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1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 | /* Graphite polyhedral representation.
Copyright (C) 2009-2015 Free Software Foundation, Inc.
Contributed by Sebastian Pop <sebastian.pop@amd.com> and
Tobias Grosser <grosser@fim.uni-passau.de>.
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 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_GRAPHITE_POLY_H
#define GCC_GRAPHITE_POLY_H
#ifndef HAVE_ISL_OPTIONS_SET_SCHEDULE_SERIALIZE_SCCS
# define isl_stat int
# define isl_stat_ok 0
#endif
typedef struct poly_dr *poly_dr_p;
typedef struct poly_bb *poly_bb_p;
typedef struct scop *scop_p;
typedef unsigned graphite_dim_t;
static inline graphite_dim_t pbb_dim_iter_domain (const struct poly_bb *);
static inline graphite_dim_t pbb_nb_params (const struct poly_bb *);
static inline graphite_dim_t scop_nb_params (scop_p);
/* A data reference can write or read some memory or we
just know it may write some memory. */
enum poly_dr_type
{
PDR_READ,
/* PDR_MAY_READs are represented using PDR_READS. This does not
limit the expressiveness. */
PDR_WRITE,
PDR_MAY_WRITE
};
struct poly_dr
{
/* An identifier for this PDR. */
int id;
/* The number of data refs identical to this one in the PBB. */
int nb_refs;
/* A pointer to compiler's data reference description. */
void *compiler_dr;
/* A pointer to the PBB that contains this data reference. */
poly_bb_p pbb;
enum poly_dr_type type;
/* The access polyhedron contains the polyhedral space this data
reference will access.
The polyhedron contains these dimensions:
- The alias set (a):
Every memory access is classified in at least one alias set.
- The subscripts (s_0, ..., s_n):
The memory is accessed using zero or more subscript dimensions.
- The iteration domain (variables and parameters)
Do not hardcode the dimensions. Use the following accessor functions:
- pdr_alias_set_dim
- pdr_subscript_dim
- pdr_iterator_dim
- pdr_parameter_dim
Example:
| int A[1335][123];
| int *p = malloc ();
|
| k = ...
| for i
| {
| if (unknown_function ())
| p = A;
| ... = p[?][?];
| for j
| A[i][j+k] = m;
| }
The data access A[i][j+k] in alias set "5" is described like this:
| i j k a s0 s1 1
| 0 0 0 1 0 0 -5 = 0
|-1 0 0 0 1 0 0 = 0
| 0 -1 -1 0 0 1 0 = 0
| 0 0 0 0 1 0 0 >= 0 # The last four lines describe the
| 0 0 0 0 0 1 0 >= 0 # array size.
| 0 0 0 0 -1 0 1335 >= 0
| 0 0 0 0 0 -1 123 >= 0
The pointer "*p" in alias set "5" and "7" is described as a union of
polyhedron:
| i k a s0 1
| 0 0 1 0 -5 = 0
| 0 0 0 1 0 >= 0
"or"
| i k a s0 1
| 0 0 1 0 -7 = 0
| 0 0 0 1 0 >= 0
"*p" accesses all of the object allocated with 'malloc'.
The scalar data access "m" is represented as an array with zero subscript
dimensions.
| i j k a 1
| 0 0 0 -1 15 = 0
The difference between the graphite internal format for access data and
the OpenSop format is in the order of columns.
Instead of having:
| i j k a s0 s1 1
| 0 0 0 1 0 0 -5 = 0
|-1 0 0 0 1 0 0 = 0
| 0 -1 -1 0 0 1 0 = 0
| 0 0 0 0 1 0 0 >= 0 # The last four lines describe the
| 0 0 0 0 0 1 0 >= 0 # array size.
| 0 0 0 0 -1 0 1335 >= 0
| 0 0 0 0 0 -1 123 >= 0
In OpenScop we have:
| a s0 s1 i j k 1
| 1 0 0 0 0 0 -5 = 0
| 0 1 0 -1 0 0 0 = 0
| 0 0 1 0 -1 -1 0 = 0
| 0 1 0 0 0 0 0 >= 0 # The last four lines describe the
| 0 0 1 0 0 0 0 >= 0 # array size.
| 0 -1 0 0 0 0 1335 >= 0
| 0 0 -1 0 0 0 123 >= 0
The OpenScop access function is printed as follows:
| 1 # The number of disjunct components in a union of access functions.
| R C O I L P # Described bellow.
| a s0 s1 i j k 1
| 1 0 0 0 0 0 -5 = 0
| 0 1 0 -1 0 0 0 = 0
| 0 0 1 0 -1 -1 0 = 0
| 0 1 0 0 0 0 0 >= 0 # The last four lines describe the
| 0 0 1 0 0 0 0 >= 0 # array size.
| 0 -1 0 0 0 0 1335 >= 0
| 0 0 -1 0 0 0 123 >= 0
Where:
- R: Number of rows.
- C: Number of columns.
- O: Number of output dimensions = alias set + number of subscripts.
- I: Number of input dimensions (iterators).
- L: Number of local (existentially quantified) dimensions.
- P: Number of parameters.
