/* Loop Vectorization
- Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
Contributed by Dorit Naishlos <dorit@il.ibm.com>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* Loop Vectorization Pass.
To vectorize stmt S2, the vectorizer first finds the stmt that defines
the operand 'b' (S1), and gets the relevant vector def 'vb' from the
- vector stmt VS1 pointed by STMT_VINFO_VEC_STMT (stmt_info (S1)). The
+ vector stmt VS1 pointed to by STMT_VINFO_VEC_STMT (stmt_info (S1)). The
resulting sequence would be:
VS1: vb = px[i];
#include "cfgloop.h"
#include "cfglayout.h"
#include "expr.h"
+#include "recog.h"
#include "optabs.h"
+#include "params.h"
#include "toplev.h"
#include "tree-chrec.h"
#include "tree-data-ref.h"
/*************************************************************************
Simple Loop Peeling Utilities
*************************************************************************/
-static struct loop *slpeel_tree_duplicate_loop_to_edge_cfg
- (struct loop *, struct loops *, edge);
static void slpeel_update_phis_for_duplicate_loop
(struct loop *, struct loop *, bool after);
static void slpeel_update_phi_nodes_for_guard1
to mark that it's uninitialized. */
enum verbosity_levels vect_verbosity_level = MAX_VERBOSITY_LEVEL;
-/* Number of loops, at the beginning of vectorization. */
-unsigned int vect_loops_num;
-
/* Loop location. */
static LOC vect_loop_location;
+
+/* Bitmap of virtual variables to be renamed. */
+bitmap vect_memsyms_to_rename;
\f
/*************************************************************************
Simple Loop Peeling Utilities
for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
{
stmt = bsi_stmt (bsi);
- FOR_EACH_SSA_USE_OPERAND (use_p, stmt, iter,
- (SSA_OP_ALL_USES | SSA_OP_ALL_KILLS))
+ FOR_EACH_SSA_USE_OPERAND (use_p, stmt, iter, SSA_OP_ALL_USES)
rename_use_op (use_p);
}
tree def;
edge orig_loop_latch = loop_latch_edge (orig_loop);
edge orig_entry_e = loop_preheader_edge (orig_loop);
- edge new_loop_exit_e = new_loop->single_exit;
+ edge new_loop_exit_e = single_exit (new_loop);
edge new_loop_entry_e = loop_preheader_edge (new_loop);
edge entry_arg_e = (after ? orig_loop_latch : orig_entry_e);
basic_block orig_bb = loop->header;
edge new_exit_e;
tree current_new_name;
+ tree name;
/* Create new bb between loop and new_merge_bb. */
- *new_exit_bb = split_edge (loop->single_exit);
- add_bb_to_loop (*new_exit_bb, loop->outer);
+ *new_exit_bb = split_edge (single_exit (loop));
new_exit_e = EDGE_SUCC (*new_exit_bb, 0);
orig_phi && update_phi;
orig_phi = PHI_CHAIN (orig_phi), update_phi = PHI_CHAIN (update_phi))
{
+ /* Virtual phi; Mark it for renaming. We actually want to call
+ mar_sym_for_renaming, but since all ssa renaming datastructures
+ are going to be freed before we get to call ssa_upate, we just
+ record this name for now in a bitmap, and will mark it for
+ renaming later. */
+ name = PHI_RESULT (orig_phi);
+ if (!is_gimple_reg (SSA_NAME_VAR (name)))
+ bitmap_set_bit (vect_memsyms_to_rename, DECL_UID (SSA_NAME_VAR (name)));
+
/** 1. Handle new-merge-point phis **/
/* 1.1. Generate new phi node in NEW_MERGE_BB: */
/** 2. Handle loop-closed-ssa-form phis **/
+ if (!is_gimple_reg (PHI_RESULT (orig_phi)))
+ continue;
+
/* 2.1. Generate new phi node in NEW_EXIT_BB: */
new_phi = create_phi_node (SSA_NAME_VAR (PHI_RESULT (orig_phi)),
*new_exit_bb);
/* 2.2. NEW_EXIT_BB has one incoming edge: the exit-edge of the loop. */
- add_phi_arg (new_phi, loop_arg, loop->single_exit);
+ add_phi_arg (new_phi, loop_arg, single_exit (loop));
/* 2.3. Update phi in successor of NEW_EXIT_BB: */
gcc_assert (PHI_ARG_DEF_FROM_EDGE (update_phi2, new_exit_e) == loop_arg);
tree arg;
/* Create new bb between loop and new_merge_bb. */
- *new_exit_bb = split_edge (loop->single_exit);
- add_bb_to_loop (*new_exit_bb, loop->outer);
+ *new_exit_bb = split_edge (single_exit (loop));
new_exit_e = EDGE_SUCC (*new_exit_bb, 0);
{
orig_phi = update_phi;
orig_def = PHI_ARG_DEF_FROM_EDGE (orig_phi, e);
+ /* This loop-closed-phi actually doesn't represent a use
+ out of the loop - the phi arg is a constant. */
+ if (TREE_CODE (orig_def) != SSA_NAME)
+ continue;
orig_def_new_name = get_current_def (orig_def);
