_INSNS (1);
cost_step = add_cost (TYPE_MODE (TREE_TYPE (base)), data->speed);
cost_step = add_regs_cost (TYPE_MODE (TREE_TYPE (base)), data->speed);
cost = cost_step + adjust_setup_cost (data, cost_base.cost);
@ -5561,10 +5730,10 @@ iv_ca_new (struct ivopts_data *data)
nw->cands = BITMAP_ALLOC (NULL);
nw->n_cands = 0;
nw->n_regs = 0;
nw->cand_use_cost = zero_cost;
nw->cand_use_cost = no_cost;
nw->cand_cost = 0;
nw->n_invariant_uses = XCNEWVEC (unsigned, data->max_inv_id + 1);
nw->cost = zero_cost;
nw->cost = no_cost;
nw->used_inv_expr = XCNEWVEC (unsigned, data->inv_expr_id + 1);
nw->num_used_inv_expr = 0;
@ -6638,6 +6807,8 @@ tree_ssa_iv_optimize_finalize (struct ivopts_data *data)
VEC_free (iv_use_p, heap, data->iv_uses);
VEC_free (iv_cand_p, heap, data->iv_candidates);
htab_delete (data->inv_expr_tab);
finalize_costs ();
}
/* Returns true if the loop body BODY includes any function calls. */