In the example, the vector "R C O I L P" is "7 7 3 2 0 1". */
isl_map *accesses;
isl_set *extent;
/* Data reference's base object set number, we must assure 2 pdrs are in the
same base object set before dependency checking. */
int dr_base_object_set;
/* The number of subscripts. */
graphite_dim_t nb_subscripts;
};
#define PDR_ID(PDR) (PDR->id)
#define PDR_NB_REFS(PDR) (PDR->nb_refs)
#define PDR_CDR(PDR) (PDR->compiler_dr)
#define PDR_PBB(PDR) (PDR->pbb)
#define PDR_TYPE(PDR) (PDR->type)
#define PDR_ACCESSES(PDR) (NULL)
#define PDR_BASE_OBJECT_SET(PDR) (PDR->dr_base_object_set)
#define PDR_NB_SUBSCRIPTS(PDR) (PDR->nb_subscripts)
void new_poly_dr (poly_bb_p, int, enum poly_dr_type, void *,
graphite_dim_t, isl_map *, isl_set *);
void free_poly_dr (poly_dr_p);
void debug_pdr (poly_dr_p, int);
void print_pdr (FILE *, poly_dr_p, int);
static inline scop_p pdr_scop (poly_dr_p pdr);
/* The dimension of the iteration domain of the scop of PDR. */
static inline graphite_dim_t
pdr_dim_iter_domain (poly_dr_p pdr)
{
return pbb_dim_iter_domain (PDR_PBB (pdr));
}
/* The number of parameters of the scop of PDR. */
static inline graphite_dim_t
pdr_nb_params (poly_dr_p pdr)
{
return scop_nb_params (pdr_scop (pdr));
}
/* The dimension of the alias set in PDR. */
static inline graphite_dim_t
pdr_alias_set_dim (poly_dr_p pdr)
{
poly_bb_p pbb = PDR_PBB (pdr);
return pbb_dim_iter_domain (pbb) + pbb_nb_params (pbb);
}
/* The dimension in PDR containing subscript S. */
static inline graphite_dim_t
pdr_subscript_dim (poly_dr_p pdr, graphite_dim_t s)
{
poly_bb_p pbb = PDR_PBB (pdr);
return pbb_dim_iter_domain (pbb) + pbb_nb_params (pbb) + 1 + s;
}
/* The dimension in PDR containing the loop iterator ITER. */
static inline graphite_dim_t
pdr_iterator_dim (poly_dr_p pdr ATTRIBUTE_UNUSED, graphite_dim_t iter)
{
return iter;
}
/* The dimension in PDR containing parameter PARAM. */
static inline graphite_dim_t
pdr_parameter_dim (poly_dr_p pdr, graphite_dim_t param)
{
poly_bb_p pbb = PDR_PBB (pdr);
return pbb_dim_iter_domain (pbb) + param;
}
/* Returns true when PDR is a "read". */
static inline bool
pdr_read_p (poly_dr_p pdr)
{
return PDR_TYPE (pdr) == PDR_READ;
}
/* Returns true when PDR is a "write". */
static inline bool
pdr_write_p (poly_dr_p pdr)
{
return PDR_TYPE (pdr) == PDR_WRITE;
}
/* Returns true when PDR is a "may write". */
static inline bool
pdr_may_write_p (poly_dr_p pdr)
{
return PDR_TYPE (pdr) == PDR_MAY_WRITE;
}
/* Return true when PDR1 and PDR2 are similar data accesses: they have
the same base array, and the same access functions. */
static inline bool
same_pdr_p (poly_dr_p pdr1, poly_dr_p pdr2)
{
return PDR_NB_SUBSCRIPTS (pdr1) == PDR_NB_SUBSCRIPTS (pdr2)
&& PDR_BASE_OBJECT_SET (pdr1) == PDR_BASE_OBJECT_SET (pdr2);
}
typedef struct poly_scattering *poly_scattering_p;
struct poly_scattering
{
/* The number of local variables. */
int nb_local_variables;
/* The number of scattering dimensions. */
int nb_scattering;
};
/* POLY_BB represents a blackbox in the polyhedral model. */
struct poly_bb
{
/* Pointer to a basic block or a statement in the compiler. */
void *black_box;
/* Pointer to the SCOP containing this PBB. */
scop_p scop;
/* The iteration domain of this bb. The layout of this polyhedron
is I|G with I the iteration domain, G the context parameters.
Example:
for (i = a - 7*b + 8; i <= 3*a + 13*b + 20; i++)
for (j = 2; j <= 2*i + 5; j++)
for (k = 0; k <= 5; k++)
S (i,j,k)
Loop iterators: i, j, k
Parameters: a, b
| i >= a - 7b + 8
| i <= 3a + 13b + 20
| j >= 2
| j <= 2i + 5
| k >= 0
| k <= 5
The number of variables in the DOMAIN may change and is not
related to the number of loops in the original code. */
isl_set *domain;
/* The data references we access. */
vec<poly_dr_p> drs;
/* The original scattering. */
poly_scattering_p _original;
isl_map *schedule;
/* The transformed scattering. */
poly_scattering_p _transformed;
isl_map *transformed;
/* A copy of the transformed scattering. */
poly_scattering_p _saved;
isl_map *saved;
/* For tiling, the map for computing the separating class. */
isl_map *map_sepclass;
/* True when this PBB contains only a reduction statement. */
bool is_reduction;
};
#define PBB_BLACK_BOX(PBB) ((gimple_bb_p) PBB->black_box)
#define PBB_SCOP(PBB) (PBB->scop)
#define PBB_DOMAIN(PBB) (NULL)
#define PBB_DRS(PBB) (PBB->drs)
#define PBB_ORIGINAL(PBB) (PBB->_original)
#define PBB_ORIGINAL_SCATTERING(PBB) (NULL)
#define PBB_TRANSFORMED(PBB) (PBB->_transformed)
#define PBB_TRANSFORMED_SCATTERING(PBB) (NULL)
#define PBB_SAVED(PBB) (PBB->_saved)
/* XXX isl if we ever need local vars in the scatter, we can't use the
out dimension of transformed to count the scatterting transform dimension.
