/* Data references and dependences detectors.
- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2015 Free Software Foundation, Inc.
Contributed by Sebastian Pop <pop@cri.ensmp.fr>
This file is part of GCC.
#include "config.h"
#include "system.h"
#include "coretypes.h"
+#include "alias.h"
+#include "symtab.h"
+#include "options.h"
+#include "tree.h"
+#include "fold-const.h"
+#include "tm.h"
+#include "hard-reg-set.h"
+#include "function.h"
+#include "rtl.h"
+#include "flags.h"
+#include "insn-config.h"
+#include "expmed.h"
+#include "dojump.h"
+#include "explow.h"
+#include "calls.h"
+#include "emit-rtl.h"
+#include "varasm.h"
+#include "stmt.h"
+#include "expr.h"
#include "gimple-pretty-print.h"
-#include "tree-flow.h"
+#include "predict.h"
+#include "dominance.h"
+#include "cfg.h"
+#include "basic-block.h"
+#include "tree-ssa-alias.h"
+#include "internal-fn.h"
+#include "gimple-expr.h"
+#include "gimple.h"
+#include "gimple-iterator.h"
+#include "tree-ssa-loop-niter.h"
+#include "tree-ssa-loop.h"
+#include "tree-ssa.h"
#include "cfgloop.h"
#include "tree-data-ref.h"
#include "tree-scalar-evolution.h"
-#include "tree-pass.h"
+#include "dumpfile.h"
#include "langhooks.h"
#include "tree-affine.h"
#include "params.h"
/* Dump into FILE all the data references from DATAREFS. */
static void
-dump_data_references (FILE *file, VEC (data_reference_p, heap) *datarefs)
+dump_data_references (FILE *file, vec<data_reference_p> datarefs)
{
unsigned int i;
struct data_reference *dr;
- FOR_EACH_VEC_ELT (data_reference_p, datarefs, i, dr)
+ FOR_EACH_VEC_ELT (datarefs, i, dr)
dump_data_reference (file, dr);
}
+/* Unified dump into FILE all the data references from DATAREFS. */
+
+DEBUG_FUNCTION void
+debug (vec<data_reference_p> &ref)
+{
+ dump_data_references (stderr, ref);
+}
+
+DEBUG_FUNCTION void
+debug (vec<data_reference_p> *ptr)
+{
+ if (ptr)
+ debug (*ptr);
+ else
+ fprintf (stderr, "<nil>\n");
+}
+
+
/* Dump into STDERR all the data references from DATAREFS. */
DEBUG_FUNCTION void
-debug_data_references (VEC (data_reference_p, heap) *datarefs)
+debug_data_references (vec<data_reference_p> datarefs)
{
dump_data_references (stderr, datarefs);
}
fprintf (outf, "#)\n");
}
+/* Unified dump function for a DATA_REFERENCE structure. */
+
+DEBUG_FUNCTION void
+debug (data_reference &ref)
+{
+ dump_data_reference (stderr, &ref);
+}
+
+DEBUG_FUNCTION void
+debug (data_reference *ptr)
+{
+ if (ptr)
+ debug (*ptr);
+ else
+ fprintf (stderr, "<nil>\n");
+}
+
+
/* Dumps the affine function described by FN to the file OUTF. */
static void
unsigned i;
tree coef;
- print_generic_expr (outf, VEC_index (tree, fn, 0), TDF_SLIM);
- for (i = 1; VEC_iterate (tree, fn, i, coef); i++)
+ print_generic_expr (outf, fn[0], TDF_SLIM);
+ for (i = 1; fn.iterate (i, &coef); i++)
{
fprintf (outf, " + ");
print_generic_expr (outf, coef, TDF_SLIM);
unsigned i;
if (cf->n == NO_DEPENDENCE)
- fprintf (outf, "no dependence\n");
+ fprintf (outf, "no dependence");
else if (cf->n == NOT_KNOWN)
- fprintf (outf, "not known\n");
+ fprintf (outf, "not known");
else
{
for (i = 0; i < cf->n; i++)
{
+ if (i != 0)
+ fprintf (outf, " ");
fprintf (outf, "[");
dump_affine_function (outf, cf->fns[i]);
- fprintf (outf, "]\n");
+ fprintf (outf, "]");
}
}
}
if (CF_NONTRIVIAL_P (cf))
{
tree last_iteration = SUB_LAST_CONFLICT (subscript);
- fprintf (outf, " last_conflict: ");
- print_generic_stmt (outf, last_iteration, 0);
+ fprintf (outf, "\n last_conflict: ");
+ print_generic_expr (outf, last_iteration, 0);
}
cf = SUB_CONFLICTS_IN_B (subscript);
- fprintf (outf, " iterations_that_access_an_element_twice_in_B: ");
+ fprintf (outf, "\n iterations_that_access_an_element_twice_in_B: ");
dump_conflict_function (outf, cf);
if (CF_NONTRIVIAL_P (cf))
{
tree last_iteration = SUB_LAST_CONFLICT (subscript);
- fprintf (outf, " last_conflict: ");
- print_generic_stmt (outf, last_iteration, 0);
+ fprintf (outf, "\n last_conflict: ");
+ print_generic_expr (outf, last_iteration, 0);
}
- fprintf (outf, " (Subscript distance: ");
- print_generic_stmt (outf, SUB_DISTANCE (subscript), 0);
- fprintf (outf, " )\n");
- fprintf (outf, " )\n");
+ fprintf (outf, "\n (Subscript distance: ");
+ print_generic_expr (outf, SUB_DISTANCE (subscript), 0);
+ fprintf (outf, " ))\n");
}
/* Print the classic direction vector DIRV to OUTF. */
/* Print a vector of direction vectors. */
static void
-print_dir_vectors (FILE *outf, VEC (lambda_vector, heap) *dir_vects,
+print_dir_vectors (FILE *outf, vec<lambda_vector> dir_vects,
int length)
{
unsigned j;
lambda_vector v;
- FOR_EACH_VEC_ELT (lambda_vector, dir_vects, j, v)
+ FOR_EACH_VEC_ELT (dir_vects, j, v)
print_direction_vector (outf, v, length);
}
/* Print a vector of distance vectors. */
static void
-print_dist_vectors (FILE *outf, VEC (lambda_vector, heap) *dist_vects,
+print_dist_vectors (FILE *outf, vec<lambda_vector> dist_vects,
int length)
{
unsigned j;
lambda_vector v;
- FOR_EACH_VEC_ELT (lambda_vector, dist_vects, j, v)
+ FOR_EACH_VEC_ELT (dist_vects, j, v)
print_lambda_vector (outf, v, length);
}
fprintf (outf, " inner loop index: %d\n", DDR_INNER_LOOP (ddr));
fprintf (outf, " loop nest: (");
- FOR_EACH_VEC_ELT (loop_p, DDR_LOOP_NEST (ddr), i, loopi)
+ FOR_EACH_VEC_ELT (DDR_LOOP_NEST (ddr), i, loopi)
fprintf (outf, "%d ", loopi->num);
fprintf (outf, ")\n");
void
dump_data_dependence_relations (FILE *file,
- VEC (ddr_p, heap) *ddrs)
+ vec<ddr_p> ddrs)
{
unsigned int i;
struct data_dependence_relation *ddr;
- FOR_EACH_VEC_ELT (ddr_p, ddrs, i, ddr)
+ FOR_EACH_VEC_ELT (ddrs, i, ddr)
dump_data_dependence_relation (file, ddr);
}
+DEBUG_FUNCTION void
+debug (vec<ddr_p> &ref)
+{
+ dump_data_dependence_relations (stderr, ref);
+}
+
+DEBUG_FUNCTION void
+debug (vec<ddr_p> *ptr)
+{
+ if (ptr)
+ debug (*ptr);
+ else
+ fprintf (stderr, "<nil>\n");
+}
+
+
/* Dump to STDERR all the dependence relations from DDRS. */
DEBUG_FUNCTION void
-debug_data_dependence_relations (VEC (ddr_p, heap) *ddrs)
+debug_data_dependence_relations (vec<ddr_p> ddrs)
{
dump_data_dependence_relations (stderr, ddrs);
}
considered nest. */
static void
-dump_dist_dir_vectors (FILE *file, VEC (ddr_p, heap) *ddrs)
+dump_dist_dir_vectors (FILE *file, vec<ddr_p> ddrs)
{
unsigned int i, j;
struct data_dependence_relation *ddr;
lambda_vector v;
- FOR_EACH_VEC_ELT (ddr_p, ddrs, i, ddr)
+ FOR_EACH_VEC_ELT (ddrs, i, ddr)
if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE && DDR_AFFINE_P (ddr))
{
- FOR_EACH_VEC_ELT (lambda_vector, DDR_DIST_VECTS (ddr), j, v)
+ FOR_EACH_VEC_ELT (DDR_DIST_VECTS (ddr), j, v)
{
fprintf (file, "DISTANCE_V (");
print_lambda_vector (file, v, DDR_NB_LOOPS (ddr));
fprintf (file, ")\n");
}
- FOR_EACH_VEC_ELT (lambda_vector, DDR_DIR_VECTS (ddr), j, v)
