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/* Lowering pass for OMP directives. Converts OMP directives into explicit
calls to the runtime library (libgomp), data marshalling to implement data
sharing and copying clauses, offloading to accelerators, and more.
Contributed by Diego Novillo <dnovillo@redhat.com>
Copyright (C) 2005-2021 Free Software Foundation, Inc.
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/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "target.h"
#include "tree.h"
#include "gimple.h"
#include "tree-pass.h"
#include "ssa.h"
#include "cgraph.h"
#include "pretty-print.h"
#include "diagnostic-core.h"
#include "fold-const.h"
#include "stor-layout.h"
#include "internal-fn.h"
#include "gimple-fold.h"
#include "gimplify.h"
#include "gimple-iterator.h"
#include "gimplify-me.h"
#include "gimple-walk.h"
#include "tree-iterator.h"
#include "tree-inline.h"
#include "langhooks.h"
#include "tree-dfa.h"
#include "tree-ssa.h"
#include "splay-tree.h"
#include "omp-general.h"
#include "omp-low.h"
#include "gimple-low.h"
#include "alloc-pool.h"
#include "symbol-summary.h"
#include "tree-nested.h"
#include "context.h"
#include "gomp-constants.h"
#include "gimple-pretty-print.h"
#include "stringpool.h"
#include "attribs.h"
#include "omp-offload.h"
/* Lowering of OMP parallel and workshare constructs proceeds in two
phases. The first phase scans the function looking for OMP statements
and then for variables that must be replaced to satisfy data sharing
clauses. The second phase expands code for the constructs, as well as
re-gimplifying things when variables have been replaced with complex
expressions.
Final code generation is done by pass_expand_omp. The flowgraph is
scanned for regions which are then moved to a new
function, to be invoked by the thread library, or offloaded. */
/* Context structure. Used to store information about each parallel
directive in the code. */
struct omp_context
{
/* This field must be at the beginning, as we do "inheritance": Some
callback functions for tree-inline.c (e.g., omp_copy_decl)
receive a copy_body_data pointer that is up-casted to an
omp_context pointer. */
copy_body_data cb;
/* The tree of contexts corresponding to the encountered constructs. */
struct omp_context *outer;
gimple *stmt;
/* Map variables to fields in a structure that allows communication
between sending and receiving threads. */
splay_tree field_map;
tree record_type;
tree sender_decl;
tree receiver_decl;
/* These are used just by task contexts, if task firstprivate fn is
needed. srecord_type is used to communicate from the thread
that encountered the task construct to task firstprivate fn,
record_type is allocated by GOMP_task, initialized by task firstprivate
fn and passed to the task body fn. */
splay_tree sfield_map;
tree srecord_type;
/* A chain of variables to add to the top-level block surrounding the
construct. In the case of a parallel, this is in the child function. */
tree block_vars;
/* Label to which GOMP_cancel{,llation_point} and explicit and implicit
barriers should jump to during omplower pass. */
tree cancel_label;
/* The sibling GIMPLE_OMP_FOR simd with _simt_ clause or NULL
otherwise. */
gimple *simt_stmt;
/* For task reductions registered in this context, a vector containing
the length of the private copies block (if constant, otherwise NULL)
and then offsets (if constant, otherwise NULL) for each entry. */
vec<tree> task_reductions;
/* A hash map from the reduction clauses to the registered array
elts. */
hash_map<tree, unsigned> *task_reduction_map;
/* And a hash map from the lastprivate(conditional:) variables to their
corresponding tracking loop iteration variables. */
hash_map<tree, tree> *lastprivate_conditional_map;
/* And a hash map from the allocate variables to their corresponding
allocators. */
hash_map<tree, tree> *allocate_map;
/* A tree_list of the reduction clauses in this context. This is
only used for checking the consistency of OpenACC reduction
clauses in scan_omp_for and is not guaranteed to contain a valid
value outside of this function. */
tree local_reduction_clauses;
/* A tree_list of the reduction clauses in outer contexts. This is
only used for checking the consistency of OpenACC reduction
clauses in scan_omp_for and is not guaranteed to contain a valid
value outside of this function. */
tree outer_reduction_clauses;
/* Nesting depth of this context. Used to beautify error messages re
invalid gotos. The outermost ctx is depth 1, with depth 0 being
reserved for the main body of the function. */
int depth;
/* True if this parallel directive is nested within another. */
bool is_nested;
/* True if this construct can be cancelled. */
bool cancellable;
/* True if lower_omp_1 should look up lastprivate conditional in parent
context. */
bool combined_into_simd_safelen1;
/* True if there is nested scan context with inclusive clause. */
bool scan_inclusive;
/* True if there is nested scan context with exclusive clause. */
bool scan_exclusive;
/* True in the second simd loop of for simd with inscan reductions. */
bool for_simd_scan_phase;
/* True if there is order(concurrent) clause on the construct. */
bool order_concurrent;
/* True if there is bind clause on the construct (i.e. a loop construct). */
bool loop_p;
/* Only used for omp target contexts. True if a teams construct is
strictly nested in it. */
bool teams_nested_p;
/* Only used for omp target contexts. True if an OpenMP construct other
than teams is strictly nested in it. */
bool nonteams_nested_p;
/* Candidates for adjusting OpenACC privatization level. */
vec<tree> oacc_privatization_candidates;
};
static splay_tree all_contexts;
static int taskreg_nesting_level;
static int target_nesting_level;
static bitmap task_shared_vars;
static bitmap global_nonaddressable_vars;
static vec<omp_context *> taskreg_contexts;
static void scan_omp (gimple_seq *, omp_context *);
static tree scan_omp_1_op (tree *, int *, void *);
#define WALK_SUBSTMTS \
case GIMPLE_BIND: \
case GIMPLE_TRY: \
case GIMPLE_CATCH: \
case GIMPLE_EH_FILTER: \
case GIMPLE_TRANSACTION: \
/* The sub-statements for these should be walked. */ \
*handled_ops_p = false; \
break;
/* Return whether CTX represents an OpenACC 'parallel' or 'serial' construct.
(This doesn't include OpenACC 'kernels' decomposed parts.) */
static bool
is_oacc_parallel_or_serial (omp_context *ctx)
{
enum gimple_code outer_type = gimple_code (ctx->stmt);
return ((outer_type == GIMPLE_OMP_TARGET)
&& ((gimple_omp_target_kind (ctx->stmt)
== GF_OMP_TARGET_KIND_OACC_PARALLEL)
|| (gimple_omp_target_kind (ctx->stmt)
== GF_OMP_TARGET_KIND_OACC_SERIAL)));
}
/* Return whether CTX represents an OpenACC 'kernels' construct.
(This doesn't include OpenACC 'kernels' decomposed parts.) */
static bool
is_oacc_kernels (omp_context *ctx)
{
enum gimple_code outer_type = gimple_code (ctx->stmt);
return ((outer_type == GIMPLE_OMP_TARGET)
&& (gimple_omp_target_kind (ctx->stmt)
== GF_OMP_TARGET_KIND_OACC_KERNELS));
}
/* Return whether CTX represents an OpenACC 'kernels' decomposed part. */
static bool
is_oacc_kernels_decomposed_part (omp_context *ctx)
{
enum gimple_code outer_type = gimple_code (ctx->stmt);
return ((outer_type == GIMPLE_OMP_TARGET)
&& ((gimple_omp_target_kind (ctx->stmt)
== GF_OMP_TARGET_KIND_OACC_PARALLEL_KERNELS_PARALLELIZED)
|| (gimple_omp_target_kind (ctx->stmt)
== GF_OMP_TARGET_KIND_OACC_PARALLEL_KERNELS_GANG_SINGLE)
|| (gimple_omp_target_kind (ctx->stmt)
== GF_OMP_TARGET_KIND_OACC_DATA_KERNELS)));
}
/* Return true if STMT corresponds to an OpenMP target region. */
static bool
is_omp_target (gimple *stmt)
{
if (gimple_code (stmt) == GIMPLE_OMP_TARGET)
{
int kind = gimple_omp_target_kind (stmt);
return (kind == GF_OMP_TARGET_KIND_REGION
|| kind == GF_OMP_TARGET_KIND_DATA
|| kind == GF_OMP_TARGET_KIND_ENTER_DATA
|| kind == GF_OMP_TARGET_KIND_EXIT_DATA);
}
return false;
}
/* If DECL is the artificial dummy VAR_DECL created for non-static
data member privatization, return the underlying "this" parameter,
otherwise return NULL. */
tree
omp_member_access_dummy_var (tree decl)
{
if (!VAR_P (decl)
|| !DECL_ARTIFICIAL (decl)
|| !DECL_IGNORED_P (decl)
|| !DECL_HAS_VALUE_EXPR_P (decl)
|| !lang_hooks.decls.omp_disregard_value_expr (decl, false))
return NULL_TREE;
tree v = DECL_VALUE_EXPR (decl);
if (TREE_CODE (v) != COMPONENT_REF)
return NULL_TREE;
while (1)
switch (TREE_CODE (v))
{
case COMPONENT_REF:
case MEM_REF:
case INDIRECT_REF:
CASE_CONVERT:
case POINTER_PLUS_EXPR:
v = TREE_OPERAND (v, 0);
continue;
case PARM_DECL:
if (DECL_CONTEXT (v) == current_function_decl
&& DECL_ARTIFICIAL (v)
&& TREE_CODE (TREE_TYPE (v)) == POINTER_TYPE)
return v;
return NULL_TREE;
default:
return NULL_TREE;
}
}
/* Helper for unshare_and_remap, called through walk_tree. */
static tree
unshare_and_remap_1 (tree *tp, int *walk_subtrees, void *data)
{
tree *pair = (tree *) data;
if (*tp == pair[0])
{
*tp = unshare_expr (pair[1]);
*walk_subtrees = 0;
}
else if (IS_TYPE_OR_DECL_P (*tp))
*walk_subtrees = 0;
return NULL_TREE;
}
/* Return unshare_expr (X) with all occurrences of FROM
replaced with TO. */
static tree
unshare_and_remap (tree x, tree from, tree to)
{
tree pair[2] = { from, to };
x = unshare_expr (x);
walk_tree (&x, unshare_and_remap_1, pair, NULL);
return x;
}
/* Convenience function for calling scan_omp_1_op on tree operands. */
static inline tree
scan_omp_op (tree *tp, omp_context *ctx)
{
struct walk_stmt_info wi;
memset (&wi, 0, sizeof (wi));
wi.info = ctx;
wi.want_locations = true;
return walk_tree (tp, scan_omp_1_op, &wi, NULL);
}
static void lower_omp (gimple_seq *, omp_context *);
static tree lookup_decl_in_outer_ctx (tree, omp_context *);
static tree maybe_lookup_decl_in_outer_ctx (tree, omp_context *);
/* Return true if CTX is for an omp parallel. */
static inline bool
is_parallel_ctx (omp_context *ctx)
{
return gimple_code (ctx->stmt) == GIMPLE_OMP_PARALLEL;
}
/* Return true if CTX is for an omp task. */
static inline bool
is_task_ctx (omp_context *ctx)
{
return gimple_code (ctx->stmt) == GIMPLE_OMP_TASK;
}
/* Return true if CTX is for an omp taskloop. */
static inline bool
is_taskloop_ctx (omp_context *ctx)
{
return gimple_code (ctx->stmt) == GIMPLE_OMP_FOR
&& gimple_omp_for_kind (ctx->stmt) == GF_OMP_FOR_KIND_TASKLOOP;
}
/* Return true if CTX is for a host omp teams. */
static inline bool
is_host_teams_ctx (omp_context *ctx)
{
return gimple_code (ctx->stmt) == GIMPLE_OMP_TEAMS
&& gimple_omp_teams_host (as_a <gomp_teams *> (ctx->stmt));
}
/* Return true if CTX is for an omp parallel or omp task or host omp teams
(the last one is strictly not a task region in OpenMP speak, but we
need to treat it similarly). */
static inline bool
is_taskreg_ctx (omp_context *ctx)
{
return is_parallel_ctx (ctx) || is_task_ctx (ctx) || is_host_teams_ctx (ctx);
}
