1657 lines
46 KiB
C++
1657 lines
46 KiB
C++
/* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
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Copyright (C) 1992-2022 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "target.h"
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#include "function.h" /* For cfun. */
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#include "c-common.h"
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#include "memmodel.h"
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#include "tm_p.h" /* For REGISTER_TARGET_PRAGMAS. */
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#include "stringpool.h"
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#include "cgraph.h"
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#include "diagnostic.h"
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#include "attribs.h"
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#include "varasm.h"
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#include "c-pragma.h"
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#include "opts.h"
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#include "plugin.h"
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#include "opt-suggestions.h"
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#define GCC_BAD(gmsgid) \
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do { warning (OPT_Wpragmas, gmsgid); return; } while (0)
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#define GCC_BAD2(gmsgid, arg) \
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do { warning (OPT_Wpragmas, gmsgid, arg); return; } while (0)
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#define GCC_BAD_AT(loc, gmsgid) \
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do { warning_at (loc, OPT_Wpragmas, gmsgid); return; } while (0)
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#define GCC_BAD2_AT(loc, gmsgid, arg) \
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do { warning_at (loc, OPT_Wpragmas, gmsgid, arg); return; } while (0)
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struct GTY(()) align_stack {
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int alignment;
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tree id;
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struct align_stack * prev;
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};
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static GTY(()) struct align_stack * alignment_stack;
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static void handle_pragma_pack (cpp_reader *);
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/* If we have a "global" #pragma pack(<n>) in effect when the first
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#pragma pack(push,<n>) is encountered, this stores the value of
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maximum_field_alignment in effect. When the final pop_alignment()
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happens, we restore the value to this, not to a value of 0 for
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maximum_field_alignment. Value is in bits. */
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static int default_alignment;
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#define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = *(alignment_stack == NULL \
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? &default_alignment \
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: &alignment_stack->alignment) = (ALIGN))
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static void push_alignment (int, tree);
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static void pop_alignment (tree);
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/* Push an alignment value onto the stack. */
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static void
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push_alignment (int alignment, tree id)
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{
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align_stack * entry = ggc_alloc<align_stack> ();
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entry->alignment = alignment;
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entry->id = id;
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entry->prev = alignment_stack;
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/* The current value of maximum_field_alignment is not necessarily
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0 since there may be a #pragma pack(<n>) in effect; remember it
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so that we can restore it after the final #pragma pop(). */
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if (alignment_stack == NULL)
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default_alignment = maximum_field_alignment;
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alignment_stack = entry;
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maximum_field_alignment = alignment;
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}
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/* Undo a push of an alignment onto the stack. */
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static void
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pop_alignment (tree id)
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{
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align_stack * entry;
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if (alignment_stack == NULL)
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GCC_BAD ("%<#pragma pack (pop)%> encountered without matching "
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"%<#pragma pack (push)%>");
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/* If we got an identifier, strip away everything above the target
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entry so that the next step will restore the state just below it. */
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if (id)
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{
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for (entry = alignment_stack; entry; entry = entry->prev)
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if (entry->id == id)
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{
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alignment_stack = entry;
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break;
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}
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if (entry == NULL)
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warning (OPT_Wpragmas,
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"%<#pragma pack(pop, %E)%> encountered without matching "
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"%<#pragma pack(push, %E)%>"
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, id, id);
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}
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entry = alignment_stack->prev;
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maximum_field_alignment = entry ? entry->alignment : default_alignment;
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alignment_stack = entry;
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}
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/* #pragma pack ()
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#pragma pack (N)
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#pragma pack (push)
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#pragma pack (push, N)
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#pragma pack (push, ID)
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#pragma pack (push, ID, N)
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#pragma pack (pop)
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#pragma pack (pop, ID) */
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static void
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handle_pragma_pack (cpp_reader *)
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{
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location_t loc;
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tree x, id = 0;
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int align = -1;
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enum cpp_ttype token;
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enum { set, push, pop } action;
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if (pragma_lex (&x) != CPP_OPEN_PAREN)
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GCC_BAD ("missing %<(%> after %<#pragma pack%> - ignored");
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token = pragma_lex (&x, &loc);
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if (token == CPP_CLOSE_PAREN)
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{
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action = set;
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align = initial_max_fld_align;
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}
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else if (token == CPP_NUMBER)
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{
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if (TREE_CODE (x) != INTEGER_CST)
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GCC_BAD_AT (loc, "invalid constant in %<#pragma pack%> - ignored");
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align = TREE_INT_CST_LOW (x);
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action = set;
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if (pragma_lex (&x) != CPP_CLOSE_PAREN)
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GCC_BAD ("malformed %<#pragma pack%> - ignored");
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}
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else if (token == CPP_NAME)
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{
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#define GCC_BAD_ACTION do { if (action != pop) \
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GCC_BAD ("malformed %<#pragma pack(push[, id][, <n>])%> - ignored"); \
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else \
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GCC_BAD ("malformed %<#pragma pack(pop[, id])%> - ignored"); \
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} while (0)
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const char *op = IDENTIFIER_POINTER (x);
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if (!strcmp (op, "push"))
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action = push;
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else if (!strcmp (op, "pop"))
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action = pop;
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else
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GCC_BAD2_AT (loc, "unknown action %qE for %<#pragma pack%> - ignored",
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x);
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while ((token = pragma_lex (&x)) == CPP_COMMA)
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{
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token = pragma_lex (&x, &loc);
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if (token == CPP_NAME && id == 0)
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{
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id = x;
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}
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else if (token == CPP_NUMBER && action == push && align == -1)
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{
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if (TREE_CODE (x) != INTEGER_CST)
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GCC_BAD_AT (loc,
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"invalid constant in %<#pragma pack%> - ignored");
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align = TREE_INT_CST_LOW (x);
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if (align == -1)
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action = set;
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}
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else
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GCC_BAD_ACTION;
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}
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if (token != CPP_CLOSE_PAREN)
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GCC_BAD_ACTION;
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#undef GCC_BAD_ACTION
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}
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else
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GCC_BAD ("malformed %<#pragma pack%> - ignored");
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if (pragma_lex (&x, &loc) != CPP_EOF)
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warning_at (loc, OPT_Wpragmas, "junk at end of %<#pragma pack%>");
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if (flag_pack_struct)
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GCC_BAD ("%<#pragma pack%> has no effect with %<-fpack-struct%> - ignored");
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if (action != pop)
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switch (align)
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{
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case 0:
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case 1:
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case 2:
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case 4:
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case 8:
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case 16:
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align *= BITS_PER_UNIT;
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break;
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case -1:
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if (action == push)
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{
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align = maximum_field_alignment;
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break;
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}
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/* FALLTHRU */
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default:
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GCC_BAD2 ("alignment must be a small power of two, not %d", align);
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}
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switch (action)
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{
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case set: SET_GLOBAL_ALIGNMENT (align); break;
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case push: push_alignment (align, id); break;
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case pop: pop_alignment (id); break;
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}
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}
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struct GTY(()) pending_weak
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{
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tree name;
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tree value;
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};
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static GTY(()) vec<pending_weak, va_gc> *pending_weaks;
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static void apply_pragma_weak (tree, tree);
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static void handle_pragma_weak (cpp_reader *);
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static void
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apply_pragma_weak (tree decl, tree value)
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{
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if (value)
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{
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value = build_string (IDENTIFIER_LENGTH (value),
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IDENTIFIER_POINTER (value));
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decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
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build_tree_list (NULL, value)),
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0);
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}
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if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl)
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&& !DECL_WEAK (decl) /* Don't complain about a redundant #pragma. */
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&& DECL_ASSEMBLER_NAME_SET_P (decl)
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&& TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
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warning (OPT_Wpragmas, "applying %<#pragma weak %+D%> after first use "
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"results in unspecified behavior", decl);
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declare_weak (decl);
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}
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void
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maybe_apply_pragma_weak (tree decl)
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{
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tree id;
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int i;
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pending_weak *pe;
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/* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */
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/* No weak symbols pending, take the short-cut. */
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if (vec_safe_is_empty (pending_weaks))
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return;
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/* If it's not visible outside this file, it doesn't matter whether
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it's weak. */
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if (!DECL_EXTERNAL (decl) && !TREE_PUBLIC (decl))
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return;
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/* If it's not a function or a variable, it can't be weak.
