#include "diagnostic-core.h"
/* Pattern recognition functions */
-static gimple vect_recog_widen_sum_pattern (gimple *, tree *, tree *);
-static gimple vect_recog_widen_mult_pattern (gimple *, tree *, tree *);
-static gimple vect_recog_dot_prod_pattern (gimple *, tree *, tree *);
-static gimple vect_recog_pow_pattern (gimple *, tree *, tree *);
+static gimple vect_recog_widen_sum_pattern (VEC (gimple, heap) **, tree *,
+ tree *);
+static gimple vect_recog_widen_mult_pattern (VEC (gimple, heap) **, tree *,
+ tree *);
+static gimple vect_recog_dot_prod_pattern (VEC (gimple, heap) **, tree *,
+ tree *);
+static gimple vect_recog_pow_pattern (VEC (gimple, heap) **, tree *, tree *);
static vect_recog_func_ptr vect_vect_recog_func_ptrs[NUM_PATTERNS] = {
vect_recog_widen_mult_pattern,
vect_recog_widen_sum_pattern,
Input:
- * LAST_STMT: A stmt from which the pattern search begins. In the example,
- when this function is called with S7, the pattern {S3,S4,S5,S6,S7} will be
- detected.
+ * STMTS: Contains a stmt from which the pattern search begins. In the
+ example, when this function is called with S7, the pattern {S3,S4,S5,S6,S7}
+ will be detected.
Output:
inner-loop nested in an outer-loop that us being vectorized). */
static gimple
-vect_recog_dot_prod_pattern (gimple *last_stmt, tree *type_in, tree *type_out)
+vect_recog_dot_prod_pattern (VEC (gimple, heap) **stmts, tree *type_in,
+ tree *type_out)
{
- gimple stmt;
+ gimple stmt, last_stmt = VEC_index (gimple, *stmts, 0);
tree oprnd0, oprnd1;
tree oprnd00, oprnd01;
- stmt_vec_info stmt_vinfo = vinfo_for_stmt (*last_stmt);
+ stmt_vec_info stmt_vinfo = vinfo_for_stmt (last_stmt);
tree type, half_type;
gimple pattern_stmt;
tree prod_type;
struct loop *loop = LOOP_VINFO_LOOP (loop_info);
tree var;
- if (!is_gimple_assign (*last_stmt))
+ if (!is_gimple_assign (last_stmt))
return NULL;
- type = gimple_expr_type (*last_stmt);
+ type = gimple_expr_type (last_stmt);
/* Look for the following pattern
DX = (TYPE1) X;
/* Starting from LAST_STMT, follow the defs of its uses in search
of the above pattern. */
- if (gimple_assign_rhs_code (*last_stmt) != PLUS_EXPR)
+ if (gimple_assign_rhs_code (last_stmt) != PLUS_EXPR)
return NULL;
if (STMT_VINFO_IN_PATTERN_P (stmt_vinfo))
if (STMT_VINFO_DEF_TYPE (stmt_vinfo) != vect_reduction_def)
return NULL;
- oprnd0 = gimple_assign_rhs1 (*last_stmt);
- oprnd1 = gimple_assign_rhs2 (*last_stmt);
+ oprnd0 = gimple_assign_rhs1 (last_stmt);
+ oprnd1 = gimple_assign_rhs2 (last_stmt);
if (!types_compatible_p (TREE_TYPE (oprnd0), type)
|| !types_compatible_p (TREE_TYPE (oprnd1), type))
return NULL;
- stmt = *last_stmt;
+ stmt = last_stmt;
if (widened_name_p (oprnd0, stmt, &half_type, &def_stmt, true))
{
half_type = type;
}
- /* So far so good. Since *last_stmt was detected as a (summation) reduction,
+ /* So far so good. Since last_stmt was detected as a (summation) reduction,
we know that oprnd1 is the reduction variable (defined by a loop-header
phi), and oprnd0 is an ssa-name defined by a stmt in the loop body.
Left to check that oprnd0 is defined by a (widen_)mult_expr */
/* We don't allow changing the order of the computation in the inner-loop
when doing outer-loop vectorization. */
- gcc_assert (!nested_in_vect_loop_p (loop, *last_stmt));
+ gcc_assert (!nested_in_vect_loop_p (loop, last_stmt));
return pattern_stmt;
}
+
+/* Handle two cases of multiplication by a constant. The first one is when
+ the constant, CONST_OPRND, fits the type (HALF_TYPE) of the second
+ operand (OPRND). In that case, we can peform widen-mult from HALF_TYPE to
+ TYPE.