+ FOR_EACH_VEC_ELT (DDR_DIR_VECTS (ddr), j, v)
{
fprintf (file, "DIRECTION_V (");
print_direction_vector (file, v, DDR_NB_LOOPS (ddr));
/* Dumps the data dependence relations DDRS in FILE. */
static void
-dump_ddrs (FILE *file, VEC (ddr_p, heap) *ddrs)
+dump_ddrs (FILE *file, vec<ddr_p> ddrs)
{
unsigned int i;
struct data_dependence_relation *ddr;
- FOR_EACH_VEC_ELT (ddr_p, ddrs, i, ddr)
+ FOR_EACH_VEC_ELT (ddrs, i, ddr)
dump_data_dependence_relation (file, ddr);
fprintf (file, "\n\n");
}
DEBUG_FUNCTION void
-debug_ddrs (VEC (ddr_p, heap) *ddrs)
+debug_ddrs (vec<ddr_p> ddrs)
{
dump_ddrs (stderr, ddrs);
}
{
tree base, poffset;
HOST_WIDE_INT pbitsize, pbitpos;
- enum machine_mode pmode;
+ machine_mode pmode;
int punsignedp, pvolatilep;
op0 = TREE_OPERAND (op0, 0);
case SSA_NAME:
{
+ if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (op0))
+ return false;
+
gimple def_stmt = SSA_NAME_DEF_STMT (op0);
enum tree_code subcode;
tree ref = DR_REF (dr);
HOST_WIDE_INT pbitsize, pbitpos;
tree base, poffset;
- enum machine_mode pmode;
+ machine_mode pmode;
int punsignedp, pvolatilep;
affine_iv base_iv, offset_iv;
tree init, dinit, step;
{
if (!integer_zerop (TREE_OPERAND (base, 1)))
{
- double_int moff = mem_ref_offset (base);
- tree mofft = double_int_to_tree (sizetype, moff);
+ offset_int moff = mem_ref_offset (base);
+ tree mofft = wide_int_to_tree (sizetype, moff);
if (!poffset)
poffset = mofft;
else
static void
dr_analyze_indices (struct data_reference *dr, loop_p nest, loop_p loop)
{
- VEC (tree, heap) *access_fns = NULL;
+ vec<tree> access_fns = vNULL;
tree ref, op;
tree base, off, access_fn;
basic_block before_loop;
if (!nest)
{
DR_BASE_OBJECT (dr) = DR_REF (dr);
- DR_ACCESS_FNS (dr) = NULL;
+ DR_ACCESS_FNS (dr).create (0);
return;
}
if (TREE_CODE (ref) == REALPART_EXPR)
{
ref = TREE_OPERAND (ref, 0);
- VEC_safe_push (tree, heap, access_fns, integer_zero_node);
+ access_fns.safe_push (integer_zero_node);
}
else if (TREE_CODE (ref) == IMAGPART_EXPR)
{
ref = TREE_OPERAND (ref, 0);
- VEC_safe_push (tree, heap, access_fns, integer_one_node);
+ access_fns.safe_push (integer_one_node);
}
/* Analyze access functions of dimensions we know to be independent. */
op = TREE_OPERAND (ref, 1);
access_fn = analyze_scalar_evolution (loop, op);
access_fn = instantiate_scev (before_loop, loop, access_fn);
- VEC_safe_push (tree, heap, access_fns, access_fn);
+ access_fns.safe_push (access_fn);
}
else if (TREE_CODE (ref) == COMPONENT_REF
&& TREE_CODE (TREE_TYPE (TREE_OPERAND (ref, 0))) == RECORD_TYPE)
fold_convert (bitsizetype, off),
bitsize_int (BITS_PER_UNIT)),
DECL_FIELD_BIT_OFFSET (TREE_OPERAND (ref, 1)));
- VEC_safe_push (tree, heap, access_fns, off);
+ access_fns.safe_push (off);
}
else
/* If we have an unhandled component we could not translate
orig_type = TREE_TYPE (base);
STRIP_USELESS_TYPE_CONVERSION (base);
split_constant_offset (base, &base, &off);
+ STRIP_USELESS_TYPE_CONVERSION (base);
/* Fold the MEM_REF offset into the evolutions initial
value to make more bases comparable. */
if (!integer_zerop (memoff))
fold_convert (ssizetype, memoff));
memoff = build_int_cst (TREE_TYPE (memoff), 0);
}
+ /* Adjust the offset so it is a multiple of the access type
+ size and thus we separate bases that can possibly be used
+ to produce partial overlaps (which the access_fn machinery
+ cannot handle). */
+ wide_int rem;
+ if (TYPE_SIZE_UNIT (TREE_TYPE (ref))
+ && TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (ref))) == INTEGER_CST
+ && !integer_zerop (TYPE_SIZE_UNIT (TREE_TYPE (ref))))
+ rem = wi::mod_trunc (off, TYPE_SIZE_UNIT (TREE_TYPE (ref)), SIGNED);
+ else
+ /* If we can't compute the remainder simply force the initial
+ condition to zero. */
+ rem = off;
+ off = wide_int_to_tree (ssizetype, wi::sub (off, rem));
+ memoff = wide_int_to_tree (TREE_TYPE (memoff), rem);
+ /* And finally replace the initial condition. */
access_fn = chrec_replace_initial_condition
(access_fn, fold_convert (orig_type, off));
/* ??? This is still not a suitable base object for
guaranteed.
As a band-aid, mark the access so we can special-case
it in dr_may_alias_p. */
+ tree old = ref;
ref = fold_build2_loc (EXPR_LOCATION (ref),
MEM_REF, TREE_TYPE (ref),
base, memoff);
+ MR_DEPENDENCE_CLIQUE (ref) = MR_DEPENDENCE_CLIQUE (old);
+ MR_DEPENDENCE_BASE (ref) = MR_DEPENDENCE_BASE (old);
DR_UNCONSTRAINED_BASE (dr) = true;
- VEC_safe_push (tree, heap, access_fns, access_fn);
+ access_fns.safe_push (access_fn);
}
}
else if (DECL_P (ref))
void
free_data_ref (data_reference_p dr)
{
- VEC_free (tree, heap, DR_ACCESS_FNS (dr));
+ DR_ACCESS_FNS (dr).release ();
free (dr);
}
static bool
affine_function_equal_p (affine_fn fna, affine_fn fnb)
{
- unsigned i, n = VEC_length (tree, fna);
+ unsigned i, n = fna.length ();
- if (n != VEC_length (tree, fnb))
+ if (n != fnb.length ())
return false;
for (i = 0; i < n; i++)
- if (!operand_equal_p (VEC_index (tree, fna, i),
- VEC_index (tree, fnb, i), 0))
+ if (!operand_equal_p (fna[i], fnb[i], 0))
return false;
return true;
affine_fn comm;
if (!CF_NONTRIVIAL_P (cf))
- return NULL;
+ return affine_fn ();
comm = cf->fns[0];
for (i = 1; i < cf->n; i++)
if (!affine_function_equal_p (comm, cf->fns[i]))
- return NULL;
+ return affine_fn ();
return comm;
}
static tree
affine_function_base (affine_fn fn)
{
- return VEC_index (tree, fn, 0);
+ return fn[0];
}
/* Returns true if FN is a constant. */
unsigned i;
tree coef;
- for (i = 1; VEC_iterate (tree, fn, i, coef); i++)
+ for (i = 1; fn.iterate (i, &coef); i++)
if (!integer_zerop (coef))
return false;
affine_fn ret;
tree coef;
- if (VEC_length (tree, fnb) > VEC_length (tree, fna))
+ if (fnb.length () > fna.length ())
{
- n = VEC_length (tree, fna);
- m = VEC_length (tree, fnb);
+ n = fna.length ();
+ m = fnb.length ();
}
else
{
- n = VEC_length (tree, fnb);
- m = VEC_length (tree, fna);
+ n = fnb.length ();
+ m = fna.length ();
}
- ret = VEC_alloc (tree, heap, m);
+ ret.create (m);
for (i = 0; i < n; i++)
{
- tree type = signed_type_for_types (TREE_TYPE (VEC_index (tree, fna, i)),
- TREE_TYPE (VEC_index (tree, fnb, i)));
-
- VEC_quick_push (tree, ret,
- fold_build2 (op, type,
- VEC_index (tree, fna, i),
- VEC_index (tree, fnb, i)));
+ tree type = signed_type_for_types (TREE_TYPE (fna[i]),
+ TREE_TYPE (fnb[i]));
+ ret.quick_push (fold_build2 (op, type, fna[i], fnb[i]));
}
- for (; VEC_iterate (tree, fna, i, coef); i++)
- VEC_quick_push (tree, ret,
- fold_build2 (op, signed_type_for (TREE_TYPE (coef)),
+ for (; fna.iterate (i, &coef); i++)
+ ret.quick_push (fold_build2 (op, signed_type_for (TREE_TYPE (coef)),
coef, integer_zero_node));
- for (; VEC_iterate (tree, fnb, i, coef); i++)
- VEC_quick_push (tree, ret,
- fold_build2 (op, signed_type_for (TREE_TYPE (coef)),
