#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "intl.h"
#include "tree.h"
#include "flags.h"
#include "output.h"
#include "c-pragma.h"
#include "rtl.h"
#include "ggc.h"
#include "varray.h"
#include "expr.h"
#include "c-common.h"
#include "diagnostic.h"
#include "tm_p.h"
#include "obstack.h"
#include "cpplib.h"
#include "target.h"
#include "langhooks.h"
#include "tree-inline.h"
#include "c-tree.h"
#include "toplev.h"
#include "tree-iterator.h"
#include "hashtab.h"
#include "tree-mudflap.h"
#include "opts.h"
cpp_reader *parse_in;
#ifndef SIZE_TYPE
#define SIZE_TYPE "long unsigned int"
#endif
#ifndef PID_TYPE
#define PID_TYPE "int"
#endif
#ifndef WCHAR_TYPE
#define WCHAR_TYPE "int"
#endif
#define MODIFIED_WCHAR_TYPE \
(flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
#ifndef PTRDIFF_TYPE
#define PTRDIFF_TYPE "long int"
#endif
#ifndef WINT_TYPE
#define WINT_TYPE "unsigned int"
#endif
#ifndef INTMAX_TYPE
#define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
? "int" \
: ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
? "long int" \
: "long long int"))
#endif
#ifndef UINTMAX_TYPE
#define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
? "unsigned int" \
: ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
? "long unsigned int" \
: "long long unsigned int"))
#endif
tree c_global_trees[CTI_MAX];
bool statement_code_p[MAX_TREE_CODES];
int flag_preprocess_only;
char flag_no_line_commands;
char flag_no_output;
char flag_dump_macros;
char flag_dump_includes;
bool flag_pch_preprocess;
const char *pch_file;
int flag_iso;
int flag_undef;
int flag_no_builtin;
int flag_no_nonansi_builtin;
int flag_short_double;
int flag_short_wchar;
int flag_ms_extensions;
int flag_no_asm;
int flag_cw_asm_blocks;
int flag_const_strings;
int flag_signed_bitfields = 1;
int explicit_flag_signed_bitfields;
int warn_write_strings;
int warn_unknown_pragmas;
int warn_format;
int flag_nil_receivers = 1;
int flag_objc_exceptions = 0;
int flag_objc_sjlj_exceptions = -1;
int flag_zero_link = 0;
int flag_replace_objc_classes = 0;
int flag_cond_mismatch;
int flag_isoc94;
int flag_isoc99;
int flag_hosted = 1;
int warn_main;
int disable_typechecking_for_spec_flag;
int flag_gen_declaration;
#ifdef NEXT_OBJC_RUNTIME
int flag_next_runtime = 1;
#else
int flag_next_runtime = 0;
#endif
int flag_objc_call_cxx_cdtors = 0;
int print_struct_values;
const char *constant_string_class_name;
int flag_no_gnu_keywords;
int flag_implement_inlines = 1;
int flag_implicit_templates = 1;
int flag_implicit_inline_templates = 1;
int flag_use_repository;
int flag_optional_diags = 1;
int flag_elide_constructors = 1;
int flag_default_inline = 1;
int flag_rtti = 1;
int flag_conserve_space;
int flag_access_control = 1;
int flag_check_new;
int flag_new_for_scope = 1;
int flag_weak = 1;
int flag_working_directory = -1;
int flag_use_cxa_atexit = DEFAULT_USE_CXA_ATEXIT;
int flag_permissive;
int flag_enforce_eh_specs = 1;
int flag_preprocessed = 0;
int flag_clone_structors = 0;
int flag_threadsafe_statics = 1;
int warn_implicit = 1;
int max_tinst_depth = 500;
tree *ridpointers;
tree (*make_fname_decl) (tree, int);
int (*lang_statement_code_p) (enum tree_code);
void (*lang_expand_function_end) (void);
int skip_evaluation;
struct fname_var_t
{
tree *const decl;
const unsigned rid;
const int pretty;
};
const struct fname_var_t fname_vars[] =
{
{&c99_function_name_decl_node, RID_C99_FUNCTION_NAME, 0},
{&function_name_decl_node, RID_FUNCTION_NAME, 0},
{&pretty_function_name_decl_node, RID_PRETTY_FUNCTION_NAME, 1},
{NULL, 0, 0},
};
static int constant_fits_type_p (tree, tree);
static tree check_case_value (tree);
static bool check_case_bounds (tree, tree, tree *, tree *);
enum cw_asm_states cw_asm_state = cw_asm_none;
int cw_asm_in_decl;
int cw_asm_block;