+
+ Otherwise, if the type of the result (TYPE) is at least 4 times bigger than
+ HALF_TYPE, and CONST_OPRND fits an intermediate type (2 times smaller than
+ TYPE), we can perform widen-mult from the intermediate type to TYPE and
+ replace a_T = (TYPE) a_t; with a_it - (interm_type) a_t; */
+
+static bool
+vect_handle_widen_mult_by_const (tree const_oprnd, tree *oprnd,
+ VEC (gimple, heap) **stmts, tree type,
+ tree *half_type, gimple def_stmt)
+{
+ tree new_type, new_oprnd, tmp;
+ gimple new_stmt;
+
+ if (int_fits_type_p (const_oprnd, *half_type))
+ {
+ /* CONST_OPRND is a constant of HALF_TYPE. */
+ *oprnd = gimple_assign_rhs1 (def_stmt);
+ return true;
+ }
+
+ if (TYPE_PRECISION (type) < (TYPE_PRECISION (*half_type) * 4)
+ || !vinfo_for_stmt (def_stmt))
+ return false;
+
+ /* TYPE is 4 times bigger than HALF_TYPE, try widen-mult for
+ a type 2 times bigger than HALF_TYPE. */
+ new_type = build_nonstandard_integer_type (TYPE_PRECISION (type) / 2,
+ TYPE_UNSIGNED (type));
+ if (!int_fits_type_p (const_oprnd, new_type))
+ return false;
+
+ /* Use NEW_TYPE for widen_mult. */
+ if (STMT_VINFO_RELATED_STMT (vinfo_for_stmt (def_stmt)))
+ {
+ new_stmt = STMT_VINFO_RELATED_STMT (vinfo_for_stmt (def_stmt));
+ /* Check if the already created pattern stmt is what we need. */
+ if (!is_gimple_assign (new_stmt)
+ || gimple_assign_rhs_code (new_stmt) != NOP_EXPR
+ || TREE_TYPE (gimple_assign_lhs (new_stmt)) != new_type)
+ return false;
+
+ *oprnd = gimple_assign_lhs (new_stmt);
+ }
+ else
+ {
+ /* Create a_T = (NEW_TYPE) a_t; */
+ *oprnd = gimple_assign_rhs1 (def_stmt);
+ tmp = create_tmp_var (new_type, NULL);
+ add_referenced_var (tmp);
+ new_oprnd = make_ssa_name (tmp, NULL);
+ new_stmt = gimple_build_assign_with_ops (NOP_EXPR, new_oprnd, *oprnd,
+ NULL_TREE);
+ SSA_NAME_DEF_STMT (new_oprnd) = new_stmt;
+ STMT_VINFO_RELATED_STMT (vinfo_for_stmt (def_stmt)) = new_stmt;
+ VEC_safe_push (gimple, heap, *stmts, def_stmt);
+ *oprnd = new_oprnd;
+ }
+
+ *half_type = new_type;
+ return true;
+}
+
+
/* Function vect_recog_widen_mult_pattern
Try to find the following pattern:
S3 a_T = (TYPE) a_t;
S5 prod_T = a_T * CONST;
- Input:
+ A special case of multiplication by constants is when 'TYPE' is 4 times
+ bigger than 'type', but CONST fits an intermediate type 2 times smaller
+ than 'TYPE'. In that case we create an additional pattern stmt for S3
+ to create a variable of the intermediate type, and perform widen-mult
+ on the intermediate type as well:
+
+ type a_t;
+ interm_type a_it;
+ TYPE a_T, prod_T, prod_T';
+
+ S1 a_t = ;
+ S3 a_T = (TYPE) a_t;
+ '--> a_it = (interm_type) a_t;
+ S5 prod_T = a_T * CONST;
+ '--> prod_T' = a_it w* CONST;
- * LAST_STMT: A stmt from which the pattern search begins. In the example,
- when this function is called with S5, the pattern {S3,S4,S5,(S6)} is
- detected.