*/
#define PBB_NB_LOCAL_VARIABLES(PBB) (0)
#define PBB_NB_SCATTERING_TRANSFORM(PBB) (isl_map_n_out (PBB->transformed))
#define PBB_IS_REDUCTION(PBB) (PBB->is_reduction)
extern poly_bb_p new_poly_bb (scop_p, void *);
extern void free_poly_bb (poly_bb_p);
extern void debug_loop_vec (poly_bb_p);
extern void schedule_to_scattering (poly_bb_p, int);
extern void print_pbb_domain (FILE *, poly_bb_p, int);
extern void print_pbb (FILE *, poly_bb_p, int);
extern void print_scop_context (FILE *, scop_p, int);
extern void print_scop (FILE *, scop_p, int);
extern void debug_pbb_domain (poly_bb_p, int);
extern void debug_pbb (poly_bb_p, int);
extern void print_pdrs (FILE *, poly_bb_p, int);
extern void debug_pdrs (poly_bb_p, int);
extern void debug_scop_context (scop_p, int);
extern void debug_scop (scop_p, int);
extern void print_scop_params (FILE *, scop_p, int);
extern void debug_scop_params (scop_p, int);
extern void print_iteration_domain (FILE *, poly_bb_p, int);
extern void print_iteration_domains (FILE *, scop_p, int);
extern void debug_iteration_domain (poly_bb_p, int);
extern void debug_iteration_domains (scop_p, int);
extern void print_isl_set (FILE *, isl_set *);
extern void print_isl_map (FILE *, isl_map *);
extern void print_isl_aff (FILE *, isl_aff *);
extern void print_isl_constraint (FILE *, isl_constraint *);
extern void debug_isl_set (isl_set *);
extern void debug_isl_map (isl_map *);
extern void debug_isl_aff (isl_aff *);
extern void debug_isl_constraint (isl_constraint *);
extern int scop_do_interchange (scop_p);
extern int scop_do_strip_mine (scop_p, int);
extern bool scop_do_block (scop_p);
extern bool flatten_all_loops (scop_p);
extern bool optimize_isl (scop_p);
extern void pbb_number_of_iterations_at_time (poly_bb_p, graphite_dim_t, mpz_t);
extern void debug_gmp_value (mpz_t);
/* Return the number of write data references in PBB. */
static inline int
number_of_write_pdrs (poly_bb_p pbb)
{
int res = 0;
int i;
poly_dr_p pdr;
for (i = 0; PBB_DRS (pbb).iterate (i, &pdr); i++)
if (PDR_TYPE (pdr) == PDR_WRITE)
res++;
return res;
}
/* Returns a gimple_bb from BB. */
static inline gimple_bb_p
gbb_from_bb (basic_block bb)
{
return (gimple_bb_p) bb->aux;
}
/* The poly_bb of the BB. */
static inline poly_bb_p
pbb_from_bb (basic_block bb)
{
return GBB_PBB (gbb_from_bb (bb));
}
/* The basic block of the PBB. */
static inline basic_block
pbb_bb (poly_bb_p pbb)
{
return GBB_BB (PBB_BLACK_BOX (pbb));
}
/* The index of the PBB. */
static inline int
pbb_index (poly_bb_p pbb)
{
return pbb_bb (pbb)->index;
}
/* The loop of the PBB. */
static inline loop_p
pbb_loop (poly_bb_p pbb)
{
return gbb_loop (PBB_BLACK_BOX (pbb));
}
/* The scop that contains the PDR. */
static inline scop_p
pdr_scop (poly_dr_p pdr)
{
return PBB_SCOP (PDR_PBB (pdr));
}
/* Set black box of PBB to BLACKBOX. */
static inline void
pbb_set_black_box (poly_bb_p pbb, void *black_box)
{
pbb->black_box = black_box;
}
/* The number of loops around PBB: the dimension of the iteration
domain. */
static inline graphite_dim_t
pbb_dim_iter_domain (const struct poly_bb *pbb)
{
return isl_set_dim (pbb->domain, isl_dim_set);
}
/* The number of params defined in PBB. */
static inline graphite_dim_t
pbb_nb_params (const struct poly_bb *pbb)
{
scop_p scop = PBB_SCOP (pbb);
return scop_nb_params (scop);
}
/* The number of scattering dimensions in the SCATTERING polyhedron
of a PBB for a given SCOP. */
static inline graphite_dim_t
pbb_nb_scattering_orig (const struct poly_bb *pbb)
{
return 2 * pbb_dim_iter_domain (pbb) + 1;
}
/* The number of scattering dimensions in PBB. */
static inline graphite_dim_t
pbb_nb_scattering_transform (const struct poly_bb *pbb)
{
return PBB_NB_SCATTERING_TRANSFORM (pbb);
}
/* The number of dynamic scattering dimensions in PBB. */
static inline graphite_dim_t
pbb_nb_dynamic_scattering_transform (const struct poly_bb *pbb)
{
/* This function requires the 2d + 1 scattering format to be
invariant during all transformations. */
gcc_assert (PBB_NB_SCATTERING_TRANSFORM (pbb) % 2);
return PBB_NB_SCATTERING_TRANSFORM (pbb) / 2;
}
/* Returns the number of local variables used in the transformed
scattering polyhedron of PBB. */