arg = NULL_TREE;
*new_exit_bb);
/* 2.2. NEW_EXIT_BB has one incoming edge: the exit-edge of the loop. */
- add_phi_arg (new_phi, loop_arg, loop->single_exit);
+ add_phi_arg (new_phi, loop_arg, single_exit (loop));
/* 2.3. Update phi in successor of NEW_EXIT_BB: */
gcc_assert (PHI_ARG_DEF_FROM_EDGE (update_phi2, new_exit_e) == loop_arg);
{
tree indx_before_incr, indx_after_incr, cond_stmt, cond;
tree orig_cond;
- edge exit_edge = loop->single_exit;
+ edge exit_edge = single_exit (loop);
block_stmt_iterator loop_cond_bsi;
block_stmt_iterator incr_bsi;
bool insert_after;
- tree begin_label = tree_block_label (loop->latch);
- tree exit_label = tree_block_label (loop->single_exit->dest);
tree init = build_int_cst (TREE_TYPE (niters), 0);
tree step = build_int_cst (TREE_TYPE (niters), 1);
- tree then_label;
- tree else_label;
LOC loop_loc;
orig_cond = get_loop_exit_condition (loop);
&incr_bsi, insert_after, &indx_before_incr, &indx_after_incr);
if (exit_edge->flags & EDGE_TRUE_VALUE) /* 'then' edge exits the loop. */
- {
- cond = build2 (GE_EXPR, boolean_type_node, indx_after_incr, niters);
- then_label = build1 (GOTO_EXPR, void_type_node, exit_label);
- else_label = build1 (GOTO_EXPR, void_type_node, begin_label);
- }
+ cond = build2 (GE_EXPR, boolean_type_node, indx_after_incr, niters);
else /* 'then' edge loops back. */
- {
- cond = build2 (LT_EXPR, boolean_type_node, indx_after_incr, niters);
- then_label = build1 (GOTO_EXPR, void_type_node, begin_label);
- else_label = build1 (GOTO_EXPR, void_type_node, exit_label);
- }
+ cond = build2 (LT_EXPR, boolean_type_node, indx_after_incr, niters);
cond_stmt = build3 (COND_EXPR, TREE_TYPE (orig_cond), cond,
- then_label, else_label);
+ NULL_TREE, NULL_TREE);
bsi_insert_before (&loop_cond_bsi, cond_stmt, BSI_SAME_STMT);
/* Remove old loop exit test: */
- bsi_remove (&loop_cond_bsi);
+ bsi_remove (&loop_cond_bsi, true);
loop_loc = find_loop_location (loop);
if (dump_file && (dump_flags & TDF_DETAILS))
on E which is either the entry or exit of LOOP. */
static struct loop *
-slpeel_tree_duplicate_loop_to_edge_cfg (struct loop *loop, struct loops *loops,
- edge e)
+slpeel_tree_duplicate_loop_to_edge_cfg (struct loop *loop, edge e)
{
struct loop *new_loop;
basic_block *new_bbs, *bbs;
bool was_imm_dom;
basic_block exit_dest;
tree phi, phi_arg;
+ edge exit, new_exit;
- at_exit = (e == loop->single_exit);
+ at_exit = (e == single_exit (loop));
if (!at_exit && e != loop_preheader_edge (loop))
return NULL;
}
/* Generate new loop structure. */
- new_loop = duplicate_loop (loops, loop, loop->outer);
+ new_loop = duplicate_loop (loop, loop_outer (loop));
if (!new_loop)
{
free (bbs);
return NULL;
}
- exit_dest = loop->single_exit->dest;
+ exit_dest = single_exit (loop)->dest;
was_imm_dom = (get_immediate_dominator (CDI_DOMINATORS,
exit_dest) == loop->header ?
true : false);
- new_bbs = xmalloc (sizeof (basic_block) * loop->num_nodes);
+ new_bbs = XNEWVEC (basic_block, loop->num_nodes);
+ exit = single_exit (loop);
copy_bbs (bbs, loop->num_nodes, new_bbs,
- &loop->single_exit, 1, &new_loop->single_exit, NULL);
+ &exit, 1, &new_exit, NULL,
+ e->src);
/* Duplicating phi args at exit bbs as coming
also from exit of duplicated loop. */
for (phi = phi_nodes (exit_dest); phi; phi = PHI_CHAIN (phi))
{
- phi_arg = PHI_ARG_DEF_FROM_EDGE (phi, loop->single_exit);
+ phi_arg = PHI_ARG_DEF_FROM_EDGE (phi, single_exit (loop));
if (phi_arg)
{
edge new_loop_exit_edge;
{
block_stmt_iterator bsi;
edge new_e, enter_e;
- tree cond_stmt, then_label, else_label;
+ tree cond_stmt;
enter_e = EDGE_SUCC (guard_bb, 0);
enter_e->flags &= ~EDGE_FALLTHRU;
enter_e->flags |= EDGE_FALSE_VALUE;
bsi = bsi_last (guard_bb);
- then_label = build1 (GOTO_EXPR, void_type_node,
- tree_block_label (exit_bb));
- else_label = build1 (GOTO_EXPR, void_type_node,
- tree_block_label (enter_e->dest));
cond_stmt = build3 (COND_EXPR, void_type_node, cond,
- then_label, else_label);
+ NULL_TREE, NULL_TREE);
bsi_insert_after (&bsi, cond_stmt, BSI_NEW_STMT);
/* Add new edge to connect guard block to the merge/loop-exit block. */
new_e = make_edge (guard_bb, exit_bb, EDGE_TRUE_VALUE);
bool
slpeel_can_duplicate_loop_p (struct loop *loop, edge e)
{