+ for (; fnb.iterate (i, &coef); i++)
+ ret.quick_push (fold_build2 (op, signed_type_for (TREE_TYPE (coef)),
integer_zero_node, coef));
return ret;
static void
affine_fn_free (affine_fn fn)
{
- VEC_free (tree, heap, fn);
+ fn.release ();
}
/* Determine for each subscript in the data dependence relation DDR
fn_a = common_affine_function (cf_a);
fn_b = common_affine_function (cf_b);
- if (!fn_a || !fn_b)
+ if (!fn_a.exists () || !fn_b.exists ())
{
SUB_DISTANCE (subscript) = chrec_dont_know;
return;
if (!loop_nest)
{
aff_tree off1, off2;
- double_int size1, size2;
+ widest_int size1, size2;
get_inner_reference_aff (DR_REF (a), &off1, &size1);
get_inner_reference_aff (DR_REF (b), &off2, &size2);
- aff_combination_scale (&off1, double_int_minus_one);
+ aff_combination_scale (&off1, -1);
aff_combination_add (&off2, &off1);
if (aff_comb_cannot_overlap_p (&off2, size1, size2))
return false;
}
- /* If we had an evolution in a MEM_REF BASE_OBJECT we do not know
- the size of the base-object. So we cannot do any offset/overlap
- based analysis but have to rely on points-to information only. */
+ if ((TREE_CODE (addr_a) == MEM_REF || TREE_CODE (addr_a) == TARGET_MEM_REF)
+ && (TREE_CODE (addr_b) == MEM_REF || TREE_CODE (addr_b) == TARGET_MEM_REF)
+ && MR_DEPENDENCE_CLIQUE (addr_a) == MR_DEPENDENCE_CLIQUE (addr_b)
+ && MR_DEPENDENCE_BASE (addr_a) != MR_DEPENDENCE_BASE (addr_b))
+ return false;
+
+ /* If we had an evolution in a pointer-based MEM_REF BASE_OBJECT we
+ do not know the size of the base-object. So we cannot do any
+ offset/overlap based analysis but have to rely on points-to
+ information only. */
if (TREE_CODE (addr_a) == MEM_REF
- && DR_UNCONSTRAINED_BASE (a))
+ && (DR_UNCONSTRAINED_BASE (a)
+ || TREE_CODE (TREE_OPERAND (addr_a, 0)) == SSA_NAME))
{
- if (TREE_CODE (addr_b) == MEM_REF
- && DR_UNCONSTRAINED_BASE (b))
+ /* For true dependences we can apply TBAA. */
+ if (flag_strict_aliasing
+ && DR_IS_WRITE (a) && DR_IS_READ (b)
+ && !alias_sets_conflict_p (get_alias_set (DR_REF (a)),
+ get_alias_set (DR_REF (b))))
+ return false;
+ if (TREE_CODE (addr_b) == MEM_REF)
return ptr_derefs_may_alias_p (TREE_OPERAND (addr_a, 0),
TREE_OPERAND (addr_b, 0));
else
build_fold_addr_expr (addr_b));
}
else if (TREE_CODE (addr_b) == MEM_REF
- && DR_UNCONSTRAINED_BASE (b))
- return ptr_derefs_may_alias_p (build_fold_addr_expr (addr_a),
- TREE_OPERAND (addr_b, 0));
+ && (DR_UNCONSTRAINED_BASE (b)
+ || TREE_CODE (TREE_OPERAND (addr_b, 0)) == SSA_NAME))
+ {
+ /* For true dependences we can apply TBAA. */
+ if (flag_strict_aliasing
+ && DR_IS_WRITE (a) && DR_IS_READ (b)
+ && !alias_sets_conflict_p (get_alias_set (DR_REF (a)),
+ get_alias_set (DR_REF (b))))
+ return false;
+ if (TREE_CODE (addr_a) == MEM_REF)
+ return ptr_derefs_may_alias_p (TREE_OPERAND (addr_a, 0),
+ TREE_OPERAND (addr_b, 0));
+ else
+ return ptr_derefs_may_alias_p (build_fold_addr_expr (addr_a),
+ TREE_OPERAND (addr_b, 0));
+ }
/* Otherwise DR_BASE_OBJECT is an access that covers the whole object
that is being subsetted in the loop nest. */
struct data_dependence_relation *
initialize_data_dependence_relation (struct data_reference *a,
struct data_reference *b,
- VEC (loop_p, heap) *loop_nest)
+ vec<loop_p> loop_nest)
{
struct data_dependence_relation *res;
unsigned int i;
res = XNEW (struct data_dependence_relation);
DDR_A (res) = a;
DDR_B (res) = b;
- DDR_LOOP_NEST (res) = NULL;
+ DDR_LOOP_NEST (res).create (0);
DDR_REVERSED_P (res) = false;
- DDR_SUBSCRIPTS (res) = NULL;
- DDR_DIR_VECTS (res) = NULL;
- DDR_DIST_VECTS (res) = NULL;
+ DDR_SUBSCRIPTS (res).create (0);
+ DDR_DIR_VECTS (res).create (0);
+ DDR_DIST_VECTS (res).create (0);
if (a == NULL || b == NULL)
{
}
/* If the data references do not alias, then they are independent. */
- if (!dr_may_alias_p (a, b, loop_nest != NULL))
+ if (!dr_may_alias_p (a, b, loop_nest.exists ()))
{
DDR_ARE_DEPENDENT (res) = chrec_known;
return res;
/* The case where the references are exactly the same. */
if (operand_equal_p (DR_REF (a), DR_REF (b), 0))
{
- if (loop_nest
- && !object_address_invariant_in_loop_p (VEC_index (loop_p, loop_nest, 0),
+ if (loop_nest.exists ()
+ && !object_address_invariant_in_loop_p (loop_nest[0],
DR_BASE_OBJECT (a)))
{
DDR_ARE_DEPENDENT (res) = chrec_dont_know;
}
DDR_AFFINE_P (res) = true;
DDR_ARE_DEPENDENT (res) = NULL_TREE;
- DDR_SUBSCRIPTS (res) = VEC_alloc (subscript_p, heap, DR_NUM_DIMENSIONS (a));
+ DDR_SUBSCRIPTS (res).create (DR_NUM_DIMENSIONS (a));
DDR_LOOP_NEST (res) = loop_nest;
DDR_INNER_LOOP (res) = 0;
DDR_SELF_REFERENCE (res) = true;
SUB_CONFLICTS_IN_B (subscript) = conflict_fn_not_known ();
SUB_LAST_CONFLICT (subscript) = chrec_dont_know;
SUB_DISTANCE (subscript) = chrec_dont_know;
- VEC_safe_push (subscript_p, heap, DDR_SUBSCRIPTS (res), subscript);
+ DDR_SUBSCRIPTS (res).safe_push (subscript);
}
return res;
}
/* If the base of the object is not invariant in the loop nest, we cannot
analyze it. TODO -- in fact, it would suffice to record that there may
be arbitrary dependences in the loops where the base object varies. */
- if (loop_nest
- && !object_address_invariant_in_loop_p (VEC_index (loop_p, loop_nest, 0),
+ if (loop_nest.exists ()
+ && !object_address_invariant_in_loop_p (loop_nest[0],
DR_BASE_OBJECT (a)))
{
DDR_ARE_DEPENDENT (res) = chrec_dont_know;
DDR_AFFINE_P (res) = true;
DDR_ARE_DEPENDENT (res) = NULL_TREE;
- DDR_SUBSCRIPTS (res) = VEC_alloc (subscript_p, heap, DR_NUM_DIMENSIONS (a));
+ DDR_SUBSCRIPTS (res).create (DR_NUM_DIMENSIONS (a));
DDR_LOOP_NEST (res) = loop_nest;
DDR_INNER_LOOP (res) = 0;
DDR_SELF_REFERENCE (res) = false;
SUB_CONFLICTS_IN_B (subscript) = conflict_fn_not_known ();
SUB_LAST_CONFLICT (subscript) = chrec_dont_know;
SUB_DISTANCE (subscript) = chrec_dont_know;
- VEC_safe_push (subscript_p, heap, DDR_SUBSCRIPTS (res), subscript);
+ DDR_SUBSCRIPTS (res).safe_push (subscript);
}
return res;
/* Frees memory used by SUBSCRIPTS. */
static void
-free_subscripts (VEC (subscript_p, heap) *subscripts)
+free_subscripts (vec<subscript_p> subscripts)
{
unsigned i;
subscript_p s;
- FOR_EACH_VEC_ELT (subscript_p, subscripts, i, s)
+ FOR_EACH_VEC_ELT (subscripts, i, s)
{
free_conflict_function (s->conflicting_iterations_in_a);
free_conflict_function (s->conflicting_iterations_in_b);
free (s);
}
- VEC_free (subscript_p, heap, subscripts);
+ subscripts.release ();
}
/* Set DDR_ARE_DEPENDENT to CHREC and finalize the subscript overlap
finalize_ddr_dependent (struct data_dependence_relation *ddr,
tree chrec)
{
- if (dump_file && (dump_flags & TDF_DETAILS))
- {
- fprintf (dump_file, "(dependence classified: ");
- print_generic_expr (dump_file, chrec, 0);
- fprintf (dump_file, ")\n");
- }
-
DDR_ARE_DEPENDENT (ddr) = chrec;