+ Input/Output:
+
+ * STMTS: Contains a stmt from which the pattern search begins. In the
+ example, when this function is called with S5, the pattern {S3,S4,S5,(S6)}
+ is detected. In case of unsigned widen-mult, the original stmt (S5) is
+ replaced with S6 in STMTS. In case of multiplication by a constant
+ of an intermediate type (the last case above), STMTS also contains S3
+ (inserted before S5).
Output:
*/
static gimple
-vect_recog_widen_mult_pattern (gimple *last_stmt,
- tree *type_in,
- tree *type_out)
+vect_recog_widen_mult_pattern (VEC (gimple, heap) **stmts,
+ tree *type_in, tree *type_out)
{
+ gimple last_stmt = VEC_pop (gimple, *stmts);
gimple def_stmt0, def_stmt1;
tree oprnd0, oprnd1;
tree type, half_type0, half_type1;
VEC (tree, heap) *dummy_vec;
bool op0_ok, op1_ok;
- if (!is_gimple_assign (*last_stmt))
+ if (!is_gimple_assign (last_stmt))
return NULL;
- type = gimple_expr_type (*last_stmt);
+ type = gimple_expr_type (last_stmt);
/* Starting from LAST_STMT, follow the defs of its uses in search
of the above pattern. */
- if (gimple_assign_rhs_code (*last_stmt) != MULT_EXPR)
+ if (gimple_assign_rhs_code (last_stmt) != MULT_EXPR)
return NULL;
- oprnd0 = gimple_assign_rhs1 (*last_stmt);
- oprnd1 = gimple_assign_rhs2 (*last_stmt);
+ oprnd0 = gimple_assign_rhs1 (last_stmt);
+ oprnd1 = gimple_assign_rhs2 (last_stmt);
if (!types_compatible_p (TREE_TYPE (oprnd0), type)
|| !types_compatible_p (TREE_TYPE (oprnd1), type))
return NULL;
/* Check argument 0. */
- op0_ok = widened_name_p (oprnd0, *last_stmt, &half_type0, &def_stmt0, false);
+ op0_ok = widened_name_p (oprnd0, last_stmt, &half_type0, &def_stmt0, false);
/* Check argument 1. */
- op1_ok = widened_name_p (oprnd1, *last_stmt, &half_type1, &def_stmt1, false);
+ op1_ok = widened_name_p (oprnd1, last_stmt, &half_type1, &def_stmt1, false);
/* In case of multiplication by a constant one of the operands may not match
the pattern, but not both. */
}
else if (!op0_ok)
{
- if (CONSTANT_CLASS_P (oprnd0)
+ if (TREE_CODE (oprnd0) == INTEGER_CST
&& TREE_CODE (half_type1) == INTEGER_TYPE
- && tree_int_cst_lt (oprnd0, TYPE_MAXVAL (half_type1))
- && tree_int_cst_lt (TYPE_MINVAL (half_type1), oprnd0))
- {
- /* OPRND0 is a constant of HALF_TYPE1. */
- half_type0 = half_type1;
- oprnd1 = gimple_assign_rhs1 (def_stmt1);
- }
+ && vect_handle_widen_mult_by_const (oprnd0, &oprnd1, stmts, type,
+ &half_type1, def_stmt1))
+ half_type0 = half_type1;
else
return NULL;
}
else if (!op1_ok)
{
- if (CONSTANT_CLASS_P (oprnd1)
+ if (TREE_CODE (oprnd1) == INTEGER_CST
&& TREE_CODE (half_type0) == INTEGER_TYPE
- && tree_int_cst_lt (oprnd1, TYPE_MAXVAL (half_type0))
- && tree_int_cst_lt (TYPE_MINVAL (half_type0), oprnd1))
- {
- /* OPRND1 is a constant of HALF_TYPE0. */
- half_type1 = half_type0;
- oprnd0 = gimple_assign_rhs1 (def_stmt0);
- }
+ && vect_handle_widen_mult_by_const (oprnd1, &oprnd0, stmts, type,
+ &half_type0, def_stmt0))
+ half_type1 = half_type0;
else
return NULL;
}
Use unsigned TYPE as the type for WIDEN_MULT_EXPR. */
if (TYPE_UNSIGNED (type) != TYPE_UNSIGNED (half_type0))
{
- tree lhs = gimple_assign_lhs (*last_stmt), use_lhs;
+ tree lhs = gimple_assign_lhs (last_stmt), use_lhs;
imm_use_iterator imm_iter;
use_operand_p use_p;
int nuses = 0;