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FIXME: what kinds of things are visible outside this file but
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aren't functions or variables? Should this be an assert instead? */
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if (!VAR_OR_FUNCTION_DECL_P (decl))
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return;
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if (DECL_ASSEMBLER_NAME_SET_P (decl))
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id = DECL_ASSEMBLER_NAME (decl);
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else
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{
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id = DECL_ASSEMBLER_NAME (decl);
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SET_DECL_ASSEMBLER_NAME (decl, NULL_TREE);
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}
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FOR_EACH_VEC_ELT (*pending_weaks, i, pe)
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if (id == pe->name)
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{
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apply_pragma_weak (decl, pe->value);
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pending_weaks->unordered_remove (i);
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break;
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}
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}
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/* Process all "#pragma weak A = B" directives where we have not seen
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a decl for A. */
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void
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maybe_apply_pending_pragma_weaks (void)
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{
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tree alias_id, id, decl;
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int i;
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pending_weak *pe;
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symtab_node *target;
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if (vec_safe_is_empty (pending_weaks))
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return;
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FOR_EACH_VEC_ELT (*pending_weaks, i, pe)
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{
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alias_id = pe->name;
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id = pe->value;
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if (id == NULL)
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continue;
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target = symtab_node::get_for_asmname (id);
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decl = build_decl (UNKNOWN_LOCATION,
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target ? TREE_CODE (target->decl) : FUNCTION_DECL,
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alias_id, default_function_type);
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DECL_ARTIFICIAL (decl) = 1;
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TREE_PUBLIC (decl) = 1;
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DECL_WEAK (decl) = 1;
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if (VAR_P (decl))
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TREE_STATIC (decl) = 1;
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if (!target)
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{
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error ("%q+D aliased to undefined symbol %qE",
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decl, id);
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continue;
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}
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assemble_alias (decl, id);
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}
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}
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/* #pragma weak name [= value] */
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static void
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handle_pragma_weak (cpp_reader *)
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{
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tree name, value, x, decl;
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enum cpp_ttype t;
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value = 0;
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if (pragma_lex (&name) != CPP_NAME)
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GCC_BAD ("malformed %<#pragma weak%>, ignored");
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t = pragma_lex (&x);
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if (t == CPP_EQ)
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{
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if (pragma_lex (&value) != CPP_NAME)
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GCC_BAD ("malformed %<#pragma weak%>, ignored");
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t = pragma_lex (&x);
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}
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if (t != CPP_EOF)
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warning (OPT_Wpragmas, "junk at end of %<#pragma weak%>");
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decl = identifier_global_value (name);
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if (decl && DECL_P (decl))
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{
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if (!VAR_OR_FUNCTION_DECL_P (decl))
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GCC_BAD2 ("%<#pragma weak%> declaration of %q+D not allowed,"
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" ignored", decl);
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apply_pragma_weak (decl, value);
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if (value)
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{
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DECL_EXTERNAL (decl) = 0;
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if (VAR_P (decl))
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TREE_STATIC (decl) = 1;
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assemble_alias (decl, value);
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}
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}
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else
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{
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pending_weak pe = {name, value};
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vec_safe_push (pending_weaks, pe);
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}
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}
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static enum scalar_storage_order_kind global_sso;
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void
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maybe_apply_pragma_scalar_storage_order (tree type)
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{
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if (global_sso == SSO_NATIVE)
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return;
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gcc_assert (RECORD_OR_UNION_TYPE_P (type));
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if (lookup_attribute ("scalar_storage_order", TYPE_ATTRIBUTES (type)))
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return;
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if (global_sso == SSO_BIG_ENDIAN)
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TYPE_REVERSE_STORAGE_ORDER (type) = !BYTES_BIG_ENDIAN;
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else if (global_sso == SSO_LITTLE_ENDIAN)
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TYPE_REVERSE_STORAGE_ORDER (type) = BYTES_BIG_ENDIAN;
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else
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gcc_unreachable ();
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}
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static void
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handle_pragma_scalar_storage_order (cpp_reader *)
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{
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const char *kind_string;
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enum cpp_ttype token;
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tree x;
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if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN)
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{
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error ("%<scalar_storage_order%> is not supported because endianness "
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"is not uniform");
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return;
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}
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if (c_dialect_cxx ())
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{
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if (warn_unknown_pragmas > in_system_header_at (input_location))
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warning (OPT_Wunknown_pragmas,
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"%<#pragma scalar_storage_order%> is not supported for C++");
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return;
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}
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token = pragma_lex (&x);
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if (token != CPP_NAME)
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GCC_BAD ("missing %<big-endian%>, %<little-endian%>, or %<default%> after "
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"%<#pragma scalar_storage_order%>");
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kind_string = IDENTIFIER_POINTER (x);
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if (strcmp (kind_string, "default") == 0)
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global_sso = default_sso;
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else if (strcmp (kind_string, "big") == 0)
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global_sso = SSO_BIG_ENDIAN;
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else if (strcmp (kind_string, "little") == 0)
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global_sso = SSO_LITTLE_ENDIAN;
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else
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GCC_BAD ("expected %<big-endian%>, %<little-endian%>, or %<default%> after "
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"%<#pragma scalar_storage_order%>");
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}
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/* GCC supports two #pragma directives for renaming the external
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symbol associated with a declaration (DECL_ASSEMBLER_NAME), for
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compatibility with the Solaris and VMS system headers. GCC also
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has its own notation for this, __asm__("name") annotations.
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Corner cases of these features and their interaction:
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1) Both pragmas silently apply only to declarations with external
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linkage (that is, TREE_PUBLIC || DECL_EXTERNAL). Asm labels
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do not have this restriction.
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2) In C++, both #pragmas silently apply only to extern "C" declarations.
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Asm labels do not have this restriction.
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3) If any of the three ways of changing DECL_ASSEMBLER_NAME is
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applied to a decl whose DECL_ASSEMBLER_NAME is already set, and the
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new name is different, a warning issues and the name does not change.
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4) The "source name" for #pragma redefine_extname is the DECL_NAME,
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*not* the DECL_ASSEMBLER_NAME.
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5) If #pragma extern_prefix is in effect and a declaration occurs
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with an __asm__ name, the #pragma extern_prefix is silently
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ignored for that declaration.