- edge exit_e = loop->single_exit;
+ edge exit_e = single_exit (loop);
edge entry_e = loop_preheader_edge (loop);
tree orig_cond = get_loop_exit_condition (loop);
block_stmt_iterator loop_exit_bsi = bsi_last (exit_e->src);
if (loop->inner
/* All loops have an outer scope; the only case loop->outer is NULL is for
the function itself. */
- || !loop->outer
+ || !loop_outer (loop)
|| loop->num_nodes != 2
|| !empty_block_p (loop->latch)
- || !loop->single_exit
+ || !single_exit (loop)
/* Verify that new loop exit condition can be trivially modified. */
|| (!orig_cond || orig_cond != bsi_stmt (loop_exit_bsi))
|| (e != exit_e && e != entry_e))
slpeel_verify_cfg_after_peeling (struct loop *first_loop,
struct loop *second_loop)
{
- basic_block loop1_exit_bb = first_loop->single_exit->dest;
+ basic_block loop1_exit_bb = single_exit (first_loop)->dest;
basic_block loop2_entry_bb = loop_preheader_edge (second_loop)->src;
basic_block loop1_entry_bb = loop_preheader_edge (first_loop)->src;
*/
struct loop*
-slpeel_tree_peel_loop_to_edge (struct loop *loop, struct loops *loops,
+slpeel_tree_peel_loop_to_edge (struct loop *loop,
edge e, tree first_niters,
- tree niters, bool update_first_loop_count)
+ tree niters, bool update_first_loop_count,
+ unsigned int th)
{
struct loop *new_loop = NULL, *first_loop, *second_loop;
edge skip_e;
basic_block bb_before_first_loop;
basic_block bb_between_loops;
basic_block new_exit_bb;
- edge exit_e = loop->single_exit;
+ edge exit_e = single_exit (loop);
LOC loop_loc;
if (!slpeel_can_duplicate_loop_p (loop, e))
orig_exit_bb:
*/
- if (!(new_loop = slpeel_tree_duplicate_loop_to_edge_cfg (loop, loops, e)))
+ if (!(new_loop = slpeel_tree_duplicate_loop_to_edge_cfg (loop, e)))
{
loop_loc = find_loop_location (loop);
if (dump_file && (dump_flags & TDF_DETAILS))
*/
bb_before_first_loop = split_edge (loop_preheader_edge (first_loop));
- add_bb_to_loop (bb_before_first_loop, first_loop->outer);
- bb_before_second_loop = split_edge (first_loop->single_exit);
- add_bb_to_loop (bb_before_second_loop, first_loop->outer);
+ bb_before_second_loop = split_edge (single_exit (first_loop));
pre_condition =
- fold_build2 (LE_EXPR, boolean_type_node, first_niters, integer_zero_node);
+ fold_build2 (LE_EXPR, boolean_type_node, first_niters,
+ build_int_cst (TREE_TYPE (first_niters), th));
+
skip_e = slpeel_add_loop_guard (bb_before_first_loop, pre_condition,
bb_before_second_loop, bb_before_first_loop);
slpeel_update_phi_nodes_for_guard1 (skip_e, first_loop,
*/
bb_between_loops = new_exit_bb;
- bb_after_second_loop = split_edge (second_loop->single_exit);
- add_bb_to_loop (bb_after_second_loop, second_loop->outer);
+ bb_after_second_loop = split_edge (single_exit (second_loop));
pre_condition =
fold_build2 (EQ_EXPR, boolean_type_node, first_niters, niters);
node = get_loop_exit_condition (loop);
- if (node && EXPR_P (node) && EXPR_HAS_LOCATION (node)
+ if (node && CAN_HAVE_LOCATION_P (node) && EXPR_HAS_LOCATION (node)
&& EXPR_FILENAME (node) && EXPR_LINENO (node))
return EXPR_LOC (node);
for (si = bsi_start (bb); !bsi_end_p (si); bsi_next (&si))
{
node = bsi_stmt (si);
- if (node && EXPR_P (node) && EXPR_HAS_LOCATION (node))
+ if (node && CAN_HAVE_LOCATION_P (node) && EXPR_HAS_LOCATION (node))
return EXPR_LOC (node);
}
if (vl > vect_verbosity_level)
return false;
+ if (!current_function_decl || !vect_dump)
+ return false;
+
if (vect_loop_location == UNKNOWN_LOC)
fprintf (vect_dump, "\n%s:%d: note: ",
- DECL_SOURCE_FILE (current_function_decl),
- DECL_SOURCE_LINE (current_function_decl));
+ DECL_SOURCE_FILE (current_function_decl),
+ DECL_SOURCE_LINE (current_function_decl));
else
fprintf (vect_dump, "\n%s:%d: note: ",
LOC_FILE (vect_loop_location), LOC_LINE (vect_loop_location));
-
return true;
}
STMT_VINFO_TYPE (res) = undef_vec_info_type;
STMT_VINFO_STMT (res) = stmt;
STMT_VINFO_LOOP_VINFO (res) = loop_vinfo;
- STMT_VINFO_RELEVANT_P (res) = 0;
- STMT_VINFO_LIVE_P (res) = 0;
+ STMT_VINFO_RELEVANT (res) = 0;
+ STMT_VINFO_LIVE_P (res) = false;
STMT_VINFO_VECTYPE (res) = NULL;
STMT_VINFO_VEC_STMT (res) = NULL;
+ STMT_VINFO_IN_PATTERN_P (res) = false;
+ STMT_VINFO_RELATED_STMT (res) = NULL;
STMT_VINFO_DATA_REF (res) = NULL;