static inline graphite_dim_t
pbb_nb_local_vars (const struct poly_bb *pbb ATTRIBUTE_UNUSED)
{
/* For now we do not have any local variables, as we do not do strip
mining for example. */
return PBB_NB_LOCAL_VARIABLES (pbb);
}
/* The dimension in the domain of PBB containing the iterator ITER. */
static inline graphite_dim_t
pbb_iterator_dim (poly_bb_p pbb ATTRIBUTE_UNUSED, graphite_dim_t iter)
{
return iter;
}
/* The dimension in the domain of PBB containing the iterator ITER. */
static inline graphite_dim_t
pbb_parameter_dim (poly_bb_p pbb, graphite_dim_t param)
{
return param
+ pbb_dim_iter_domain (pbb);
}
/* The dimension in the original scattering polyhedron of PBB
containing the scattering iterator SCATTER. */
static inline graphite_dim_t
psco_scattering_dim (poly_bb_p pbb ATTRIBUTE_UNUSED, graphite_dim_t scatter)
{
gcc_assert (scatter < pbb_nb_scattering_orig (pbb));
return scatter;
}
/* The dimension in the transformed scattering polyhedron of PBB
containing the scattering iterator SCATTER. */
static inline graphite_dim_t
psct_scattering_dim (poly_bb_p pbb ATTRIBUTE_UNUSED, graphite_dim_t scatter)
{
gcc_assert (scatter <= pbb_nb_scattering_transform (pbb));
return scatter;
}
/* The dimension in the transformed scattering polyhedron of PBB of
the local variable LV. */
static inline graphite_dim_t
psct_local_var_dim (poly_bb_p pbb, graphite_dim_t lv)
{
gcc_assert (lv <= pbb_nb_local_vars (pbb));
return lv + pbb_nb_scattering_transform (pbb);
}
/* The dimension in the original scattering polyhedron of PBB
containing the loop iterator ITER. */
static inline graphite_dim_t
psco_iterator_dim (poly_bb_p pbb, graphite_dim_t iter)
{
gcc_assert (iter < pbb_dim_iter_domain (pbb));
return iter + pbb_nb_scattering_orig (pbb);
}
/* The dimension in the transformed scattering polyhedron of PBB
containing the loop iterator ITER. */
static inline graphite_dim_t
psct_iterator_dim (poly_bb_p pbb, graphite_dim_t iter)
{
gcc_assert (iter < pbb_dim_iter_domain (pbb));
return iter
+ pbb_nb_scattering_transform (pbb)
+ pbb_nb_local_vars (pbb);
}
/* The dimension in the original scattering polyhedron of PBB
containing parameter PARAM. */
static inline graphite_dim_t
psco_parameter_dim (poly_bb_p pbb, graphite_dim_t param)
{
gcc_assert (param < pbb_nb_params (pbb));
return param
+ pbb_nb_scattering_orig (pbb)
+ pbb_dim_iter_domain (pbb);
}
/* The dimension in the transformed scattering polyhedron of PBB
containing parameter PARAM. */
static inline graphite_dim_t
psct_parameter_dim (poly_bb_p pbb, graphite_dim_t param)
{
gcc_assert (param < pbb_nb_params (pbb));
return param
+ pbb_nb_scattering_transform (pbb)
+ pbb_nb_local_vars (pbb)
+ pbb_dim_iter_domain (pbb);
}
/* The scattering dimension of PBB corresponding to the dynamic level
LEVEL. */
static inline graphite_dim_t
psct_dynamic_dim (poly_bb_p pbb, graphite_dim_t level)
{
graphite_dim_t result = 1 + 2 * level;
gcc_assert (result < pbb_nb_scattering_transform (pbb));
return result;
}
/* The scattering dimension of PBB corresponding to the static
sequence of the loop level LEVEL. */
static inline graphite_dim_t
psct_static_dim (poly_bb_p pbb, graphite_dim_t level)
{
graphite_dim_t result = 2 * level;
gcc_assert (result < pbb_nb_scattering_transform (pbb));
return result;
}
/* Adds to the transformed scattering polyhedron of PBB a new local
variable and returns its index. */
static inline graphite_dim_t
psct_add_local_variable (poly_bb_p pbb ATTRIBUTE_UNUSED)
{
gcc_unreachable ();
return 0;
}
typedef struct lst *lst_p;
/* Loops and Statements Tree. */
struct lst {
/* LOOP_P is true when an LST node is a loop. */
bool loop_p;
/* A pointer to the loop that contains this node. */
lst_p loop_father;
/* The sum of all the memory strides for an LST loop. */
mpz_t memory_strides;
/* Loop nodes contain a sequence SEQ of LST nodes, statements
contain a pointer to their polyhedral representation PBB. */
union {
poly_bb_p pbb;
vec<lst_p> seq;
} node;
};
#define LST_LOOP_P(LST) ((LST)->loop_p)
#define LST_LOOP_FATHER(LST) ((LST)->loop_father)
#define LST_PBB(LST) ((LST)->node.pbb)
#define LST_SEQ(LST) ((LST)->node.seq)