int cw_asm_at_bol;
int cw_asm_in_operands;
int cw_asm_labelno;
int cw_asm_lineno;
static char *cw_asm_buffer;
static GTY(()) varray_type cw_asm_operands;
static GTY(()) varray_type cw_asm_labels;
static GTY(()) varray_type cw_asm_labels_uniq;
static void print_cw_asm_operand (char *, tree);
static int cw_asm_get_register_var (tree);
static tree handle_packed_attribute (tree *, tree, tree, int, bool *);
static tree handle_nocommon_attribute (tree *, tree, tree, int, bool *);
static tree handle_common_attribute (tree *, tree, tree, int, bool *);
static tree handle_noreturn_attribute (tree *, tree, tree, int, bool *);
static tree handle_noinline_attribute (tree *, tree, tree, int, bool *);
static tree handle_always_inline_attribute (tree *, tree, tree, int,
bool *);
static tree handle_used_attribute (tree *, tree, tree, int, bool *);
static tree handle_unused_attribute (tree *, tree, tree, int, bool *);
static tree handle_const_attribute (tree *, tree, tree, int, bool *);
static tree handle_transparent_union_attribute (tree *, tree, tree,
int, bool *);
static tree handle_constructor_attribute (tree *, tree, tree, int, bool *);
static tree handle_destructor_attribute (tree *, tree, tree, int, bool *);
static tree handle_mode_attribute (tree *, tree, tree, int, bool *);
static tree handle_section_attribute (tree *, tree, tree, int, bool *);
static tree handle_aligned_attribute (tree *, tree, tree, int, bool *);
static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ;
static tree handle_alias_attribute (tree *, tree, tree, int, bool *);
static tree handle_visibility_attribute (tree *, tree, tree, int,
bool *);
static tree handle_tls_model_attribute (tree *, tree, tree, int,
bool *);
static tree handle_no_instrument_function_attribute (tree *, tree,
tree, int, bool *);
static tree handle_malloc_attribute (tree *, tree, tree, int, bool *);
static tree handle_no_limit_stack_attribute (tree *, tree, tree, int,
bool *);
static tree handle_pure_attribute (tree *, tree, tree, int, bool *);
static tree handle_deprecated_attribute (tree *, tree, tree, int,
bool *);
static tree handle_unavailable_attribute (tree *, tree, tree, int, bool *);
static tree handle_vector_size_attribute (tree *, tree, tree, int,
bool *);
static tree handle_nonnull_attribute (tree *, tree, tree, int, bool *);
static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *);
static tree handle_cleanup_attribute (tree *, tree, tree, int, bool *);
static tree handle_warn_unused_result_attribute (tree *, tree, tree, int,
bool *);
static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *);
static void check_function_nonnull (tree, tree);
static void check_nonnull_arg (void *, tree, unsigned HOST_WIDE_INT);
static bool nonnull_check_p (tree, unsigned HOST_WIDE_INT);
static bool get_nonnull_operand (tree, unsigned HOST_WIDE_INT *);
static int resort_field_decl_cmp (const void *, const void *);
const struct attribute_spec c_common_attribute_table[] =
{
{ "packed", 0, 0, false, false, false,
handle_packed_attribute },
{ "nocommon", 0, 0, true, false, false,
handle_nocommon_attribute },
{ "common", 0, 0, true, false, false,
handle_common_attribute },
{ "noreturn", 0, 0, true, false, false,
handle_noreturn_attribute },
{ "volatile", 0, 0, true, false, false,
handle_noreturn_attribute },
{ "noinline", 0, 0, true, false, false,
handle_noinline_attribute },
{ "always_inline", 0, 0, true, false, false,
handle_always_inline_attribute },
{ "used", 0, 0, true, false, false,
handle_used_attribute },
{ "unused", 0, 0, false, false, false,
handle_unused_attribute },
{ "const", 0, 0, true, false, false,
handle_const_attribute },
{ "transparent_union", 0, 0, false, false, false,
handle_transparent_union_attribute },
{ "constructor", 0, 0, true, false, false,