if (TREE_CODE (stmt) == PHI_NODE)
STMT_VINFO_DEF_TYPE (res) = vect_unknown_def_type;
else
STMT_VINFO_DEF_TYPE (res) = vect_loop_def;
- STMT_VINFO_MEMTAG (res) = NULL;
- STMT_VINFO_PTR_INFO (res) = NULL;
- STMT_VINFO_SUBVARS (res) = NULL;
- STMT_VINFO_VECT_DR_BASE_ADDRESS (res) = NULL;
- STMT_VINFO_VECT_INIT_OFFSET (res) = NULL_TREE;
- STMT_VINFO_VECT_STEP (res) = NULL_TREE;
- STMT_VINFO_VECT_BASE_ALIGNED_P (res) = false;
- STMT_VINFO_VECT_MISALIGNMENT (res) = NULL_TREE;
STMT_VINFO_SAME_ALIGN_REFS (res) = VEC_alloc (dr_p, heap, 5);
+ STMT_VINFO_INSIDE_OF_LOOP_COST (res) = 0;
+ STMT_VINFO_OUTSIDE_OF_LOOP_COST (res) = 0;
+ DR_GROUP_FIRST_DR (res) = NULL_TREE;
+ DR_GROUP_NEXT_DR (res) = NULL_TREE;
+ DR_GROUP_SIZE (res) = 0;
+ DR_GROUP_STORE_COUNT (res) = 0;
+ DR_GROUP_GAP (res) = 0;
+ DR_GROUP_SAME_DR_STMT (res) = NULL_TREE;
+ DR_GROUP_READ_WRITE_DEPENDENCE (res) = false;
return res;
}
for (phi = phi_nodes (bb); phi; phi = PHI_CHAIN (phi))
{
- tree_ann_t ann = get_tree_ann (phi);
+ stmt_ann_t ann = get_stmt_ann (phi);
set_stmt_info (ann, new_stmt_vec_info (phi, res));
}
stmt_ann_t ann;
ann = stmt_ann (stmt);
- set_stmt_info ((tree_ann_t)ann, new_stmt_vec_info (stmt, res));
+ set_stmt_info (ann, new_stmt_vec_info (stmt, res));
}
}
LOOP_VINFO_BBS (res) = bbs;
LOOP_VINFO_EXIT_COND (res) = NULL;
LOOP_VINFO_NITERS (res) = NULL;
+ LOOP_VINFO_COST_MODEL_MIN_ITERS (res) = 0;
LOOP_VINFO_VECTORIZABLE_P (res) = 0;
LOOP_PEELING_FOR_ALIGNMENT (res) = 0;
LOOP_VINFO_VECT_FACTOR (res) = 0;
- VARRAY_GENERIC_PTR_INIT (LOOP_VINFO_DATAREF_WRITES (res), 20,
- "loop_write_datarefs");
- VARRAY_GENERIC_PTR_INIT (LOOP_VINFO_DATAREF_READS (res), 20,
- "loop_read_datarefs");
+ LOOP_VINFO_DATAREFS (res) = VEC_alloc (data_reference_p, heap, 10);
+ LOOP_VINFO_DDRS (res) = VEC_alloc (ddr_p, heap, 10 * 10);
LOOP_VINFO_UNALIGNED_DR (res) = NULL;
+ LOOP_VINFO_MAY_MISALIGN_STMTS (res)
+ = VEC_alloc (tree, heap, PARAM_VALUE (PARAM_VECT_MAX_VERSION_CHECKS));
return res;
}
for (phi = phi_nodes (bb); phi; phi = PHI_CHAIN (phi))
{
- tree_ann_t ann = get_tree_ann (phi);
+ stmt_ann_t ann = stmt_ann (phi);
stmt_info = vinfo_for_stmt (phi);
free (stmt_info);
set_stmt_info (ann, NULL);
}
- for (si = bsi_start (bb); !bsi_end_p (si); bsi_next (&si))
+ for (si = bsi_start (bb); !bsi_end_p (si); )
{
tree stmt = bsi_stmt (si);
stmt_ann_t ann = stmt_ann (stmt);
if (stmt_info)
{
+ /* Check if this is a "pattern stmt" (introduced by the
+ vectorizer during the pattern recognition pass). */
+ bool remove_stmt_p = false;
+ tree orig_stmt = STMT_VINFO_RELATED_STMT (stmt_info);
+ if (orig_stmt)
+ {
+ stmt_vec_info orig_stmt_info = vinfo_for_stmt (orig_stmt);
+ if (orig_stmt_info
+ && STMT_VINFO_IN_PATTERN_P (orig_stmt_info))
+ remove_stmt_p = true;
+ }
+
+ /* Free stmt_vec_info. */
VEC_free (dr_p, heap, STMT_VINFO_SAME_ALIGN_REFS (stmt_info));
free (stmt_info);
- set_stmt_info ((tree_ann_t)ann, NULL);
+ set_stmt_info (ann, NULL);
+
+ /* Remove dead "pattern stmts". */
+ if (remove_stmt_p)
+ bsi_remove (&si, true);
}
+ bsi_next (&si);
}
}
free (LOOP_VINFO_BBS (loop_vinfo));
- varray_clear (LOOP_VINFO_DATAREF_WRITES (loop_vinfo));
- varray_clear (LOOP_VINFO_DATAREF_READS (loop_vinfo));
+ free_data_refs (LOOP_VINFO_DATAREFS (loop_vinfo));
+ free_dependence_relations (LOOP_VINFO_DDRS (loop_vinfo));
+ VEC_free (tree, heap, LOOP_VINFO_MAY_MISALIGN_STMTS (loop_vinfo));
free (loop_vinfo);
-}
-
-
-/* Function vect_strip_conversions
-
- Strip conversions that don't narrow the mode. */
-
-tree
-vect_strip_conversion (tree expr)
-{
- tree to, ti, oprnd0;
-
- while (TREE_CODE (expr) == NOP_EXPR || TREE_CODE (expr) == CONVERT_EXPR)
- {
- to = TREE_TYPE (expr);
- oprnd0 = TREE_OPERAND (expr, 0);
- ti = TREE_TYPE (oprnd0);
-
- if (!INTEGRAL_TYPE_P (to) || !INTEGRAL_TYPE_P (ti))
- return NULL_TREE;
- if (GET_MODE_SIZE (TYPE_MODE (to)) < GET_MODE_SIZE (TYPE_MODE (ti)))
- return NULL_TREE;
-
- expr = oprnd0;
- }
- return expr;
+ loop->aux = NULL;
}
*dt = vect_constant_def;
return true;
}
+ if (is_gimple_min_invariant (operand))
+ {
+ *def = operand;
+ *dt = vect_invariant_def;
+ return true;
+ }
if (TREE_CODE (operand) != SSA_NAME)
{
}
/* empty stmt is expected only in case of a function argument.