return NULL;
type = use_type;
- *last_stmt = use_stmt;
+ last_stmt = use_stmt;
}
if (!types_compatible_p (half_type0, half_type1))
vectype_out = get_vectype_for_scalar_type (type);
if (!vectype
|| !vectype_out
- || !supportable_widening_operation (WIDEN_MULT_EXPR, *last_stmt,
+ || !supportable_widening_operation (WIDEN_MULT_EXPR, last_stmt,
vectype_out, vectype,
&dummy, &dummy, &dummy_code,
&dummy_code, &dummy_int, &dummy_vec))
if (vect_print_dump_info (REPORT_DETAILS))
print_gimple_stmt (vect_dump, pattern_stmt, 0, TDF_SLIM);
+ VEC_safe_push (gimple, heap, *stmts, last_stmt);
return pattern_stmt;
}
*/
static gimple
-vect_recog_pow_pattern (gimple *last_stmt, tree *type_in, tree *type_out)
+vect_recog_pow_pattern (VEC (gimple, heap) **stmts, tree *type_in,
+ tree *type_out)
{
+ gimple last_stmt = VEC_index (gimple, *stmts, 0);
tree fn, base, exp = NULL;
gimple stmt;
tree var;
- if (!is_gimple_call (*last_stmt) || gimple_call_lhs (*last_stmt) == NULL)
+ if (!is_gimple_call (last_stmt) || gimple_call_lhs (last_stmt) == NULL)
return NULL;
- fn = gimple_call_fndecl (*last_stmt);
+ fn = gimple_call_fndecl (last_stmt);
if (fn == NULL_TREE || DECL_BUILT_IN_CLASS (fn) != BUILT_IN_NORMAL)
return NULL;
case BUILT_IN_POWI:
case BUILT_IN_POWF:
case BUILT_IN_POW:
- base = gimple_call_arg (*last_stmt, 0);
- exp = gimple_call_arg (*last_stmt, 1);
+ base = gimple_call_arg (last_stmt, 0);
+ exp = gimple_call_arg (last_stmt, 1);
if (TREE_CODE (exp) != REAL_CST
&& TREE_CODE (exp) != INTEGER_CST)
return NULL;
inner-loop nested in an outer-loop that us being vectorized). */
static gimple
-vect_recog_widen_sum_pattern (gimple *last_stmt, tree *type_in, tree *type_out)
+vect_recog_widen_sum_pattern (VEC (gimple, heap) **stmts, tree *type_in,
+ tree *type_out)
{
- gimple stmt;
+ gimple stmt, last_stmt = VEC_index (gimple, *stmts, 0);
tree oprnd0, oprnd1;
- stmt_vec_info stmt_vinfo = vinfo_for_stmt (*last_stmt);
+ stmt_vec_info stmt_vinfo = vinfo_for_stmt (last_stmt);
tree type, half_type;
gimple pattern_stmt;
loop_vec_info loop_info = STMT_VINFO_LOOP_VINFO (stmt_vinfo);
struct loop *loop = LOOP_VINFO_LOOP (loop_info);
tree var;
- if (!is_gimple_assign (*last_stmt))
+ if (!is_gimple_assign (last_stmt))
return NULL;
- type = gimple_expr_type (*last_stmt);
+ type = gimple_expr_type (last_stmt);
/* Look for the following pattern
DX = (TYPE) X;
/* Starting from LAST_STMT, follow the defs of its uses in search
of the above pattern. */
- if (gimple_assign_rhs_code (*last_stmt) != PLUS_EXPR)
+ if (gimple_assign_rhs_code (last_stmt) != PLUS_EXPR)
return NULL;
if (STMT_VINFO_DEF_TYPE (stmt_vinfo) != vect_reduction_def)
return NULL;
- oprnd0 = gimple_assign_rhs1 (*last_stmt);
- oprnd1 = gimple_assign_rhs2 (*last_stmt);
+ oprnd0 = gimple_assign_rhs1 (last_stmt);
+ oprnd1 = gimple_assign_rhs2 (last_stmt);
if (!types_compatible_p (TREE_TYPE (oprnd0), type)
|| !types_compatible_p (TREE_TYPE (oprnd1), type))
return NULL;
- /* So far so good. Since *last_stmt was detected as a (summation) reduction,
+ /* So far so good. Since last_stmt was detected as a (summation) reduction,
we know that oprnd1 is the reduction variable (defined by a loop-header
phi), and oprnd0 is an ssa-name defined by a stmt in the loop body.