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6) If #pragma extern_prefix and #pragma redefine_extname apply to
|
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the same declaration, whichever triggered first wins, and a warning
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is issued. (We would like to have #pragma redefine_extname always
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win, but it can appear either before or after the declaration, and
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if it appears afterward, we have no way of knowing whether a modified
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DECL_ASSEMBLER_NAME is due to #pragma extern_prefix.) */
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struct GTY(()) pending_redefinition {
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tree oldname;
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tree newname;
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};
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static GTY(()) vec<pending_redefinition, va_gc> *pending_redefine_extname;
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static void handle_pragma_redefine_extname (cpp_reader *);
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|
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/* #pragma redefine_extname oldname newname */
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static void
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handle_pragma_redefine_extname (cpp_reader *)
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{
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tree oldname, newname, decls, x;
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enum cpp_ttype t;
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bool found;
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|
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if (pragma_lex (&oldname) != CPP_NAME)
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GCC_BAD ("malformed %<#pragma redefine_extname%>, ignored");
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if (pragma_lex (&newname) != CPP_NAME)
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GCC_BAD ("malformed %<#pragma redefine_extname%>, ignored");
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t = pragma_lex (&x);
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if (t != CPP_EOF)
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warning (OPT_Wpragmas, "junk at end of %<#pragma redefine_extname%>");
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found = false;
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for (decls = c_linkage_bindings (oldname);
|
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decls; )
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{
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tree decl;
|
|
if (TREE_CODE (decls) == TREE_LIST)
|
|
{
|
|
decl = TREE_VALUE (decls);
|
|
decls = TREE_CHAIN (decls);
|
|
}
|
|
else
|
|
{
|
|
decl = decls;
|
|
decls = NULL_TREE;
|
|
}
|
|
|
|
if ((TREE_PUBLIC (decl) || DECL_EXTERNAL (decl))
|
|
&& VAR_OR_FUNCTION_DECL_P (decl))
|
|
{
|
|
found = true;
|
|
if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
|
{
|
|
const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
|
name = targetm.strip_name_encoding (name);
|
|
|
|
if (!id_equal (newname, name))
|
|
warning (OPT_Wpragmas, "%<#pragma redefine_extname%> "
|
|
"ignored due to conflict with previous rename");
|
|
}
|
|
else
|
|
symtab->change_decl_assembler_name (decl, newname);
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
/* We have to add this to the rename list even if there's already
|
|
a global value that doesn't meet the above criteria, because in
|
|
C++ "struct foo {...};" puts "foo" in the current namespace but
|
|
does *not* conflict with a subsequent declaration of a function
|
|
or variable foo. See g++.dg/other/pragma-re-2.C. */
|
|
add_to_renaming_pragma_list (oldname, newname);
|
|
}
|
|
|
|
/* This is called from here and from ia64-c.cc. */
|
|
void
|
|
add_to_renaming_pragma_list (tree oldname, tree newname)
|
|
{
|
|
unsigned ix;
|
|
pending_redefinition *p;
|
|
|
|
FOR_EACH_VEC_SAFE_ELT (pending_redefine_extname, ix, p)
|
|
if (oldname == p->oldname)
|
|
{
|
|
if (p->newname != newname)
|
|
warning (OPT_Wpragmas, "%<#pragma redefine_extname%> ignored due to "
|
|
"conflict with previous %<#pragma redefine_extname%>");
|
|
return;
|
|
}
|
|
|
|
pending_redefinition e = {oldname, newname};
|
|
vec_safe_push (pending_redefine_extname, e);
|
|
}
|
|
|
|
/* The current prefix set by #pragma extern_prefix. */
|
|
GTY(()) tree pragma_extern_prefix;
|
|
|
|
/* Hook from the front ends to apply the results of one of the preceding
|
|
pragmas that rename variables. */
|
|
|
|
tree
|
|
maybe_apply_renaming_pragma (tree decl, tree asmname)
|
|
{
|
|
unsigned ix;
|
|
pending_redefinition *p;
|
|
|
|
/* The renaming pragmas are only applied to declarations with
|
|
external linkage. */
|
|
if (!VAR_OR_FUNCTION_DECL_P (decl)
|
|
|| (!TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl))
|
|
|| !has_c_linkage (decl))
|
|
return asmname;
|
|
|
|
/* If the DECL_ASSEMBLER_NAME is already set, it does not change,
|
|
but we may warn about a rename that conflicts. */
|
|
if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
|
{
|
|
const char *oldname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
|
oldname = targetm.strip_name_encoding (oldname);
|
|
|
|
if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldname))
|
|
warning (OPT_Wpragmas, "%<asm%> declaration ignored due to "
|
|
"conflict with previous rename");
|
|
|
|
/* Take any pending redefine_extname off the list. */
|
|
FOR_EACH_VEC_SAFE_ELT (pending_redefine_extname, ix, p)
|
|
if (DECL_NAME (decl) == p->oldname)
|
|
{
|
|
/* Only warn if there is a conflict. */
|
|
if (!id_equal (p->newname, oldname))
|
|
warning (OPT_Wpragmas, "%<#pragma redefine_extname%> ignored "
|
|
"due to conflict with previous rename");
|
|
|
|
pending_redefine_extname->unordered_remove (ix);
|
|
break;
|
|
}
|
|
return NULL_TREE;
|
|
}
|
|
|
|
/* Find out if we have a pending #pragma redefine_extname. */
|
|
FOR_EACH_VEC_SAFE_ELT (pending_redefine_extname, ix, p)
|
|
if (DECL_NAME (decl) == p->oldname)
|
|
{
|
|
tree newname = p->newname;
|
|
pending_redefine_extname->unordered_remove (ix);
|
|
|
|
/* If we already have an asmname, #pragma redefine_extname is
|
|
ignored (with a warning if it conflicts). */
|
|
if (asmname)
|
|
{
|
|
if (strcmp (TREE_STRING_POINTER (asmname),
|
|
IDENTIFIER_POINTER (newname)) != 0)
|
|
warning (OPT_Wpragmas, "%<#pragma redefine_extname%> ignored "
|
|
"due to conflict with %<asm%> declaration");
|
|
return asmname;
|
|
}
|
|
|
|
/* Otherwise we use what we've got; #pragma extern_prefix is
|
|
silently ignored. */
|
|
return build_string (IDENTIFIER_LENGTH (newname),
|
|
IDENTIFIER_POINTER (newname));
|
|
}
|
|
|
|
/* If we've got an asmname, #pragma extern_prefix is silently ignored. */
|
|
if (asmname)
|
|
return asmname;
|
|
|
|
/* If #pragma extern_prefix is in effect, apply it. */
|
|
if (pragma_extern_prefix)
|
|
{