/* Return true if EXPR is variable sized. */
static inline bool
is_variable_sized (const_tree expr)
{
return !TREE_CONSTANT (TYPE_SIZE_UNIT (TREE_TYPE (expr)));
}
/* Lookup variables. The "maybe" form
allows for the variable form to not have been entered, otherwise we
assert that the variable must have been entered. */
static inline tree
lookup_decl (tree var, omp_context *ctx)
{
tree *n = ctx->cb.decl_map->get (var);
return *n;
}
static inline tree
maybe_lookup_decl (const_tree var, omp_context *ctx)
{
tree *n = ctx->cb.decl_map->get (const_cast<tree> (var));
return n ? *n : NULL_TREE;
}
static inline tree
lookup_field (tree var, omp_context *ctx)
{
splay_tree_node n;
n = splay_tree_lookup (ctx->field_map, (splay_tree_key) var);
return (tree) n->value;
}
static inline tree
lookup_sfield (splay_tree_key key, omp_context *ctx)
{
splay_tree_node n;
n = splay_tree_lookup (ctx->sfield_map
? ctx->sfield_map : ctx->field_map, key);
return (tree) n->value;
}
static inline tree
lookup_sfield (tree var, omp_context *ctx)
{
return lookup_sfield ((splay_tree_key) var, ctx);
}
static inline tree
maybe_lookup_field (splay_tree_key key, omp_context *ctx)
{
splay_tree_node n;
n = splay_tree_lookup (ctx->field_map, key);
return n ? (tree) n->value : NULL_TREE;
}
static inline tree
maybe_lookup_field (tree var, omp_context *ctx)
{
return maybe_lookup_field ((splay_tree_key) var, ctx);
}
/* Return true if DECL should be copied by pointer. SHARED_CTX is
the parallel context if DECL is to be shared. */
static bool
use_pointer_for_field (tree decl, omp_context *shared_ctx)
{
if (AGGREGATE_TYPE_P (TREE_TYPE (decl))
|| TYPE_ATOMIC (TREE_TYPE (decl)))
return true;
/* We can only use copy-in/copy-out semantics for shared variables
when we know the value is not accessible from an outer scope. */
if (shared_ctx)
{
gcc_assert (!is_gimple_omp_oacc (shared_ctx->stmt));
/* ??? Trivially accessible from anywhere. But why would we even
be passing an address in this case? Should we simply assert
this to be false, or should we have a cleanup pass that removes
these from the list of mappings? */
if (is_global_var (maybe_lookup_decl_in_outer_ctx (decl, shared_ctx)))
return true;
/* For variables with DECL_HAS_VALUE_EXPR_P set, we cannot tell
without analyzing the expression whether or not its location
is accessible to anyone else. In the case of nested parallel
regions it certainly may be. */
if (TREE_CODE (decl) != RESULT_DECL && DECL_HAS_VALUE_EXPR_P (decl))
return true;
/* Do not use copy-in/copy-out for variables that have their
address taken. */
if (is_global_var (decl))
{
/* For file scope vars, track whether we've seen them as
non-addressable initially and in that case, keep the same
answer for the duration of the pass, even when they are made
addressable later on e.g. through reduction expansion. Global
variables which weren't addressable before the pass will not
have their privatized copies address taken. See PR91216. */
if (!TREE_ADDRESSABLE (decl))
{
if (!global_nonaddressable_vars)
global_nonaddressable_vars = BITMAP_ALLOC (NULL);
bitmap_set_bit (global_nonaddressable_vars, DECL_UID (decl));
}
else if (!global_nonaddressable_vars
|| !bitmap_bit_p (global_nonaddressable_vars,
DECL_UID (decl)))
return true;
}
else if (TREE_ADDRESSABLE (decl))
return true;
/* lower_send_shared_vars only uses copy-in, but not copy-out
for these. */
if (TREE_READONLY (decl)
|| ((TREE_CODE (decl) == RESULT_DECL
|| TREE_CODE (decl) == PARM_DECL)
&& DECL_BY_REFERENCE (decl)))
return false;
/* Disallow copy-in/out in nested parallel if
decl is shared in outer parallel, otherwise
each thread could store the shared variable
in its own copy-in location, making the
variable no longer really shared. */
if (shared_ctx->is_nested)
{
omp_context *up;
for (up = shared_ctx->outer; up; up = up->outer)
if ((is_taskreg_ctx (up)
|| (gimple_code (up->stmt) == GIMPLE_OMP_TARGET
&& is_gimple_omp_offloaded (up->stmt)))
&& maybe_lookup_decl (decl, up))
break;
if (up)
{
tree c;
if (gimple_code (up->stmt) == GIMPLE_OMP_TARGET)
{
for (c = gimple_omp_target_clauses (up->stmt);
c; c = OMP_CLAUSE_CHAIN (c))
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP
&& OMP_CLAUSE_DECL (c) == decl)
break;
}
else
for (c = gimple_omp_taskreg_clauses (up->stmt);
c; c = OMP_CLAUSE_CHAIN (c))
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED
&& OMP_CLAUSE_DECL (c) == decl)
break;
if (c)
goto maybe_mark_addressable_and_ret;
}
}
/* For tasks avoid using copy-in/out. As tasks can be
deferred or executed in different thread, when GOMP_task
returns, the task hasn't necessarily terminated. */
if (is_task_ctx (shared_ctx))
{
tree outer;
maybe_mark_addressable_and_ret:
outer = maybe_lookup_decl_in_outer_ctx (decl, shared_ctx);
if (is_gimple_reg (outer) && !omp_member_access_dummy_var (outer))
{
/* Taking address of OUTER in lower_send_shared_vars
might need regimplification of everything that uses the
variable. */
if (!task_shared_vars)
task_shared_vars = BITMAP_ALLOC (NULL);
bitmap_set_bit (task_shared_vars, DECL_UID (outer));
TREE_ADDRESSABLE (outer) = 1;
}
return true;
}
}
return false;
}
/* Construct a new automatic decl similar to VAR. */
static tree
omp_copy_decl_2 (tree var, tree name, tree type, omp_context *ctx)
{
tree copy = copy_var_decl (var, name, type);
DECL_CONTEXT (copy) = current_function_decl;
DECL_CHAIN (copy) = ctx->block_vars;
/* If VAR is listed in task_shared_vars, it means it wasn't
originally addressable and is just because task needs to take
it's address. But we don't need to take address of privatizations
from that var. */
if (TREE_ADDRESSABLE (var)
&& ((task_shared_vars
&& bitmap_bit_p (task_shared_vars, DECL_UID (var)))
|| (global_nonaddressable_vars
&& bitmap_bit_p (global_nonaddressable_vars, DECL_UID (var)))))
TREE_ADDRESSABLE (copy) = 0;
ctx->block_vars = copy;
return copy;
}
static tree
omp_copy_decl_1 (tree var, omp_context *ctx)
{
return omp_copy_decl_2 (var, DECL_NAME (var), TREE_TYPE (var), ctx);
}
/* Build COMPONENT_REF and set TREE_THIS_VOLATILE and TREE_READONLY on it
as appropriate. */
/* See also 'gcc/omp-oacc-neuter-broadcast.cc:oacc_build_component_ref'. */
static tree
omp_build_component_ref (tree obj, tree field)
{
tree ret = build3 (COMPONENT_REF, TREE_TYPE (field), obj, field, NULL);
if (TREE_THIS_VOLATILE (field))
TREE_THIS_VOLATILE (ret) |= 1;
if (TREE_READONLY (field))
TREE_READONLY (ret) |= 1;
return ret;
}
/* Build tree nodes to access the field for VAR on the receiver side. */
static tree
build_receiver_ref (tree var, bool by_ref, omp_context *ctx)
{
tree x, field = lookup_field (var, ctx);
/* If the receiver record type was remapped in the child function,
remap the field into the new record type. */
x = maybe_lookup_field (field, ctx);
if (x != NULL)
field = x;
x = build_simple_mem_ref (ctx->receiver_decl);
TREE_THIS_NOTRAP (x) = 1;
x = omp_build_component_ref (x, field);
if (by_ref)
{
x = build_simple_mem_ref (x);
TREE_THIS_NOTRAP (x) = 1;
}
return x;
}
/* Build tree nodes to access VAR in the scope outer to CTX. In the case
of a parallel, this is a component reference; for workshare constructs
this is some variable. */
static tree
build_outer_var_ref (tree var, omp_context *ctx,
enum omp_clause_code code = OMP_CLAUSE_ERROR)
{
tree x;
omp_context *outer = ctx->outer;
for (; outer; outer = outer->outer)
{
if (gimple_code (outer->stmt) == GIMPLE_OMP_TASKGROUP)
continue;
if (gimple_code (outer->stmt) == GIMPLE_OMP_SCOPE
&& !maybe_lookup_decl (var, outer))
continue;
break;
}
if (is_global_var (maybe_lookup_decl_in_outer_ctx (var, ctx)))
x = var;
else if (is_variable_sized (var))
{
x = TREE_OPERAND (DECL_VALUE_EXPR (var), 0);
x = build_outer_var_ref (x, ctx, code);
x = build_simple_mem_ref (x);
}
else if (is_taskreg_ctx (ctx))
{
bool by_ref = use_pointer_for_field (var, NULL);
x = build_receiver_ref (var, by_ref, ctx);
}
else if ((gimple_code (ctx->stmt) == GIMPLE_OMP_FOR
&& gimple_omp_for_kind (ctx->stmt) == GF_OMP_FOR_KIND_SIMD)
|| ctx->loop_p
|| (code == OMP_CLAUSE_PRIVATE
&& (gimple_code (ctx->stmt) == GIMPLE_OMP_FOR
|| gimple_code (ctx->stmt) == GIMPLE_OMP_SECTIONS
|| gimple_code (ctx->stmt) == GIMPLE_OMP_SINGLE)))
{
/* #pragma omp simd isn't a worksharing construct, and can reference
even private vars in its linear etc. clauses.
Similarly for OMP_CLAUSE_PRIVATE with outer ref, that can refer
to private vars in all worksharing constructs. */
x = NULL_TREE;
if (outer && is_taskreg_ctx (outer))
x = lookup_decl (var, outer);
else if (outer)
x = maybe_lookup_decl_in_outer_ctx (var, ctx);
if (x == NULL_TREE)
x = var;
}
else if (code == OMP_CLAUSE_LASTPRIVATE && is_taskloop_ctx (ctx))
{
gcc_assert (outer);
splay_tree_node n
= splay_tree_lookup (outer->field_map,
(splay_tree_key) &DECL_UID (var));
if (n == NULL)
{
if (is_global_var (maybe_lookup_decl_in_outer_ctx (var, outer)))
x = var;
else
x = lookup_decl (var, outer);
}
else
{
tree field = (tree) n->value;
/* If the receiver record type was remapped in the child function,
remap the field into the new record type. */
x = maybe_lookup_field (field, outer);
if (x != NULL)
field = x;
x = build_simple_mem_ref (outer->receiver_decl);
x = omp_build_component_ref (x, field);
if (use_pointer_for_field (var, outer))
x = build_simple_mem_ref (x);
}
}
else if (outer)
x = lookup_decl (var, outer);
else if (omp_privatize_by_reference (var))
/* This can happen with orphaned constructs. If var is reference, it is
possible it is shared and as such valid. */
x = var;
else if (omp_member_access_dummy_var (var))
x = var;
else
gcc_unreachable ();
if (x == var)
{
tree t = omp_member_access_dummy_var (var);
if (t)
{
x = DECL_VALUE_EXPR (var);
tree o = maybe_lookup_decl_in_outer_ctx (t, ctx);
if (o != t)
x = unshare_and_remap (x, t, o);
else
x = unshare_expr (x);
}
}
if (omp_privatize_by_reference (var))
x = build_simple_mem_ref (x);
return x;
}
/* Build tree nodes to access the field for VAR on the sender side. */
static tree
build_sender_ref (splay_tree_key key, omp_context *ctx)
{
tree field = lookup_sfield (key, ctx);
return omp_build_component_ref (ctx->sender_decl, field);
}
static tree
build_sender_ref (tree var, omp_context *ctx)
{
return build_sender_ref ((splay_tree_key) var, ctx);
}
/* Add a new field for VAR inside the structure CTX->SENDER_DECL. If
BASE_POINTERS_RESTRICT, declare the field with restrict. */
static void
install_var_field (tree var, bool by_ref, int mask, omp_context *ctx)
{
tree field, type, sfield = NULL_TREE;
splay_tree_key key = (splay_tree_key) var;
if ((mask & 16) != 0)
{
key = (splay_tree_key) &DECL_NAME (var);
gcc_checking_assert (key != (splay_tree_key) var);
}
if ((mask & 8) != 0)
{
key = (splay_tree_key) &DECL_UID (var);
gcc_checking_assert (key != (splay_tree_key) var);
}
gcc_assert ((mask & 1) == 0
|| !splay_tree_lookup (ctx->field_map, key));