handle_constructor_attribute },
{ "destructor", 0, 0, true, false, false,
handle_destructor_attribute },
{ "mode", 1, 1, false, true, false,
handle_mode_attribute },
{ "section", 1, 1, true, false, false,
handle_section_attribute },
{ "aligned", 0, 1, false, false, false,
handle_aligned_attribute },
{ "weak", 0, 0, true, false, false,
handle_weak_attribute },
{ "alias", 1, 1, true, false, false,
handle_alias_attribute },
{ "no_instrument_function", 0, 0, true, false, false,
handle_no_instrument_function_attribute },
{ "malloc", 0, 0, true, false, false,
handle_malloc_attribute },
{ "no_stack_limit", 0, 0, true, false, false,
handle_no_limit_stack_attribute },
{ "pure", 0, 0, true, false, false,
handle_pure_attribute },
{ "deprecated", 0, 0, false, false, false,
handle_deprecated_attribute },
{ "unavailable", 0, 0, false, false, false,
handle_unavailable_attribute },
{ "vector_size", 1, 1, false, true, false,
handle_vector_size_attribute },
{ "visibility", 1, 1, false, false, false,
handle_visibility_attribute },
{ "tls_model", 1, 1, true, false, false,
handle_tls_model_attribute },
{ "nonnull", 0, -1, false, true, true,
handle_nonnull_attribute },
{ "nothrow", 0, 0, true, false, false,
handle_nothrow_attribute },
{ "may_alias", 0, 0, false, true, false, NULL },
{ "cleanup", 1, 1, true, false, false,
handle_cleanup_attribute },
{ "warn_unused_result", 0, 0, false, true, true,
handle_warn_unused_result_attribute },
{ "sentinel", 0, 1, false, true, true,
handle_sentinel_attribute },
{ NULL, 0, 0, false, false, false, NULL }
};
const struct attribute_spec c_common_format_attribute_table[] =
{
{ "format", 3, 3, false, true, true,
handle_format_attribute },
{ "format_arg", 1, 1, false, true, true,
handle_format_arg_attribute },
{ NULL, 0, 0, false, false, false, NULL }
};
void
start_fname_decls (void)
{
unsigned ix;
tree saved = NULL_TREE;
for (ix = 0; fname_vars[ix].decl; ix++)
{
tree decl = *fname_vars[ix].decl;
if (decl)
{
saved = tree_cons (decl, build_int_cst (NULL_TREE, ix), saved);
*fname_vars[ix].decl = NULL_TREE;
}
}
if (saved || saved_function_name_decls)
saved_function_name_decls = tree_cons (saved, NULL_TREE,
saved_function_name_decls);
}
void
finish_fname_decls (void)
{
unsigned ix;
tree stmts = NULL_TREE;
tree stack = saved_function_name_decls;
for (; stack && TREE_VALUE (stack); stack = TREE_CHAIN (stack))
append_to_statement_list (TREE_VALUE (stack), &stmts);
if (stmts)
{
tree *bodyp = &DECL_SAVED_TREE (current_function_decl);
if (TREE_CODE (*bodyp) == BIND_EXPR)
bodyp = &BIND_EXPR_BODY (*bodyp);
append_to_statement_list (*bodyp, &stmts);
*bodyp = stmts;
}
for (ix = 0; fname_vars[ix].decl; ix++)
*fname_vars[ix].decl = NULL_TREE;
if (stack)
{
tree saved;
for (saved = TREE_PURPOSE (stack); saved; saved = TREE_CHAIN (saved))
{
tree decl = TREE_PURPOSE (saved);
unsigned ix = TREE_INT_CST_LOW (TREE_VALUE (saved));
*fname_vars[ix].decl = decl;
}
stack = TREE_CHAIN (stack);
}
saved_function_name_decls = stack;
}
const char *
fname_as_string (int pretty_p)
{
const char *name = "top level";
char *namep;
int vrb = 2;
if (! pretty_p)
{
name = "";
vrb = 0;
}
if (current_function_decl)
name = lang_hooks.decl_printable_name (current_function_decl, vrb);
if (c_lex_string_translate)
{
int len = strlen (name) + 3;
cpp_string cstr = { 0, 0 }, strname;
namep = XNEWVEC (char, len);
snprintf (namep, len, "\"%s\"", name);
strname.text = (unsigned char *) namep;
strname.len = len - 1;
if (cpp_interpret_string (parse_in, &strname, 1, &cstr, false, false))
return (char *) cstr.text;
}
else
namep = xstrdup (name);
return namep;
}
int
c_expand_decl (tree decl)
{
if (TREE_CODE (decl) == VAR_DECL && !TREE_STATIC (decl))
{
if (!anon_aggr_type_p (TREE_TYPE (decl)))
emit_local_var (decl);
else
expand_anon_union_decl (decl, NULL_TREE,