free_subscripts (DDR_SUBSCRIPTS (ddr));
- DDR_SUBSCRIPTS (ddr) = NULL;
+ DDR_SUBSCRIPTS (ddr).create (0);
}
/* The dependence relation DDR cannot be represented by a distance
va_list ap;
gcc_assert (0 < n && n <= MAX_DIM);
- va_start(ap, n);
+ va_start (ap, n);
ret->n = n;
for (i = 0; i < n; i++)
ret->fns[i] = va_arg (ap, affine_fn);
- va_end(ap);
+ va_end (ap);
return ret;
}
static affine_fn
affine_fn_cst (tree cst)
{
- affine_fn fn = VEC_alloc (tree, heap, 1);
- VEC_quick_push (tree, fn, cst);
+ affine_fn fn;
+ fn.create (1);
+ fn.quick_push (cst);
return fn;
}
static affine_fn
affine_fn_univar (tree cst, unsigned dim, tree coef)
{
- affine_fn fn = VEC_alloc (tree, heap, dim + 1);
+ affine_fn fn;
+ fn.create (dim + 1);
unsigned i;
gcc_assert (dim > 0);
- VEC_quick_push (tree, fn, cst);
+ fn.quick_push (cst);
for (i = 1; i < dim; i++)
- VEC_quick_push (tree, fn, integer_zero_node);
- VEC_quick_push (tree, fn, coef);
+ fn.quick_push (integer_zero_node);
+ fn.quick_push (coef);
return fn;
}
static tree
max_stmt_executions_tree (struct loop *loop)
{
- double_int nit;
+ widest_int nit;
if (!max_stmt_executions (loop, &nit))
return chrec_dont_know;
- if (!double_int_fits_to_tree_p (unsigned_type_node, nit))
+ if (!wi::fits_to_tree_p (nit, unsigned_type_node))
return chrec_dont_know;
- return double_int_to_tree (unsigned_type_node, nit);
+ return wide_int_to_tree (unsigned_type_node, nit);
}
/* Determine whether the CHREC is always positive/negative. If the expression
return chrec_fold_op (TREE_CODE (chrec), chrec_type (chrec), op0, op1);
}
- case NOP_EXPR:
+ CASE_CONVERT:
{
tree op = initialize_matrix_A (A, TREE_OPERAND (chrec, 0), index, mult);
return chrec_convert (chrec_type (chrec), op, NULL);
mat[r2][i] += const1 * mat[r1][i];
}
-/* Swap rows R1 and R2 in matrix MAT. */
-
-static void
-lambda_matrix_row_exchange (lambda_matrix mat, int r1, int r2)
-{
- lambda_vector row;
-
- row = mat[r1];
- mat[r1] = mat[r2];
- mat[r2] = row;
-}
-
/* Multiply vector VEC1 of length SIZE by a constant CONST1,
and store the result in VEC2. */
factor = sigma * (a / b);
lambda_matrix_row_add (S, n, i, i-1, -factor);
- lambda_matrix_row_exchange (S, i, i-1);
+ std::swap (S[i], S[i-1]);
lambda_matrix_row_add (U, m, i, i-1, -factor);
- lambda_matrix_row_exchange (U, i, i-1);
+ std::swap (U[i], U[i-1]);
}
}
}
dump_conflict_function (dump_file, *overlaps_a);
fprintf (dump_file, ")\n (overlaps_b = ");
dump_conflict_function (dump_file, *overlaps_b);
- fprintf (dump_file, ")\n");
- fprintf (dump_file, ")\n");
+ fprintf (dump_file, "))\n");
}
}
{
siv_subscript_dontknow:;
if (dump_file && (dump_flags & TDF_DETAILS))
- fprintf (dump_file, "siv test failed: unimplemented.\n");
+ fprintf (dump_file, " siv test failed: unimplemented");
*overlaps_a = conflict_fn_not_known ();
*overlaps_b = conflict_fn_not_known ();
*last_conflicts = chrec_dont_know;
HOST_WIDE_INT cd = 0, val;
tree step;
- if (!host_integerp (cst, 0))
+ if (!tree_fits_shwi_p (cst))
return true;
- val = tree_low_cst (cst, 0);
+ val = tree_to_shwi (cst);
while (TREE_CODE (chrec) == POLYNOMIAL_CHREC)
{
step = CHREC_RIGHT (chrec);
- if (!host_integerp (step, 0))
+ if (!tree_fits_shwi_p (step))
return true;
- cd = gcd (cd, tree_low_cst (step, 0));
+ cd = gcd (cd, tree_to_shwi (step));
chrec = CHREC_LEFT (chrec);
}
dump_conflict_function (dump_file, *overlap_iterations_a);
fprintf (dump_file, ")\n (overlap_iterations_b = ");
dump_conflict_function (dump_file, *overlap_iterations_b);
- fprintf (dump_file, ")\n");
- fprintf (dump_file, ")\n");
+ fprintf (dump_file, "))\n");
}
}
unsigned i;
lambda_vector v;
- FOR_EACH_VEC_ELT (lambda_vector, DDR_DIST_VECTS (ddr), i, v)
+ FOR_EACH_VEC_ELT (DDR_DIST_VECTS (ddr), i, v)
if (lambda_vector_equal (v, dist_v, DDR_NB_LOOPS (ddr)))
return;
- VEC_safe_push (lambda_vector, heap, DDR_DIST_VECTS (ddr), dist_v);
+ DDR_DIST_VECTS (ddr).safe_push (dist_v);
}
/* Helper function for uniquely inserting direction vectors. */
unsigned i;
lambda_vector v;
- FOR_EACH_VEC_ELT (lambda_vector, DDR_DIR_VECTS (ddr), i, v)
+ FOR_EACH_VEC_ELT (DDR_DIR_VECTS (ddr), i, v)
if (lambda_vector_equal (v, dir_v, DDR_NB_LOOPS (ddr)))
return;
- VEC_safe_push (lambda_vector, heap, DDR_DIR_VECTS (ddr), dir_v);
+ DDR_DIR_VECTS (ddr).safe_push (dir_v);
}
/* Add a distance of 1 on all the loops outer than INDEX. If we
unsigned i, j;
lambda_vector dist_v;
- FOR_EACH_VEC_ELT (lambda_vector, DDR_DIST_VECTS (ddr), i, dist_v)
+ FOR_EACH_VEC_ELT (DDR_DIST_VECTS (ddr), i, dist_v)
{
lambda_vector dir_v = lambda_vector_new (DDR_NB_LOOPS (ddr));
struct subscript *subscript;
tree res = NULL_TREE;
- for (i = 0; VEC_iterate (subscript_p, DDR_SUBSCRIPTS (ddr), i, subscript);
- i++)
+ for (i = 0; DDR_SUBSCRIPTS (ddr).iterate (i, &subscript); i++)
{
conflict_function *overlaps_a, *overlaps_b;
subscript_dependence_tester (struct data_dependence_relation *ddr,
struct loop *loop_nest)
{
-
- if (dump_file && (dump_flags & TDF_DETAILS))
- fprintf (dump_file, "(subscript_dependence_tester \n");
-
if (subscript_dependence_tester_1 (ddr, DDR_A (ddr), DDR_B (ddr), loop_nest))
dependence_stats.num_dependence_dependent++;
compute_subscript_distance (ddr);
if (build_classic_dist_vector (ddr, loop_nest))
build_classic_dir_vector (ddr);
-
- if (dump_file && (dump_flags & TDF_DETAILS))
- fprintf (dump_file, ")\n");
}
/* Returns true when all the access functions of A are affine or
const struct loop *loop_nest)
{
unsigned int i;
- VEC(tree,heap) *fns = DR_ACCESS_FNS (a);
+ vec<tree> fns = DR_ACCESS_FNS (a);
tree t;
- FOR_EACH_VEC_ELT (tree, fns, i, t)
+ FOR_EACH_VEC_ELT (fns, i, t)
if (!evolution_function_is_invariant_p (t, loop_nest->num)
&& !evolution_function_is_affine_multivariate_p (t, loop_nest->num))
return false;
problem that we have initialized until now. On top of this we
add new constraints. */
for (i = 0; i <= DDR_INNER_LOOP (ddr)
- && VEC_iterate (loop_p, DDR_LOOP_NEST (ddr), i, loopi); i++)
+ && DDR_LOOP_NEST (ddr).iterate (i, &loopi); i++)
{
int dist = 0;
omega_pb copy = omega_alloc_problem (2 * DDR_NB_LOOPS (ddr),
omega_copy_problem (copy, pb);
/* For all the outer loops "loop_j", add "dj = 0". */
- for (j = 0;
- j < i && VEC_iterate (loop_p, DDR_LOOP_NEST (ddr), j, loopj); j++)
+ for (j = 0; j < i && DDR_LOOP_NEST (ddr).iterate (j, &loopj); j++)
{
eq = omega_add_zero_eq (copy, omega_black);
copy->eqs[eq].coef[j + 1] = 1;
{
/* Reinitialize problem... */
omega_copy_problem (copy, pb);
- for (j = 0;
- j < i && VEC_iterate (loop_p, DDR_LOOP_NEST (ddr), j, loopj); j++)
+ for (j = 0; j < i && DDR_LOOP_NEST (ddr).iterate (j, &loopj); j++)
{
eq = omega_add_zero_eq (copy, omega_black);
copy->eqs[eq].coef[j + 1] = 1;
- coef[nb_loops + 1, 2*nb_loops] are the loop variables: "loop_x".