- (Otherwise - we expect a phi_node or a modify_expr). */
+ (Otherwise - we expect a phi_node or a GIMPLE_MODIFY_STMT). */
if (IS_EMPTY_STMT (*def_stmt))
{
tree arg = TREE_OPERAND (*def_stmt, 0);
- if (TREE_CODE (arg) == INTEGER_CST || TREE_CODE (arg) == REAL_CST)
+ if (is_gimple_min_invariant (arg))
{
*def = operand;
*dt = vect_invariant_def;
return false;
}
- /* stmts inside the loop that have been identified as performing
- a reduction operation cannot have uses in the loop. */
- if (*dt == vect_reduction_def && TREE_CODE (*def_stmt) != PHI_NODE)
- {
- if (vect_print_dump_info (REPORT_DETAILS))
- fprintf (vect_dump, "reduction used in loop.");
- return false;
- }
-
if (vect_print_dump_info (REPORT_DETAILS))
fprintf (vect_dump, "type of def: %d.",*dt);
case PHI_NODE:
*def = PHI_RESULT (*def_stmt);
gcc_assert (*dt == vect_induction_def || *dt == vect_reduction_def
- || *dt == vect_invariant_def);
+ || *dt == vect_invariant_def);
break;
- case MODIFY_EXPR:
- *def = TREE_OPERAND (*def_stmt, 0);
- gcc_assert (*dt == vect_loop_def || *dt == vect_invariant_def);
+ case GIMPLE_MODIFY_STMT:
+ *def = GIMPLE_STMT_OPERAND (*def_stmt, 0);
break;
default:
return false;
}
- if (*dt == vect_induction_def)
+ return true;
+}
+
+
+/* Function supportable_widening_operation
+
+ Check whether an operation represented by the code CODE is a
+ widening operation that is supported by the target platform in
+ vector form (i.e., when operating on arguments of type VECTYPE).
+
+ Widening operations we currently support are NOP (CONVERT), FLOAT
+ and WIDEN_MULT. This function checks if these operations are supported
+ by the target platform either directly (via vector tree-codes), or via
+ target builtins.
+
+ Output:
+ - CODE1 and CODE2 are codes of vector operations to be used when
+ vectorizing the operation, if available.
+ - DECL1 and DECL2 are decls of target builtin functions to be used
+ when vectorizing the operation, if available. In this case,
+ CODE1 and CODE2 are CALL_EXPR. */
+
+bool
+supportable_widening_operation (enum tree_code code, tree stmt, tree vectype,
+ tree *decl1, tree *decl2,
+ enum tree_code *code1, enum tree_code *code2)
+{
+ stmt_vec_info stmt_info = vinfo_for_stmt (stmt);
+ bool ordered_p;
+ enum machine_mode vec_mode;
+ enum insn_code icode1, icode2;
+ optab optab1, optab2;
+ tree expr = GIMPLE_STMT_OPERAND (stmt, 1);
+ tree type = TREE_TYPE (expr);
+ tree wide_vectype = get_vectype_for_scalar_type (type);
+ enum tree_code c1, c2;
+
+ /* The result of a vectorized widening operation usually requires two vectors
+ (because the widened results do not fit int one vector). The generated
+ vector results would normally be expected to be generated in the same
+ order as in the original scalar computation. i.e. if 8 results are
+ generated in each vector iteration, they are to be organized as follows:
+ vect1: [res1,res2,res3,res4], vect2: [res5,res6,res7,res8].
+
+ However, in the special case that the result of the widening operation is
+ used in a reduction computation only, the order doesn't matter (because
+ when vectorizing a reduction we change the order of the computation).
+ Some targets can take advantage of this and generate more efficient code.