#define LST_LOOP_MEMORY_STRIDES(LST) ((LST)->memory_strides)
void scop_to_lst (scop_p);
void print_lst (FILE *, lst_p, int);
void debug_lst (lst_p);
void dot_lst (lst_p);
/* Creates a new LST loop with SEQ. */
static inline lst_p
new_lst_loop (vec<lst_p> seq)
{
lst_p lst = XNEW (struct lst);
int i;
lst_p l;
LST_LOOP_P (lst) = true;
LST_SEQ (lst) = seq;
LST_LOOP_FATHER (lst) = NULL;
mpz_init (LST_LOOP_MEMORY_STRIDES (lst));
mpz_set_si (LST_LOOP_MEMORY_STRIDES (lst), -1);
for (i = 0; seq.iterate (i, &l); i++)
LST_LOOP_FATHER (l) = lst;
return lst;
}
/* Creates a new LST statement with PBB. */
static inline lst_p
new_lst_stmt (poly_bb_p pbb)
{
lst_p lst = XNEW (struct lst);
LST_LOOP_P (lst) = false;
LST_PBB (lst) = pbb;
LST_LOOP_FATHER (lst) = NULL;
return lst;
}
/* Frees the memory used by LST. */
static inline void
free_lst (lst_p lst)
{
if (!lst)
return;
if (LST_LOOP_P (lst))
{
int i;
lst_p l;
for (i = 0; LST_SEQ (lst).iterate (i, &l); i++)
free_lst (l);
mpz_clear (LST_LOOP_MEMORY_STRIDES (lst));
LST_SEQ (lst).release ();
}
free (lst);
}
/* Returns a copy of LST. */
static inline lst_p
copy_lst (lst_p lst)
{
if (!lst)
return NULL;
if (LST_LOOP_P (lst))
{
int i;
lst_p l;
vec<lst_p> seq;
seq.create (5);
for (i = 0; LST_SEQ (lst).iterate (i, &l); i++)
seq.safe_push (copy_lst (l));
return new_lst_loop (seq);
}
return new_lst_stmt (LST_PBB (lst));
}
/* Adds a new loop under the loop LST. */
static inline void
lst_add_loop_under_loop (lst_p lst)
{
vec<lst_p> seq;
seq.create (1);
lst_p l = new_lst_loop (LST_SEQ (lst));
gcc_assert (LST_LOOP_P (lst));
LST_LOOP_FATHER (l) = lst;
seq.quick_push (l);
LST_SEQ (lst) = seq;
}
/* Returns the loop depth of LST. */
static inline int
lst_depth (lst_p lst)
{
if (!lst)
return -2;
/* The depth of the outermost "fake" loop is -1. This outermost
loop does not have a loop father and it is just a container, as
in the loop representation of GCC. */
if (!LST_LOOP_FATHER (lst))
return -1;
return lst_depth (LST_LOOP_FATHER (lst)) + 1;
}
/* Returns the Dewey number for LST. */
static inline int
lst_dewey_number (lst_p lst)
{
int i;
lst_p l;
if (!lst)
return -1;
if (!LST_LOOP_FATHER (lst))
return 0;
FOR_EACH_VEC_ELT (LST_SEQ (LST_LOOP_FATHER (lst)), i, l)
if (l == lst)
return i;
return -1;
}
/* Returns the Dewey number of LST at depth DEPTH. */
static inline int
lst_dewey_number_at_depth (lst_p lst, int depth)
{
gcc_assert (lst && depth >= 0 && lst_depth (lst) <= depth);
if (lst_depth (lst) == depth)
return lst_dewey_number (lst);
return lst_dewey_number_at_depth (LST_LOOP_FATHER (lst), depth);
}
/* Returns the predecessor of LST in the sequence of its loop father.
Returns NULL if LST is the first statement in the sequence. */
static inline lst_p
lst_pred (lst_p lst)
{
int dewey;
lst_p father;
if (!lst || !LST_LOOP_FATHER (lst))
return NULL;
dewey = lst_dewey_number (lst);
if (dewey == 0)
return NULL;
father = LST_LOOP_FATHER (lst);
return LST_SEQ (father)[dewey - 1];
}
/* Returns the successor of LST in the sequence of its loop father.
Returns NULL if there is none. */
static inline lst_p
lst_succ (lst_p lst)
{
int dewey;
lst_p father;
if (!lst || !LST_LOOP_FATHER (lst))
return NULL;
dewey = lst_dewey_number (lst);
father = LST_LOOP_FATHER (lst);
if (LST_SEQ (father).length () == (unsigned) dewey + 1)
return NULL;
return LST_SEQ (father)[dewey + 1];
}
/* Return the LST node corresponding to PBB. */
static inline lst_p
lst_find_pbb (lst_p lst, poly_bb_p pbb)
{
int i;
lst_p l;
if (!lst)
return NULL;
if (!LST_LOOP_P (lst))
return (pbb == LST_PBB (lst)) ? lst : NULL;
for (i = 0; LST_SEQ (lst).iterate (i, &l); i++)
{
lst_p res = lst_find_pbb (l, pbb);
if (res)
return res;
}
return NULL;
}
/* Return the LST node corresponding to the loop around STMT at depth
LOOP_DEPTH. */
static inline lst_p
find_lst_loop (lst_p stmt, int loop_depth)
{
lst_p loop = LST_LOOP_FATHER (stmt);
gcc_assert (loop_depth >= 0);
while (loop_depth < lst_depth (loop))
loop = LST_LOOP_FATHER (loop);
return loop;
}
/* Return the first LST representing a PBB statement in LST. */
static inline lst_p
lst_find_first_pbb (lst_p lst)
{
int i;
lst_p l;
if (!lst)
return NULL;
if (!LST_LOOP_P (lst))
return lst;