gcc_assert ((mask & 2) == 0 || !ctx->sfield_map
|| !splay_tree_lookup (ctx->sfield_map, key));
gcc_assert ((mask & 3) == 3
|| !is_gimple_omp_oacc (ctx->stmt));
type = TREE_TYPE (var);
if ((mask & 16) != 0)
type = lang_hooks.decls.omp_array_data (var, true);
/* Prevent redeclaring the var in the split-off function with a restrict
pointer type. Note that we only clear type itself, restrict qualifiers in
the pointed-to type will be ignored by points-to analysis. */
if (POINTER_TYPE_P (type)
&& TYPE_RESTRICT (type))
type = build_qualified_type (type, TYPE_QUALS (type) & ~TYPE_QUAL_RESTRICT);
if (mask & 4)
{
gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
type = build_pointer_type (build_pointer_type (type));
}
else if (by_ref)
type = build_pointer_type (type);
else if ((mask & (32 | 3)) == 1
&& omp_privatize_by_reference (var))
type = TREE_TYPE (type);
field = build_decl (DECL_SOURCE_LOCATION (var),
FIELD_DECL, DECL_NAME (var), type);
/* Remember what variable this field was created for. This does have a
side effect of making dwarf2out ignore this member, so for helpful
debugging we clear it later in delete_omp_context. */
DECL_ABSTRACT_ORIGIN (field) = var;
if ((mask & 16) == 0 && type == TREE_TYPE (var))
{
SET_DECL_ALIGN (field, DECL_ALIGN (var));
DECL_USER_ALIGN (field) = DECL_USER_ALIGN (var);
TREE_THIS_VOLATILE (field) = TREE_THIS_VOLATILE (var);
}
else
SET_DECL_ALIGN (field, TYPE_ALIGN (type));
if ((mask & 3) == 3)
{
insert_field_into_struct (ctx->record_type, field);
if (ctx->srecord_type)
{
sfield = build_decl (DECL_SOURCE_LOCATION (var),
FIELD_DECL, DECL_NAME (var), type);
DECL_ABSTRACT_ORIGIN (sfield) = var;
SET_DECL_ALIGN (sfield, DECL_ALIGN (field));
DECL_USER_ALIGN (sfield) = DECL_USER_ALIGN (field);
TREE_THIS_VOLATILE (sfield) = TREE_THIS_VOLATILE (field);
insert_field_into_struct (ctx->srecord_type, sfield);
}
}
else
{
if (ctx->srecord_type == NULL_TREE)
{
tree t;
ctx->srecord_type = lang_hooks.types.make_type (RECORD_TYPE);
ctx->sfield_map = splay_tree_new (splay_tree_compare_pointers, 0, 0);
for (t = TYPE_FIELDS (ctx->record_type); t ; t = TREE_CHAIN (t))
{
sfield = build_decl (DECL_SOURCE_LOCATION (t),
FIELD_DECL, DECL_NAME (t), TREE_TYPE (t));
DECL_ABSTRACT_ORIGIN (sfield) = DECL_ABSTRACT_ORIGIN (t);
insert_field_into_struct (ctx->srecord_type, sfield);
splay_tree_insert (ctx->sfield_map,
(splay_tree_key) DECL_ABSTRACT_ORIGIN (t),
(splay_tree_value) sfield);
}
}
sfield = field;
insert_field_into_struct ((mask & 1) ? ctx->record_type
: ctx->srecord_type, field);
}
if (mask & 1)
splay_tree_insert (ctx->field_map, key, (splay_tree_value) field);
if ((mask & 2) && ctx->sfield_map)
splay_tree_insert (ctx->sfield_map, key, (splay_tree_value) sfield);
}
static tree
install_var_local (tree var, omp_context *ctx)
{
tree new_var = omp_copy_decl_1 (var, ctx);
insert_decl_map (&ctx->cb, var, new_var);
return new_var;
}
/* Adjust the replacement for DECL in CTX for the new context. This means
copying the DECL_VALUE_EXPR, and fixing up the type. */
static void
fixup_remapped_decl (tree decl, omp_context *ctx, bool private_debug)
{
tree new_decl, size;
new_decl = lookup_decl (decl, ctx);
TREE_TYPE (new_decl) = remap_type (TREE_TYPE (decl), &ctx->cb);
if ((!TREE_CONSTANT (DECL_SIZE (new_decl)) || private_debug)
&& DECL_HAS_VALUE_EXPR_P (decl))
{
tree ve = DECL_VALUE_EXPR (decl);
walk_tree (&ve, copy_tree_body_r, &ctx->cb, NULL);
SET_DECL_VALUE_EXPR (new_decl, ve);
DECL_HAS_VALUE_EXPR_P (new_decl) = 1;
}
if (!TREE_CONSTANT (DECL_SIZE (new_decl)))
{
size = remap_decl (DECL_SIZE (decl), &ctx->cb);
if (size == error_mark_node)
size = TYPE_SIZE (TREE_TYPE (new_decl));
DECL_SIZE (new_decl) = size;
size = remap_decl (DECL_SIZE_UNIT (decl), &ctx->cb);
if (size == error_mark_node)
size = TYPE_SIZE_UNIT (TREE_TYPE (new_decl));
DECL_SIZE_UNIT (new_decl) = size;
}
}
/* The callback for remap_decl. Search all containing contexts for a
mapping of the variable; this avoids having to duplicate the splay
tree ahead of time. We know a mapping doesn't already exist in the
given context. Create new mappings to implement default semantics. */
static tree
omp_copy_decl (tree var, copy_body_data *cb)
{
omp_context *ctx = (omp_context *) cb;
tree new_var;
if (TREE_CODE (var) == LABEL_DECL)
{
if (FORCED_LABEL (var) || DECL_NONLOCAL (var))
return var;
new_var = create_artificial_label (DECL_SOURCE_LOCATION (var));
DECL_CONTEXT (new_var) = current_function_decl;
insert_decl_map (&ctx->cb, var, new_var);
return new_var;
}
while (!is_taskreg_ctx (ctx))
{
ctx = ctx->outer;
if (ctx == NULL)
return var;
new_var = maybe_lookup_decl (var, ctx);
if (new_var)
return new_var;
}
if (is_global_var (var) || decl_function_context (var) != ctx->cb.src_fn)
return var;
return error_mark_node;
}
/* Create a new context, with OUTER_CTX being the surrounding context. */
static omp_context *
new_omp_context (gimple *stmt, omp_context *outer_ctx)
{
omp_context *ctx = XCNEW (omp_context);
splay_tree_insert (all_contexts, (splay_tree_key) stmt,
(splay_tree_value) ctx);
ctx->stmt = stmt;
if (outer_ctx)
{
ctx->outer = outer_ctx;
ctx->cb = outer_ctx->cb;
ctx->cb.block = NULL;
ctx->depth = outer_ctx->depth + 1;
}
else
{
ctx->cb.src_fn = current_function_decl;
ctx->cb.dst_fn = current_function_decl;
ctx->cb.src_node = cgraph_node::get (current_function_decl);
gcc_checking_assert (ctx->cb.src_node);
ctx->cb.dst_node = ctx->cb.src_node;
ctx->cb.src_cfun = cfun;
ctx->cb.copy_decl = omp_copy_decl;
ctx->cb.eh_lp_nr = 0;
ctx->cb.transform_call_graph_edges = CB_CGE_MOVE;
ctx->cb.adjust_array_error_bounds = true;
ctx->cb.dont_remap_vla_if_no_change = true;
ctx->depth = 1;
}
ctx->cb.decl_map = new hash_map<tree, tree>;
return ctx;
}
static gimple_seq maybe_catch_exception (gimple_seq);
/* Finalize task copyfn. */
static void
finalize_task_copyfn (gomp_task *task_stmt)
{
struct function *child_cfun;
tree child_fn;
gimple_seq seq = NULL, new_seq;
gbind *bind;
child_fn = gimple_omp_task_copy_fn (task_stmt);
if (child_fn == NULL_TREE)
return;
child_cfun = DECL_STRUCT_FUNCTION (child_fn);
DECL_STRUCT_FUNCTION (child_fn)->curr_properties = cfun->curr_properties;
push_cfun (child_cfun);
bind = gimplify_body (child_fn, false);
gimple_seq_add_stmt (&seq, bind);
new_seq = maybe_catch_exception (seq);
if (new_seq != seq)
{
bind = gimple_build_bind (NULL, new_seq, NULL);
seq = NULL;
gimple_seq_add_stmt (&seq, bind);
}
gimple_set_body (child_fn, seq);
pop_cfun ();
/* Inform the callgraph about the new function. */
cgraph_node *node = cgraph_node::get_create (child_fn);
node->parallelized_function = 1;
cgraph_node::add_new_function (child_fn, false);
}
/* Destroy a omp_context data structures. Called through the splay tree
value delete callback. */
static void
delete_omp_context (splay_tree_value value)
{
omp_context *ctx = (omp_context *) value;
delete ctx->cb.decl_map;
if (ctx->field_map)
splay_tree_delete (ctx->field_map);
if (ctx->sfield_map)
splay_tree_delete (ctx->sfield_map);
/* We hijacked DECL_ABSTRACT_ORIGIN earlier. We need to clear it before
it produces corrupt debug information. */
if (ctx->record_type)
{
tree t;
for (t = TYPE_FIELDS (ctx->record_type); t ; t = DECL_CHAIN (t))
DECL_ABSTRACT_ORIGIN (t) = NULL;
}
if (ctx->srecord_type)
{
tree t;
for (t = TYPE_FIELDS (ctx->srecord_type); t ; t = DECL_CHAIN (t))
DECL_ABSTRACT_ORIGIN (t) = NULL;
}
if (is_task_ctx (ctx))
finalize_task_copyfn (as_a <gomp_task *> (ctx->stmt));
if (ctx->task_reduction_map)
{
ctx->task_reductions.release ();
delete ctx->task_reduction_map;
}
delete ctx->lastprivate_conditional_map;
delete ctx->allocate_map;
XDELETE (ctx);
}
/* Fix up RECEIVER_DECL with a type that has been remapped to the child
context. */
static void
fixup_child_record_type (omp_context *ctx)
{
tree f, type = ctx->record_type;
if (!ctx->receiver_decl)
return;
/* ??? It isn't sufficient to just call remap_type here, because
variably_modified_type_p doesn't work the way we expect for
record types. Testing each field for whether it needs remapping
and creating a new record by hand works, however. */
for (f = TYPE_FIELDS (type); f ; f = DECL_CHAIN (f))
if (variably_modified_type_p (TREE_TYPE (f), ctx->cb.src_fn))
break;
if (f)
{
tree name, new_fields = NULL;
type = lang_hooks.types.make_type (RECORD_TYPE);
name = DECL_NAME (TYPE_NAME (ctx->record_type));
name = build_decl (DECL_SOURCE_LOCATION (ctx->receiver_decl),
TYPE_DECL, name, type);
TYPE_NAME (type) = name;
for (f = TYPE_FIELDS (ctx->record_type); f ; f = DECL_CHAIN (f))
{
tree new_f = copy_node (f);
DECL_CONTEXT (new_f) = type;
TREE_TYPE (new_f) = remap_type (TREE_TYPE (f), &ctx->cb);
DECL_CHAIN (new_f) = new_fields;
walk_tree (&DECL_SIZE (new_f), copy_tree_body_r, &ctx->cb, NULL);
walk_tree (&DECL_SIZE_UNIT (new_f), copy_tree_body_r,
&ctx->cb, NULL);
walk_tree (&DECL_FIELD_OFFSET (new_f), copy_tree_body_r,
&ctx->cb, NULL);
new_fields = new_f;
/* Arrange to be able to look up the receiver field
given the sender field. */
splay_tree_insert (ctx->field_map, (splay_tree_key) f,
(splay_tree_value) new_f);
}
TYPE_FIELDS (type) = nreverse (new_fields);
layout_type (type);
}
/* In a target region we never modify any of the pointers in *.omp_data_i,
so attempt to help the optimizers. */
if (is_gimple_omp_offloaded (ctx->stmt))
type = build_qualified_type (type, TYPE_QUAL_CONST);
TREE_TYPE (ctx->receiver_decl)
= build_qualified_type (build_reference_type (type), TYPE_QUAL_RESTRICT);
}
/* Instantiate decls as necessary in CTX to satisfy the data sharing
specified by CLAUSES. */
static void
scan_sharing_clauses (tree clauses, omp_context *ctx)
{
tree c, decl;
bool scan_array_reductions = false;
for (c = clauses; c; c = OMP_CLAUSE_CHAIN (c))
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_ALLOCATE
&& (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c) == NULL_TREE
/* omp_default_mem_alloc is 1 */
|| !integer_onep (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c))
|| OMP_CLAUSE_ALLOCATE_ALIGN (c) != NULL_TREE))
{
if (ctx->allocate_map == NULL)
ctx->allocate_map = new hash_map<tree, tree>;
tree val = integer_zero_node;
if (OMP_CLAUSE_ALLOCATE_ALLOCATOR (c))
val = OMP_CLAUSE_ALLOCATE_ALLOCATOR (c);
if (OMP_CLAUSE_ALLOCATE_ALIGN (c))
val = build_tree_list (val, OMP_CLAUSE_ALLOCATE_ALIGN (c));
ctx->allocate_map->put (OMP_CLAUSE_DECL (c), val);
}
for (c = clauses; c; c = OMP_CLAUSE_CHAIN (c))
{
bool by_ref;
switch (OMP_CLAUSE_CODE (c))
{
case OMP_CLAUSE_PRIVATE:
decl = OMP_CLAUSE_DECL (c);
if (OMP_CLAUSE_PRIVATE_OUTER_REF (c))
goto do_private;
else if (!is_variable_sized (decl))
install_var_local (decl, ctx);
break;
case OMP_CLAUSE_SHARED:
decl = OMP_CLAUSE_DECL (c);
if (ctx->allocate_map && ctx->allocate_map->get (decl))
ctx->allocate_map->remove (decl);
/* Ignore shared directives in teams construct inside of
target construct. */
if (gimple_code (ctx->stmt) == GIMPLE_OMP_TEAMS
