/* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
- 2006 Free Software Foundation, Inc.
+ 2006, 2007, 2008 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 2, or (at your option) any later
+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
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
}
else if (token == CPP_NUMBER)
{
+ if (TREE_CODE (x) != INTEGER_CST)
+ GCC_BAD ("invalid constant in %<#pragma pack%> - ignored");
align = TREE_INT_CST_LOW (x);
action = set;
if (pragma_lex (&x) != CPP_CLOSE_PAREN)
}
else if (token == CPP_NUMBER && action == push && align == -1)
{
+ if (TREE_CODE (x) != INTEGER_CST)
+ GCC_BAD ("invalid constant in %<#pragma pack%> - ignored");
align = TREE_INT_CST_LOW (x);
if (align == -1)
action = set;
}
#endif /* HANDLE_PRAGMA_PACK */
+struct def_pragma_macro_value GTY(())
+{
+ struct def_pragma_macro_value *prev;
+ cpp_macro *value;
+};
+
+struct def_pragma_macro GTY(())
+{
+ hashval_t hash;
+ const char *name;
+ struct def_pragma_macro_value value;
+};
+
+static GTY((param_is (struct def_pragma_macro))) htab_t pushed_macro_table;
+
+#ifdef HANDLE_PRAGMA_PUSH_POP_MACRO
+/* Hash table control functions for pushed_macro_table. */
+static hashval_t
+dpm_hash (const void *p)
+{
+ return ((const struct def_pragma_macro *)p)->hash;
+}
+
+static int
+dpm_eq (const void *pa, const void *pb)
+{
+ const struct def_pragma_macro *const a = (const struct def_pragma_macro *) pa,
+ *const b = (const struct def_pragma_macro *) pb;
+ return a->hash == b->hash && strcmp (a->name, b->name) == 0;
+}
+
+/* #pragma push_macro("MACRO_NAME")
+ #pragma pop_macro("MACRO_NAME") */
+
+static void
+handle_pragma_push_macro (cpp_reader *reader)
+{
+ tree x, id = 0;
+ enum cpp_ttype token;
+ struct def_pragma_macro dummy, *c;
+ const char *macroname;
+ void **slot;
+
+ if (pragma_lex (&x) != CPP_OPEN_PAREN)
+ GCC_BAD ("missing %<(%> after %<#pragma push_macro%> - ignored");
+
+ token = pragma_lex (&id);
+
+ /* Silently ignore */
+ if (token == CPP_CLOSE_PAREN)
+ return;
+ if (token != CPP_STRING)
+ GCC_BAD ("invalid constant in %<#pragma push_macro%> - ignored");
+
+ if (pragma_lex (&x) != CPP_CLOSE_PAREN)
+ GCC_BAD ("missing %<)%> after %<#pragma push_macro%> - ignored");
+
+ if (pragma_lex (&x) != CPP_EOF)
+ warning (OPT_Wpragmas, "junk at end of %<#pragma push_macro%>");
+
+ /* Check for empty string, and silently ignore. */
+ if (TREE_STRING_LENGTH (id) < 1)
+ return;
+ macroname = TREE_STRING_POINTER (id);
+
+ if (pushed_macro_table == NULL)
+ pushed_macro_table = htab_create_ggc (15, dpm_hash, dpm_eq, 0);
+
+ dummy.hash = htab_hash_string (macroname);
+ dummy.name = macroname;
+ slot = htab_find_slot_with_hash (pushed_macro_table, &dummy,
+ dummy.hash, INSERT);
+ c = (struct def_pragma_macro *) *slot;
+ if (c == NULL)
+ {
+ *slot = c = GGC_NEW (struct def_pragma_macro);
+ c->hash = dummy.hash;
+ c->name = ggc_alloc_string (macroname, TREE_STRING_LENGTH (id) - 1);
+ c->value.prev = NULL;
+ }
+ else
+ {
+ struct def_pragma_macro_value *v;
+ v = GGC_NEW (struct def_pragma_macro_value);
+ *v = c->value;
+ c->value.prev = v;
+ }
+
+ c->value.value = cpp_push_definition (reader, macroname);
+}
+
+static void
+handle_pragma_pop_macro (cpp_reader *reader)
+{
+ tree x, id = 0;
+ enum cpp_ttype token;
+ struct def_pragma_macro dummy, *c;
+ const char *macroname;
+ void **slot = NULL;
+
+ if (pragma_lex (&x) != CPP_OPEN_PAREN)
+ GCC_BAD ("missing %<(%> after %<#pragma pop_macro%> - ignored");
+
+ token = pragma_lex (&id);
+
+ /* Silently ignore */
+ if (token == CPP_CLOSE_PAREN)
+ return;
+ if (token != CPP_STRING)
+ GCC_BAD ("invalid constant in %<#pragma pop_macro%> - ignored");
+
+ if (pragma_lex (&x) != CPP_CLOSE_PAREN)
+ GCC_BAD ("missing %<)%> after %<#pragma pop_macro%> - ignored");