for (i = 0; LST_SEQ (lst).iterate (i, &l); i++)
{
lst_p res = lst_find_first_pbb (l);
if (res)
return res;
}
return NULL;
}
/* Returns true when LST is a loop that does not contain
statements. */
static inline bool
lst_empty_p (lst_p lst)
{
return !lst_find_first_pbb (lst);
}
/* Return the last LST representing a PBB statement in LST. */
static inline lst_p
lst_find_last_pbb (lst_p lst)
{
int i;
lst_p l, res = NULL;
if (!lst)
return NULL;
if (!LST_LOOP_P (lst))
return lst;
for (i = 0; LST_SEQ (lst).iterate (i, &l); i++)
{
lst_p last = lst_find_last_pbb (l);
if (last)
res = last;
}
gcc_assert (res);
return res;
}
/* Returns true if LOOP contains LST, in other words, if LST is nested
in LOOP. */
static inline bool
lst_contains_p (lst_p loop, lst_p lst)
{
if (!loop || !lst || !LST_LOOP_P (loop))
return false;
if (loop == lst)
return true;
return lst_contains_p (loop, LST_LOOP_FATHER (lst));
}
/* Returns true if LOOP contains PBB, in other words, if PBB is nested
in LOOP. */
static inline bool
lst_contains_pbb (lst_p loop, poly_bb_p pbb)
{
return lst_find_pbb (loop, pbb) ? true : false;
}
/* Creates a loop nest of depth NB_LOOPS containing LST. */
static inline lst_p
lst_create_nest (int nb_loops, lst_p lst)
{
lst_p res, loop;
vec<lst_p> seq;
if (nb_loops == 0)
return lst;
seq.create (1);
loop = lst_create_nest (nb_loops - 1, lst);
seq.quick_push (loop);
res = new_lst_loop (seq);
LST_LOOP_FATHER (loop) = res;
return res;
}
/* Removes LST from the sequence of statements of its loop father. */
static inline void
lst_remove_from_sequence (lst_p lst)
{
lst_p father = LST_LOOP_FATHER (lst);
int dewey = lst_dewey_number (lst);
gcc_assert (lst && father && dewey >= 0);
LST_SEQ (father).ordered_remove (dewey);
LST_LOOP_FATHER (lst) = NULL;
}
/* Removes the loop LST and inline its body in the father loop. */
static inline void
lst_remove_loop_and_inline_stmts_in_loop_father (lst_p lst)
{
lst_p l, father = LST_LOOP_FATHER (lst);
int i, dewey = lst_dewey_number (lst);
gcc_assert (lst && father && dewey >= 0);
LST_SEQ (father).ordered_remove (dewey);
LST_LOOP_FATHER (lst) = NULL;
FOR_EACH_VEC_ELT (LST_SEQ (lst), i, l)
{
LST_SEQ (father).safe_insert (dewey + i, l);
LST_LOOP_FATHER (l) = father;
}
}
/* Sets NITER to the upper bound approximation of the number of
iterations of loop LST. */
static inline void
lst_niter_for_loop (lst_p lst, mpz_t niter)
{
int depth = lst_depth (lst);
poly_bb_p pbb = LST_PBB (lst_find_first_pbb (lst));
gcc_assert (LST_LOOP_P (lst));
pbb_number_of_iterations_at_time (pbb, psct_dynamic_dim (pbb, depth), niter);
}
/* Updates the scattering of PBB to be at the DEWEY number in the loop
at depth LEVEL. */
static inline void
pbb_update_scattering (poly_bb_p pbb, graphite_dim_t level, int dewey)
{
graphite_dim_t sched = psct_static_dim (pbb, level);
isl_space *d = isl_map_get_space (pbb->transformed);
isl_space *d1 = isl_space_range (d);
unsigned i, n = isl_space_dim (d1, isl_dim_out);
isl_space *d2 = isl_space_add_dims (d1, isl_dim_in, n);
isl_map *x = isl_map_universe (d2);
x = isl_map_fix_si (x, isl_dim_out, sched, dewey);
for (i = 0; i < n; i++)
if (i != sched)
x = isl_map_equate (x, isl_dim_in, i, isl_dim_out, i);
pbb->transformed = isl_map_apply_range (pbb->transformed, x);
}
/* Updates the scattering of all the PBBs under LST to be at the DEWEY
number in the loop at depth LEVEL. */
static inline void
lst_update_scattering_under (lst_p lst, int level, int dewey)
{
int i;
lst_p l;
gcc_assert (lst && level >= 0 && dewey >= 0);
if (LST_LOOP_P (lst))
for (i = 0; LST_SEQ (lst).iterate (i, &l); i++)
lst_update_scattering_under (l, level, dewey);
else
pbb_update_scattering (LST_PBB (lst), level, dewey);
}
/* Updates the all the scattering levels of all the PBBs under
LST. */
static inline void
lst_update_scattering (lst_p lst)
{
int i;
lst_p l;
if (!lst)
return;
if (LST_LOOP_FATHER (lst))
{
lst_p father = LST_LOOP_FATHER (lst);
int dewey = lst_dewey_number (lst);
int level = lst_depth (lst);
gcc_assert (lst && father && dewey >= 0 && level >= 0);
for (i = dewey; LST_SEQ (father).iterate (i, &l); i++)
lst_update_scattering_under (l, level, i);
}
if (LST_LOOP_P (lst))