*/
for (i = 0; i <= DDR_INNER_LOOP (ddr)
- && VEC_iterate (loop_p, DDR_LOOP_NEST (ddr), i, loopi); i++)
+ && DDR_LOOP_NEST (ddr).iterate (i, &loopi); i++)
{
HOST_WIDE_INT nbi = max_stmt_executions_int (loopi);
static bool
ddr_consistent_p (FILE *file,
struct data_dependence_relation *ddr,
- VEC (lambda_vector, heap) *dist_vects,
- VEC (lambda_vector, heap) *dir_vects)
+ vec<lambda_vector> dist_vects,
+ vec<lambda_vector> dir_vects)
{
unsigned int i, j;
if (dump_file && (dump_flags & TDF_DETAILS))
file = dump_file;
- if (VEC_length (lambda_vector, dist_vects) != DDR_NUM_DIST_VECTS (ddr))
+ if (dist_vects.length () != DDR_NUM_DIST_VECTS (ddr))
{
lambda_vector b_dist_v;
fprintf (file, "\n(Number of distance vectors differ: Banerjee has %d, Omega has %d.\n",
- VEC_length (lambda_vector, dist_vects),
+ dist_vects.length (),
DDR_NUM_DIST_VECTS (ddr));
fprintf (file, "Banerjee dist vectors:\n");
- FOR_EACH_VEC_ELT (lambda_vector, dist_vects, i, b_dist_v)
+ FOR_EACH_VEC_ELT (dist_vects, i, b_dist_v)
print_lambda_vector (file, b_dist_v, DDR_NB_LOOPS (ddr));
fprintf (file, "Omega dist vectors:\n");
return false;
}
- if (VEC_length (lambda_vector, dir_vects) != DDR_NUM_DIR_VECTS (ddr))
+ if (dir_vects.length () != DDR_NUM_DIR_VECTS (ddr))
{
fprintf (file, "\n(Number of direction vectors differ: Banerjee has %d, Omega has %d.)\n",
- VEC_length (lambda_vector, dir_vects),
+ dir_vects.length (),
DDR_NUM_DIR_VECTS (ddr));
return false;
}
/* Distance vectors are not ordered in the same way in the DDR
and in the DIST_VECTS: search for a matching vector. */
- FOR_EACH_VEC_ELT (lambda_vector, dist_vects, j, a_dist_v)
+ FOR_EACH_VEC_ELT (dist_vects, j, a_dist_v)
if (lambda_vector_equal (a_dist_v, b_dist_v, DDR_NB_LOOPS (ddr)))
break;
- if (j == VEC_length (lambda_vector, dist_vects))
+ if (j == dist_vects.length ())
{
fprintf (file, "\n(Dist vectors from the first dependence analyzer:\n");
print_dist_vectors (file, dist_vects, DDR_NB_LOOPS (ddr));
/* Direction vectors are not ordered in the same way in the DDR
and in the DIR_VECTS: search for a matching vector. */
- FOR_EACH_VEC_ELT (lambda_vector, dir_vects, j, a_dir_v)
+ FOR_EACH_VEC_ELT (dir_vects, j, a_dir_v)
if (lambda_vector_equal (a_dir_v, b_dir_v, DDR_NB_LOOPS (ddr)))
break;
- if (j == VEC_length (lambda_vector, dist_vects))
+ if (j == dist_vects.length ())
{
fprintf (file, "\n(Dir vectors from the first dependence analyzer:\n");
print_dir_vectors (file, dir_vects, DDR_NB_LOOPS (ddr));
relation the first time we detect a CHREC_KNOWN element for a given
subscript. */
-static void
+void
compute_affine_dependence (struct data_dependence_relation *ddr,
struct loop *loop_nest)
{
if (access_functions_are_affine_or_constant_p (dra, loop_nest)
&& access_functions_are_affine_or_constant_p (drb, loop_nest))
{
+ subscript_dependence_tester (ddr, loop_nest);
+
if (flag_check_data_deps)
{
- /* Compute the dependences using the first algorithm. */
- subscript_dependence_tester (ddr, loop_nest);
-
+ /* Dump the dependences from the first algorithm. */
if (dump_file && (dump_flags & TDF_DETAILS))
{
fprintf (dump_file, "\n\nBanerjee Analyzer\n");
if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE)
{
bool maybe_dependent;
- VEC (lambda_vector, heap) *dir_vects, *dist_vects;
+ vec<lambda_vector> dir_vects, dist_vects;
/* Save the result of the first DD analyzer. */
dist_vects = DDR_DIST_VECTS (ddr);
dir_vects = DDR_DIR_VECTS (ddr);
/* Reset the information. */
- DDR_DIST_VECTS (ddr) = NULL;
- DDR_DIR_VECTS (ddr) = NULL;
+ DDR_DIST_VECTS (ddr).create (0);
+ DDR_DIR_VECTS (ddr).create (0);
/* Compute the same information using Omega. */
if (!init_omega_for_ddr (ddr, &maybe_dependent))
dir_vects));
}
}
- else
- subscript_dependence_tester (ddr, loop_nest);
}
/* As a last case, if the dependence cannot be determined, or if
is small enough to be handled. */
bool
-compute_all_dependences (VEC (data_reference_p, heap) *datarefs,
- VEC (ddr_p, heap) **dependence_relations,
- VEC (loop_p, heap) *loop_nest,
+compute_all_dependences (vec<data_reference_p> datarefs,
+ vec<ddr_p> *dependence_relations,
+ vec<loop_p> loop_nest,
bool compute_self_and_rr)
{
struct data_dependence_relation *ddr;
struct data_reference *a, *b;
unsigned int i, j;
- if ((int) VEC_length (data_reference_p, datarefs)
+ if ((int) datarefs.length ()
> PARAM_VALUE (PARAM_LOOP_MAX_DATAREFS_FOR_DATADEPS))
{
struct data_dependence_relation *ddr;
/* Insert a single relation into dependence_relations:
chrec_dont_know. */
ddr = initialize_data_dependence_relation (NULL, NULL, loop_nest);
- VEC_safe_push (ddr_p, heap, *dependence_relations, ddr);
+ dependence_relations->safe_push (ddr);
return false;
}
- FOR_EACH_VEC_ELT (data_reference_p, datarefs, i, a)
- for (j = i + 1; VEC_iterate (data_reference_p, datarefs, j, b); j++)
+ FOR_EACH_VEC_ELT (datarefs, i, a)
+ for (j = i + 1; datarefs.iterate (j, &b); j++)
if (DR_IS_WRITE (a) || DR_IS_WRITE (b) || compute_self_and_rr)
{
ddr = initialize_data_dependence_relation (a, b, loop_nest);
- VEC_safe_push (ddr_p, heap, *dependence_relations, ddr);
- if (loop_nest)
- compute_affine_dependence (ddr, VEC_index (loop_p, loop_nest, 0));
+ dependence_relations->safe_push (ddr);
+ if (loop_nest.exists ())
+ compute_affine_dependence (ddr, loop_nest[0]);
}
if (compute_self_and_rr)
- FOR_EACH_VEC_ELT (data_reference_p, datarefs, i, a)
+ FOR_EACH_VEC_ELT (datarefs, i, a)
{
ddr = initialize_data_dependence_relation (a, a, loop_nest);
- VEC_safe_push (ddr_p, heap, *dependence_relations, ddr);
- if (loop_nest)
- compute_affine_dependence (ddr, VEC_index (loop_p, loop_nest, 0));
+ dependence_relations->safe_push (ddr);
+ if (loop_nest.exists ())
+ compute_affine_dependence (ddr, loop_nest[0]);
}
return true;
typedef struct data_ref_loc_d
{
- /* Position of the memory reference. */
- tree *pos;
+ /* The memory reference. */
+ tree ref;
- /* True if the memory reference is read. */
- bool is_read;
+ /* True if the memory reference is read. */
+ bool is_read;
} data_ref_loc;
-DEF_VEC_O (data_ref_loc);
-DEF_VEC_ALLOC_O (data_ref_loc, heap);
/* Stores the locations of memory references in STMT to REFERENCES. Returns
true if STMT clobbers memory, false otherwise. */
static bool
-get_references_in_stmt (gimple stmt, VEC (data_ref_loc, heap) **references)
+get_references_in_stmt (gimple stmt, vec<data_ref_loc, va_heap> *references)
{
bool clobbers_memory = false;
- data_ref_loc *ref;
- tree *op0, *op1;
+ data_ref_loc ref;
+ tree op0, op1;
enum gimple_code stmt_code = gimple_code (stmt);
- *references = NULL;
-
/* ASM_EXPR and CALL_EXPR may embed arbitrary side effects.
- Calls have side-effects, except those to const or pure
- functions. */
- if ((stmt_code == GIMPLE_CALL
- && !(gimple_call_flags (stmt) & (ECF_CONST | ECF_PURE)))
- || (stmt_code == GIMPLE_ASM
- && (gimple_asm_volatile_p (stmt) || gimple_vuse (stmt))))
+ As we cannot model data-references to not spelled out
+ accesses give up if they may occur. */
+ if (stmt_code == GIMPLE_CALL
+ && !(gimple_call_flags (stmt) & ECF_CONST))
+ {
+ /* Allow IFN_GOMP_SIMD_LANE in their own loops. */
+ if (gimple_call_internal_p (stmt))
+ switch (gimple_call_internal_fn (stmt))
+ {
+ case IFN_GOMP_SIMD_LANE:
+ {
+ struct loop *loop = gimple_bb (stmt)->loop_father;
+ tree uid = gimple_call_arg (stmt, 0);
+ gcc_assert (TREE_CODE (uid) == SSA_NAME);
+ if (loop == NULL
+ || loop->simduid != SSA_NAME_VAR (uid))
+ clobbers_memory = true;
+ break;
+ }
+ case IFN_MASK_LOAD:
+ case IFN_MASK_STORE:
+ break;
+ default:
+ clobbers_memory = true;
+ break;
+ }
+ else
+ clobbers_memory = true;
+ }
+ else if (stmt_code == GIMPLE_ASM
+ && (gimple_asm_volatile_p (as_a <gasm *> (stmt))
+ || gimple_vuse (stmt)))
clobbers_memory = true;
if (!gimple_vuse (stmt))
if (stmt_code == GIMPLE_ASSIGN)
{
tree base;
- op0 = gimple_assign_lhs_ptr (stmt);