|
|
const char *prefix = TREE_STRING_POINTER (pragma_extern_prefix);
|
|
size_t plen = TREE_STRING_LENGTH (pragma_extern_prefix) - 1;
|
|
|
|
const char *id = IDENTIFIER_POINTER (DECL_NAME (decl));
|
|
size_t ilen = IDENTIFIER_LENGTH (DECL_NAME (decl));
|
|
|
|
char *newname = (char *) alloca (plen + ilen + 1);
|
|
|
|
memcpy (newname, prefix, plen);
|
|
memcpy (newname + plen, id, ilen + 1);
|
|
|
|
return build_string (plen + ilen, newname);
|
|
}
|
|
|
|
/* Nada. */
|
|
return NULL_TREE;
|
|
}
|
|
|
|
|
|
static void handle_pragma_visibility (cpp_reader *);
|
|
|
|
static vec<int> visstack;
|
|
|
|
/* Push the visibility indicated by STR onto the top of the #pragma
|
|
visibility stack. KIND is 0 for #pragma GCC visibility, 1 for
|
|
C++ namespace with visibility attribute and 2 for C++ builtin
|
|
ABI namespace. push_visibility/pop_visibility calls must have
|
|
matching KIND, it is not allowed to push visibility using one
|
|
KIND and pop using a different one. */
|
|
|
|
void
|
|
push_visibility (const char *str, int kind)
|
|
{
|
|
visstack.safe_push (((int) default_visibility) | (kind << 8));
|
|
if (!strcmp (str, "default"))
|
|
default_visibility = VISIBILITY_DEFAULT;
|
|
else if (!strcmp (str, "internal"))
|
|
default_visibility = VISIBILITY_INTERNAL;
|
|
else if (!strcmp (str, "hidden"))
|
|
default_visibility = VISIBILITY_HIDDEN;
|
|
else if (!strcmp (str, "protected"))
|
|
default_visibility = VISIBILITY_PROTECTED;
|
|
else
|
|
GCC_BAD ("%<#pragma GCC visibility push()%> must specify %<default%>, "
|
|
"%<internal%>, %<hidden%> or %<protected%>");
|
|
visibility_options.inpragma = 1;
|
|
}
|
|
|
|
/* Pop a level of the #pragma visibility stack. Return true if
|
|
successful. */
|
|
|
|
bool
|
|
pop_visibility (int kind)
|
|
{
|
|
if (!visstack.length ())
|
|
return false;
|
|
if ((visstack.last () >> 8) != kind)
|
|
return false;
|
|
default_visibility
|
|
= (enum symbol_visibility) (visstack.pop () & 0xff);
|
|
visibility_options.inpragma
|
|
= visstack.length () != 0;
|
|
return true;
|
|
}
|
|
|
|
/* Sets the default visibility for symbols to something other than that
|
|
specified on the command line. */
|
|
|
|
static void
|
|
handle_pragma_visibility (cpp_reader *)
|
|
{
|
|
/* Form is #pragma GCC visibility push(hidden)|pop */
|
|
tree x;
|
|
enum cpp_ttype token;
|
|
enum { bad, push, pop } action = bad;
|
|
|
|
token = pragma_lex (&x);
|
|
if (token == CPP_NAME)
|
|
{
|
|
const char *op = IDENTIFIER_POINTER (x);
|
|
if (!strcmp (op, "push"))
|
|
action = push;
|
|
else if (!strcmp (op, "pop"))
|
|
action = pop;
|
|
}
|
|
if (bad == action)
|
|
GCC_BAD ("%<#pragma GCC visibility%> must be followed by %<push%> "
|
|
"or %<pop%>");
|
|
else
|
|
{
|
|
if (pop == action)
|
|
{
|
|
if (! pop_visibility (0))
|
|
GCC_BAD ("no matching push for %<#pragma GCC visibility pop%>");
|
|
}
|
|
else
|
|
{
|
|
if (pragma_lex (&x) != CPP_OPEN_PAREN)
|
|
GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
|
token = pragma_lex (&x);
|
|
if (token != CPP_NAME)
|
|
GCC_BAD ("malformed %<#pragma GCC visibility push%>");
|
|
else
|
|
push_visibility (IDENTIFIER_POINTER (x), 0);
|
|
if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
|
GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
|
}
|
|
}
|
|
if (pragma_lex (&x) != CPP_EOF)
|
|
warning (OPT_Wpragmas, "junk at end of %<#pragma GCC visibility%>");
|
|
}
|
|
|
|
static void
|
|
handle_pragma_diagnostic(cpp_reader *)
|
|
{
|
|
tree x;
|
|
location_t loc;
|
|
enum cpp_ttype token = pragma_lex (&x, &loc);
|
|
if (token != CPP_NAME)
|
|
{
|
|
warning_at (loc, OPT_Wpragmas,
|
|
"missing %<error%>, %<warning%>, %<ignored%>, %<push%>, "
|
|
"%<pop%>, or %<ignored_attributes%> after "
|
|
"%<#pragma GCC diagnostic%>");
|
|
return;
|
|
}
|
|
|
|
diagnostic_t kind;
|
|
const char *kind_string = IDENTIFIER_POINTER (x);
|
|
if (strcmp (kind_string, "error") == 0)
|
|
kind = DK_ERROR;
|
|
else if (strcmp (kind_string, "warning") == 0)
|
|
kind = DK_WARNING;
|
|
else if (strcmp (kind_string, "ignored") == 0)
|
|
kind = DK_IGNORED;
|
|
else if (strcmp (kind_string, "push") == 0)
|
|
{
|
|
diagnostic_push_diagnostics (global_dc, input_location);
|
|
return;
|
|
}
|
|
else if (strcmp (kind_string, "pop") == 0)
|
|
{
|
|
diagnostic_pop_diagnostics (global_dc, input_location);
|
|
return;
|
|
}
|
|
else if (strcmp (kind_string, "ignored_attributes") == 0)
|
|
{
|
|
token = pragma_lex (&x, &loc);
|
|
if (token != CPP_STRING)
|
|
{
|
|
warning_at (loc, OPT_Wpragmas,
|
|
"missing attribute name after %<#pragma GCC diagnostic "
|
|
"ignored_attributes%>");
|
|
return;
|
|
}
|
|
char *args = xstrdup (TREE_STRING_POINTER (x));
|
|
const size_t l = strlen (args);
|
|
if (l == 0)
|
|
{
|
|
warning_at (loc, OPT_Wpragmas, "missing argument to %<#pragma GCC "
|
|
"diagnostic ignored_attributes%>");
|
|
free (args);
|
|
return;
|
|
}
|
|
else if (args[l - 1] == ',')
|
|
{
|
|
warning_at (loc, OPT_Wpragmas, "trailing %<,%> in arguments for "
|
|
"%<#pragma GCC diagnostic ignored_attributes%>");
|
|
free (args);
|
|
return;
|
|
}
|
|
auto_vec<char *> v;
|
|
for (char *p = strtok (args, ","); p; p = strtok (NULL, ","))
|
|
v.safe_push (p);
|
|
handle_ignored_attributes_option (&v);
|
|
free (args);
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
warning_at (loc, OPT_Wpragmas,
|
|
"expected %<error%>, %<warning%>, %<ignored%>, %<push%>, "
|
|
"%<pop%>, %<ignored_attributes%> after "
|
|
"%<#pragma GCC diagnostic%>");
|
|
return;
|
|
}
|
|
|
|
token = pragma_lex (&x, &loc);
|
|
if (token != CPP_STRING)
|
|
{
|
|
warning_at (loc, OPT_Wpragmas,
|
|
"missing option after %<#pragma GCC diagnostic%> kind");
|
|
return;
|
|
}
|
|
|
|
const char *option_string = TREE_STRING_POINTER (x);
|
|
unsigned int lang_mask = c_common_option_lang_mask () | CL_COMMON;
|
|
/* option_string + 1 to skip the initial '-' */
|
|
unsigned int option_index = find_opt (option_string + 1, lang_mask);
|
|
if (option_index == OPT_SPECIAL_unknown)
|
|
{
|
|
auto_diagnostic_group d;
|
|
if (warning_at (loc, OPT_Wpragmas,
|
|
"unknown option after %<#pragma GCC diagnostic%> kind"))
|
|
{
|
|
option_proposer op;
|
|
const char *hint = op.suggest_option (option_string + 1);
|
|
if (hint)
|
|
inform (loc, "did you mean %<-%s%>?", hint);
|
|
}
|
|
return;
|
|
}
|
|
else if (!(cl_options[option_index].flags & CL_WARNING))
|
|
{
|
|
warning_at (loc, OPT_Wpragmas,
|
|
"%qs is not an option that controls warnings", option_string);
|
|
return;
|
|
}
|
|
else if (!(cl_options[option_index].flags & lang_mask))
|
|
{
|
|
char *ok_langs = write_langs (cl_options[option_index].flags);
|
|
char *bad_lang = write_langs (c_common_option_lang_mask ());
|
|
warning_at (loc, OPT_Wpragmas,
|
|
"option %qs is valid for %s but not for %s",
|
|
option_string, ok_langs, bad_lang);
|
|
free (ok_langs);
|
|
free (bad_lang);
|
|
return;
|
|
}
|
|
|
|
struct cl_option_handlers handlers;
|
|
set_default_handlers (&handlers, NULL);
|
|
const char *arg = NULL;
|
|
if (cl_options[option_index].flags & CL_JOINED)
|
|
arg = option_string + 1 + cl_options[option_index].opt_len;
|
|
/* FIXME: input_location isn't the best location here, but it is
|
|
what we used to do here before and changing it breaks e.g.