&& !is_host_teams_ctx (ctx))
{
/* Global variables don't need to be copied,
the receiver side will use them directly. */
tree odecl = maybe_lookup_decl_in_outer_ctx (decl, ctx);
if (is_global_var (odecl))
break;
insert_decl_map (&ctx->cb, decl, odecl);
break;
}
gcc_assert (is_taskreg_ctx (ctx));
gcc_assert (!COMPLETE_TYPE_P (TREE_TYPE (decl))
|| !is_variable_sized (decl));
/* Global variables don't need to be copied,
the receiver side will use them directly. */
if (is_global_var (maybe_lookup_decl_in_outer_ctx (decl, ctx)))
break;
if (OMP_CLAUSE_SHARED_FIRSTPRIVATE (c))
{
use_pointer_for_field (decl, ctx);
break;
}
by_ref = use_pointer_for_field (decl, NULL);
if ((! TREE_READONLY (decl) && !OMP_CLAUSE_SHARED_READONLY (c))
|| TREE_ADDRESSABLE (decl)
|| by_ref
|| omp_privatize_by_reference (decl))
{
by_ref = use_pointer_for_field (decl, ctx);
install_var_field (decl, by_ref, 3, ctx);
install_var_local (decl, ctx);
break;
}
/* We don't need to copy const scalar vars back. */
OMP_CLAUSE_SET_CODE (c, OMP_CLAUSE_FIRSTPRIVATE);
goto do_private;
case OMP_CLAUSE_REDUCTION:
/* Collect 'reduction' clauses on OpenACC compute construct. */
if (is_gimple_omp_oacc (ctx->stmt)
&& is_gimple_omp_offloaded (ctx->stmt))
{
/* No 'reduction' clauses on OpenACC 'kernels'. */
gcc_checking_assert (!is_oacc_kernels (ctx));
/* Likewise, on OpenACC 'kernels' decomposed parts. */
gcc_checking_assert (!is_oacc_kernels_decomposed_part (ctx));
ctx->local_reduction_clauses
= tree_cons (NULL, c, ctx->local_reduction_clauses);
}
/* FALLTHRU */
case OMP_CLAUSE_IN_REDUCTION:
decl = OMP_CLAUSE_DECL (c);
if (ctx->allocate_map
&& ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION
&& (OMP_CLAUSE_REDUCTION_INSCAN (c)
|| OMP_CLAUSE_REDUCTION_TASK (c)))
|| OMP_CLAUSE_CODE (c) == OMP_CLAUSE_IN_REDUCTION
|| is_task_ctx (ctx)))
{
/* For now. */
if (ctx->allocate_map->get (decl))
ctx->allocate_map->remove (decl);
}
if (TREE_CODE (decl) == MEM_REF)
{
tree t = TREE_OPERAND (decl, 0);
if (TREE_CODE (t) == POINTER_PLUS_EXPR)
t = TREE_OPERAND (t, 0);
if (TREE_CODE (t) == INDIRECT_REF
|| TREE_CODE (t) == ADDR_EXPR)
t = TREE_OPERAND (t, 0);
if (is_omp_target (ctx->stmt))
{
if (is_variable_sized (t))
{
gcc_assert (DECL_HAS_VALUE_EXPR_P (t));
t = DECL_VALUE_EXPR (t);
gcc_assert (TREE_CODE (t) == INDIRECT_REF);
t = TREE_OPERAND (t, 0);
gcc_assert (DECL_P (t));
}
tree at = t;
if (ctx->outer)
scan_omp_op (&at, ctx->outer);
tree nt = omp_copy_decl_1 (at, ctx);
splay_tree_insert (ctx->field_map,
(splay_tree_key) &DECL_CONTEXT (t),
(splay_tree_value) nt);
if (at != t)
splay_tree_insert (ctx->field_map,
(splay_tree_key) &DECL_CONTEXT (at),
(splay_tree_value) nt);
break;
}
install_var_local (t, ctx);
if (is_taskreg_ctx (ctx)
&& (!is_global_var (maybe_lookup_decl_in_outer_ctx (t, ctx))
|| (is_task_ctx (ctx)
&& (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE
|| (TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE
&& (TREE_CODE (TREE_TYPE (TREE_TYPE (t)))
== POINTER_TYPE)))))
&& !is_variable_sized (t)
&& (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_REDUCTION
|| (!OMP_CLAUSE_REDUCTION_TASK (c)
&& !is_task_ctx (ctx))))
{
by_ref = use_pointer_for_field (t, NULL);
if (is_task_ctx (ctx)
&& TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE
&& TREE_CODE (TREE_TYPE (TREE_TYPE (t))) == POINTER_TYPE)
{
install_var_field (t, false, 1, ctx);
install_var_field (t, by_ref, 2, ctx);
}
else
install_var_field (t, by_ref, 3, ctx);
}
break;
}
if (is_omp_target (ctx->stmt))
{
tree at = decl;
if (ctx->outer)
scan_omp_op (&at, ctx->outer);
tree nt = omp_copy_decl_1 (at, ctx);
splay_tree_insert (ctx->field_map,
(splay_tree_key) &DECL_CONTEXT (decl),
(splay_tree_value) nt);
if (at != decl)
splay_tree_insert (ctx->field_map,
(splay_tree_key) &DECL_CONTEXT (at),
(splay_tree_value) nt);
break;
}
if (is_task_ctx (ctx)
|| (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION
&& OMP_CLAUSE_REDUCTION_TASK (c)
&& is_parallel_ctx (ctx)))
{
/* Global variables don't need to be copied,
the receiver side will use them directly. */
if (!is_global_var (maybe_lookup_decl_in_outer_ctx (decl, ctx)))
{
by_ref = use_pointer_for_field (decl, ctx);
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_IN_REDUCTION)
install_var_field (decl, by_ref, 3, ctx);
}
install_var_local (decl, ctx);
break;
}
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION
&& OMP_CLAUSE_REDUCTION_TASK (c))
{
install_var_local (decl, ctx);
break;
}
goto do_private;
case OMP_CLAUSE_LASTPRIVATE:
/* Let the corresponding firstprivate clause create
the variable. */
if (OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (c))
break;
/* FALLTHRU */
case OMP_CLAUSE_FIRSTPRIVATE:
case OMP_CLAUSE_LINEAR:
decl = OMP_CLAUSE_DECL (c);
do_private:
if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE
|| OMP_CLAUSE_CODE (c) == OMP_CLAUSE_IS_DEVICE_PTR)
&& is_gimple_omp_offloaded (ctx->stmt))
{
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE)
{
by_ref = !omp_privatize_by_reference (decl);
install_var_field (decl, by_ref, 3, ctx);
}
else if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
install_var_field (decl, true, 3, ctx);
else
install_var_field (decl, false, 3, ctx);
}
if (is_variable_sized (decl))
{
if (is_task_ctx (ctx))
{
if (ctx->allocate_map
&& OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE)
{
/* For now. */
if (ctx->allocate_map->get (decl))
ctx->allocate_map->remove (decl);
}
install_var_field (decl, false, 1, ctx);
}
break;
}
else if (is_taskreg_ctx (ctx))
{
bool global
= is_global_var (maybe_lookup_decl_in_outer_ctx (decl, ctx));
by_ref = use_pointer_for_field (decl, NULL);
if (is_task_ctx (ctx)
&& (global || by_ref || omp_privatize_by_reference (decl)))
{
if (ctx->allocate_map
&& ctx->allocate_map->get (decl))
install_var_field (decl, by_ref, 32 | 1, ctx);
else
install_var_field (decl, false, 1, ctx);
if (!global)
install_var_field (decl, by_ref, 2, ctx);
}
else if (!global)
install_var_field (decl, by_ref, 3, ctx);
}
install_var_local (decl, ctx);
break;
case OMP_CLAUSE_USE_DEVICE_PTR:
case OMP_CLAUSE_USE_DEVICE_ADDR:
decl = OMP_CLAUSE_DECL (c);
/* Fortran array descriptors. */
if (lang_hooks.decls.omp_array_data (decl, true))
install_var_field (decl, false, 19, ctx);
else if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_USE_DEVICE_ADDR
&& !omp_privatize_by_reference (decl)
&& !omp_is_allocatable_or_ptr (decl))
|| TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
install_var_field (decl, true, 11, ctx);
else
install_var_field (decl, false, 11, ctx);
if (DECL_SIZE (decl)
&& TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)
{
tree decl2 = DECL_VALUE_EXPR (decl);
gcc_assert (TREE_CODE (decl2) == INDIRECT_REF);
decl2 = TREE_OPERAND (decl2, 0);
gcc_assert (DECL_P (decl2));
install_var_local (decl2, ctx);
}
install_var_local (decl, ctx);
break;
case OMP_CLAUSE_IS_DEVICE_PTR:
decl = OMP_CLAUSE_DECL (c);
goto do_private;
case OMP_CLAUSE__LOOPTEMP_:
case OMP_CLAUSE__REDUCTEMP_:
gcc_assert (is_taskreg_ctx (ctx));
decl = OMP_CLAUSE_DECL (c);
install_var_field (decl, false, 3, ctx);
install_var_local (decl, ctx);
break;
case OMP_CLAUSE_COPYPRIVATE:
case OMP_CLAUSE_COPYIN:
decl = OMP_CLAUSE_DECL (c);
by_ref = use_pointer_for_field (decl, NULL);
install_var_field (decl, by_ref, 3, ctx);
break;
case OMP_CLAUSE_FINAL:
case OMP_CLAUSE_IF:
case OMP_CLAUSE_NUM_THREADS:
case OMP_CLAUSE_NUM_TEAMS:
case OMP_CLAUSE_THREAD_LIMIT:
case OMP_CLAUSE_DEVICE:
case OMP_CLAUSE_SCHEDULE:
case OMP_CLAUSE_DIST_SCHEDULE:
case OMP_CLAUSE_DEPEND:
case OMP_CLAUSE_PRIORITY:
case OMP_CLAUSE_GRAINSIZE:
case OMP_CLAUSE_NUM_TASKS:
case OMP_CLAUSE_NUM_GANGS:
case OMP_CLAUSE_NUM_WORKERS:
case OMP_CLAUSE_VECTOR_LENGTH:
case OMP_CLAUSE_DETACH:
case OMP_CLAUSE_FILTER:
if (ctx->outer)
scan_omp_op (&OMP_CLAUSE_OPERAND (c, 0), ctx->outer);
break;
case OMP_CLAUSE_TO:
case OMP_CLAUSE_FROM:
case OMP_CLAUSE_MAP:
if (ctx->outer)
scan_omp_op (&OMP_CLAUSE_SIZE (c), ctx->outer);
decl = OMP_CLAUSE_DECL (c);
/* Global variables with "omp declare target" attribute
don't need to be copied, the receiver side will use them
directly. However, global variables with "omp declare target link"
attribute need to be copied. Or when ALWAYS modifier is used. */
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP
&& DECL_P (decl)
&& ((OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_FIRSTPRIVATE_POINTER
&& (OMP_CLAUSE_MAP_KIND (c)
!= GOMP_MAP_FIRSTPRIVATE_REFERENCE)
&& OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_ATTACH
&& OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_DETACH)
|| TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
&& OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_ALWAYS_TO
&& OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_ALWAYS_FROM
&& OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_ALWAYS_TOFROM
&& OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_TO_PSET
&& is_global_var (maybe_lookup_decl_in_outer_ctx (decl, ctx))
&& varpool_node::get_create (decl)->offloadable
&& !lookup_attribute ("omp declare target link",
DECL_ATTRIBUTES (decl)))
break;
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP
&& OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_POINTER)
{
/* Ignore GOMP_MAP_POINTER kind for arrays in regions that are
not offloaded; there is nothing to map for those. */
if (!is_gimple_omp_offloaded (ctx->stmt)
&& !POINTER_TYPE_P (TREE_TYPE (decl))
&& !OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION (c))
break;
}
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP
&& DECL_P (decl)
&& (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH
|| OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_DETACH)
&& is_omp_target (ctx->stmt))
{
/* If this is an offloaded region, an attach operation should
only exist when the pointer variable is mapped in a prior
clause. */
if (is_gimple_omp_offloaded (ctx->stmt))
gcc_assert
(maybe_lookup_decl (decl, ctx)
|| (is_global_var (maybe_lookup_decl_in_outer_ctx (decl, ctx))
&& lookup_attribute ("omp declare target",
DECL_ATTRIBUTES (decl))));
/* By itself, attach/detach is generated as part of pointer
variable mapping and should not create new variables in the
offloaded region, however sender refs for it must be created
for its address to be passed to the runtime. */
tree field
= build_decl (OMP_CLAUSE_LOCATION (c),
FIELD_DECL, NULL_TREE, ptr_type_node);
SET_DECL_ALIGN (field, TYPE_ALIGN (ptr_type_node));
insert_field_into_struct (ctx->record_type, field);
/* To not clash with a map of the pointer variable itself,
attach/detach maps have their field looked up by the *clause*
tree expression, not the decl. */
gcc_assert (!splay_tree_lookup (ctx->field_map,
(splay_tree_key) c));
splay_tree_insert (ctx->field_map, (splay_tree_key) c,
(splay_tree_value) field);
break;
}