- op1 = gimple_assign_rhs1_ptr (stmt);
+ op0 = gimple_assign_lhs (stmt);
+ op1 = gimple_assign_rhs1 (stmt);
- if (DECL_P (*op1)
- || (REFERENCE_CLASS_P (*op1)
- && (base = get_base_address (*op1))
+ if (DECL_P (op1)
+ || (REFERENCE_CLASS_P (op1)
+ && (base = get_base_address (op1))
&& TREE_CODE (base) != SSA_NAME))
{
- ref = VEC_safe_push (data_ref_loc, heap, *references, NULL);
- ref->pos = op1;
- ref->is_read = true;
+ ref.ref = op1;
+ ref.is_read = true;
+ references->safe_push (ref);
}
}
else if (stmt_code == GIMPLE_CALL)
{
unsigned i, n;
- op0 = gimple_call_lhs_ptr (stmt);
+ ref.is_read = false;
+ if (gimple_call_internal_p (stmt))
+ switch (gimple_call_internal_fn (stmt))
+ {
+ case IFN_MASK_LOAD:
+ if (gimple_call_lhs (stmt) == NULL_TREE)
+ break;
+ ref.is_read = true;
+ case IFN_MASK_STORE:
+ ref.ref = fold_build2 (MEM_REF,
+ ref.is_read
+ ? TREE_TYPE (gimple_call_lhs (stmt))
+ : TREE_TYPE (gimple_call_arg (stmt, 3)),
+ gimple_call_arg (stmt, 0),
+ gimple_call_arg (stmt, 1));
+ references->safe_push (ref);
+ return false;
+ default:
+ break;
+ }
+
+ op0 = gimple_call_lhs (stmt);
n = gimple_call_num_args (stmt);
for (i = 0; i < n; i++)
{
- op1 = gimple_call_arg_ptr (stmt, i);
+ op1 = gimple_call_arg (stmt, i);
- if (DECL_P (*op1)
- || (REFERENCE_CLASS_P (*op1) && get_base_address (*op1)))
+ if (DECL_P (op1)
+ || (REFERENCE_CLASS_P (op1) && get_base_address (op1)))
{
- ref = VEC_safe_push (data_ref_loc, heap, *references, NULL);
- ref->pos = op1;
- ref->is_read = true;
+ ref.ref = op1;
+ ref.is_read = true;
+ references->safe_push (ref);
}
}
}
else
return clobbers_memory;
- if (*op0
- && (DECL_P (*op0)
- || (REFERENCE_CLASS_P (*op0) && get_base_address (*op0))))
+ if (op0
+ && (DECL_P (op0)
+ || (REFERENCE_CLASS_P (op0) && get_base_address (op0))))
{
- ref = VEC_safe_push (data_ref_loc, heap, *references, NULL);
- ref->pos = op0;
- ref->is_read = false;
+ ref.ref = op0;
+ ref.is_read = false;
+ references->safe_push (ref);
}
return clobbers_memory;
}
bool
find_data_references_in_stmt (struct loop *nest, gimple stmt,
- VEC (data_reference_p, heap) **datarefs)
+ vec<data_reference_p> *datarefs)
{
unsigned i;
- VEC (data_ref_loc, heap) *references;
+ auto_vec<data_ref_loc, 2> references;
data_ref_loc *ref;
bool ret = true;
data_reference_p dr;
if (get_references_in_stmt (stmt, &references))
- {
- VEC_free (data_ref_loc, heap, references);
- return false;
- }
+ return false;
- FOR_EACH_VEC_ELT (data_ref_loc, references, i, ref)
+ FOR_EACH_VEC_ELT (references, i, ref)
{
dr = create_data_ref (nest, loop_containing_stmt (stmt),
- *ref->pos, stmt, ref->is_read);
+ ref->ref, stmt, ref->is_read);
gcc_assert (dr != NULL);
- VEC_safe_push (data_reference_p, heap, *datarefs, dr);
+ datarefs->safe_push (dr);
}
- VEC_free (data_ref_loc, heap, references);
+ references.release ();
return ret;
}
bool
graphite_find_data_references_in_stmt (loop_p nest, loop_p loop, gimple stmt,
- VEC (data_reference_p, heap) **datarefs)
+ vec<data_reference_p> *datarefs)
{
unsigned i;
- VEC (data_ref_loc, heap) *references;
+ auto_vec<data_ref_loc, 2> references;
data_ref_loc *ref;
bool ret = true;
data_reference_p dr;
if (get_references_in_stmt (stmt, &references))
- {
- VEC_free (data_ref_loc, heap, references);
- return false;
- }
+ return false;
- FOR_EACH_VEC_ELT (data_ref_loc, references, i, ref)
+ FOR_EACH_VEC_ELT (references, i, ref)
{
- dr = create_data_ref (nest, loop, *ref->pos, stmt, ref->is_read);
+ dr = create_data_ref (nest, loop, ref->ref, stmt, ref->is_read);
gcc_assert (dr != NULL);
- VEC_safe_push (data_reference_p, heap, *datarefs, dr);
+ datarefs->safe_push (dr);
}
- VEC_free (data_ref_loc, heap, references);
+ references.release ();
return ret;
}
tree
find_data_references_in_bb (struct loop *loop, basic_block bb,
- VEC (data_reference_p, heap) **datarefs)
+ vec<data_reference_p> *datarefs)
{
gimple_stmt_iterator bsi;
{
struct data_reference *res;
res = XCNEW (struct data_reference);
- VEC_safe_push (data_reference_p, heap, *datarefs, res);
+ datarefs->safe_push (res);
return chrec_dont_know;
}
TODO: This function should be made smarter so that it can handle address
arithmetic as if they were array accesses, etc. */
-static tree
+tree
find_data_references_in_loop (struct loop *loop,
- VEC (data_reference_p, heap) **datarefs)
+ vec<data_reference_p> *datarefs)
{
basic_block bb, *bbs;
unsigned int i;
/* Recursive helper function. */
static bool
-find_loop_nest_1 (struct loop *loop, VEC (loop_p, heap) **loop_nest)
+find_loop_nest_1 (struct loop *loop, vec<loop_p> *loop_nest)
{
/* Inner loops of the nest should not contain siblings. Example:
when there are two consecutive loops,
if (loop->next)
return false;
- VEC_safe_push (loop_p, heap, *loop_nest, loop);
+ loop_nest->safe_push (loop);
if (loop->inner)
return find_loop_nest_1 (loop->inner, loop_nest);
return true;
appear in the classic distance vector. */
bool
-find_loop_nest (struct loop *loop, VEC (loop_p, heap) **loop_nest)
+find_loop_nest (struct loop *loop, vec<loop_p> *loop_nest)
{
- VEC_safe_push (loop_p, heap, *loop_nest, loop);
+ loop_nest->safe_push (loop);
if (loop->inner)
return find_loop_nest_1 (loop->inner, loop_nest);
return true;
bool
compute_data_dependences_for_loop (struct loop *loop,
bool compute_self_and_read_read_dependences,
- VEC (loop_p, heap) **loop_nest,
- VEC (data_reference_p, heap) **datarefs,
- VEC (ddr_p, heap) **dependence_relations)
+ vec<loop_p> *loop_nest,
+ vec<data_reference_p> *datarefs,
+ vec<ddr_p> *dependence_relations)
{
bool res = true;
bool
compute_data_dependences_for_bb (basic_block bb,
bool compute_self_and_read_read_dependences,
- VEC (data_reference_p, heap) **datarefs,
- VEC (ddr_p, heap) **dependence_relations)
+ vec<data_reference_p> *datarefs,
+ vec<ddr_p> *dependence_relations)
{
if (find_data_references_in_bb (NULL, bb, datarefs) == chrec_dont_know)
return false;
- return compute_all_dependences (*datarefs, dependence_relations, NULL,
+ return compute_all_dependences (*datarefs, dependence_relations, vNULL,
compute_self_and_read_read_dependences);
}
{
unsigned int i;
int nb_data_refs = 10;
- VEC (data_reference_p, heap) *datarefs =
- VEC_alloc (data_reference_p, heap, nb_data_refs);
- VEC (ddr_p, heap) *dependence_relations =
- VEC_alloc (ddr_p, heap, nb_data_refs * nb_data_refs);
- VEC (loop_p, heap) *loop_nest = VEC_alloc (loop_p, heap, 3);
+ vec<data_reference_p> datarefs;
+ datarefs.create (nb_data_refs);
+ vec<ddr_p> dependence_relations;
+ dependence_relations.create (nb_data_refs * nb_data_refs);
+ vec<loop_p> loop_nest;
+ loop_nest.create (3);
/* Compute DDs on the whole function. */
compute_data_dependences_for_loop (loop, false, &loop_nest, &datarefs,
unsigned nb_chrec_relations = 0;
struct data_dependence_relation *ddr;
- FOR_EACH_VEC_ELT (ddr_p, dependence_relations, i, ddr)
+ FOR_EACH_VEC_ELT (dependence_relations, i, ddr)
{
if (chrec_contains_undetermined (DDR_ARE_DEPENDENT (ddr)))
nb_top_relations++;
}
}
- VEC_free (loop_p, heap, loop_nest);
+ loop_nest.release ();
free_dependence_relations (dependence_relations);
free_data_refs (datarefs);
}
void
tree_check_data_deps (void)
{
- loop_iterator li;
struct loop *loop_nest;
- FOR_EACH_LOOP (li, loop_nest, 0)
+ FOR_EACH_LOOP (loop_nest, 0)
analyze_all_data_dependences (loop_nest);
}
if (ddr == NULL)
return;
- if (DDR_SUBSCRIPTS (ddr))
+ if (DDR_SUBSCRIPTS (ddr).exists ())
free_subscripts (DDR_SUBSCRIPTS (ddr));
- if (DDR_DIST_VECTS (ddr))
- VEC_free (lambda_vector, heap, DDR_DIST_VECTS (ddr));
- if (DDR_DIR_VECTS (ddr))
- VEC_free (lambda_vector, heap, DDR_DIR_VECTS (ddr));
+ DDR_DIST_VECTS (ddr).release ();
+ DDR_DIR_VECTS (ddr).release ();
free (ddr);
}
DEPENDENCE_RELATIONS. */
void
-free_dependence_relations (VEC (ddr_p, heap) *dependence_relations)
+free_dependence_relations (vec<ddr_p> dependence_relations)
{
unsigned int i;