|
|
PR69543 and PR69558. */
|
|
control_warning_option (option_index, (int) kind,
|
|
arg, kind != DK_IGNORED,
|
|
input_location, lang_mask, &handlers,
|
|
&global_options, &global_options_set,
|
|
global_dc);
|
|
}
|
|
|
|
/* Parse #pragma GCC target (xxx) to set target specific options. */
|
|
static void
|
|
handle_pragma_target(cpp_reader *)
|
|
{
|
|
location_t loc;
|
|
enum cpp_ttype token;
|
|
tree x;
|
|
bool close_paren_needed_p = false;
|
|
|
|
if (cfun)
|
|
{
|
|
error ("%<#pragma GCC option%> is not allowed inside functions");
|
|
return;
|
|
}
|
|
|
|
token = pragma_lex (&x, &loc);
|
|
if (token == CPP_OPEN_PAREN)
|
|
{
|
|
close_paren_needed_p = true;
|
|
token = pragma_lex (&x, &loc);
|
|
}
|
|
|
|
if (token != CPP_STRING)
|
|
GCC_BAD_AT (loc, "%<#pragma GCC option%> is not a string");
|
|
|
|
/* Strings are user options. */
|
|
else
|
|
{
|
|
tree args = NULL_TREE;
|
|
|
|
do
|
|
{
|
|
/* Build up the strings now as a tree linked list. Skip empty
|
|
strings. */
|
|
if (TREE_STRING_LENGTH (x) > 0)
|
|
args = tree_cons (NULL_TREE, x, args);
|
|
|
|
token = pragma_lex (&x);
|
|
while (token == CPP_COMMA)
|
|
token = pragma_lex (&x);
|
|
}
|
|
while (token == CPP_STRING);
|
|
|
|
if (close_paren_needed_p)
|
|
{
|
|
if (token == CPP_CLOSE_PAREN)
|
|
token = pragma_lex (&x);
|
|
else
|
|
GCC_BAD ("%<#pragma GCC target (string [,string]...)%> does "
|
|
"not have a final %<)%>");
|
|
}
|
|
|
|
if (token != CPP_EOF)
|
|
{
|
|
error ("%<#pragma GCC target%> string is badly formed");
|
|
return;
|
|
}
|
|
|
|
/* put arguments in the order the user typed them. */
|
|
args = nreverse (args);
|
|
|
|
if (targetm.target_option.pragma_parse (args, NULL_TREE))
|
|
current_target_pragma = chainon (current_target_pragma, args);
|
|
|
|
/* A target pragma can also influence optimization options. */
|
|
tree current_optimize
|
|
= build_optimization_node (&global_options, &global_options_set);
|
|
if (current_optimize != optimization_current_node)
|
|
optimization_current_node = current_optimize;
|
|
}
|
|
}
|
|
|
|
/* Handle #pragma GCC optimize to set optimization options. */
|
|
static void
|
|
handle_pragma_optimize (cpp_reader *)
|
|
{
|
|
enum cpp_ttype token;
|
|
tree x;
|
|
bool close_paren_needed_p = false;
|
|
tree optimization_previous_node = optimization_current_node;
|
|
|
|
if (cfun)
|
|
{
|
|
error ("%<#pragma GCC optimize%> is not allowed inside functions");
|
|
return;
|
|
}
|
|
|
|
token = pragma_lex (&x);
|
|
if (token == CPP_OPEN_PAREN)
|
|
{
|
|
close_paren_needed_p = true;
|
|
token = pragma_lex (&x);
|
|
}
|
|
|
|
if (token != CPP_STRING && token != CPP_NUMBER)
|
|
GCC_BAD ("%<#pragma GCC optimize%> is not a string or number");
|
|
|
|
/* Strings/numbers are user options. */
|
|
else
|
|
{
|
|
tree args = NULL_TREE;
|
|
|
|
do
|
|
{
|
|
/* Build up the numbers/strings now as a list. */
|
|
if (token != CPP_STRING || TREE_STRING_LENGTH (x) > 0)
|
|
args = tree_cons (NULL_TREE, x, args);
|
|
|
|
token = pragma_lex (&x);
|
|
while (token == CPP_COMMA)
|
|
token = pragma_lex (&x);
|
|
}
|
|
while (token == CPP_STRING || token == CPP_NUMBER);
|
|
|
|
if (close_paren_needed_p)
|
|
{
|
|
if (token == CPP_CLOSE_PAREN)
|
|
token = pragma_lex (&x);
|
|
else
|
|
GCC_BAD ("%<#pragma GCC optimize (string [,string]...)%> does "
|
|
"not have a final %<)%>");
|
|
}
|
|
|
|
if (token != CPP_EOF)
|
|
{
|
|
error ("%<#pragma GCC optimize%> string is badly formed");
|
|
return;
|
|
}
|
|
|
|
/* put arguments in the order the user typed them. */
|
|
args = nreverse (args);
|
|
|
|
parse_optimize_options (args, false);
|
|
current_optimize_pragma = chainon (current_optimize_pragma, args);
|
|
optimization_current_node
|
|
= build_optimization_node (&global_options, &global_options_set);
|
|
c_cpp_builtins_optimize_pragma (parse_in,
|
|
optimization_previous_node,
|
|
optimization_current_node);
|
|
}
|
|
}
|
|
|
|
/* Stack of the #pragma GCC options created with #pragma GCC push_option. Save
|
|
both the binary representation of the options and the TREE_LIST of
|
|
strings that will be added to the function's attribute list. */
|
|
struct GTY(()) opt_stack {
|
|
struct opt_stack *prev;
|
|
tree target_binary;
|
|
tree target_strings;
|
|
tree optimize_binary;
|
|
tree optimize_strings;
|
|
gcc_options * GTY ((skip)) saved_global_options;
|
|
};
|
|
|
|
static GTY(()) struct opt_stack * options_stack;
|
|
|
|
/* Handle #pragma GCC push_options to save the current target and optimization
|
|
options. */
|
|
|
|
static void
|
|
handle_pragma_push_options (cpp_reader *)
|
|
{
|
|
enum cpp_ttype token;
|
|
tree x = 0;
|
|
|
|
token = pragma_lex (&x);
|
|
if (token != CPP_EOF)
|
|
{
|
|
warning (OPT_Wpragmas, "junk at end of %<#pragma push_options%>");
|
|
return;
|
|
}
|
|
|
|
opt_stack *p = ggc_alloc<opt_stack> ();
|
|
p->prev = options_stack;
|
|
options_stack = p;
|
|
|
|
/* Save optimization and target flags in binary format. */
|
|
if (flag_checking)
|
|
{
|
|
p->saved_global_options = XNEW (gcc_options);
|
|
*p->saved_global_options = global_options;
|
|
}
|
|
p->optimize_binary = build_optimization_node (&global_options,
|
|
&global_options_set);
|
|
p->target_binary = build_target_option_node (&global_options,
|
|
&global_options_set);
|
|
|
|
/* Save optimization and target flags in string list format. */
|
|
p->optimize_strings = copy_list (current_optimize_pragma);
|
|
p->target_strings = copy_list (current_target_pragma);
|
|
}
|
|
|
|
/* Handle #pragma GCC pop_options to restore the current target and
|
|
optimization options from a previous push_options. */