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP
&& (OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_POINTER
|| (OMP_CLAUSE_MAP_KIND (c)
== GOMP_MAP_FIRSTPRIVATE_REFERENCE)))
{
if (TREE_CODE (decl) == COMPONENT_REF
|| (TREE_CODE (decl) == INDIRECT_REF
&& TREE_CODE (TREE_OPERAND (decl, 0)) == COMPONENT_REF
&& (TREE_CODE (TREE_TYPE (TREE_OPERAND (decl, 0)))
== REFERENCE_TYPE)))
break;
if (DECL_SIZE (decl)
&& TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)
{
tree decl2 = DECL_VALUE_EXPR (decl);
gcc_assert (TREE_CODE (decl2) == INDIRECT_REF);
decl2 = TREE_OPERAND (decl2, 0);
gcc_assert (DECL_P (decl2));
install_var_local (decl2, ctx);
}
install_var_local (decl, ctx);
break;
}
if (DECL_P (decl))
{
if (DECL_SIZE (decl)
&& TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)
{
tree decl2 = DECL_VALUE_EXPR (decl);
gcc_assert (TREE_CODE (decl2) == INDIRECT_REF);
decl2 = TREE_OPERAND (decl2, 0);
gcc_assert (DECL_P (decl2));
install_var_field (decl2, true, 3, ctx);
install_var_local (decl2, ctx);
install_var_local (decl, ctx);
}
else
{
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_MAP
&& OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_POINTER
&& !OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION (c)
&& TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
install_var_field (decl, true, 7, ctx);
else
install_var_field (decl, true, 3, ctx);
if (is_gimple_omp_offloaded (ctx->stmt)
&& !(is_gimple_omp_oacc (ctx->stmt)
&& OMP_CLAUSE_MAP_IN_REDUCTION (c)))
install_var_local (decl, ctx);
}
}
else
{
tree base = get_base_address (decl);
tree nc = OMP_CLAUSE_CHAIN (c);
if (DECL_P (base)
&& nc != NULL_TREE
&& OMP_CLAUSE_CODE (nc) == OMP_CLAUSE_MAP
&& OMP_CLAUSE_DECL (nc) == base
&& OMP_CLAUSE_MAP_KIND (nc) == GOMP_MAP_POINTER
&& integer_zerop (OMP_CLAUSE_SIZE (nc)))
{
OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION (c) = 1;
OMP_CLAUSE_MAP_ZERO_BIAS_ARRAY_SECTION (nc) = 1;
}
else
{
if (ctx->outer)
{
scan_omp_op (&OMP_CLAUSE_DECL (c), ctx->outer);
decl = OMP_CLAUSE_DECL (c);
}
gcc_assert (!splay_tree_lookup (ctx->field_map,
(splay_tree_key) decl));
tree field
= build_decl (OMP_CLAUSE_LOCATION (c),
FIELD_DECL, NULL_TREE, ptr_type_node);
SET_DECL_ALIGN (field, TYPE_ALIGN (ptr_type_node));
insert_field_into_struct (ctx->record_type, field);
splay_tree_insert (ctx->field_map, (splay_tree_key) decl,
(splay_tree_value) field);
}
}
break;
case OMP_CLAUSE_ORDER:
ctx->order_concurrent = true;
break;
case OMP_CLAUSE_BIND:
ctx->loop_p = true;
break;
case OMP_CLAUSE_NOWAIT:
case OMP_CLAUSE_ORDERED:
case OMP_CLAUSE_COLLAPSE:
case OMP_CLAUSE_UNTIED:
case OMP_CLAUSE_MERGEABLE:
case OMP_CLAUSE_PROC_BIND:
case OMP_CLAUSE_SAFELEN:
case OMP_CLAUSE_SIMDLEN:
case OMP_CLAUSE_THREADS:
case OMP_CLAUSE_SIMD:
case OMP_CLAUSE_NOGROUP:
case OMP_CLAUSE_DEFAULTMAP:
case OMP_CLAUSE_ASYNC:
case OMP_CLAUSE_WAIT:
case OMP_CLAUSE_GANG:
case OMP_CLAUSE_WORKER:
case OMP_CLAUSE_VECTOR:
case OMP_CLAUSE_INDEPENDENT:
case OMP_CLAUSE_AUTO:
case OMP_CLAUSE_SEQ:
case OMP_CLAUSE_TILE:
case OMP_CLAUSE__SIMT_:
case OMP_CLAUSE_DEFAULT:
case OMP_CLAUSE_NONTEMPORAL:
case OMP_CLAUSE_IF_PRESENT:
case OMP_CLAUSE_FINALIZE:
case OMP_CLAUSE_TASK_REDUCTION:
case OMP_CLAUSE_ALLOCATE:
break;
case OMP_CLAUSE_ALIGNED:
decl = OMP_CLAUSE_DECL (c);
if (is_global_var (decl)
&& TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
install_var_local (decl, ctx);
break;
case OMP_CLAUSE__CONDTEMP_:
decl = OMP_CLAUSE_DECL (c);
if (is_parallel_ctx (ctx))
{
install_var_field (decl, false, 3, ctx);
install_var_local (decl, ctx);
}
else if (gimple_code (ctx->stmt) == GIMPLE_OMP_FOR
&& gimple_omp_for_kind (ctx->stmt) == GF_OMP_FOR_KIND_SIMD
&& !OMP_CLAUSE__CONDTEMP__ITER (c))
install_var_local (decl, ctx);
break;
case OMP_CLAUSE__CACHE_:
case OMP_CLAUSE_NOHOST:
default:
gcc_unreachable ();
}
}
for (c = clauses; c; c = OMP_CLAUSE_CHAIN (c))
{
switch (OMP_CLAUSE_CODE (c))
{
case OMP_CLAUSE_LASTPRIVATE:
/* Let the corresponding firstprivate clause create
the variable. */
if (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c))
scan_array_reductions = true;
if (OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (c))
break;
/* FALLTHRU */
case OMP_CLAUSE_FIRSTPRIVATE:
case OMP_CLAUSE_PRIVATE:
case OMP_CLAUSE_LINEAR:
case OMP_CLAUSE_IS_DEVICE_PTR:
decl = OMP_CLAUSE_DECL (c);
if (is_variable_sized (decl))
{
if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE
|| OMP_CLAUSE_CODE (c) == OMP_CLAUSE_IS_DEVICE_PTR)
&& is_gimple_omp_offloaded (ctx->stmt))
{
tree decl2 = DECL_VALUE_EXPR (decl);
gcc_assert (TREE_CODE (decl2) == INDIRECT_REF);
decl2 = TREE_OPERAND (decl2, 0);
gcc_assert (DECL_P (decl2));
install_var_local (decl2, ctx);
fixup_remapped_decl (decl2, ctx, false);
}
install_var_local (decl, ctx);
}
fixup_remapped_decl (decl, ctx,
OMP_CLAUSE_CODE (c) == OMP_CLAUSE_PRIVATE
&& OMP_CLAUSE_PRIVATE_DEBUG (c));
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR
&& OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c))
scan_array_reductions = true;
break;
case OMP_CLAUSE_REDUCTION:
case OMP_CLAUSE_IN_REDUCTION:
decl = OMP_CLAUSE_DECL (c);
if (TREE_CODE (decl) != MEM_REF && !is_omp_target (ctx->stmt))
{
if (is_variable_sized (decl))
install_var_local (decl, ctx);
fixup_remapped_decl (decl, ctx, false);
}
if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (c))
scan_array_reductions = true;
break;
case OMP_CLAUSE_TASK_REDUCTION:
if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (c))
scan_array_reductions = true;
break;
case OMP_CLAUSE_SHARED:
/* Ignore shared directives in teams construct inside of
target construct. */
if (gimple_code (ctx->stmt) == GIMPLE_OMP_TEAMS
&& !is_host_teams_ctx (ctx))
break;
decl = OMP_CLAUSE_DECL (c);
if (is_global_var (maybe_lookup_decl_in_outer_ctx (decl, ctx)))
break;
if (OMP_CLAUSE_SHARED_FIRSTPRIVATE (c))
{
if (is_global_var (maybe_lookup_decl_in_outer_ctx (decl,
ctx->outer)))
break;
bool by_ref = use_pointer_for_field (decl, ctx);
install_var_field (decl, by_ref, 11, ctx);
break;
}
fixup_remapped_decl (decl, ctx, false);
break;
case OMP_CLAUSE_MAP:
if (!is_gimple_omp_offloaded (ctx->stmt))
break;
decl = OMP_CLAUSE_DECL (c);
if (DECL_P (decl)
&& ((OMP_CLAUSE_MAP_KIND (c) != GOMP_MAP_FIRSTPRIVATE_POINTER
&& (OMP_CLAUSE_MAP_KIND (c)
!= GOMP_MAP_FIRSTPRIVATE_REFERENCE))
|| TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
&& is_global_var (maybe_lookup_decl_in_outer_ctx (decl, ctx))
&& varpool_node::get_create (decl)->offloadable)
break;
if ((OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_ATTACH
|| OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_DETACH)
&& is_omp_target (ctx->stmt)
&& !is_gimple_omp_offloaded (ctx->stmt))
break;
if (DECL_P (decl))
{
if ((OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_POINTER
|| OMP_CLAUSE_MAP_KIND (c) == GOMP_MAP_FIRSTPRIVATE_POINTER)
&& TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
&& !COMPLETE_TYPE_P (TREE_TYPE (decl)))
{
tree new_decl = lookup_decl (decl, ctx);
TREE_TYPE (new_decl)
= remap_type (TREE_TYPE (decl), &ctx->cb);
}
else if (DECL_SIZE (decl)
&& TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)
{
tree decl2 = DECL_VALUE_EXPR (decl);
gcc_assert (TREE_CODE (decl2) == INDIRECT_REF);
decl2 = TREE_OPERAND (decl2, 0);
gcc_assert (DECL_P (decl2));
fixup_remapped_decl (decl2, ctx, false);
fixup_remapped_decl (decl, ctx, true);
}
else
fixup_remapped_decl (decl, ctx, false);
}
break;
case OMP_CLAUSE_COPYPRIVATE:
case OMP_CLAUSE_COPYIN:
case OMP_CLAUSE_DEFAULT:
case OMP_CLAUSE_IF:
case OMP_CLAUSE_NUM_THREADS:
case OMP_CLAUSE_NUM_TEAMS:
case OMP_CLAUSE_THREAD_LIMIT:
case OMP_CLAUSE_DEVICE:
case OMP_CLAUSE_SCHEDULE:
case OMP_CLAUSE_DIST_SCHEDULE:
case OMP_CLAUSE_NOWAIT:
case OMP_CLAUSE_ORDERED:
case OMP_CLAUSE_COLLAPSE:
case OMP_CLAUSE_UNTIED:
case OMP_CLAUSE_FINAL:
case OMP_CLAUSE_MERGEABLE:
case OMP_CLAUSE_PROC_BIND:
case OMP_CLAUSE_SAFELEN:
case OMP_CLAUSE_SIMDLEN:
case OMP_CLAUSE_ALIGNED:
case OMP_CLAUSE_DEPEND:
case OMP_CLAUSE_DETACH:
case OMP_CLAUSE_ALLOCATE:
case OMP_CLAUSE__LOOPTEMP_:
case OMP_CLAUSE__REDUCTEMP_:
case OMP_CLAUSE_TO:
case OMP_CLAUSE_FROM:
case OMP_CLAUSE_PRIORITY:
case OMP_CLAUSE_GRAINSIZE:
case OMP_CLAUSE_NUM_TASKS:
case OMP_CLAUSE_THREADS:
case OMP_CLAUSE_SIMD:
case OMP_CLAUSE_NOGROUP:
case OMP_CLAUSE_DEFAULTMAP:
case OMP_CLAUSE_ORDER:
case OMP_CLAUSE_BIND:
case OMP_CLAUSE_USE_DEVICE_PTR:
case OMP_CLAUSE_USE_DEVICE_ADDR:
case OMP_CLAUSE_NONTEMPORAL:
case OMP_CLAUSE_ASYNC:
case OMP_CLAUSE_WAIT:
case OMP_CLAUSE_NUM_GANGS:
case OMP_CLAUSE_NUM_WORKERS:
case OMP_CLAUSE_VECTOR_LENGTH:
case OMP_CLAUSE_GANG:
case OMP_CLAUSE_WORKER:
case OMP_CLAUSE_VECTOR:
case OMP_CLAUSE_INDEPENDENT:
case OMP_CLAUSE_AUTO:
case OMP_CLAUSE_SEQ:
case OMP_CLAUSE_TILE:
case OMP_CLAUSE__SIMT_:
case OMP_CLAUSE_IF_PRESENT:
case OMP_CLAUSE_FINALIZE:
case OMP_CLAUSE_FILTER:
case OMP_CLAUSE__CONDTEMP_:
break;
case OMP_CLAUSE__CACHE_:
case OMP_CLAUSE_NOHOST:
default:
gcc_unreachable ();
}
}
gcc_checking_assert (!scan_array_reductions
|| !is_gimple_omp_oacc (ctx->stmt));
if (scan_array_reductions)
{
for (c = clauses; c; c = OMP_CLAUSE_CHAIN (c))
if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION
|| OMP_CLAUSE_CODE (c) == OMP_CLAUSE_IN_REDUCTION
|| OMP_CLAUSE_CODE (c) == OMP_CLAUSE_TASK_REDUCTION)
&& OMP_CLAUSE_REDUCTION_PLACEHOLDER (c))
{
omp_context *rctx = ctx;
if (is_omp_target (ctx->stmt))
rctx = ctx->outer;
scan_omp (&OMP_CLAUSE_REDUCTION_GIMPLE_INIT (c), rctx);
scan_omp (&OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (c), rctx);
}
else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE
&& OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c))
scan_omp (&OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c), ctx);
else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR
&& OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c))
scan_omp (&OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c), ctx);
}
}
/* Create a new name for omp child function. Returns an identifier. */
static tree
create_omp_child_function_name (bool task_copy)
{
return clone_function_name_numbered (current_function_decl,
task_copy ? "_omp_cpyfn" : "_omp_fn");
}
/* Return true if CTX may belong to offloaded code: either if current function
is offloaded, or any enclosing context corresponds to a target region. */
static bool
omp_maybe_offloaded_ctx (omp_context *ctx)
{
if (cgraph_node::get (current_function_decl)->offloadable)
return true;
for (; ctx; ctx = ctx->outer)
if (is_gimple_omp_offloaded (ctx->stmt))
return true;
return false;
}
/* Build a decl for the omp child function. It'll not contain a body
yet, just the bare decl. */
static void
create_omp_child_function (omp_context *ctx, bool task_copy)
{
tree decl, type, name, t;
name = create_omp_child_function_name (task_copy);
if (task_copy)