+
+ if (pragma_lex (&x) != CPP_EOF)
+ warning (OPT_Wpragmas, "junk at end of %<#pragma pop_macro%>");
+
+ /* Check for empty string, and silently ignore. */
+ if (TREE_STRING_LENGTH (id) < 1)
+ return;
+ macroname = TREE_STRING_POINTER (id);
+
+ dummy.hash = htab_hash_string (macroname);
+ dummy.name = macroname;
+ if (pushed_macro_table)
+ slot = htab_find_slot_with_hash (pushed_macro_table, &dummy,
+ dummy.hash, NO_INSERT);
+ if (slot == NULL)
+ return;
+ c = (struct def_pragma_macro *) *slot;
+
+ cpp_pop_definition (reader, c->name, c->value.value);
+
+ if (c->value.prev)
+ c->value = *c->value.prev;
+ else
+ htab_clear_slot (pushed_macro_table, slot);
+}
+#endif /* HANDLE_PRAGMA_PUSH_POP_MACRO */
+
static GTY(()) tree pending_weaks;
#ifdef HANDLE_PRAGMA_WEAK
GCC_BAD ("unknown option after %<#pragma GCC diagnostic%> kind");
}
+/* Parse #pragma GCC target (xxx) to set target specific options. */
+static void
+handle_pragma_target(cpp_reader *ARG_UNUSED(dummy))
+{
+ 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);
+ if (token == CPP_OPEN_PAREN)
+ {
+ close_paren_needed_p = true;
+ token = pragma_lex (&x);
+ }
+
+ if (token != CPP_STRING)
+ {
+ GCC_BAD ("%<#pragma GCC option%> is not a string");
+ return;
+ }
+
+ /* 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 = args;
+ }
+}
+
+/* Handle #pragma GCC optimize to set optimization options. */
+static void
+handle_pragma_optimize (cpp_reader *ARG_UNUSED(dummy))
+{
+ 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");
+ return;
+ }
+
+ /* 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 ();
+ 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. */
+typedef struct opt_stack GTY(())
+{
+ struct opt_stack *prev;
+ tree target_binary;
+ tree target_strings;
+ tree optimize_binary;
+ tree optimize_strings;
+} opt_stack;
+
+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 *ARG_UNUSED(dummy))
+{
+ 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 push_options%>");
+ return;
+ }
+
+ p = GGC_NEW (opt_stack);
+ p->prev = options_stack;
+ options_stack = p;
+
+ /* Save optimization and target flags in binary format. */
+ p->optimize_binary = build_optimization_node ();
+ p->target_binary = build_target_option_node ();
+
+ /* 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 *ARG_UNUSED(dummy))
+{
+ 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;
+ }
+
+ if (p->optimize_binary != optimization_current_node)
+ {
+ tree old_optimize = optimization_current_node;
+ cl_optimization_restore (TREE_OPTIMIZATION (p->optimize_binary));
+ c_cpp_builtins_optimize_pragma (parse_in, old_optimize,
+ p->optimize_binary);
+ optimization_current_node = p->optimize_binary;
+ }
+
+ 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 *ARG_UNUSED(dummy))
+{
+ 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 (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 *ARG_UNUSED(dummy))
+{
+ 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) != CPP_EOF)
+ warning (OPT_Wpragmas, "junk at end of %<#pragma message%>");
+
+ if (TREE_STRING_LENGTH (message) > 1)
+ inform (input_location, "#pragma message: %s", TREE_STRING_POINTER (message));
+}
+
/* A vector of registered pragma callbacks. */
DEF_VEC_O (pragma_handler);
static VEC(pragma_handler, heap) *registered_pragmas;
+typedef struct
+{
+ const char *space;
+ const char *name;
+} pragma_ns_name;
+
+DEF_VEC_O (pragma_ns_name);
+DEF_VEC_ALLOC_O (pragma_ns_name, heap);
+
+static VEC(pragma_ns_name, heap) *registered_pp_pragmas;
+
+struct omp_pragma_def { const char *name; unsigned int id; };
+static const struct omp_pragma_def omp_pragmas[] = {
+ { "atomic", PRAGMA_OMP_ATOMIC },
+ { "barrier", PRAGMA_OMP_BARRIER },
+ { "critical", PRAGMA_OMP_CRITICAL },