|
|
|
|
static void
|
|
handle_pragma_pop_options (cpp_reader *)
|
|
{
|
|
enum cpp_ttype token;
|
|
tree x = 0;
|
|
opt_stack *p;
|
|
|
|
token = pragma_lex (&x);
|
|
if (token != CPP_EOF)
|
|
{
|
|
warning (OPT_Wpragmas, "junk at end of %<#pragma pop_options%>");
|
|
return;
|
|
}
|
|
|
|
if (! options_stack)
|
|
{
|
|
warning (OPT_Wpragmas,
|
|
"%<#pragma GCC pop_options%> without a corresponding "
|
|
"%<#pragma GCC push_options%>");
|
|
return;
|
|
}
|
|
|
|
p = options_stack;
|
|
options_stack = p->prev;
|
|
|
|
if (p->target_binary != target_option_current_node)
|
|
{
|
|
(void) targetm.target_option.pragma_parse (NULL_TREE, p->target_binary);
|
|
target_option_current_node = p->target_binary;
|
|
}
|
|
|
|
/* Always restore optimization options as optimization_current_node is
|
|
* overwritten by invoke_set_current_function_hook. */
|
|
cl_optimization_restore (&global_options, &global_options_set,
|
|
TREE_OPTIMIZATION (p->optimize_binary));
|
|
cl_target_option_restore (&global_options, &global_options_set,
|
|
TREE_TARGET_OPTION (p->target_binary));
|
|
|
|
if (p->optimize_binary != optimization_current_node)
|
|
{
|
|
c_cpp_builtins_optimize_pragma (parse_in, optimization_current_node,
|
|
p->optimize_binary);
|
|
optimization_current_node = p->optimize_binary;
|
|
}
|
|
if (flag_checking && !seen_error ())
|
|
{
|
|
cl_optimization_compare (p->saved_global_options, &global_options);
|
|
free (p->saved_global_options);
|
|
}
|
|
|
|
current_target_pragma = p->target_strings;
|
|
current_optimize_pragma = p->optimize_strings;
|
|
}
|
|
|
|
/* Handle #pragma GCC reset_options to restore the current target and
|
|
optimization options to the original options used on the command line. */
|
|
|
|
static void
|
|
handle_pragma_reset_options (cpp_reader *)
|
|
{
|
|
enum cpp_ttype token;
|
|
tree x = 0;
|
|
tree new_optimize = optimization_default_node;
|
|
tree new_target = target_option_default_node;
|
|
|
|
token = pragma_lex (&x);
|
|
if (token != CPP_EOF)
|
|
{
|
|
warning (OPT_Wpragmas, "junk at end of %<#pragma reset_options%>");
|
|
return;
|
|
}
|
|
|
|
if (new_target != target_option_current_node)
|
|
{
|
|
(void) targetm.target_option.pragma_parse (NULL_TREE, new_target);
|
|
target_option_current_node = new_target;
|
|
}
|
|
|
|
if (new_optimize != optimization_current_node)
|
|
{
|
|
tree old_optimize = optimization_current_node;
|
|
cl_optimization_restore (&global_options, &global_options_set,
|
|
TREE_OPTIMIZATION (new_optimize));
|
|
c_cpp_builtins_optimize_pragma (parse_in, old_optimize, new_optimize);
|
|
optimization_current_node = new_optimize;
|
|
}
|
|
|
|
current_target_pragma = NULL_TREE;
|
|
current_optimize_pragma = NULL_TREE;
|
|
}
|
|
|
|
/* Print a plain user-specified message. */
|
|
|
|
static void
|
|
handle_pragma_message (cpp_reader *)
|
|
{
|
|
location_t loc;
|
|
enum cpp_ttype token;
|
|
tree x, message = 0;
|
|
|
|
token = pragma_lex (&x);
|
|
if (token == CPP_OPEN_PAREN)
|
|
{
|
|
token = pragma_lex (&x);
|
|
if (token == CPP_STRING)
|
|
message = x;
|
|
else
|
|
GCC_BAD ("expected a string after %<#pragma message%>");
|
|
if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
|
GCC_BAD ("malformed %<#pragma message%>, ignored");
|
|
}
|
|
else if (token == CPP_STRING)
|
|
message = x;
|
|
else
|
|
GCC_BAD ("expected a string after %<#pragma message%>");
|
|
|
|
gcc_assert (message);
|
|
|
|
if (pragma_lex (&x, &loc) != CPP_EOF)
|
|
warning_at (loc, OPT_Wpragmas, "junk at end of %<#pragma message%>");
|
|
|
|
if (TREE_STRING_LENGTH (message) > 1)
|
|
inform (input_location, "%<#pragma message: %s%>",
|
|
TREE_STRING_POINTER (message));
|
|
}
|
|
|
|
/* Mark whether the current location is valid for a STDC pragma. */
|
|
|
|
static bool valid_location_for_stdc_pragma;
|
|
|
|
void
|
|
mark_valid_location_for_stdc_pragma (bool flag)
|
|
{
|
|
valid_location_for_stdc_pragma = flag;
|
|
}
|
|
|
|
/* Return true if the current location is valid for a STDC pragma. */
|
|
|
|
bool
|
|
valid_location_for_stdc_pragma_p (void)
|
|
{
|
|
return valid_location_for_stdc_pragma;
|
|
}
|
|
|
|
enum pragma_switch_t { PRAGMA_ON, PRAGMA_OFF, PRAGMA_DEFAULT, PRAGMA_BAD };
|
|
|
|
/* A STDC pragma must appear outside of external declarations or
|
|
preceding all explicit declarations and statements inside a compound
|
|
statement; its behavior is undefined if used in any other context.
|
|
It takes a switch of ON, OFF, or DEFAULT. */
|
|
|
|
static enum pragma_switch_t
|
|
handle_stdc_pragma (const char *pname)
|
|
{
|
|
const char *arg;
|
|
tree t;
|
|
enum pragma_switch_t ret;
|
|
|
|
if (!valid_location_for_stdc_pragma_p ())
|
|
{
|
|
warning (OPT_Wpragmas, "invalid location for %<pragma %s%>, ignored",
|
|
pname);
|
|
return PRAGMA_BAD;
|
|
}
|
|
|
|
if (pragma_lex (&t) != CPP_NAME)
|
|
{
|
|
warning (OPT_Wpragmas, "malformed %<#pragma %s%>, ignored", pname);
|
|
return PRAGMA_BAD;
|
|
}
|
|
|
|
arg = IDENTIFIER_POINTER (t);
|
|
|
|
if (!strcmp (arg, "ON"))
|
|
ret = PRAGMA_ON;
|
|
else if (!strcmp (arg, "OFF"))
|
|
ret = PRAGMA_OFF;
|
|
else if (!strcmp (arg, "DEFAULT"))
|
|
ret = PRAGMA_DEFAULT;
|
|
else
|
|
{
|
|
warning (OPT_Wpragmas, "malformed %<#pragma %s%>, ignored", pname);
|
|
return PRAGMA_BAD;
|
|
}
|
|
|
|
if (pragma_lex (&t) != CPP_EOF)
|
|
{
|
|
warning (OPT_Wpragmas, "junk at end of %<#pragma %s%>", pname);
|
|
return PRAGMA_BAD;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* #pragma STDC FLOAT_CONST_DECIMAL64 ON
|
|
#pragma STDC FLOAT_CONST_DECIMAL64 OFF
|
|
#pragma STDC FLOAT_CONST_DECIMAL64 DEFAULT */
|
|
|