for (i = 0; LST_SEQ (lst).iterate (i, &l); i++)
lst_update_scattering (l);
}
/* Inserts LST1 before LST2 if BEFORE is true; inserts LST1 after LST2
if BEFORE is false. */
static inline void
lst_insert_in_sequence (lst_p lst1, lst_p lst2, bool before)
{
lst_p father;
int dewey;
/* Do not insert empty loops. */
if (!lst1 || lst_empty_p (lst1))
return;
father = LST_LOOP_FATHER (lst2);
dewey = lst_dewey_number (lst2);
gcc_assert (lst2 && father && dewey >= 0);
LST_SEQ (father).safe_insert (before ? dewey : dewey + 1, lst1);
LST_LOOP_FATHER (lst1) = father;
}
/* Replaces LST1 with LST2. */
static inline void
lst_replace (lst_p lst1, lst_p lst2)
{
lst_p father;
int dewey;
if (!lst2 || lst_empty_p (lst2))
return;
father = LST_LOOP_FATHER (lst1);
dewey = lst_dewey_number (lst1);
LST_LOOP_FATHER (lst2) = father;
LST_SEQ (father)[dewey] = lst2;
}
/* Returns a copy of ROOT where LST has been replaced by a copy of the
LSTs A B C in this sequence. */
static inline lst_p
lst_substitute_3 (lst_p root, lst_p lst, lst_p a, lst_p b, lst_p c)
{
int i;
lst_p l;
vec<lst_p> seq;
if (!root)
return NULL;
gcc_assert (lst && root != lst);
if (!LST_LOOP_P (root))
return new_lst_stmt (LST_PBB (root));
seq.create (5);
for (i = 0; LST_SEQ (root).iterate (i, &l); i++)
if (l != lst)
seq.safe_push (lst_substitute_3 (l, lst, a, b, c));
else
{
if (!lst_empty_p (a))
seq.safe_push (copy_lst (a));
if (!lst_empty_p (b))
seq.safe_push (copy_lst (b));
if (!lst_empty_p (c))
seq.safe_push (copy_lst (c));
}
return new_lst_loop (seq);
}
/* Moves LST before LOOP if BEFORE is true, and after the LOOP if
BEFORE is false. */
static inline void
lst_distribute_lst (lst_p loop, lst_p lst, bool before)
{
int loop_depth = lst_depth (loop);
int depth = lst_depth (lst);
int nb_loops = depth - loop_depth;
gcc_assert (lst && loop && LST_LOOP_P (loop) && nb_loops > 0);
lst_remove_from_sequence (lst);
lst_insert_in_sequence (lst_create_nest (nb_loops, lst), loop, before);
}
/* Removes from LOOP all the statements before/after and including PBB
if BEFORE is true/false. Returns the negation of BEFORE when the
statement PBB has been found. */
static inline bool
lst_remove_all_before_including_pbb (lst_p loop, poly_bb_p pbb, bool before)
{
int i;
lst_p l;
if (!loop || !LST_LOOP_P (loop))
return before;
for (i = 0; LST_SEQ (loop).iterate (i, &l);)
if (LST_LOOP_P (l))
{
before = lst_remove_all_before_including_pbb (l, pbb, before);
if (LST_SEQ (l).length () == 0)
{
LST_SEQ (loop).ordered_remove (i);
free_lst (l);
}
else
i++;
}
else
{
if (before)
{
if (LST_PBB (l) == pbb)
before = false;
LST_SEQ (loop).ordered_remove (i);
free_lst (l);
}
else if (LST_PBB (l) == pbb)
{
before = true;
LST_SEQ (loop).ordered_remove (i);
free_lst (l);
}
else
i++;
}
return before;
}
/* Removes from LOOP all the statements before/after and excluding PBB
if BEFORE is true/false; Returns the negation of BEFORE when the
statement PBB has been found. */
static inline bool
lst_remove_all_before_excluding_pbb (lst_p loop, poly_bb_p pbb, bool before)
{
int i;
lst_p l;
if (!loop || !LST_LOOP_P (loop))
return before;
for (i = 0; LST_SEQ (loop).iterate (i, &l);)
if (LST_LOOP_P (l))
{
before = lst_remove_all_before_excluding_pbb (l, pbb, before);
if (LST_SEQ (l).length () == 0)
{
LST_SEQ (loop).ordered_remove (i);
free_lst (l);
continue;
}
i++;
}
else
{
if (before && LST_PBB (l) != pbb)
{
LST_SEQ (loop).ordered_remove (i);
free_lst (l);
continue;
}
i++;
if (LST_PBB (l) == pbb)
before = before ? false : true;
}
return before;
}
/* A SCOP is a Static Control Part of the program, simple enough to be
represented in polyhedral form. */
struct scop
{
/* A SCOP is defined as a SESE region. */
void *region;
/* Number of parameters in SCoP. */
graphite_dim_t nb_params;
/* All the basic blocks in this scop that contain memory references
and that will be represented as statements in the polyhedral
representation. */
vec<poly_bb_p> bbs;
/* Original, transformed and saved schedules. */
lst_p original_schedule, transformed_schedule, saved_schedule;
/* The context describes known restrictions concerning the parameters
and relations in between the parameters.
void f (int8_t a, uint_16_t b) {
c = 2 a + b;
...