+ { "flush", PRAGMA_OMP_FLUSH },
+ { "for", PRAGMA_OMP_FOR },
+ { "master", PRAGMA_OMP_MASTER },
+ { "ordered", PRAGMA_OMP_ORDERED },
+ { "parallel", PRAGMA_OMP_PARALLEL },
+ { "section", PRAGMA_OMP_SECTION },
+ { "sections", PRAGMA_OMP_SECTIONS },
+ { "single", PRAGMA_OMP_SINGLE },
+ { "task", PRAGMA_OMP_TASK },
+ { "taskwait", PRAGMA_OMP_TASKWAIT },
+ { "threadprivate", PRAGMA_OMP_THREADPRIVATE }
+};
+
+void
+c_pp_lookup_pragma (unsigned int id, const char **space, const char **name)
+{
+ const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
+ int i;
+
+ for (i = 0; i < n_omp_pragmas; ++i)
+ if (omp_pragmas[i].id == id)
+ {
+ *space = "omp";
+ *name = omp_pragmas[i].name;
+ return;
+ }
+
+ if (id >= PRAGMA_FIRST_EXTERNAL
+ && (id < PRAGMA_FIRST_EXTERNAL
+ + VEC_length (pragma_ns_name, registered_pp_pragmas)))
+ {
+ *space = VEC_index (pragma_ns_name, registered_pp_pragmas,
+ id - PRAGMA_FIRST_EXTERNAL)->space;
+ *name = VEC_index (pragma_ns_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. */
{
unsigned id;
- VEC_safe_push (pragma_handler, heap, registered_pragmas, &handler);
- id = VEC_length (pragma_handler, registered_pragmas);
- id += PRAGMA_FIRST_EXTERNAL - 1;
+ if (flag_preprocess_only)
+ {
+ pragma_ns_name ns_name;
+
+ if (!allow_expansion)
+ return;
+
+ ns_name.space = space;
+ ns_name.name = name;
+ VEC_safe_push (pragma_ns_name, heap, registered_pp_pragmas, &ns_name);
+ id = VEC_length (pragma_ns_name, registered_pp_pragmas);
+ id += PRAGMA_FIRST_EXTERNAL - 1;
+ }
+ else
+ {
+ VEC_safe_push (pragma_handler, heap, registered_pragmas, &handler);
+ id = VEC_length (pragma_handler, registered_pragmas);
+ id += PRAGMA_FIRST_EXTERNAL - 1;
- /* The C++ front end allocates 6 bits in cp_token; the C front end
- allocates 7 bits in c_token. At present this is sufficient. */
- gcc_assert (id < 64);
+ /* The C++ front end allocates 6 bits in cp_token; the C front end
+ allocates 7 bits in c_token. At present this is sufficient. */
+ gcc_assert (id < 64);
+ }
cpp_register_deferred_pragma (parse_in, space, name, id,
allow_expansion, false);
void
init_pragma (void)
{
- if (flag_openmp && !flag_preprocess_only)
- {
- struct omp_pragma_def { const char *name; unsigned int id; };
- static const struct omp_pragma_def omp_pragmas[] = {
- { "atomic", PRAGMA_OMP_ATOMIC },
- { "barrier", PRAGMA_OMP_BARRIER },
- { "critical", PRAGMA_OMP_CRITICAL },
- { "flush", PRAGMA_OMP_FLUSH },
- { "for", PRAGMA_OMP_FOR },
- { "master", PRAGMA_OMP_MASTER },
- { "ordered", PRAGMA_OMP_ORDERED },
- { "parallel", PRAGMA_OMP_PARALLEL },
- { "section", PRAGMA_OMP_SECTION },
- { "sections", PRAGMA_OMP_SECTIONS },
- { "single", PRAGMA_OMP_SINGLE },
- { "threadprivate", PRAGMA_OMP_THREADPRIVATE }
- };
-
+ if (flag_openmp)
+ {
const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
int i;
omp_pragmas[i].id, true, true);
}
- 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", "pch_preprocess",
+ PRAGMA_GCC_PCH_PREPROCESS, false, false);
#ifdef HANDLE_PRAGMA_PACK
#ifdef HANDLE_PRAGMA_PACK_WITH_EXPANSION
c_register_pragma (0, "pack", handle_pragma_pack);
#endif
#endif
+#ifdef HANDLE_PRAGMA_PUSH_POP_MACRO
+ c_register_pragma (0 ,"push_macro", handle_pragma_push_macro);
+ c_register_pragma (0 ,"pop_macro", handle_pragma_pop_macro);
+#endif
#ifdef HANDLE_PRAGMA_WEAK
c_register_pragma (0, "weak", handle_pragma_weak);
#endif
#endif
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_with_expansion (0, "redefine_extname", handle_pragma_redefine_extname);
c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
+ c_register_pragma_with_expansion (0, "message", handle_pragma_message);
+
#ifdef REGISTER_TARGET_PRAGMAS
REGISTER_TARGET_PRAGMAS ();
#endif
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