|
static void
|
|
handle_pragma_float_const_decimal64 (cpp_reader *)
|
|
{
|
|
if (c_dialect_cxx ())
|
|
{
|
|
if (warn_unknown_pragmas > in_system_header_at (input_location))
|
|
warning (OPT_Wunknown_pragmas,
|
|
"%<#pragma STDC FLOAT_CONST_DECIMAL64%> is not supported"
|
|
" for C++");
|
|
return;
|
|
}
|
|
|
|
if (!targetm.decimal_float_supported_p ())
|
|
{
|
|
if (warn_unknown_pragmas > in_system_header_at (input_location))
|
|
warning (OPT_Wunknown_pragmas,
|
|
"%<#pragma STDC FLOAT_CONST_DECIMAL64%> is not supported"
|
|
" on this target");
|
|
return;
|
|
}
|
|
|
|
pedwarn (input_location, OPT_Wpedantic,
|
|
"ISO C does not support %<#pragma STDC FLOAT_CONST_DECIMAL64%>");
|
|
|
|
switch (handle_stdc_pragma ("STDC FLOAT_CONST_DECIMAL64"))
|
|
{
|
|
case PRAGMA_ON:
|
|
set_float_const_decimal64 ();
|
|
break;
|
|
case PRAGMA_OFF:
|
|
case PRAGMA_DEFAULT:
|
|
clear_float_const_decimal64 ();
|
|
break;
|
|
case PRAGMA_BAD:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* A vector of registered pragma callbacks, which is never freed. */
|
|
|
|
static vec<internal_pragma_handler> registered_pragmas;
|
|
|
|
struct pragma_ns_name
|
|
{
|
|
const char *space;
|
|
const char *name;
|
|
};
|
|
|
|
|
|
static vec<pragma_ns_name> registered_pp_pragmas;
|
|
|
|
struct omp_pragma_def { const char *name; unsigned int id; };
|
|
static const struct omp_pragma_def oacc_pragmas[] = {
|
|
{ "atomic", PRAGMA_OACC_ATOMIC },
|
|
{ "cache", PRAGMA_OACC_CACHE },
|
|
{ "data", PRAGMA_OACC_DATA },
|
|
{ "declare", PRAGMA_OACC_DECLARE },
|
|
{ "enter", PRAGMA_OACC_ENTER_DATA },
|
|
{ "exit", PRAGMA_OACC_EXIT_DATA },
|
|
{ "host_data", PRAGMA_OACC_HOST_DATA },
|
|
{ "kernels", PRAGMA_OACC_KERNELS },
|
|
{ "loop", PRAGMA_OACC_LOOP },
|
|
{ "parallel", PRAGMA_OACC_PARALLEL },
|
|
{ "routine", PRAGMA_OACC_ROUTINE },
|
|
{ "serial", PRAGMA_OACC_SERIAL },
|
|
{ "update", PRAGMA_OACC_UPDATE },
|
|
{ "wait", PRAGMA_OACC_WAIT }
|
|
};
|
|
static const struct omp_pragma_def omp_pragmas[] = {
|
|
{ "allocate", PRAGMA_OMP_ALLOCATE },
|
|
{ "atomic", PRAGMA_OMP_ATOMIC },
|
|
{ "barrier", PRAGMA_OMP_BARRIER },
|
|
{ "cancel", PRAGMA_OMP_CANCEL },
|
|
{ "cancellation", PRAGMA_OMP_CANCELLATION_POINT },
|
|
{ "critical", PRAGMA_OMP_CRITICAL },
|
|
{ "depobj", PRAGMA_OMP_DEPOBJ },
|
|
{ "error", PRAGMA_OMP_ERROR },
|
|
{ "end", PRAGMA_OMP_END_DECLARE_TARGET },
|
|
{ "flush", PRAGMA_OMP_FLUSH },
|
|
{ "nothing", PRAGMA_OMP_NOTHING },
|
|
{ "requires", PRAGMA_OMP_REQUIRES },
|
|
{ "scope", PRAGMA_OMP_SCOPE },
|
|
{ "section", PRAGMA_OMP_SECTION },
|
|
{ "sections", PRAGMA_OMP_SECTIONS },
|
|
{ "single", PRAGMA_OMP_SINGLE },
|
|
{ "task", PRAGMA_OMP_TASK },
|
|
{ "taskgroup", PRAGMA_OMP_TASKGROUP },
|
|
{ "taskwait", PRAGMA_OMP_TASKWAIT },
|
|
{ "taskyield", PRAGMA_OMP_TASKYIELD },
|
|
{ "threadprivate", PRAGMA_OMP_THREADPRIVATE }
|
|
};
|
|
static const struct omp_pragma_def omp_pragmas_simd[] = {
|
|
{ "declare", PRAGMA_OMP_DECLARE },
|
|
{ "distribute", PRAGMA_OMP_DISTRIBUTE },
|
|
{ "for", PRAGMA_OMP_FOR },
|
|
{ "loop", PRAGMA_OMP_LOOP },
|
|
{ "masked", PRAGMA_OMP_MASKED },
|
|
{ "master", PRAGMA_OMP_MASTER },
|
|
{ "ordered", PRAGMA_OMP_ORDERED },
|
|
{ "parallel", PRAGMA_OMP_PARALLEL },
|
|
{ "scan", PRAGMA_OMP_SCAN },
|
|
{ "simd", PRAGMA_OMP_SIMD },
|
|
{ "target", PRAGMA_OMP_TARGET },
|
|
{ "taskloop", PRAGMA_OMP_TASKLOOP },
|
|
{ "teams", PRAGMA_OMP_TEAMS },
|
|
};
|
|
|
|
void
|
|
c_pp_lookup_pragma (unsigned int id, const char **space, const char **name)
|
|
{
|
|
const int n_oacc_pragmas = sizeof (oacc_pragmas) / sizeof (*oacc_pragmas);
|
|
const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
|
|
const int n_omp_pragmas_simd = sizeof (omp_pragmas_simd)
|
|
/ sizeof (*omp_pragmas);
|
|
int i;
|
|
|
|
for (i = 0; i < n_oacc_pragmas; ++i)
|
|
if (oacc_pragmas[i].id == id)
|
|
{
|
|
*space = "acc";
|
|
*name = oacc_pragmas[i].name;
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < n_omp_pragmas; ++i)
|
|
if (omp_pragmas[i].id == id)
|
|
{
|
|
*space = "omp";
|
|
*name = omp_pragmas[i].name;
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < n_omp_pragmas_simd; ++i)
|
|
if (omp_pragmas_simd[i].id == id)
|
|
{
|
|
*space = "omp";
|
|
*name = omp_pragmas_simd[i].name;
|
|
return;
|
|
}
|
|
|
|
if (id >= PRAGMA_FIRST_EXTERNAL
|
|
&& (id < PRAGMA_FIRST_EXTERNAL + registered_pp_pragmas.length ()))
|
|
{
|
|
*space = registered_pp_pragmas[id - PRAGMA_FIRST_EXTERNAL].space;
|
|
*name = registered_pp_pragmas[id - PRAGMA_FIRST_EXTERNAL].name;
|
|
return;
|
|
}
|
|
|
|
gcc_unreachable ();
|
|
}
|
|
|
|
/* Front-end wrappers for pragma registration to avoid dragging
|
|
cpplib.h in almost everywhere. */
|
|
|
|
static void
|
|
c_register_pragma_1 (const char *space, const char *name,
|
|
internal_pragma_handler ihandler, bool allow_expansion)
|
|
{
|
|
unsigned id;
|
|
|
|
if (flag_preprocess_only)
|
|
{
|
|
pragma_ns_name ns_name;
|
|
|
|
if (!allow_expansion)
|
|
return;
|
|
|
|
ns_name.space = space;
|
|
ns_name.name = name;
|
|
registered_pp_pragmas.safe_push (ns_name);
|
|
id = registered_pp_pragmas.length ();
|
|
id += PRAGMA_FIRST_EXTERNAL - 1;
|
|
}
|
|
else
|
|
{
|
|
registered_pragmas.safe_push (ihandler);
|
|
id = registered_pragmas.length ();
|
|
id += PRAGMA_FIRST_EXTERNAL - 1;
|
|
|
|
/* The C front end allocates 8 bits in c_token. The C++ front end
|
|
keeps the pragma kind in the form of INTEGER_CST, so no small
|
|
limit applies. At present this is sufficient. */
|
|
gcc_assert (id < 256);
|
|
}
|
|
|
|
cpp_register_deferred_pragma (parse_in, space, name, id,
|
|