+ For example, targets like Altivec, that support widen_mult using a sequence
+ of {mult_even,mult_odd} generate the following vectors:
+ vect1: [res1,res3,res5,res7], vect2: [res2,res4,res6,res8]. */
+
+ if (STMT_VINFO_RELEVANT (stmt_info) == vect_used_by_reduction)
+ ordered_p = false;
+ else
+ ordered_p = true;
+
+ if (!ordered_p
+ && code == WIDEN_MULT_EXPR
+ && targetm.vectorize.builtin_mul_widen_even
+ && targetm.vectorize.builtin_mul_widen_even (vectype)
+ && targetm.vectorize.builtin_mul_widen_odd
+ && targetm.vectorize.builtin_mul_widen_odd (vectype))
{
if (vect_print_dump_info (REPORT_DETAILS))
- fprintf (vect_dump, "induction not supported.");
+ fprintf (vect_dump, "Unordered widening operation detected.");
+
+ *code1 = *code2 = CALL_EXPR;
+ *decl1 = targetm.vectorize.builtin_mul_widen_even (vectype);
+ *decl2 = targetm.vectorize.builtin_mul_widen_odd (vectype);
+ return true;
+ }
+
+ switch (code)
+ {
+ case WIDEN_MULT_EXPR:
+ if (BYTES_BIG_ENDIAN)
+ {
+ c1 = VEC_WIDEN_MULT_HI_EXPR;
+ c2 = VEC_WIDEN_MULT_LO_EXPR;
+ }
+ else
+ {
+ c2 = VEC_WIDEN_MULT_HI_EXPR;
+ c1 = VEC_WIDEN_MULT_LO_EXPR;
+ }
+ break;
+
+ case NOP_EXPR:
+ case CONVERT_EXPR:
+ if (BYTES_BIG_ENDIAN)
+ {
+ c1 = VEC_UNPACK_HI_EXPR;
+ c2 = VEC_UNPACK_LO_EXPR;
+ }
+ else
+ {
+ c2 = VEC_UNPACK_HI_EXPR;
+ c1 = VEC_UNPACK_LO_EXPR;
+ }
+ break;
+
+ case FLOAT_EXPR:
+ if (BYTES_BIG_ENDIAN)
+ {
+ c1 = VEC_UNPACK_FLOAT_HI_EXPR;
+ c2 = VEC_UNPACK_FLOAT_LO_EXPR;
+ }
+ else
+ {
+ c2 = VEC_UNPACK_FLOAT_HI_EXPR;
+ c1 = VEC_UNPACK_FLOAT_LO_EXPR;
+ }
+ break;
+
+ case FIX_TRUNC_EXPR:
+ /* ??? Not yet implemented due to missing VEC_UNPACK_FIX_TRUNC_HI_EXPR/
+ VEC_UNPACK_FIX_TRUNC_LO_EXPR tree codes and optabs used for
+ computing the operation. */
return false;
+
+ default:
+ gcc_unreachable ();
}
+ if (code == FIX_TRUNC_EXPR)
+ {
+ /* The signedness is determined from output operand. */
+ optab1 = optab_for_tree_code (c1, type);
+ optab2 = optab_for_tree_code (c2, type);
+ }
+ else
+ {
+ optab1 = optab_for_tree_code (c1, vectype);
+ optab2 = optab_for_tree_code (c2, vectype);
+ }
+
+ if (!optab1 || !optab2)
+ return false;
+
+ vec_mode = TYPE_MODE (vectype);
+ if ((icode1 = optab1->handlers[(int) vec_mode].insn_code) == CODE_FOR_nothing
+ || insn_data[icode1].operand[0].mode != TYPE_MODE (wide_vectype)
+ || (icode2 = optab2->handlers[(int) vec_mode].insn_code)
+ == CODE_FOR_nothing
+ || insn_data[icode2].operand[0].mode != TYPE_MODE (wide_vectype))
+ return false;
+
+ *code1 = c1;
+ *code2 = c2;
+ return true;
+}
+
+
+/* Function supportable_narrowing_operation
+
+ Check whether an operation represented by the code CODE is a
+ narrowing operation that is supported by the target platform in
+ vector form (i.e., when operating on arguments of type VECTYPE).
+
+ Narrowing operations we currently support are NOP (CONVERT) and
+ FIX_TRUNC. This function checks if these operations are supported by
+ the target platform directly via vector tree-codes.
+
+ Output:
+ - CODE1 is the code of a vector operation to be used when
+ vectorizing the operation, if available. */
+
+bool
+supportable_narrowing_operation (enum tree_code code,
+ tree stmt, tree vectype,
+ enum tree_code *code1)
+{
+ enum machine_mode vec_mode;
+ enum insn_code icode1;
+ optab optab1;
+ tree expr = GIMPLE_STMT_OPERAND (stmt, 1);
+ tree type = TREE_TYPE (expr);
+ tree narrow_vectype = get_vectype_for_scalar_type (type);
+ enum tree_code c1;
+
+ switch (code)
+ {
+ case NOP_EXPR:
+ case CONVERT_EXPR:
+ c1 = VEC_PACK_TRUNC_EXPR;
+ break;
+
+ case FIX_TRUNC_EXPR:
+ c1 = VEC_PACK_FIX_TRUNC_EXPR;
+ break;
+
+ case FLOAT_EXPR:
+ /* ??? Not yet implemented due to missing VEC_PACK_FLOAT_EXPR
+ tree code and optabs used for computing the operation. */
+ return false;
+
+ default:
+ gcc_unreachable ();
+ }
+
+ if (code == FIX_TRUNC_EXPR)
+ /* The signedness is determined from output operand. */
+ optab1 = optab_for_tree_code (c1, type);
+ else
+ optab1 = optab_for_tree_code (c1, vectype);
+
+ if (!optab1)
+ return false;
+
+ vec_mode = TYPE_MODE (vectype);
+ if ((icode1 = optab1->handlers[(int) vec_mode].insn_code) == CODE_FOR_nothing
+ || insn_data[icode1].operand[0].mode != TYPE_MODE (narrow_vectype))
+ return false;
+
+ *code1 = c1;
return true;
}
such that:
1. operation is commutative and associative and it is safe to
- change the the order of the computation.
+ change the order of the computation.
2. no uses for a2 in the loop (a2 is used out of the loop)
3. no uses of a1 in the loop besides the reduction operation.