type = build_function_type_list (void_type_node, ptr_type_node,
ptr_type_node, NULL_TREE);
else
type = build_function_type_list (void_type_node, ptr_type_node, NULL_TREE);
decl = build_decl (gimple_location (ctx->stmt), FUNCTION_DECL, name, type);
gcc_checking_assert (!is_gimple_omp_oacc (ctx->stmt)
|| !task_copy);
if (!task_copy)
ctx->cb.dst_fn = decl;
else
gimple_omp_task_set_copy_fn (ctx->stmt, decl);
TREE_STATIC (decl) = 1;
TREE_USED (decl) = 1;
DECL_ARTIFICIAL (decl) = 1;
DECL_IGNORED_P (decl) = 0;
TREE_PUBLIC (decl) = 0;
DECL_UNINLINABLE (decl) = 1;
DECL_EXTERNAL (decl) = 0;
DECL_CONTEXT (decl) = NULL_TREE;
DECL_INITIAL (decl) = make_node (BLOCK);
BLOCK_SUPERCONTEXT (DECL_INITIAL (decl)) = decl;
DECL_ATTRIBUTES (decl) = DECL_ATTRIBUTES (current_function_decl);
/* Remove omp declare simd attribute from the new attributes. */
if (tree a = lookup_attribute ("omp declare simd", DECL_ATTRIBUTES (decl)))
{
while (tree a2 = lookup_attribute ("omp declare simd", TREE_CHAIN (a)))
a = a2;
a = TREE_CHAIN (a);
for (tree *p = &DECL_ATTRIBUTES (decl); *p != a;)
if (is_attribute_p ("omp declare simd", get_attribute_name (*p)))
*p = TREE_CHAIN (*p);
else
{
tree chain = TREE_CHAIN (*p);
*p = copy_node (*p);
p = &TREE_CHAIN (*p);
*p = chain;
}
}
DECL_FUNCTION_SPECIFIC_OPTIMIZATION (decl)
= DECL_FUNCTION_SPECIFIC_OPTIMIZATION (current_function_decl);
DECL_FUNCTION_SPECIFIC_TARGET (decl)
= DECL_FUNCTION_SPECIFIC_TARGET (current_function_decl);
DECL_FUNCTION_VERSIONED (decl)
= DECL_FUNCTION_VERSIONED (current_function_decl);
if (omp_maybe_offloaded_ctx (ctx))
{
cgraph_node::get_create (decl)->offloadable = 1;
if (ENABLE_OFFLOADING)
g->have_offload = true;
}
if (cgraph_node::get_create (decl)->offloadable)
{
const char *target_attr = (is_gimple_omp_offloaded (ctx->stmt)
? "omp target entrypoint"
: "omp declare target");
if (lookup_attribute ("omp declare target",
DECL_ATTRIBUTES (current_function_decl)))
{
if (is_gimple_omp_offloaded (ctx->stmt))
DECL_ATTRIBUTES (decl)
= remove_attribute ("omp declare target",
copy_list (DECL_ATTRIBUTES (decl)));
else
target_attr = NULL;
}
if (target_attr)
DECL_ATTRIBUTES (decl)
= tree_cons (get_identifier (target_attr),
NULL_TREE, DECL_ATTRIBUTES (decl));
}
t = build_decl (DECL_SOURCE_LOCATION (decl),
RESULT_DECL, NULL_TREE, void_type_node);
DECL_ARTIFICIAL (t) = 1;
DECL_IGNORED_P (t) = 1;
DECL_CONTEXT (t) = decl;
DECL_RESULT (decl) = t;
tree data_name = get_identifier (".omp_data_i");
t = build_decl (DECL_SOURCE_LOCATION (decl), PARM_DECL, data_name,
ptr_type_node);
DECL_ARTIFICIAL (t) = 1;
DECL_NAMELESS (t) = 1;
DECL_ARG_TYPE (t) = ptr_type_node;
DECL_CONTEXT (t) = current_function_decl;
TREE_USED (t) = 1;
TREE_READONLY (t) = 1;
DECL_ARGUMENTS (decl) = t;
if (!task_copy)
ctx->receiver_decl = t;
else
{
t = build_decl (DECL_SOURCE_LOCATION (decl),
PARM_DECL, get_identifier (".omp_data_o"),
ptr_type_node);
DECL_ARTIFICIAL (t) = 1;
DECL_NAMELESS (t) = 1;
DECL_ARG_TYPE (t) = ptr_type_node;
DECL_CONTEXT (t) = current_function_decl;
TREE_USED (t) = 1;
TREE_ADDRESSABLE (t) = 1;
DECL_CHAIN (t) = DECL_ARGUMENTS (decl);
DECL_ARGUMENTS (decl) = t;
}
/* Allocate memory for the function structure. The call to
allocate_struct_function clobbers CFUN, so we need to restore
it afterward. */
push_struct_function (decl);
cfun->function_end_locus = gimple_location (ctx->stmt);
init_tree_ssa (cfun);
pop_cfun ();
}
/* Callback for walk_gimple_seq. Check if combined parallel
contains gimple_omp_for_combined_into_p OMP_FOR. */
tree
omp_find_combined_for (gimple_stmt_iterator *gsi_p,
bool *handled_ops_p,
struct walk_stmt_info *wi)
{
gimple *stmt = gsi_stmt (*gsi_p);
*handled_ops_p = true;
switch (gimple_code (stmt))
{
WALK_SUBSTMTS;
case GIMPLE_OMP_FOR:
if (gimple_omp_for_combined_into_p (stmt)
&& gimple_omp_for_kind (stmt)
== *(const enum gf_mask *) (wi->info))
{
wi->info = stmt;
return integer_zero_node;
}
break;
default:
break;
}
return NULL;
}
/* Add _LOOPTEMP_/_REDUCTEMP_ clauses on OpenMP parallel or task. */
static void
add_taskreg_looptemp_clauses (enum gf_mask msk, gimple *stmt,
omp_context *outer_ctx)
{
struct walk_stmt_info wi;
memset (&wi, 0, sizeof (wi));
wi.val_only = true;
wi.info = (void *) &msk;
walk_gimple_seq (gimple_omp_body (stmt), omp_find_combined_for, NULL, &wi);
if (wi.info != (void *) &msk)
{
gomp_for *for_stmt = as_a <gomp_for *> ((gimple *) wi.info);
struct omp_for_data fd;
omp_extract_for_data (for_stmt, &fd, NULL);
/* We need two temporaries with fd.loop.v type (istart/iend)
and then (fd.collapse - 1) temporaries with the same
type for count2 ... countN-1 vars if not constant. */
size_t count = 2, i;
tree type = fd.iter_type;
if (fd.collapse > 1
&& TREE_CODE (fd.loop.n2) != INTEGER_CST)
{
count += fd.collapse - 1;
/* If there are lastprivate clauses on the inner
GIMPLE_OMP_FOR, add one more temporaries for the total number
of iterations (product of count1 ... countN-1). */
if (omp_find_clause (gimple_omp_for_clauses (for_stmt),
OMP_CLAUSE_LASTPRIVATE)
|| (msk == GF_OMP_FOR_KIND_FOR
&& omp_find_clause (gimple_omp_parallel_clauses (stmt),
OMP_CLAUSE_LASTPRIVATE)))
{
tree temp = create_tmp_var (type);
tree c = build_omp_clause (UNKNOWN_LOCATION,
OMP_CLAUSE__LOOPTEMP_);
insert_decl_map (&outer_ctx->cb, temp, temp);
OMP_CLAUSE_DECL (c) = temp;
OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt);
gimple_omp_taskreg_set_clauses (stmt, c);
}
if (fd.non_rect
&& fd.last_nonrect == fd.first_nonrect + 1)
if (tree v = gimple_omp_for_index (for_stmt, fd.last_nonrect))
if (!TYPE_UNSIGNED (TREE_TYPE (v)))
{
v = gimple_omp_for_index (for_stmt, fd.first_nonrect);
tree type2 = TREE_TYPE (v);
count++;
for (i = 0; i < 3; i++)
{
tree temp = create_tmp_var (type2);
tree c = build_omp_clause (UNKNOWN_LOCATION,
OMP_CLAUSE__LOOPTEMP_);
insert_decl_map (&outer_ctx->cb, temp, temp);
OMP_CLAUSE_DECL (c) = temp;
OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt);
gimple_omp_taskreg_set_clauses (stmt, c);
}
}
}
for (i = 0; i < count; i++)
{
tree temp = create_tmp_var (type);
tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE__LOOPTEMP_);
insert_decl_map (&outer_ctx->cb, temp, temp);
OMP_CLAUSE_DECL (c) = temp;
OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt);
gimple_omp_taskreg_set_clauses (stmt, c);
}
}
if (msk == GF_OMP_FOR_KIND_TASKLOOP
&& omp_find_clause (gimple_omp_task_clauses (stmt),
OMP_CLAUSE_REDUCTION))
{
tree type = build_pointer_type (pointer_sized_int_node);
tree temp = create_tmp_var (type);
tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE__REDUCTEMP_);
insert_decl_map (&outer_ctx->cb, temp, temp);
OMP_CLAUSE_DECL (c) = temp;
OMP_CLAUSE_CHAIN (c) = gimple_omp_task_clauses (stmt);
gimple_omp_task_set_clauses (stmt, c);
}
}
/* Scan an OpenMP parallel directive. */
static void
scan_omp_parallel (gimple_stmt_iterator *gsi, omp_context *outer_ctx)
{
omp_context *ctx;
tree name;
gomp_parallel *stmt = as_a <gomp_parallel *> (gsi_stmt (*gsi));
/* Ignore parallel directives with empty bodies, unless there
are copyin clauses. */
if (optimize > 0
&& empty_body_p (gimple_omp_body (stmt))
&& omp_find_clause (gimple_omp_parallel_clauses (stmt),
OMP_CLAUSE_COPYIN) == NULL)
{
gsi_replace (gsi, gimple_build_nop (), false);
return;
}
if (gimple_omp_parallel_combined_p (stmt))
add_taskreg_looptemp_clauses (GF_OMP_FOR_KIND_FOR, stmt, outer_ctx);
for (tree c = omp_find_clause (gimple_omp_parallel_clauses (stmt),
OMP_CLAUSE_REDUCTION);
c; c = omp_find_clause (OMP_CLAUSE_CHAIN (c), OMP_CLAUSE_REDUCTION))
if (OMP_CLAUSE_REDUCTION_TASK (c))
{
tree type = build_pointer_type (pointer_sized_int_node);
tree temp = create_tmp_var (type);
tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE__REDUCTEMP_);
if (outer_ctx)
insert_decl_map (&outer_ctx->cb, temp, temp);
OMP_CLAUSE_DECL (c) = temp;
OMP_CLAUSE_CHAIN (c) = gimple_omp_parallel_clauses (stmt);
gimple_omp_parallel_set_clauses (stmt, c);
break;
}
else if (OMP_CLAUSE_CHAIN (c) == NULL_TREE)
break;
ctx = new_omp_context (stmt, outer_ctx);
taskreg_contexts.safe_push (ctx);
if (taskreg_nesting_level > 1)
ctx->is_nested = true;
ctx->field_map = splay_tree_new (splay_tree_compare_pointers, 0, 0);
ctx->record_type = lang_hooks.types.make_type (RECORD_TYPE);
name = create_tmp_var_name (".omp_data_s");
name = build_decl (gimple_location (stmt),
TYPE_DECL, name, ctx->record_type);
DECL_ARTIFICIAL (name) = 1;
DECL_NAMELESS (name) = 1;
TYPE_NAME (ctx->record_type) = name;
TYPE_ARTIFICIAL (ctx->record_type) = 1;
create_omp_child_function (ctx, false);
gimple_omp_parallel_set_child_fn (stmt, ctx->cb.dst_fn);
scan_sharing_clauses (gimple_omp_parallel_clauses (stmt), ctx);
scan_omp (gimple_omp_body_ptr (stmt), ctx);
if (TYPE_FIELDS (ctx->record_type) == NULL)
ctx->record_type = ctx->receiver_decl = NULL;
}
/* Scan an OpenMP task directive. */
static void
scan_omp_task (gimple_stmt_iterator *gsi, omp_context *outer_ctx)
{
omp_context *ctx;
tree name, t;
gomp_task *stmt = as_a <gomp_task *> (gsi_stmt (*gsi));
/* Ignore task directives with empty bodies, unless they have depend
clause. */
if (optimize > 0
&& gimple_omp_body (stmt)
&& empty_body_p (gimple_omp_body (stmt))
&& !omp_find_clause (gimple_omp_task_clauses (stmt), OMP_CLAUSE_DEPEND))
{
gsi_replace (gsi, gimple_build_nop (), false);
return;
}
if (gimple_omp_task_taskloop_p (stmt))
add_taskreg_looptemp_clauses (GF_OMP_FOR_KIND_TASKLOOP, stmt, outer_ctx);
ctx = new_omp_context (stmt, outer_ctx);
if (gimple_omp_task_taskwait_p (stmt))
{
scan_sharing_clauses (gimple_omp_task_clauses (stmt), ctx);
return;
}
taskreg_contexts.safe_push (ctx);
if (taskreg_nesting_level > 1)
ctx->is_nested = true;
ctx->field_map = splay_tree_new (splay_tree_compare_pointers, 0, 0);
ctx->record_type = lang_hooks.types.make_type (RECORD_TYPE);
name = create_tmp_var_name (".omp_data_s");
name = build_decl (gimple_location (stmt),
TYPE_DECL, name, ctx->record_type);
DECL_ARTIFICIAL (name) = 1;
DECL_NAMELESS (name) = 1;
TYPE_NAME (ctx->record_type) = name;
TYPE_ARTIFICIAL (ctx->record_type) = 1;
create_omp_child_function (ctx, false);
gimple_omp_task_set_child_fn (stmt, ctx->cb.dst_fn);
scan_sharing_clauses (gimple_omp_task_clauses (stmt), ctx);
if (ctx->srecord_type)
{
name = create_tmp_var_name (".omp_data_a");
name = build_decl (gimple_location (stmt),
TYPE_DECL, name, ctx->srecord_type);
DECL_ARTIFICIAL (name) = 1;
DECL_NAMELESS (name) = 1;
TYPE_NAME (ctx->srecord_type) = name;
TYPE_ARTIFICIAL (ctx->srecord_type) = 1;
create_omp_child_function (ctx, true);
}
scan_omp (gimple_omp_body_ptr (stmt), ctx);
if (TYPE_FIELDS (ctx->record_type) == NULL)
{
ctx->record_type = ctx->receiver_decl = NULL;
t = build_int_cst (long_integer_type_node, 0);
gimple_omp_task_set_arg_size (stmt, t);
t = build_int_cst (long_integer_type_node, 1);
gimple_omp_task_set_arg_align (stmt, t);
}
}
/* Helper function for finish_taskreg_scan, called through walk_tree.