allow_expansion, false);
|
|
}
|
|
|
|
/* Register a C pragma handler, using a space and a name. It disallows pragma
|
|
expansion (if you want it, use c_register_pragma_with_expansion instead). */
|
|
void
|
|
c_register_pragma (const char *space, const char *name,
|
|
pragma_handler_1arg handler)
|
|
{
|
|
internal_pragma_handler ihandler;
|
|
|
|
ihandler.handler.handler_1arg = handler;
|
|
ihandler.extra_data = false;
|
|
ihandler.data = NULL;
|
|
c_register_pragma_1 (space, name, ihandler, false);
|
|
}
|
|
|
|
/* Register a C pragma handler, using a space and a name, it also carries an
|
|
extra data field which can be used by the handler. It disallows pragma
|
|
expansion (if you want it, use c_register_pragma_with_expansion_and_data
|
|
instead). */
|
|
void
|
|
c_register_pragma_with_data (const char *space, const char *name,
|
|
pragma_handler_2arg handler, void * data)
|
|
{
|
|
internal_pragma_handler ihandler;
|
|
|
|
ihandler.handler.handler_2arg = handler;
|
|
ihandler.extra_data = true;
|
|
ihandler.data = data;
|
|
c_register_pragma_1 (space, name, ihandler, false);
|
|
}
|
|
|
|
/* Register a C pragma handler, using a space and a name. It allows pragma
|
|
expansion as in the following example:
|
|
|
|
#define NUMBER 10
|
|
#pragma count (NUMBER)
|
|
|
|
Name expansion is still disallowed. */
|
|
void
|
|
c_register_pragma_with_expansion (const char *space, const char *name,
|
|
pragma_handler_1arg handler)
|
|
{
|
|
internal_pragma_handler ihandler;
|
|
|
|
ihandler.handler.handler_1arg = handler;
|
|
ihandler.extra_data = false;
|
|
ihandler.data = NULL;
|
|
c_register_pragma_1 (space, name, ihandler, true);
|
|
}
|
|
|
|
/* Register a C pragma handler, using a space and a name, it also carries an
|
|
extra data field which can be used by the handler. It allows pragma
|
|
expansion as in the following example:
|
|
|
|
#define NUMBER 10
|
|
#pragma count (NUMBER)
|
|
|
|
Name expansion is still disallowed. */
|
|
void
|
|
c_register_pragma_with_expansion_and_data (const char *space, const char *name,
|
|
pragma_handler_2arg handler,
|
|
void *data)
|
|
{
|
|
internal_pragma_handler ihandler;
|
|
|
|
ihandler.handler.handler_2arg = handler;
|
|
ihandler.extra_data = true;
|
|
ihandler.data = data;
|
|
c_register_pragma_1 (space, name, ihandler, true);
|
|
}
|
|
|
|
void
|
|
c_invoke_pragma_handler (unsigned int id)
|
|
{
|
|
internal_pragma_handler *ihandler;
|
|
pragma_handler_1arg handler_1arg;
|
|
pragma_handler_2arg handler_2arg;
|
|
|
|
id -= PRAGMA_FIRST_EXTERNAL;
|
|
ihandler = ®istered_pragmas[id];
|
|
if (ihandler->extra_data)
|
|
{
|
|
handler_2arg = ihandler->handler.handler_2arg;
|
|
handler_2arg (parse_in, ihandler->data);
|
|
}
|
|
else
|
|
{
|
|
handler_1arg = ihandler->handler.handler_1arg;
|
|
handler_1arg (parse_in);
|
|
}
|
|
}
|
|
|
|
/* Set up front-end pragmas. */
|
|
void
|
|
init_pragma (void)
|
|
{
|
|
if (flag_openacc)
|
|
{
|
|
const int n_oacc_pragmas
|
|
= sizeof (oacc_pragmas) / sizeof (*oacc_pragmas);
|
|
int i;
|
|
|
|
for (i = 0; i < n_oacc_pragmas; ++i)
|
|
cpp_register_deferred_pragma (parse_in, "acc", oacc_pragmas[i].name,
|
|
oacc_pragmas[i].id, true, true);
|
|
}
|
|
|
|
if (flag_openmp)
|
|
{
|
|
const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
|
|
int i;
|
|
|
|
for (i = 0; i < n_omp_pragmas; ++i)
|
|
cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas[i].name,
|
|
omp_pragmas[i].id, true, true);
|
|
}
|
|
if (flag_openmp || flag_openmp_simd)
|
|
{
|
|
const int n_omp_pragmas_simd = sizeof (omp_pragmas_simd)
|
|
/ sizeof (*omp_pragmas);
|
|
int i;
|
|
|
|
for (i = 0; i < n_omp_pragmas_simd; ++i)
|
|
cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas_simd[i].name,
|
|
omp_pragmas_simd[i].id, true, true);
|
|
}
|
|
|
|
if (!flag_preprocess_only)
|
|
cpp_register_deferred_pragma (parse_in, "GCC", "pch_preprocess",
|
|
PRAGMA_GCC_PCH_PREPROCESS, false, false);
|
|
|
|
if (!flag_preprocess_only)
|
|
cpp_register_deferred_pragma (parse_in, "GCC", "ivdep", PRAGMA_IVDEP, false,
|
|
false);
|
|
|
|
if (!flag_preprocess_only)
|
|
cpp_register_deferred_pragma (parse_in, "GCC", "unroll", PRAGMA_UNROLL,
|
|
false, false);
|
|
|
|
#ifdef HANDLE_PRAGMA_PACK_WITH_EXPANSION
|
|
c_register_pragma_with_expansion (0, "pack", handle_pragma_pack);
|
|
#else
|
|
c_register_pragma (0, "pack", handle_pragma_pack);
|
|
#endif
|
|
c_register_pragma (0, "weak", handle_pragma_weak);
|
|
|
|
c_register_pragma ("GCC", "visibility", handle_pragma_visibility);
|
|
|
|
c_register_pragma ("GCC", "diagnostic", handle_pragma_diagnostic);
|
|
c_register_pragma ("GCC", "target", handle_pragma_target);
|
|
c_register_pragma ("GCC", "optimize", handle_pragma_optimize);
|
|
c_register_pragma ("GCC", "push_options", handle_pragma_push_options);
|
|
c_register_pragma ("GCC", "pop_options", handle_pragma_pop_options);
|
|
c_register_pragma ("GCC", "reset_options", handle_pragma_reset_options);
|
|
|
|
c_register_pragma ("STDC", "FLOAT_CONST_DECIMAL64",
|
|
handle_pragma_float_const_decimal64);
|
|
|
|
c_register_pragma_with_expansion (0, "redefine_extname",
|
|
handle_pragma_redefine_extname);
|
|
|
|
c_register_pragma_with_expansion (0, "message", handle_pragma_message);
|
|
|
|
#ifdef REGISTER_TARGET_PRAGMAS
|
|
REGISTER_TARGET_PRAGMAS ();
|
|
#endif
|
|
|
|
global_sso = default_sso;
|
|
c_register_pragma (0, "scalar_storage_order",
|
|
handle_pragma_scalar_storage_order);
|
|
|
|
/* Allow plugins to register their own pragmas. */
|
|
invoke_plugin_callbacks (PLUGIN_PRAGMAS, NULL);
|
|
}
|
|
|
|
#include "gt-c-family-c-pragma.h"
|