DECL_ANON_UNION_ELEMS (decl));
}
else
return 0;
return 1;
}
tree
fname_decl (unsigned int rid, tree id)
{
unsigned ix;
tree decl = NULL_TREE;
for (ix = 0; fname_vars[ix].decl; ix++)
if (fname_vars[ix].rid == rid)
break;
decl = *fname_vars[ix].decl;
if (!decl)
{
tree stmts;
location_t saved_location = input_location;
#ifdef USE_MAPPED_LOCATION
input_location = UNKNOWN_LOCATION;
#else
input_line = 0;
#endif
stmts = push_stmt_list ();
decl = (*make_fname_decl) (id, fname_vars[ix].pretty);
stmts = pop_stmt_list (stmts);
if (!IS_EMPTY_STMT (stmts))
saved_function_name_decls
= tree_cons (decl, stmts, saved_function_name_decls);
*fname_vars[ix].decl = decl;
input_location = saved_location;
}
if (!ix && !current_function_decl)
pedwarn ("%J%qD is not defined outside of function scope", decl, decl);
return decl;
}
tree
fix_string_type (tree value)
{
const int wchar_bytes = TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT;
const int wide_flag = TREE_TYPE (value) == wchar_array_type_node;
const int pascal_flag = TREE_TYPE (value) == pascal_string_type_node;
const int nchars_max = flag_isoc99 ? 4095 : 509;
int length = TREE_STRING_LENGTH (value);
int nchars;
tree e_type, i_type, a_type;
nchars = wide_flag ? length / wchar_bytes : length;
if (pedantic && nchars - 1 > nchars_max && !c_dialect_cxx ())
pedwarn ("string length %qd is greater than the length %qd ISO C%d compilers are required to support",
nchars - 1, nchars_max, flag_isoc99 ? 99 : 89);
e_type = wide_flag ? wchar_type_node : (pascal_flag ? unsigned_char_type_node : char_type_node);
i_type = build_index_type (build_int_cst (NULL_TREE, nchars - 1));
a_type = build_array_type (e_type, i_type);
if (flag_const_strings && ! flag_writable_strings)
{
tree qa_type = c_build_qualified_type (a_type, TYPE_QUAL_CONST);
TYPE_MAIN_VARIANT (qa_type) = a_type;
a_type = qa_type;
}
TREE_TYPE (value) = a_type;
TREE_CONSTANT (value) = !flag_writable_strings;
TREE_INVARIANT (value) = !flag_writable_strings;
TREE_READONLY (value) = !flag_writable_strings;
TREE_STATIC (value) = 1;
return value;
}
void
constant_expression_warning (tree value)
{
if ((TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST
|| TREE_CODE (value) == VECTOR_CST
|| TREE_CODE (value) == COMPLEX_CST)
&& TREE_CONSTANT_OVERFLOW (value) && pedantic)
pedwarn ("overflow in constant expression");
}
void
overflow_warning (tree value)
{
if ((TREE_CODE (value) == INTEGER_CST
|| (TREE_CODE (value) == COMPLEX_CST
&& TREE_CODE (TREE_REALPART (value)) == INTEGER_CST))
&& TREE_OVERFLOW (value))
{
TREE_OVERFLOW (value) = 0;
if (skip_evaluation == 0)
warning ("integer overflow in expression");
}
else if ((TREE_CODE (value) == REAL_CST
|| (TREE_CODE (value) == COMPLEX_CST
&& TREE_CODE (TREE_REALPART (value)) == REAL_CST))
&& TREE_OVERFLOW (value))
{
TREE_OVERFLOW (value) = 0;
if (skip_evaluation == 0)
warning ("floating point overflow in expression");
}
else if (TREE_CODE (value) == VECTOR_CST && TREE_OVERFLOW (value))
{
TREE_OVERFLOW (value) = 0;
if (skip_evaluation == 0)
warning ("vector overflow in expression");
}
}
void
unsigned_conversion_warning (tree result, tree operand)
{
tree type = TREE_TYPE (result);
if (TREE_CODE (operand) == INTEGER_CST
&& TREE_CODE (type) == INTEGER_TYPE
&& TYPE_UNSIGNED (type)
&& skip_evaluation == 0
&& !int_fits_type_p (operand, type))
{
if (!int_fits_type_p (operand, c_common_signed_type (type)))
warning ("large integer implicitly truncated to unsigned type");
else if (warn_conversion)
warning ("negative integer implicitly converted to unsigned type");
}
}
static int
constant_fits_type_p (tree c, tree type)
{
if (TREE_CODE (c) == INTEGER_CST)
return int_fits_type_p (c, type);
c = convert (type, c);
return !TREE_OVERFLOW (c);
}
int
vector_types_convertible_p (tree t1, tree t2)