If maybe_lookup_decl_in_outer_context returns non-NULL for some
tree, replace it in the expression. */
static tree
finish_taskreg_remap (tree *tp, int *walk_subtrees, void *data)
{
if (VAR_P (*tp))
{
omp_context *ctx = (omp_context *) data;
tree t = maybe_lookup_decl_in_outer_ctx (*tp, ctx);
if (t != *tp)
{
if (DECL_HAS_VALUE_EXPR_P (t))
t = unshare_expr (DECL_VALUE_EXPR (t));
*tp = t;
}
*walk_subtrees = 0;
}
else if (IS_TYPE_OR_DECL_P (*tp))
*walk_subtrees = 0;
return NULL_TREE;
}
/* If any decls have been made addressable during scan_omp,
adjust their fields if needed, and layout record types
of parallel/task constructs. */
static void
finish_taskreg_scan (omp_context *ctx)
{
if (ctx->record_type == NULL_TREE)
return;
/* If any task_shared_vars were needed, verify all
OMP_CLAUSE_SHARED clauses on GIMPLE_OMP_{PARALLEL,TASK,TEAMS}
statements if use_pointer_for_field hasn't changed
because of that. If it did, update field types now. */
if (task_shared_vars)
{
tree c;
for (c = gimple_omp_taskreg_clauses (ctx->stmt);
c; c = OMP_CLAUSE_CHAIN (c))
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED
&& !OMP_CLAUSE_SHARED_FIRSTPRIVATE (c))
{
tree decl = OMP_CLAUSE_DECL (c);
/* Global variables don't need to be copied,
the receiver side will use them directly. */
if (is_global_var (maybe_lookup_decl_in_outer_ctx (decl, ctx)))
continue;
if (!bitmap_bit_p (task_shared_vars, DECL_UID (decl))
|| !use_pointer_for_field (decl, ctx))
continue;
tree field = lookup_field (decl, ctx);
if (TREE_CODE (TREE_TYPE (field)) == POINTER_TYPE
&& TREE_TYPE (TREE_TYPE (field)) == TREE_TYPE (decl))
continue;
TREE_TYPE (field) = build_pointer_type (TREE_TYPE (decl));
TREE_THIS_VOLATILE (field) = 0;
DECL_USER_ALIGN (field) = 0;
SET_DECL_ALIGN (field, TYPE_ALIGN (TREE_TYPE (field)));
if (TYPE_ALIGN (ctx->record_type) < DECL_ALIGN (field))
SET_TYPE_ALIGN (ctx->record_type, DECL_ALIGN (field));
if (ctx->srecord_type)
{
tree sfield = lookup_sfield (decl, ctx);
TREE_TYPE (sfield) = TREE_TYPE (field);
TREE_THIS_VOLATILE (sfield) = 0;
DECL_USER_ALIGN (sfield) = 0;
SET_DECL_ALIGN (sfield, DECL_ALIGN (field));
if (TYPE_ALIGN (ctx->srecord_type) < DECL_ALIGN (sfield))
SET_TYPE_ALIGN (ctx->srecord_type, DECL_ALIGN (sfield));
}
}
}
if (gimple_code (ctx->stmt) == GIMPLE_OMP_PARALLEL)
{
tree clauses = gimple_omp_parallel_clauses (ctx->stmt);
tree c = omp_find_clause (clauses, OMP_CLAUSE__REDUCTEMP_);
if (c)
{
/* Move the _reductemp_ clause first. GOMP_parallel_reductions
expects to find it at the start of data. */
tree f = lookup_field (OMP_CLAUSE_DECL (c), ctx);
tree *p = &TYPE_FIELDS (ctx->record_type);
while (*p)
if (*p == f)
{
*p = DECL_CHAIN (*p);
break;
}
else
p = &DECL_CHAIN (*p);
DECL_CHAIN (f) = TYPE_FIELDS (ctx->record_type);
TYPE_FIELDS (ctx->record_type) = f;
}
layout_type (ctx->record_type);
fixup_child_record_type (ctx);
}
else if (gimple_code (ctx->stmt) == GIMPLE_OMP_TEAMS)
{
layout_type (ctx->record_type);
fixup_child_record_type (ctx);
}
else
{
location_t loc = gimple_location (ctx->stmt);
tree *p, vla_fields = NULL_TREE, *q = &vla_fields;
tree detach_clause
= omp_find_clause (gimple_omp_task_clauses (ctx->stmt),
OMP_CLAUSE_DETACH);
/* Move VLA fields to the end. */
p = &TYPE_FIELDS (ctx->record_type);
while (*p)
if (!TYPE_SIZE_UNIT (TREE_TYPE (*p))
|| ! TREE_CONSTANT (TYPE_SIZE_UNIT (TREE_TYPE (*p))))
{
*q = *p;
*p = TREE_CHAIN (*p);
TREE_CHAIN (*q) = NULL_TREE;
q = &TREE_CHAIN (*q);
}
else
p = &DECL_CHAIN (*p);
*p = vla_fields;
if (gimple_omp_task_taskloop_p (ctx->stmt))
{
/* Move fields corresponding to first and second _looptemp_
clause first. There are filled by GOMP_taskloop
and thus need to be in specific positions. */
tree clauses = gimple_omp_task_clauses (ctx->stmt);
tree c1 = omp_find_clause (clauses, OMP_CLAUSE__LOOPTEMP_);
tree c2 = omp_find_clause (OMP_CLAUSE_CHAIN (c1),
OMP_CLAUSE__LOOPTEMP_);
tree c3 = omp_find_clause (clauses, OMP_CLAUSE__REDUCTEMP_);
tree f1 = lookup_field (OMP_CLAUSE_DECL (c1), ctx);
tree f2 = lookup_field (OMP_CLAUSE_DECL (c2), ctx);
tree f3 = c3 ? lookup_field (OMP_CLAUSE_DECL (c3), ctx) : NULL_TREE;
p = &TYPE_FIELDS (ctx->record_type);
while (*p)
if (*p == f1 || *p == f2 || *p == f3)
*p = DECL_CHAIN (*p);
else
p = &DECL_CHAIN (*p);
DECL_CHAIN (f1) = f2;
if (c3)
{
DECL_CHAIN (f2) = f3;
DECL_CHAIN (f3) = TYPE_FIELDS (ctx->record_type);
}
else
DECL_CHAIN (f2) = TYPE_FIELDS (ctx->record_type);
TYPE_FIELDS (ctx->record_type) = f1;
if (ctx->srecord_type)
{
f1 = lookup_sfield (OMP_CLAUSE_DECL (c1), ctx);
f2 = lookup_sfield (OMP_CLAUSE_DECL (c2), ctx);
if (c3)
f3 = lookup_sfield (OMP_CLAUSE_DECL (c3), ctx);
p = &TYPE_FIELDS (ctx->srecord_type);
while (*p)
if (*p == f1 || *p == f2 || *p == f3)
*p = DECL_CHAIN (*p);
else
p = &DECL_CHAIN (*p);
DECL_CHAIN (f1) = f2;
DECL_CHAIN (f2) = TYPE_FIELDS (ctx->srecord_type);
if (c3)
{
DECL_CHAIN (f2) = f3;
DECL_CHAIN (f3) = TYPE_FIELDS (ctx->srecord_type);
}
else
DECL_CHAIN (f2) = TYPE_FIELDS (ctx->srecord_type);
TYPE_FIELDS (ctx->srecord_type) = f1;
}
}
if (detach_clause)
{
tree c, field;
/* Look for a firstprivate clause with the detach event handle. */
for (c = gimple_omp_taskreg_clauses (ctx->stmt);
c; c = OMP_CLAUSE_CHAIN (c))
{
if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_FIRSTPRIVATE)
continue;
if (maybe_lookup_decl_in_outer_ctx (OMP_CLAUSE_DECL (c), ctx)
== OMP_CLAUSE_DECL (detach_clause))
break;
}
gcc_assert (c);
field = lookup_field (OMP_CLAUSE_DECL (c), ctx);
/* Move field corresponding to the detach clause first.
This is filled by GOMP_task and needs to be in a
specific position. */
p = &TYPE_FIELDS (ctx->record_type);
while (*p)
if (*p == field)
*p = DECL_CHAIN (*p);
else
p = &DECL_CHAIN (*p);
DECL_CHAIN (field) = TYPE_FIELDS (ctx->record_type);
TYPE_FIELDS (ctx->record_type) = field;
if (ctx->srecord_type)
{
field = lookup_sfield (OMP_CLAUSE_DECL (c), ctx);
p = &TYPE_FIELDS (ctx->srecord_type);
while (*p)
if (*p == field)
*p = DECL_CHAIN (*p);
else
p = &DECL_CHAIN (*p);
DECL_CHAIN (field) = TYPE_FIELDS (ctx->srecord_type);
TYPE_FIELDS (ctx->srecord_type) = field;
}
}
layout_type (ctx->record_type);
fixup_child_record_type (ctx);
if (ctx->srecord_type)
layout_type (ctx->srecord_type);
tree t = fold_convert_loc (loc, long_integer_type_node,
TYPE_SIZE_UNIT (ctx->record_type));
if (TREE_CODE (t) != INTEGER_CST)
{
t = unshare_expr (t);
walk_tree (&t, finish_taskreg_remap, ctx, NULL);
}
gimple_omp_task_set_arg_size (ctx->stmt, t);
t = build_int_cst (long_integer_type_node,
TYPE_ALIGN_UNIT (ctx->record_type));
gimple_omp_task_set_arg_align (ctx->stmt, t);
}
}
/* Find the enclosing offload context. */
static omp_context *
enclosing_target_ctx (omp_context *ctx)
{
for (; ctx; ctx = ctx->outer)
if (gimple_code (ctx->stmt) == GIMPLE_OMP_TARGET)
break;
return ctx;
}
/* Return whether CTX's parent compute construct is an OpenACC 'kernels'
construct.
(This doesn't include OpenACC 'kernels' decomposed parts.) */
static bool
ctx_in_oacc_kernels_region (omp_context *ctx)
{
for (;ctx != NULL; ctx = ctx->outer)
{
gimple *stmt = ctx->stmt;
if (gimple_code (stmt) == GIMPLE_OMP_TARGET
&& gimple_omp_target_kind (stmt) == GF_OMP_TARGET_KIND_OACC_KERNELS)
return true;
}
return false;
}
/* Check the parallelism clauses inside a OpenACC 'kernels' region.
(This doesn't include OpenACC 'kernels' decomposed parts.)