struct data_dependence_relation *ddr;
- FOR_EACH_VEC_ELT (ddr_p, dependence_relations, i, ddr)
+ FOR_EACH_VEC_ELT (dependence_relations, i, ddr)
if (ddr)
free_dependence_relation (ddr);
- VEC_free (ddr_p, heap, dependence_relations);
+ dependence_relations.release ();
}
/* Free the memory used by the data references from DATAREFS. */
void
-free_data_refs (VEC (data_reference_p, heap) *datarefs)
+free_data_refs (vec<data_reference_p> datarefs)
{
unsigned int i;
struct data_reference *dr;
- FOR_EACH_VEC_ELT (data_reference_p, datarefs, i, dr)
+ FOR_EACH_VEC_ELT (datarefs, i, dr)
free_data_ref (dr);
- VEC_free (data_reference_p, heap, datarefs);
-}
-
-\f
-
-/* Dump vertex I in RDG to FILE. */
-
-static void
-dump_rdg_vertex (FILE *file, struct graph *rdg, int i)
-{
- struct vertex *v = &(rdg->vertices[i]);
- struct graph_edge *e;
-
- fprintf (file, "(vertex %d: (%s%s) (in:", i,
- RDG_MEM_WRITE_STMT (rdg, i) ? "w" : "",
- RDG_MEM_READS_STMT (rdg, i) ? "r" : "");
-
- if (v->pred)
- for (e = v->pred; e; e = e->pred_next)
- fprintf (file, " %d", e->src);
-
- fprintf (file, ") (out:");
-
- if (v->succ)
- for (e = v->succ; e; e = e->succ_next)
- fprintf (file, " %d", e->dest);
-
- fprintf (file, ")\n");
- print_gimple_stmt (file, RDGV_STMT (v), 0, TDF_VOPS|TDF_MEMSYMS);
- fprintf (file, ")\n");
-}
-
-/* Call dump_rdg_vertex on stderr. */
-
-DEBUG_FUNCTION void
-debug_rdg_vertex (struct graph *rdg, int i)
-{
- dump_rdg_vertex (stderr, rdg, i);
-}
-
-/* Dump component C of RDG to FILE. If DUMPED is non-null, set the
- dumped vertices to that bitmap. */
-
-static void
-dump_rdg_component (FILE *file, struct graph *rdg, int c, bitmap dumped)
-{
- int i;
-
- fprintf (file, "(%d\n", c);
-
- for (i = 0; i < rdg->n_vertices; i++)
- if (rdg->vertices[i].component == c)
- {
- if (dumped)
- bitmap_set_bit (dumped, i);
-
- dump_rdg_vertex (file, rdg, i);
- }
-
- fprintf (file, ")\n");
-}
-
-/* Call dump_rdg_vertex on stderr. */
-
-DEBUG_FUNCTION void
-debug_rdg_component (struct graph *rdg, int c)
-{
- dump_rdg_component (stderr, rdg, c, NULL);
-}
-
-/* Dump the reduced dependence graph RDG to FILE. */
-
-void
-dump_rdg (FILE *file, struct graph *rdg)
-{
- int i;
- bitmap dumped = BITMAP_ALLOC (NULL);
-
- fprintf (file, "(rdg\n");
-
- for (i = 0; i < rdg->n_vertices; i++)
- if (!bitmap_bit_p (dumped, i))
- dump_rdg_component (file, rdg, rdg->vertices[i].component, dumped);
-
- fprintf (file, ")\n");
- BITMAP_FREE (dumped);
-}
-
-/* Call dump_rdg on stderr. */
-
-DEBUG_FUNCTION void
-debug_rdg (struct graph *rdg)
-{
- dump_rdg (stderr, rdg);
-}
-
-static void
-dot_rdg_1 (FILE *file, struct graph *rdg)
-{
- int i;
-
- fprintf (file, "digraph RDG {\n");
-
- for (i = 0; i < rdg->n_vertices; i++)
- {
- struct vertex *v = &(rdg->vertices[i]);
- struct graph_edge *e;
-
- /* Highlight reads from memory. */
- if (RDG_MEM_READS_STMT (rdg, i))
- fprintf (file, "%d [style=filled, fillcolor=green]\n", i);
-
- /* Highlight stores to memory. */
- if (RDG_MEM_WRITE_STMT (rdg, i))
- fprintf (file, "%d [style=filled, fillcolor=red]\n", i);
-
- if (v->succ)
- for (e = v->succ; e; e = e->succ_next)
- switch (RDGE_TYPE (e))
- {
- case input_dd:
- fprintf (file, "%d -> %d [label=input] \n", i, e->dest);
- break;
-
- case output_dd:
- fprintf (file, "%d -> %d [label=output] \n", i, e->dest);
- break;
-
- case flow_dd:
- /* These are the most common dependences: don't print these. */
- fprintf (file, "%d -> %d \n", i, e->dest);
- break;
-
- case anti_dd:
- fprintf (file, "%d -> %d [label=anti] \n", i, e->dest);
- break;
-
- default:
- gcc_unreachable ();
- }
- }
-
- fprintf (file, "}\n\n");
-}
-
-/* Display the Reduced Dependence Graph using dotty. */
-extern void dot_rdg (struct graph *);
-
-DEBUG_FUNCTION void
-dot_rdg (struct graph *rdg)
-{
- /* When debugging, enable the following code. This cannot be used
- in production compilers because it calls "system". */
-#if 0
- FILE *file = fopen ("/tmp/rdg.dot", "w");
- gcc_assert (file != NULL);
-
- dot_rdg_1 (file, rdg);
- fclose (file);
-
- system ("dotty /tmp/rdg.dot &");
-#else
- dot_rdg_1 (stderr, rdg);
-#endif
-}
-
-/* This structure is used for recording the mapping statement index in
- the RDG. */
-
-struct GTY(()) rdg_vertex_info
-{
- gimple stmt;
- int index;
-};
-
-/* Returns the index of STMT in RDG. */
-
-int
-rdg_vertex_for_stmt (struct graph *rdg, gimple stmt)
-{
- struct rdg_vertex_info rvi, *slot;
-
- rvi.stmt = stmt;
- slot = (struct rdg_vertex_info *) htab_find (rdg->indices, &rvi);
-
- if (!slot)
- return -1;
-
- return slot->index;
-}
-
-/* Creates an edge in RDG for each distance vector from DDR. The
- order that we keep track of in the RDG is the order in which
- statements have to be executed. */
-
-static void
-create_rdg_edge_for_ddr (struct graph *rdg, ddr_p ddr)
-{
- struct graph_edge *e;
- int va, vb;
- data_reference_p dra = DDR_A (ddr);
- data_reference_p drb = DDR_B (ddr);
- unsigned level = ddr_dependence_level (ddr);
-
- /* For non scalar dependences, when the dependence is REVERSED,
- statement B has to be executed before statement A. */
- if (level > 0
- && !DDR_REVERSED_P (ddr))
- {
- data_reference_p tmp = dra;
- dra = drb;
- drb = tmp;
- }
-
- va = rdg_vertex_for_stmt (rdg, DR_STMT (dra));
- vb = rdg_vertex_for_stmt (rdg, DR_STMT (drb));
-
- if (va < 0 || vb < 0)
- return;
-
- e = add_edge (rdg, va, vb);
- e->data = XNEW (struct rdg_edge);
-
- RDGE_LEVEL (e) = level;
- RDGE_RELATION (e) = ddr;
-
- /* Determines the type of the data dependence. */
- if (DR_IS_READ (dra) && DR_IS_READ (drb))
- RDGE_TYPE (e) = input_dd;
- else if (DR_IS_WRITE (dra) && DR_IS_WRITE (drb))
- RDGE_TYPE (e) = output_dd;
- else if (DR_IS_WRITE (dra) && DR_IS_READ (drb))
- RDGE_TYPE (e) = flow_dd;
- else if (DR_IS_READ (dra) && DR_IS_WRITE (drb))
- RDGE_TYPE (e) = anti_dd;
-}
-
-/* Creates dependence edges in RDG for all the uses of DEF. IDEF is
- the index of DEF in RDG. */
-
-static void
-create_rdg_edges_for_scalar (struct graph *rdg, tree def, int idef)
-{
- use_operand_p imm_use_p;
- imm_use_iterator iterator;
-
- FOR_EACH_IMM_USE_FAST (imm_use_p, iterator, def)
- {
- struct graph_edge *e;
- int use = rdg_vertex_for_stmt (rdg, USE_STMT (imm_use_p));
-
- if (use < 0)
- continue;
-
- e = add_edge (rdg, idef, use);
- e->data = XNEW (struct rdg_edge);
- RDGE_TYPE (e) = flow_dd;
- RDGE_RELATION (e) = NULL;
- }
-}
-
-/* Creates the edges of the reduced dependence graph RDG. */
-
-static void
-create_rdg_edges (struct graph *rdg, VEC (ddr_p, heap) *ddrs)
-{
- int i;
- struct data_dependence_relation *ddr;
- def_operand_p def_p;
- ssa_op_iter iter;
-
- FOR_EACH_VEC_ELT (ddr_p, ddrs, i, ddr)
- if (DDR_ARE_DEPENDENT (ddr) == NULL_TREE)
- create_rdg_edge_for_ddr (rdg, ddr);
-
- for (i = 0; i < rdg->n_vertices; i++)
- FOR_EACH_PHI_OR_STMT_DEF (def_p, RDG_STMT (rdg, i),
- iter, SSA_OP_DEF)
- create_rdg_edges_for_scalar (rdg, DEF_FROM_PTR (def_p), i);
-}
-
-/* Build the vertices of the reduced dependence graph RDG. */
-
-void
-create_rdg_vertices (struct graph *rdg, VEC (gimple, heap) *stmts)
-{
- int i, j;
- gimple stmt;
-
- FOR_EACH_VEC_ELT (gimple, stmts, i, stmt)
- {
- VEC (data_ref_loc, heap) *references;
- data_ref_loc *ref;
- struct vertex *v = &(rdg->vertices[i]);
- struct rdg_vertex_info *rvi = XNEW (struct rdg_vertex_info);
- struct rdg_vertex_info **slot;
-
- rvi->stmt = stmt;
- rvi->index = i;
- slot = (struct rdg_vertex_info **) htab_find_slot (rdg->indices, rvi, INSERT);
-
- if (!*slot)
- *slot = rvi;
- else
- free (rvi);
-
- v->data = XNEW (struct rdg_vertex);
- RDG_STMT (rdg, i) = stmt;
-
- RDG_MEM_WRITE_STMT (rdg, i) = false;
- RDG_MEM_READS_STMT (rdg, i) = false;
- if (gimple_code (stmt) == GIMPLE_PHI)
- continue;
-
- get_references_in_stmt (stmt, &references);
- FOR_EACH_VEC_ELT (data_ref_loc, references, j, ref)
- if (!ref->is_read)