}
Here we can add these restrictions to the context:
-128 >= a >= 127
0 >= b >= 65,535
c = 2a + b */
isl_set *context;
/* The context used internally by ISL. */
isl_ctx *ctx;
/* The original dependence relations:
RAW are read after write dependences,
WAR are write after read dependences,
WAW are write after write dependences. */
isl_union_map *must_raw, *may_raw, *must_raw_no_source, *may_raw_no_source,
*must_war, *may_war, *must_war_no_source, *may_war_no_source,
*must_waw, *may_waw, *must_waw_no_source, *may_waw_no_source;
/* True when the scop has been converted to its polyhedral
representation. */
bool poly_scop_p;
};
#define SCOP_BBS(S) (S->bbs)
#define SCOP_REGION(S) ((sese) S->region)
#define SCOP_CONTEXT(S) (NULL)
#define SCOP_ORIGINAL_SCHEDULE(S) (S->original_schedule)
#define SCOP_TRANSFORMED_SCHEDULE(S) (S->transformed_schedule)
#define SCOP_SAVED_SCHEDULE(S) (S->saved_schedule)
#define POLY_SCOP_P(S) (S->poly_scop_p)
extern scop_p new_scop (void *);
extern void free_scop (scop_p);
extern void free_scops (vec<scop_p> );
extern void print_generated_program (FILE *, scop_p);
extern void debug_generated_program (scop_p);
extern void print_scattering_function (FILE *, poly_bb_p, int);
extern void print_scattering_functions (FILE *, scop_p, int);
extern void debug_scattering_function (poly_bb_p, int);
extern void debug_scattering_functions (scop_p, int);
extern int scop_max_loop_depth (scop_p);
extern int unify_scattering_dimensions (scop_p);
extern bool apply_poly_transforms (scop_p);
extern bool graphite_legal_transform (scop_p);
/* Set the region of SCOP to REGION. */
static inline void
scop_set_region (scop_p scop, void *region)
{
scop->region = region;
}
/* Returns the number of parameters for SCOP. */
static inline graphite_dim_t
scop_nb_params (scop_p scop)
{
return scop->nb_params;
}
/* Set the number of params of SCOP to NB_PARAMS. */
static inline void
scop_set_nb_params (scop_p scop, graphite_dim_t nb_params)
{
scop->nb_params = nb_params;
}
/* Allocates a new empty poly_scattering structure. */
static inline poly_scattering_p
poly_scattering_new (void)
{
poly_scattering_p res = XNEW (struct poly_scattering);
res->nb_local_variables = 0;
res->nb_scattering = 0;
return res;
}
/* Free a poly_scattering structure. */
static inline void
poly_scattering_free (poly_scattering_p s)
{
free (s);
}
/* Copies S and return a new scattering. */
static inline poly_scattering_p
poly_scattering_copy (poly_scattering_p s)
{
poly_scattering_p res = poly_scattering_new ();
res->nb_local_variables = s->nb_local_variables;
res->nb_scattering = s->nb_scattering;
return res;
}
/* Saves the transformed scattering of PBB. */
static inline void
store_scattering_pbb (poly_bb_p pbb)
{
isl_map_free (pbb->saved);
pbb->saved = isl_map_copy (pbb->transformed);
}
/* Stores the SCOP_TRANSFORMED_SCHEDULE to SCOP_SAVED_SCHEDULE. */
static inline void
store_lst_schedule (scop_p scop)
{
if (SCOP_SAVED_SCHEDULE (scop))
free_lst (SCOP_SAVED_SCHEDULE (scop));
SCOP_SAVED_SCHEDULE (scop) = copy_lst (SCOP_TRANSFORMED_SCHEDULE (scop));
}
/* Restores the SCOP_TRANSFORMED_SCHEDULE from SCOP_SAVED_SCHEDULE. */
static inline void
restore_lst_schedule (scop_p scop)
{
if (SCOP_TRANSFORMED_SCHEDULE (scop))
free_lst (SCOP_TRANSFORMED_SCHEDULE (scop));
SCOP_TRANSFORMED_SCHEDULE (scop) = copy_lst (SCOP_SAVED_SCHEDULE (scop));
}
/* Saves the scattering for all the pbbs in the SCOP. */
static inline void
store_scattering (scop_p scop)
{
int i;
poly_bb_p pbb;
for (i = 0; SCOP_BBS (scop).iterate (i, &pbb); i++)
store_scattering_pbb (pbb);
store_lst_schedule (scop);
}
/* Restores the scattering of PBB. */
static inline void
restore_scattering_pbb (poly_bb_p pbb)
{
gcc_assert (pbb->saved);
isl_map_free (pbb->transformed);
pbb->transformed = isl_map_copy (pbb->saved);
}
/* Restores the scattering for all the pbbs in the SCOP. */
static inline void
restore_scattering (scop_p scop)
{
int i;
poly_bb_p pbb;
for (i = 0; SCOP_BBS (scop).iterate (i, &pbb); i++)
restore_scattering_pbb (pbb);
restore_lst_schedule (scop);
}
bool graphite_legal_transform (scop_p);
isl_map *reverse_loop_at_level (poly_bb_p, int);
isl_union_map *reverse_loop_for_pbbs (scop_p, vec<poly_bb_p> , int);
__isl_give isl_union_map *extend_schedule (__isl_take isl_union_map *);
void
compute_deps (scop_p scop, vec<poly_bb_p> pbbs,
isl_union_map **must_raw,
isl_union_map **may_raw,
isl_union_map **must_raw_no_source,
isl_union_map **may_raw_no_source,
isl_union_map **must_war,
isl_union_map **may_war,
isl_union_map **must_war_no_source,
isl_union_map **may_war_no_source,
isl_union_map **must_waw,
isl_union_map **may_waw,
isl_union_map **must_waw_no_source,
isl_union_map **may_waw_no_source);
isl_union_map *
scop_get_dependences (scop_p scop);
bool
carries_deps (__isl_keep isl_union_map *schedule,
__isl_keep isl_union_map *deps,
int depth);
#endif
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