Left to check that oprnd0 is defined by a cast from type 'type' to type
'TYPE'. */
- if (!widened_name_p (oprnd0, *last_stmt, &half_type, &stmt, true))
+ if (!widened_name_p (oprnd0, last_stmt, &half_type, &stmt, true))
return NULL;
oprnd0 = gimple_assign_rhs1 (stmt);
/* We don't allow changing the order of the computation in the inner-loop
when doing outer-loop vectorization. */
- gcc_assert (!nested_in_vect_loop_p (loop, *last_stmt));
+ gcc_assert (!nested_in_vect_loop_p (loop, last_stmt));
return pattern_stmt;
}
static void
vect_pattern_recog_1 (
- gimple (* vect_recog_func) (gimple *, tree *, tree *),
+ gimple (* vect_recog_func) (VEC (gimple, heap) **, tree *, tree *),
gimple_stmt_iterator si)
{
gimple stmt = gsi_stmt (si), pattern_stmt;
enum tree_code code;
int i;
gimple next;
+ VEC (gimple, heap) *stmts_to_replace = VEC_alloc (gimple, heap, 1);
- pattern_stmt = (* vect_recog_func) (&stmt, &type_in, &type_out);
+ VEC_quick_push (gimple, stmts_to_replace, stmt);
+ pattern_stmt = (* vect_recog_func) (&stmts_to_replace, &type_in, &type_out);
if (!pattern_stmt)
return;
- si = gsi_for_stmt (stmt);
+ stmt = VEC_last (gimple, stmts_to_replace);
stmt_info = vinfo_for_stmt (stmt);
loop_vinfo = STMT_VINFO_LOOP_VINFO (stmt_info);
FOR_EACH_VEC_ELT (gimple, LOOP_VINFO_REDUCTIONS (loop_vinfo), i, next)
if (next == stmt)
VEC_ordered_remove (gimple, LOOP_VINFO_REDUCTIONS (loop_vinfo), i);
+
+ /* In case of widen-mult by a constant, it is possible that an additional
+ pattern stmt is created and inserted in STMTS_TO_REPLACE. We create a
+ stmt_info for it, and mark the relevant statements. */
+ for (i = 0; VEC_iterate (gimple, stmts_to_replace, i, stmt)
+ && (unsigned) i < (VEC_length (gimple, stmts_to_replace) - 1);
+ i++)
+ {
+ stmt_info = vinfo_for_stmt (stmt);
+ pattern_stmt = STMT_VINFO_RELATED_STMT (stmt_info);
+ if (vect_print_dump_info (REPORT_DETAILS))
+ {
+ fprintf (vect_dump, "additional pattern stmt: ");
+ print_gimple_stmt (vect_dump, pattern_stmt, 0, TDF_SLIM);
+ }
+
+ set_vinfo_for_stmt (pattern_stmt,
+ new_stmt_vec_info (pattern_stmt, loop_vinfo, NULL));
+ gimple_set_bb (pattern_stmt, gimple_bb (stmt));
+ pattern_stmt_info = vinfo_for_stmt (pattern_stmt);
+
+ STMT_VINFO_RELATED_STMT (pattern_stmt_info) = stmt;
+ STMT_VINFO_DEF_TYPE (pattern_stmt_info)
+ = STMT_VINFO_DEF_TYPE (stmt_info);
+ STMT_VINFO_VECTYPE (pattern_stmt_info) = STMT_VINFO_VECTYPE (stmt_info);
+ STMT_VINFO_IN_PATTERN_P (stmt_info) = true;
+ }
+
+ VEC_free (gimple, heap, stmts_to_replace);
}
unsigned int nbbs = loop->num_nodes;
gimple_stmt_iterator si;
unsigned int i, j;
- gimple (* vect_recog_func_ptr) (gimple *, tree *, tree *);
+ gimple (* vect_recog_func_ptr) (VEC (gimple, heap) **, tree *, tree *);
if (vect_print_dump_info (REPORT_DETAILS))
fprintf (vect_dump, "=== vect_pattern_recog ===");
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