Conditions 2,3 are tested in vect_mark_stmts_to_be_vectorized. */
tree
-vect_is_simple_reduction (struct loop *loop ATTRIBUTE_UNUSED,
- tree phi ATTRIBUTE_UNUSED)
+vect_is_simple_reduction (struct loop *loop, tree phi)
{
edge latch_e = loop_latch_edge (loop);
tree loop_arg = PHI_ARG_DEF_FROM_EDGE (phi, latch_e);
int op_type;
tree operation, op1, op2;
tree type;
+ int nloop_uses;
+ tree name;
+ imm_use_iterator imm_iter;
+ use_operand_p use_p;
- if (TREE_CODE (loop_arg) != SSA_NAME)
+ name = PHI_RESULT (phi);
+ nloop_uses = 0;
+ FOR_EACH_IMM_USE_FAST (use_p, imm_iter, name)
{
- if (vect_print_dump_info (REPORT_DETAILS))
+ tree use_stmt = USE_STMT (use_p);
+ if (flow_bb_inside_loop_p (loop, bb_for_stmt (use_stmt))
+ && vinfo_for_stmt (use_stmt)
+ && !is_pattern_stmt_p (vinfo_for_stmt (use_stmt)))
+ nloop_uses++;
+ if (nloop_uses > 1)
{
- fprintf (vect_dump, "reduction: not ssa_name: ");
- print_generic_expr (vect_dump, loop_arg, TDF_SLIM);
+ if (vect_print_dump_info (REPORT_DETAILS))
+ fprintf (vect_dump, "reduction used in loop.");
+ return NULL_TREE;
}
+ }
+
+ if (TREE_CODE (loop_arg) != SSA_NAME)
+ {
+ if (vect_print_dump_info (REPORT_DETAILS))
+ {
+ fprintf (vect_dump, "reduction: not ssa_name: ");
+ print_generic_expr (vect_dump, loop_arg, TDF_SLIM);
+ }
return NULL_TREE;
}
if (!def_stmt)
{
if (vect_print_dump_info (REPORT_DETAILS))
- fprintf (vect_dump, "reduction: no def_stmt.");
+ fprintf (vect_dump, "reduction: no def_stmt.");
return NULL_TREE;
}
- if (TREE_CODE (def_stmt) != MODIFY_EXPR)
+ if (TREE_CODE (def_stmt) != GIMPLE_MODIFY_STMT)
{
if (vect_print_dump_info (REPORT_DETAILS))
- {
- print_generic_expr (vect_dump, def_stmt, TDF_SLIM);
- }
+ print_generic_expr (vect_dump, def_stmt, TDF_SLIM);
return NULL_TREE;
}
- operation = TREE_OPERAND (def_stmt, 1);
+ name = GIMPLE_STMT_OPERAND (def_stmt, 0);
+ nloop_uses = 0;
+ FOR_EACH_IMM_USE_FAST (use_p, imm_iter, name)
+ {
+ tree use_stmt = USE_STMT (use_p);
+ if (flow_bb_inside_loop_p (loop, bb_for_stmt (use_stmt))
+ && vinfo_for_stmt (use_stmt)
+ && !is_pattern_stmt_p (vinfo_for_stmt (use_stmt)))
+ nloop_uses++;
+ if (nloop_uses > 1)
+ {
+ if (vect_print_dump_info (REPORT_DETAILS))
+ fprintf (vect_dump, "reduction used in loop.");
+ return NULL_TREE;
+ }
+ }
+
+ operation = GIMPLE_STMT_OPERAND (def_stmt, 1);
code = TREE_CODE (operation);
if (!commutative_tree_code (code) || !associative_tree_code (code))
{
return NULL_TREE;
}
- op_type = TREE_CODE_LENGTH (code);
+ op_type = TREE_OPERAND_LENGTH (operation);
if (op_type != binary_op)
{
if (vect_print_dump_info (REPORT_DETAILS))
/* CHECKME: check for !flag_finite_math_only too? */
if (SCALAR_FLOAT_TYPE_P (type) && !flag_unsafe_math_optimizations)
{
- /* Changing the order of operations changes the sematics. */
+ /* Changing the order of operations changes the semantics. */
if (vect_print_dump_info (REPORT_DETAILS))
{
fprintf (vect_dump, "reduction: unsafe fp math optimization: ");
}
return NULL_TREE;
}
- else if (INTEGRAL_TYPE_P (type) && !TYPE_UNSIGNED (type) && flag_trapv)
+ else if (INTEGRAL_TYPE_P (type) && TYPE_OVERFLOW_TRAPS (type))
{
- /* Changing the order of operations changes the sematics. */
+ /* Changing the order of operations changes the semantics. */
if (vect_print_dump_info (REPORT_DETAILS))
{
fprintf (vect_dump, "reduction: unsafe int math optimization: ");
*/
def1 = SSA_NAME_DEF_STMT (op1);
def2 = SSA_NAME_DEF_STMT (op2);
- if (!def1 || !def2)
+ if (!def1 || !def2 || IS_EMPTY_STMT (def1) || IS_EMPTY_STMT (def2))
{
if (vect_print_dump_info (REPORT_DETAILS))
{
return NULL_TREE;
}
- if (TREE_CODE (def1) == MODIFY_EXPR
+
+ /* Check that one def is the reduction def, defined by PHI,
+ the other def is either defined in the loop by a GIMPLE_MODIFY_STMT,
+ or it's an induction (defined by some phi node). */
+
+ if (def2 == phi
&& flow_bb_inside_loop_p (loop, bb_for_stmt (def1))
- && def2 == phi)
+ && (TREE_CODE (def1) == GIMPLE_MODIFY_STMT
+ || STMT_VINFO_DEF_TYPE (vinfo_for_stmt (def1)) == vect_induction_def))
{
if (vect_print_dump_info (REPORT_DETAILS))
{
}
return def_stmt;
}
- else if (TREE_CODE (def2) == MODIFY_EXPR
- && flow_bb_inside_loop_p (loop, bb_for_stmt (def2))
- && def1 == phi)
+ else if (def1 == phi
+ && flow_bb_inside_loop_p (loop, bb_for_stmt (def2))
+ && (TREE_CODE (def2) == GIMPLE_MODIFY_STMT
+ || STMT_VINFO_DEF_TYPE (vinfo_for_stmt (def2)) == vect_induction_def))
{
- use_operand_p use;
- ssa_op_iter iter;
-
/* Swap operands (just for simplicity - so that the rest of the code
can assume that the reduction variable is always the last (second)
argument). */