- RDG_MEM_WRITE_STMT (rdg, i) = true;
- else
- RDG_MEM_READS_STMT (rdg, i) = true;
-
- VEC_free (data_ref_loc, heap, references);
- }
-}
-
-/* Initialize STMTS with all the statements of LOOP. When
- INCLUDE_PHIS is true, include also the PHI nodes. The order in
- which we discover statements is important as
- generate_loops_for_partition is using the same traversal for
- identifying statements. */
-
-static void
-stmts_from_loop (struct loop *loop, VEC (gimple, heap) **stmts)
-{
- unsigned int i;
- basic_block *bbs = get_loop_body_in_dom_order (loop);
-
- for (i = 0; i < loop->num_nodes; i++)
- {
- basic_block bb = bbs[i];
- gimple_stmt_iterator bsi;
- gimple stmt;
-
- for (bsi = gsi_start_phis (bb); !gsi_end_p (bsi); gsi_next (&bsi))
- VEC_safe_push (gimple, heap, *stmts, gsi_stmt (bsi));
-
- for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
- {
- stmt = gsi_stmt (bsi);
- if (gimple_code (stmt) != GIMPLE_LABEL && !is_gimple_debug (stmt))
- VEC_safe_push (gimple, heap, *stmts, stmt);
- }
- }
-
- free (bbs);
-}
-
-/* Returns true when all the dependences are computable. */
-
-static bool
-known_dependences_p (VEC (ddr_p, heap) *dependence_relations)
-{
- ddr_p ddr;
- unsigned int i;
-
- FOR_EACH_VEC_ELT (ddr_p, dependence_relations, i, ddr)
- if (DDR_ARE_DEPENDENT (ddr) == chrec_dont_know)
- return false;
-
- return true;
-}
-
-/* Computes a hash function for element ELT. */
-
-static hashval_t
-hash_stmt_vertex_info (const void *elt)
-{
- const struct rdg_vertex_info *const rvi =
- (const struct rdg_vertex_info *) elt;
- gimple stmt = rvi->stmt;
-
- return htab_hash_pointer (stmt);
-}
-
-/* Compares database elements E1 and E2. */
-
-static int
-eq_stmt_vertex_info (const void *e1, const void *e2)
-{
- const struct rdg_vertex_info *elt1 = (const struct rdg_vertex_info *) e1;
- const struct rdg_vertex_info *elt2 = (const struct rdg_vertex_info *) e2;
-
- return elt1->stmt == elt2->stmt;
-}
-
-/* Free the element E. */
-
-static void
-hash_stmt_vertex_del (void *e)
-{
- free (e);
-}
-
-/* Build the Reduced Dependence Graph (RDG) with one vertex per
- statement of the loop nest, and one edge per data dependence or
- scalar dependence. */
-
-struct graph *
-build_empty_rdg (int n_stmts)
-{
- int nb_data_refs = 10;
- struct graph *rdg = new_graph (n_stmts);
-
- rdg->indices = htab_create (nb_data_refs, hash_stmt_vertex_info,
- eq_stmt_vertex_info, hash_stmt_vertex_del);
- return rdg;
-}
-
-/* Build the Reduced Dependence Graph (RDG) with one vertex per
- statement of the loop nest, and one edge per data dependence or
- scalar dependence. */
-
-struct graph *
-build_rdg (struct loop *loop,
- VEC (loop_p, heap) **loop_nest,
- VEC (ddr_p, heap) **dependence_relations,
- VEC (data_reference_p, heap) **datarefs)
-{
- struct graph *rdg = NULL;
-
- if (compute_data_dependences_for_loop (loop, false, loop_nest, datarefs,
- dependence_relations)
- && known_dependences_p (*dependence_relations))
- {
- VEC (gimple, heap) *stmts = VEC_alloc (gimple, heap, 10);
- stmts_from_loop (loop, &stmts);
- rdg = build_empty_rdg (VEC_length (gimple, stmts));
- create_rdg_vertices (rdg, stmts);
- create_rdg_edges (rdg, *dependence_relations);
- VEC_free (gimple, heap, stmts);
- }
-
- return rdg;
-}
-
-/* Free the reduced dependence graph RDG. */
-
-void
-free_rdg (struct graph *rdg)
-{
- int i;
-
- for (i = 0; i < rdg->n_vertices; i++)
- {
- struct vertex *v = &(rdg->vertices[i]);
- struct graph_edge *e;
-
- for (e = v->succ; e; e = e->succ_next)
- free (e->data);
-
- free (v->data);
- }
-
- htab_delete (rdg->indices);
- free_graph (rdg);
-}
-
-/* Initialize STMTS with all the statements of LOOP that contain a
- store to memory. */
-
-void
-stores_from_loop (struct loop *loop, VEC (gimple, heap) **stmts)
-{
- unsigned int i;
- basic_block *bbs = get_loop_body_in_dom_order (loop);
-
- for (i = 0; i < loop->num_nodes; i++)
- {
- basic_block bb = bbs[i];
- gimple_stmt_iterator bsi;
-
- for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
- if (gimple_vdef (gsi_stmt (bsi)))
- VEC_safe_push (gimple, heap, *stmts, gsi_stmt (bsi));
- }
-
- free (bbs);
-}
-
-/* Returns true when the statement at STMT is of the form "A[i] = 0"
- that contains a data reference on its LHS with a stride of the same
- size as its unit type. */
-
-bool
-stmt_with_adjacent_zero_store_dr_p (gimple stmt)
-{
- tree lhs, rhs;
- bool res;
- struct data_reference *dr;
-
- if (!stmt
- || !gimple_vdef (stmt)
- || !gimple_assign_single_p (stmt))
- return false;
-
- lhs = gimple_assign_lhs (stmt);
- rhs = gimple_assign_rhs1 (stmt);
-
- /* If this is a bitfield store bail out. */
- if (TREE_CODE (lhs) == COMPONENT_REF
- && DECL_BIT_FIELD (TREE_OPERAND (lhs, 1)))
- return false;
-
- if (!(integer_zerop (rhs) || real_zerop (rhs)))
- return false;
-
- dr = XCNEW (struct data_reference);
-
- DR_STMT (dr) = stmt;
- DR_REF (dr) = lhs;
-
- res = dr_analyze_innermost (dr, loop_containing_stmt (stmt))
- && stride_of_unit_type_p (DR_STEP (dr), TREE_TYPE (lhs));
-
- free_data_ref (dr);
- return res;
-}
-
-/* Initialize STMTS with all the statements of LOOP that contain a
- store to memory of the form "A[i] = 0". */
-
-void
-stores_zero_from_loop (struct loop *loop, VEC (gimple, heap) **stmts)
-{
- unsigned int i;
- basic_block bb;
- gimple_stmt_iterator si;
- gimple stmt;
- basic_block *bbs = get_loop_body_in_dom_order (loop);
-
- for (i = 0; i < loop->num_nodes; i++)
- for (bb = bbs[i], si = gsi_start_bb (bb); !gsi_end_p (si); gsi_next (&si))
- if ((stmt = gsi_stmt (si))
- && stmt_with_adjacent_zero_store_dr_p (stmt))
- VEC_safe_push (gimple, heap, *stmts, gsi_stmt (si));
-
- free (bbs);
-}
-
-/* For a data reference REF, return the declaration of its base
- address or NULL_TREE if the base is not determined. */
-
-static inline tree
-ref_base_address (gimple stmt, data_ref_loc *ref)
-{
- tree base = NULL_TREE;
- tree base_address;
- struct data_reference *dr = XCNEW (struct data_reference);
-
- DR_STMT (dr) = stmt;
- DR_REF (dr) = *ref->pos;
- dr_analyze_innermost (dr, loop_containing_stmt (stmt));
- base_address = DR_BASE_ADDRESS (dr);
-
- if (!base_address)
- goto end;
-
- switch (TREE_CODE (base_address))
- {
- case ADDR_EXPR:
- base = TREE_OPERAND (base_address, 0);
- break;
-
- default:
- base = base_address;
- break;
- }
-
- end:
- free_data_ref (dr);
- return base;
-}
-
-/* Determines whether the statement from vertex V of the RDG has a
- definition used outside the loop that contains this statement. */
-
-bool
-rdg_defs_used_in_other_loops_p (struct graph *rdg, int v)
-{
- gimple stmt = RDG_STMT (rdg, v);
- struct loop *loop = loop_containing_stmt (stmt);
- use_operand_p imm_use_p;
- imm_use_iterator iterator;
- ssa_op_iter it;
- def_operand_p def_p;
-
- if (!loop)
- return true;
-
- FOR_EACH_PHI_OR_STMT_DEF (def_p, stmt, it, SSA_OP_DEF)
- {
- FOR_EACH_IMM_USE_FAST (imm_use_p, iterator, DEF_FROM_PTR (def_p))
- {
- if (loop_containing_stmt (USE_STMT (imm_use_p)) != loop)
- return true;
- }
- }
-
- return false;
-}
-
-/* Determines whether statements S1 and S2 access to similar memory
- locations. Two memory accesses are considered similar when they
- have the same base address declaration, i.e. when their
- ref_base_address is the same. */
-
-bool
-have_similar_memory_accesses (gimple s1, gimple s2)
-{
- bool res = false;
- unsigned i, j;
- VEC (data_ref_loc, heap) *refs1, *refs2;
- data_ref_loc *ref1, *ref2;
-
- get_references_in_stmt (s1, &refs1);
- get_references_in_stmt (s2, &refs2);
-
- FOR_EACH_VEC_ELT (data_ref_loc, refs1, i, ref1)
- {
- tree base1 = ref_base_address (s1, ref1);
-
- if (base1)
- FOR_EACH_VEC_ELT (data_ref_loc, refs2, j, ref2)
- if (base1 == ref_base_address (s2, ref2))
- {
- res = true;
- goto end;
- }
- }
-
- end:
- VEC_free (data_ref_loc, heap, refs1);
- VEC_free (data_ref_loc, heap, refs2);
- return res;
+ datarefs.release ();
}