gcc/omp-general.h

   1 /* General types and functions that are uselful for processing of OpenMP,
   2    OpenACC and similar directivers at various stages of compilation.
   3
   4    Copyright (C) 2005-2021 Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef GCC_OMP_GENERAL_H
  23 #define GCC_OMP_GENERAL_H
  24
  25 #include "gomp-constants.h"
  26
  27 /*  Flags for an OpenACC loop.  */
  28
  29 enum oacc_loop_flags {
  30   OLF_SEQ       = 1u << 0,  /* Explicitly sequential  */
  31   OLF_AUTO      = 1u << 1,      /* Compiler chooses axes.  */
  32   OLF_INDEPENDENT = 1u << 2,    /* Iterations are known independent.  */
  33   OLF_GANG_STATIC = 1u << 3,    /* Gang partitioning is static (has op). */
  34   OLF_TILE      = 1u << 4,      /* Tiled loop. */
  35
  36   /* Explicitly specified loop axes.  */
  37   OLF_DIM_BASE = 5,
  38   OLF_DIM_GANG   = 1u << (OLF_DIM_BASE + GOMP_DIM_GANG),
  39   OLF_DIM_WORKER = 1u << (OLF_DIM_BASE + GOMP_DIM_WORKER),
  40   OLF_DIM_VECTOR = 1u << (OLF_DIM_BASE + GOMP_DIM_VECTOR),
  41
  42   OLF_MAX = OLF_DIM_BASE + GOMP_DIM_MAX
  43 };
  44
  45 /* A structure holding the elements of:
  46    for (V = N1; V cond N2; V += STEP) [...]
  47    or for non-rectangular loops:
  48    for (V = M1 * W + N1; V cond M2 * W + N2; V += STEP;
  49    where W is V of the OUTER-th loop (e.g. for OUTER 1 it is the
  50    the index of the immediately surrounding loop).
  51    NON_RECT_REFERENCED is true for loops referenced by loops
  52    with non-NULL M1 or M2.  */
  53
  54 struct omp_for_data_loop
  55 {
  56   tree v, n1, n2, step, m1, m2;
  57   enum tree_code cond_code;
  58   int outer;
  59   bool non_rect_referenced;
  60 };
  61
  62 /* A structure describing the main elements of a parallel loop.  */
  63
  64 struct omp_for_data
  65 {
  66   struct omp_for_data_loop loop;
  67   tree chunk_size;
  68   gomp_for *for_stmt;
  69   tree pre, iter_type;
  70   tree tiling;  /* Tiling values (if non null).  */
  71   int collapse;  /* Collapsed loops, 1 for a non-collapsed loop.  */
  72   int ordered;
  73   int first_nonrect, last_nonrect;
  74   bool have_nowait, have_ordered, simd_schedule, have_reductemp;
  75   bool have_pointer_condtemp, have_scantemp, have_nonctrl_scantemp;
  76   bool non_rect;
  77   int lastprivate_conditional;
  78   unsigned char sched_modifiers;
  79   enum omp_clause_schedule_kind sched_kind;
  80   struct omp_for_data_loop *loops;
  81   /* The following are relevant only for non-rectangular loops
  82      where only a single loop depends on an outer loop iterator.  */
  83   tree first_inner_iterations; /* Number of iterations of the inner
  84                                   loop with the first outer iterator
  85                                   (or adjn1, if that is non-NULL).  */
  86   tree factor; /* (m2 - m1) * outer_step / inner_step.  */
  87   /* Adjusted n1 of the outer loop in such loop nests (if needed).  */
  88   tree adjn1;
  89 };
  90
  91 #define OACC_FN_ATTRIB "oacc function"
  92
  93 extern tree omp_find_clause (tree clauses, enum omp_clause_code kind);
  94 extern bool omp_is_allocatable_or_ptr (tree decl);
  95 extern tree omp_check_optional_argument (tree decl, bool for_present_check);
  96 extern bool omp_privatize_by_reference (tree decl);
  97 extern void omp_adjust_for_condition (location_t loc, enum tree_code *cond_code,
  98                                       tree *n2, tree v, tree step);
  99 extern tree omp_get_for_step_from_incr (location_t loc, tree incr);
 100 extern void omp_extract_for_data (gomp_for *for_stmt, struct omp_for_data *fd,
 101                                   struct omp_for_data_loop *loops);
 102 extern gimple *omp_build_barrier (tree lhs);
 103 extern tree find_combined_omp_for (tree *, int *, void *);
 104 extern poly_uint64 omp_max_vf (void);
 105 extern int omp_max_simt_vf (void);
 106 extern int omp_constructor_traits_to_codes (tree, enum tree_code *);
 107 extern tree omp_check_context_selector (location_t loc, tree ctx);
 108 extern void omp_mark_declare_variant (location_t loc, tree variant,
 109                                       tree construct);
 110 extern int omp_context_selector_matches (tree);
 111 extern int omp_context_selector_set_compare (const char *, tree, tree);
 112 extern tree omp_get_context_selector (tree, const char *, const char *);
 113 extern tree omp_resolve_declare_variant (tree);
 114 extern tree oacc_launch_pack (unsigned code, tree device, unsigned op);
 115 extern tree oacc_replace_fn_attrib_attr (tree attribs, tree dims);
 116 extern void oacc_replace_fn_attrib (tree fn, tree dims);
 117 extern void oacc_set_fn_attrib (tree fn, tree clauses, vec<tree> *args);
 118 extern int oacc_verify_routine_clauses (tree, tree *, location_t,
 119                                         const char *);
 120 extern tree oacc_build_routine_dims (tree clauses);
 121 extern tree oacc_get_fn_attrib (tree fn);
 122 extern bool offloading_function_p (tree fn);
 123 extern int oacc_get_fn_dim_size (tree fn, int axis);
 124 extern int oacc_get_ifn_dim_arg (const gimple *stmt);
 125
 126 enum omp_requires {
 127   OMP_REQUIRES_ATOMIC_DEFAULT_MEM_ORDER = 0xf,
 128   OMP_REQUIRES_UNIFIED_ADDRESS = 0x10,
 129   OMP_REQUIRES_UNIFIED_SHARED_MEMORY = 0x20,
 130   OMP_REQUIRES_DYNAMIC_ALLOCATORS = 0x40,
 131   OMP_REQUIRES_REVERSE_OFFLOAD = 0x80,
 132   OMP_REQUIRES_ATOMIC_DEFAULT_MEM_ORDER_USED = 0x100,
 133   OMP_REQUIRES_TARGET_USED = 0x200
 134 };
 135
 136 extern GTY(()) enum omp_requires omp_requires_mask;
 137
 138 static inline dump_flags_t
 139 get_openacc_privatization_dump_flags ()
 140 {
 141   dump_flags_t l_dump_flags = MSG_NOTE;
 142
 143   /* For '--param=openacc-privatization=quiet', diagnostics only go to dump
 144      files.  */
 145   if (param_openacc_privatization == OPENACC_PRIVATIZATION_QUIET)
 146     l_dump_flags |= MSG_PRIORITY_INTERNALS;
 147
 148   return l_dump_flags;
 149 }
 150
 151 #endif /* GCC_OMP_GENERAL_H */