fprintf (vect_dump, "detected reduction: need to swap operands:");
print_generic_expr (vect_dump, operation, TDF_SLIM);
}
-
- /* CHECKME */
- FOR_EACH_SSA_USE_OPERAND (use, def_stmt, iter, SSA_OP_USE)
- {
- tree tuse = USE_FROM_PTR (use);
- if (tuse == op1)
- SET_USE (use, op2);
- else if (tuse == op2)
- SET_USE (use, op1);
- }
+ swap_tree_operands (def_stmt, &TREE_OPERAND (operation, 0),
+ &TREE_OPERAND (operation, 1));
return def_stmt;
}
else
{
tree init_expr;
tree step_expr;
-
tree evolution_part = evolution_part_in_loop_num (access_fn, loop_nb);
/* When there is no evolution in this loop, the evolution function
return false;
step_expr = evolution_part;
- init_expr = unshare_expr (initial_condition_in_loop_num (access_fn,
- loop_nb));
+ init_expr = unshare_expr (initial_condition_in_loop_num (access_fn, loop_nb));
if (vect_print_dump_info (REPORT_DETAILS))
{
*step = step_expr;
if (TREE_CODE (step_expr) != INTEGER_CST)
- {
+ {
if (vect_print_dump_info (REPORT_DETAILS))
fprintf (vect_dump, "step unknown.");
return false;
Entry Point to loop vectorization phase. */
-void
-vectorize_loops (struct loops *loops)
+unsigned
+vectorize_loops (void)
{
unsigned int i;
unsigned int num_vectorized_loops = 0;
+ unsigned int vect_loops_num;
+ loop_iterator li;
+ struct loop *loop;
+
+ vect_loops_num = number_of_loops ();
+
+ /* Bail out if there are no loops. */
+ if (vect_loops_num <= 1)
+ return 0;
/* Fix the verbosity level if not defined explicitly by the user. */
vect_set_dump_settings ();
+ /* Allocate the bitmap that records which virtual variables that
+ need to be renamed. */
+ vect_memsyms_to_rename = BITMAP_ALLOC (NULL);
+
/* ----------- Analyze loops. ----------- */
/* If some loop was duplicated, it gets bigger number
than all previously defined loops. This fact allows us to run
only over initial loops skipping newly generated ones. */
- vect_loops_num = loops->num;
- for (i = 1; i < vect_loops_num; i++)
+ FOR_EACH_LOOP (li, loop, 0)
{
loop_vec_info loop_vinfo;
- struct loop *loop = loops->parray[i];
-
- if (!loop)
- continue;
vect_loop_location = find_loop_location (loop);
loop_vinfo = vect_analyze_loop (loop);
if (!loop_vinfo || !LOOP_VINFO_VECTORIZABLE_P (loop_vinfo))
continue;
- vect_transform_loop (loop_vinfo, loops);
+ vect_transform_loop (loop_vinfo);
num_vectorized_loops++;
}
+ vect_loop_location = UNKNOWN_LOC;
- if (vect_print_dump_info (REPORT_VECTORIZED_LOOPS))
+ if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS)
+ || (vect_print_dump_info (REPORT_VECTORIZED_LOOPS)
+ && num_vectorized_loops > 0))
fprintf (vect_dump, "vectorized %u loops in function.\n",
num_vectorized_loops);
/* ----------- Finalize. ----------- */
+ BITMAP_FREE (vect_memsyms_to_rename);
+
for (i = 1; i < vect_loops_num; i++)
{
- struct loop *loop = loops->parray[i];
loop_vec_info loop_vinfo;
+ loop = get_loop (i);
if (!loop)
continue;
loop_vinfo = loop->aux;
destroy_loop_vec_info (loop_vinfo);
loop->aux = NULL;
}
+
+ return num_vectorized_loops > 0 ? TODO_cleanup_cfg : 0;
+}
+
+/* Increase alignment of global arrays to improve vectorization potential.
+ TODO:
+ - Consider also structs that have an array field.
+ - Use ipa analysis to prune arrays that can't be vectorized?
+ This should involve global alignment analysis and in the future also
+ array padding. */
+
+static unsigned int
+increase_alignment (void)
+{
+ struct varpool_node *vnode;
+
+ /* Increase the alignment of all global arrays for vectorization. */
+ for (vnode = varpool_nodes_queue;
+ vnode;
+ vnode = vnode->next_needed)
+ {
+ tree vectype, decl = vnode->decl;
+ unsigned int alignment;
+
+ if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE)
+ continue;
+ vectype = get_vectype_for_scalar_type (TREE_TYPE (TREE_TYPE (decl)));
+ if (!vectype)
+ continue;
+ alignment = TYPE_ALIGN (vectype);
+ if (DECL_ALIGN (decl) >= alignment)
+ continue;
+
+ if (vect_can_force_dr_alignment_p (decl, alignment))
+ {
+ DECL_ALIGN (decl) = TYPE_ALIGN (vectype);
+ DECL_USER_ALIGN (decl) = 1;
+ if (dump_file)
+ {
+ fprintf (dump_file, "Increasing alignment of decl: ");
+ print_generic_expr (dump_file, decl, TDF_SLIM);
+ }
+ }
+ }
+ return 0;
}
+
+static bool
+gate_increase_alignment (void)
+{
+ return flag_section_anchors && flag_tree_vectorize;
+}
+
+struct tree_opt_pass pass_ipa_increase_alignment =
+{
+ "increase_alignment", /* name */
+ gate_increase_alignment, /* gate */
+ increase_alignment, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ 0, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+ 0 /* letter */
+};
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