Until kernels handling moves to use the same loop indirection
scheme as parallel, we need to do this checking early. */
static unsigned
check_oacc_kernel_gwv (gomp_for *stmt, omp_context *ctx)
{
bool checking = true;
unsigned outer_mask = 0;
unsigned this_mask = 0;
bool has_seq = false, has_auto = false;
if (ctx->outer)
outer_mask = check_oacc_kernel_gwv (NULL, ctx->outer);
if (!stmt)
{
checking = false;
if (gimple_code (ctx->stmt) != GIMPLE_OMP_FOR)
return outer_mask;
stmt = as_a <gomp_for *> (ctx->stmt);
}
for (tree c = gimple_omp_for_clauses (stmt); c; c = OMP_CLAUSE_CHAIN (c))
{
switch (OMP_CLAUSE_CODE (c))
{
case OMP_CLAUSE_GANG:
this_mask |= GOMP_DIM_MASK (GOMP_DIM_GANG);
break;
case OMP_CLAUSE_WORKER:
this_mask |= GOMP_DIM_MASK (GOMP_DIM_WORKER);
break;
case OMP_CLAUSE_VECTOR:
this_mask |= GOMP_DIM_MASK (GOMP_DIM_VECTOR);
break;
case OMP_CLAUSE_SEQ:
has_seq = true;
break;
case OMP_CLAUSE_AUTO:
has_auto = true;
break;
default:
break;
}
}
if (checking)
{
if (has_seq && (this_mask || has_auto))
error_at (gimple_location (stmt), "%<seq%> overrides other"
" OpenACC loop specifiers");
else if (has_auto && this_mask)
error_at (gimple_location (stmt), "%<auto%> conflicts with other"
" OpenACC loop specifiers");
if (this_mask & outer_mask)
error_at (gimple_location (stmt), "inner loop uses same"
" OpenACC parallelism as containing loop");
}
return outer_mask | this_mask;
}
/* Scan a GIMPLE_OMP_FOR. */
static omp_context *
scan_omp_for (gomp_for *stmt, omp_context *outer_ctx)
{
omp_context *ctx;
size_t i;
tree clauses = gimple_omp_for_clauses (stmt);
ctx = new_omp_context (stmt, outer_ctx);
if (is_gimple_omp_oacc (stmt))
{
omp_context *tgt = enclosing_target_ctx (outer_ctx);
if (!(tgt && is_oacc_kernels (tgt)))
for (tree c = clauses; c; c = OMP_CLAUSE_CHAIN (c))
{
tree c_op0;
switch (OMP_CLAUSE_CODE (c))
{
case OMP_CLAUSE_GANG:
c_op0 = OMP_CLAUSE_GANG_EXPR (c);
break;
case OMP_CLAUSE_WORKER:
c_op0 = OMP_CLAUSE_WORKER_EXPR (c);
break;
case OMP_CLAUSE_VECTOR:
c_op0 = OMP_CLAUSE_VECTOR_EXPR (c);
break;
default:
continue;
}
if (c_op0)
{
/* By construction, this is impossible for OpenACC 'kernels'
decomposed parts. */
gcc_assert (!(tgt && is_oacc_kernels_decomposed_part (tgt)));
error_at (OMP_CLAUSE_LOCATION (c),
"argument not permitted on %qs clause",
omp_clause_code_name[OMP_CLAUSE_CODE (c)]);
if (tgt)
inform (gimple_location (tgt->stmt),
"enclosing parent compute construct");
else if (oacc_get_fn_attrib (current_function_decl))
inform (DECL_SOURCE_LOCATION (current_function_decl),
"enclosing routine");
else
gcc_unreachable ();
}
}
if (tgt && is_oacc_kernels (tgt))
check_oacc_kernel_gwv (stmt, ctx);
/* Collect all variables named in reductions on this loop. Ensure
that, if this loop has a reduction on some variable v, and there is
a reduction on v somewhere in an outer context, then there is a
reduction on v on all intervening loops as well. */
tree local_reduction_clauses = NULL;
for (tree c = gimple_omp_for_clauses (stmt); c; c = OMP_CLAUSE_CHAIN (c))
{
if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION)
local_reduction_clauses
= tree_cons (NULL, c, local_reduction_clauses);
}
if (ctx->outer_reduction_clauses == NULL && ctx->outer != NULL)
ctx->outer_reduction_clauses
= chainon (unshare_expr (ctx->outer->local_reduction_clauses),
ctx->outer->outer_reduction_clauses);
tree outer_reduction_clauses = ctx->outer_reduction_clauses;
tree local_iter = local_reduction_clauses;
for (; local_iter; local_iter = TREE_CHAIN (local_iter))
{
tree local_clause = TREE_VALUE (local_iter);
tree local_var = OMP_CLAUSE_DECL (local_clause);
tree_code local_op = OMP_CLAUSE_REDUCTION_CODE (local_clause);
bool have_outer_reduction = false;
tree ctx_iter = outer_reduction_clauses;
for (; ctx_iter; ctx_iter = TREE_CHAIN (ctx_iter))
{
tree outer_clause = TREE_VALUE (ctx_iter);
tree outer_var = OMP_CLAUSE_DECL (outer_clause);
tree_code outer_op = OMP_CLAUSE_REDUCTION_CODE (outer_clause);
if (outer_var == local_var && outer_op != local_op)
{
warning_at (OMP_CLAUSE_LOCATION (local_clause), 0,
"conflicting reduction operations for %qE",
local_var);
inform (OMP_CLAUSE_LOCATION (outer_clause),
"location of the previous reduction for %qE",
outer_var);
}
if (outer_var == local_var)
{
have_outer_reduction = true;
break;
}
}
if (have_outer_reduction)
{
/* There is a reduction on outer_var both on this loop and on
some enclosing loop. Walk up the context tree until such a
loop with a reduction on outer_var is found, and complain
about all intervening loops that do not have such a
reduction. */
struct omp_context *curr_loop = ctx->outer;
bool found = false;
while (curr_loop != NULL)
{
tree curr_iter = curr_loop->local_reduction_clauses;
for (; curr_iter; curr_iter = TREE_CHAIN (curr_iter))
{
tree curr_clause = TREE_VALUE (curr_iter);
tree curr_var = OMP_CLAUSE_DECL (curr_clause);
if (curr_var == local_var)
{
found = true;
break;
}
}
if (!found)
warning_at (gimple_location (curr_loop->stmt), 0,
"nested loop in reduction needs "
"reduction clause for %qE",
local_var);
else
break;
curr_loop = curr_loop->outer;
}
}
}
ctx->local_reduction_clauses = local_reduction_clauses;
ctx->outer_reduction_clauses
= chainon (unshare_expr (ctx->local_reduction_clauses),
ctx->outer_reduction_clauses);
if (tgt && is_oacc_kernels (tgt))
{
/* Strip out reductions, as they are not handled yet. */
tree *prev_ptr = &clauses;
while (tree probe = *prev_ptr)
{
tree *next_ptr = &OMP_CLAUSE_CHAIN (probe);
if (OMP_CLAUSE_CODE (probe) == OMP_CLAUSE_REDUCTION)
*prev_ptr = *next_ptr;
else
prev_ptr = next_ptr;
}
gimple_omp_for_set_clauses (stmt, clauses);
}
}
scan_sharing_clauses (clauses, ctx);
scan_omp (gimple_omp_for_pre_body_ptr (stmt), ctx);
for (i = 0; i < gimple_omp_for_collapse (stmt); i++)
{
scan_omp_op (gimple_omp_for_index_ptr (stmt, i), ctx);
scan_omp_op (gimple_omp_for_initial_ptr (stmt, i), ctx);
scan_omp_op (gimple_omp_for_final_ptr (stmt, i), ctx);
scan_omp_op (gimple_omp_for_incr_ptr (stmt, i), ctx);
}
scan_omp (gimple_omp_body_ptr (stmt), ctx);
return ctx;
}
/* Duplicate #pragma omp simd, one for SIMT, another one for SIMD. */
static void
scan_omp_simd (gimple_stmt_iterator *gsi, gomp_for *stmt,
omp_context *outer_ctx)
{
gbind *bind = gimple_build_bind (NULL, NULL, NULL);
gsi_replace (gsi, bind, false);
gimple_seq seq = NULL;
gimple *g = gimple_build_call_internal (IFN_GOMP_USE_SIMT, 0);
tree cond = create_tmp_var_raw (integer_type_node);
DECL_CONTEXT (cond) = current_function_decl;
DECL_SEEN_IN_BIND_EXPR_P (cond) = 1;
gimple_bind_set_vars (bind, cond);
gimple_call_set_lhs (g, cond);
gimple_seq_add_stmt (&seq, g);
tree lab1 = create_artificial_label (UNKNOWN_LOCATION);
tree lab2 = create_artificial_label (UNKNOWN_LOCATION);
tree lab3 = create_artificial_label (UNKNOWN_LOCATION);
g = gimple_build_cond (NE_EXPR, cond, integer_zero_node, lab1, lab2);
gimple_seq_add_stmt (&seq, g);
g = gimple_build_label (lab1);
gimple_seq_add_stmt (&seq, g);
gimple_seq new_seq = copy_gimple_seq_and_replace_locals (stmt);
gomp_for *new_stmt = as_a <gomp_for *> (new_seq);
tree clause = build_omp_clause (gimple_location (stmt), OMP_CLAUSE__SIMT_);
OMP_CLAUSE_CHAIN (clause) = gimple_omp_for_clauses (new_stmt);
gimple_omp_for_set_clauses (new_stmt, clause);
gimple_seq_add_stmt (&seq, new_stmt);
g = gimple_build_goto (lab3);
gimple_seq_add_stmt (&seq, g);
g = gimple_build_label (lab2);
gimple_seq_add_stmt (&seq, g);
gimple_seq_add_stmt (&seq, stmt);
g = gimple_build_label (lab3);
gimple_seq_add_stmt (&seq, g);
gimple_bind_set_body (bind, seq);
update_stmt (bind);
scan_omp_for (new_stmt, outer_ctx);
scan_omp_for (stmt, outer_ctx)->simt_stmt = new_stmt;
}
static tree omp_find_scan (gimple_stmt_iterator *, bool *,
struct walk_stmt_info *);
static omp_context *maybe_lookup_ctx (gimple *);
/* Duplicate #pragma omp simd, one for the scan input phase loop and one
for scan phase loop. */
static void
scan_omp_simd_scan (gimple_stmt_iterator *gsi, gomp_for *stmt,
omp_context *outer_ctx)
{
/* The only change between inclusive and exclusive scan will be
within the first simd loop, so just use inclusive in the
worksharing loop. */
outer_ctx->scan_inclusive = true;
tree c = build_omp_clause (UNKNOWN_LOCATION, OMP_CLAUSE_INCLUSIVE);
OMP_CLAUSE_DECL (c) = integer_zero_node;
gomp_scan *input_stmt = gimple_build_omp_scan (NULL, NULL_TREE);
gomp_scan *scan_stmt = gimple_build_omp_scan (NULL, c);
gsi_replace (gsi, input_stmt, false);
gimple_seq input_body = NULL;
gimple_seq_add_stmt (&input_body, stmt);
gsi_insert_after (gsi, scan_stmt, GSI_NEW_STMT);
gimple_stmt_iterator input1_gsi = gsi_none ();
struct walk_stmt_info wi;
memset (&wi, 0, sizeof (wi));
wi.val_only = true;
wi.info = (void *) &input1_gsi;
walk_gimple_seq_mod (gimple_omp_body_ptr (stmt), omp_find_scan, NULL, &wi);
gcc_assert (!gsi_end_p (input1_gsi));
gimple *input_stmt1 = gsi_stmt (input1_gsi);
gsi_next (&input1_gsi);
gimple *scan_stmt1 = gsi_stmt (input1_gsi);
gcc_assert (scan_stmt1 && gimple_code (scan_stmt1) == GIMPLE_OMP_SCAN);
c = gimple_omp_scan_clauses (as_a <gomp_scan *> (scan_stmt1));
if (c && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_EXCLUSIVE)
std::swap (input_stmt1, scan_stmt1);
gimple_seq input_body1 = gimple_omp_body (input_stmt1);
gimple_omp_set_body (input_stmt1, NULL);
gimple_seq scan_body = copy_gimple_seq_and_replace_locals (stmt);
gomp_for *new_stmt = as_a <gomp_for *> (scan_body);
gimple_omp_set_body (input_stmt1, input_body1);
gimple_omp_set_body (scan_stmt1, NULL);
gimple_stmt_iterator input2_gsi = gsi_none ();
memset (&wi, 0, sizeof (wi));
wi.val_only = true;
wi.info = (void *) &input2_gsi;
walk_gimple_seq_mod (gimple_omp_body_ptr (new_stmt), omp_find_scan,
NULL, &wi);
gcc_assert (!gsi_end_p (input2_gsi));
gimple *input_stmt2 = gsi_stmt (input2_gsi);
gsi_next (&input2_gsi);
gimple *scan_stmt2 = gsi_stmt (input2_gsi);
gcc_assert (scan_stmt2 && gimple_code (scan_stmt2) == GIMPLE_OMP_SCAN);
if (c && OMP_CLAUSE_CODE (c) == OMP_CLAUSE_EXCLUSIVE)
std::swap (input_stmt2, scan_stmt2);
gimple_omp_set_body (input_stmt2, NULL);
gimple_omp_set_body (input_stmt, input_body);
gimple_omp_set_body (scan_stmt, scan_body);
omp_context *ctx = new_omp_context (input_stmt, outer_ctx);
scan_omp (gimple_omp_body_ptr (input_stmt), ctx);
ctx = new_omp_context (scan_stmt, outer_ctx);
scan_omp (gimple_omp_body_ptr (scan_stmt), ctx);
maybe_lookup_ctx (new_stmt)->for_simd_scan_phase = true;
}
/* Scan an OpenMP sections directive. */
static void
scan_omp_sections (gomp_sections *stmt, omp_context *outer_ctx)
{
omp_context *ctx;
ctx = new_omp_context (stmt, outer_ctx);
scan_sharing_clauses (gimple_omp_sections_clauses (stmt), ctx);
scan_omp (gimple_omp_body_ptr (stmt), ctx);
}
/* Scan an OpenMP single directive. */
static void
scan_omp_single (gomp_single *stmt, omp_context *outer_ctx)
{
omp_context *ctx;
tree name;
ctx = new_omp_context (stmt, outer_ctx);
ctx->field_map = splay_tree_new (splay_tree_compare_pointers, 0, 0);
ctx->record_type = lang_hooks.types.make_type (RECORD_TYPE);
name = create_tmp_var_name (".omp_copy_s");
name = build_decl (gimple_location (stmt),
TYPE_DECL, name, ctx->record_type);
TYPE_NAME (ctx->record_type) = name;
scan_sharing_clauses (gimple_omp_single_clauses (stmt), ctx);
scan_omp (gimple_omp_body_ptr (stmt), ctx);
if (TYPE_FIELDS (ctx->record_type) == NULL)
ctx->record_type = NULL;
else
layout_type (ctx->record_type);
}
/* Scan a GIMPLE_OMP_TARGET. */
static void
scan_omp_target (gomp_target *stmt, omp_context *outer_ctx)
{
omp_context *ctx;
tree name;
bool offloaded = is_gimple_omp_offloaded (stmt);
tree clauses = gimple_omp_target_clauses (stmt);
ctx = new_omp_context (stmt, outer_ctx);
ctx->field_map = splay_tree_new (splay_tree_compare_pointers, 0, 0);
ctx->record_type = lang_hooks.types.make_type (RECORD_TYPE);
name = create_tmp_var_name (".omp_data_t");
name = build_decl (gimple_location (stmt),
TYPE_DECL, name, ctx->record_type);
DECL_ARTIFICIAL (name) = 1;