{
return targetm.vector_opaque_p (t1)
|| targetm.vector_opaque_p (t2)
|| (tree_int_cst_equal (TYPE_SIZE (t1), TYPE_SIZE (t2))
&& INTEGRAL_TYPE_P (TREE_TYPE (t1))
== INTEGRAL_TYPE_P (TREE_TYPE (t2)));
}
tree
convert_and_check (tree type, tree expr)
{
tree t = convert (type, expr);
if (TREE_CODE (t) == INTEGER_CST)
{
if (TREE_OVERFLOW (t))
{
TREE_OVERFLOW (t) = 0;
TREE_CONSTANT_OVERFLOW (t) = TREE_CONSTANT_OVERFLOW (expr);
if (!(TYPE_UNSIGNED (type) < TYPE_UNSIGNED (TREE_TYPE (expr))
&& TREE_CODE (TREE_TYPE (expr)) == INTEGER_TYPE
&& TYPE_PRECISION (type) == TYPE_PRECISION (TREE_TYPE (expr))))
if ((pedantic
|| TYPE_UNSIGNED (type)
|| ! constant_fits_type_p (expr,
c_common_unsigned_type (type)))
&& skip_evaluation == 0)
warning ("overflow in implicit constant conversion");
}
else
unsigned_conversion_warning (t, expr);
}
return t;
}
struct tlist
{
struct tlist *next;
tree expr, writer;
};
struct tlist_cache
{
struct tlist_cache *next;
struct tlist *cache_before_sp;
struct tlist *cache_after_sp;
tree expr;
};
static struct obstack tlist_obstack;
static char *tlist_firstobj = 0;
static struct tlist *warned_ids;
static struct tlist_cache *save_expr_cache;
static void add_tlist (struct tlist **, struct tlist *, tree, int);
static void merge_tlist (struct tlist **, struct tlist *, int);
static void verify_tree (tree, struct tlist **, struct tlist **, tree);
static int warning_candidate_p (tree);
static void warn_for_collisions (struct tlist *);
static void warn_for_collisions_1 (tree, tree, struct tlist *, int);
static struct tlist *new_tlist (struct tlist *, tree, tree);
static struct tlist *
new_tlist (struct tlist *next, tree t, tree writer)
{
struct tlist *l;
l = XOBNEW (&tlist_obstack, struct tlist);
l->next = next;
l->expr = t;
l->writer = writer;
return l;
}
static void
add_tlist (struct tlist **to, struct tlist *add, tree exclude_writer, int copy)
{
while (add)
{
struct tlist *next = add->next;
if (! copy)
add->next = *to;
if (! exclude_writer || add->writer != exclude_writer)
*to = copy ? new_tlist (*to, add->expr, add->writer) : add;
add = next;
}
}
static void
merge_tlist (struct tlist **to, struct tlist *add, int copy)
{
struct tlist **end = to;
while (*end)
end = &(*end)->next;
while (add)
{
int found = 0;
struct tlist *tmp2;
struct tlist *next = add->next;
for (tmp2 = *to; tmp2; tmp2 = tmp2->next)
if (tmp2->expr == add->expr)
{
found = 1;
if (! tmp2->writer)
tmp2->writer = add->writer;
}
if (! found)
{
*end = copy ? add : new_tlist (NULL, add->expr, add->writer);
end = &(*end)->next;
*end = 0;
}
add = next;
}
}
static void
warn_for_collisions_1 (tree written, tree writer, struct tlist *list,
int only_writes)
{
struct tlist *tmp;
for (tmp = warned_ids; tmp; tmp = tmp->next)
if (tmp->expr == written)
return;
while (list)
{
if (list->expr == written
&& list->writer != writer
&& (! only_writes || list->writer)
&& DECL_NAME (list->expr))
{
warned_ids = new_tlist (warned_ids, written, NULL_TREE);
warning ("operation on %qs may be undefined",
IDENTIFIER_POINTER (DECL_NAME (list->expr)));
}
list = list->next;
}
}
static void
warn_for_collisions (struct tlist *list)
{
struct tlist *tmp;
for (tmp = list; tmp; tmp = tmp->next)
{
if (tmp->writer)
warn_for_collisions_1 (tmp->expr, tmp->writer, list, 0);
}
}
static int
warning_candidate_p (tree x)
{
return TREE_CODE (x) == VAR_DECL || TREE_CODE (x) == PARM_DECL;
}
static void
verify_tree (tree x, struct tlist **pbefore_sp, struct tlist **pno_sp,
tree writer)
{
struct tlist *tmp_before, *tmp_nosp, *tmp_list2, *tmp_list3;
enum tree_code code;
enum tree_code_class cl;
if (x == NULL)
return;
restart:
code = TREE_CODE (x);
cl = TREE_CODE_CLASS (code);
if (warning_candidate_p (x))
{
*pno_sp = new_tlist (*pno_sp, x, writer);
return;
}
switch (code)
{
case CONSTRUCTOR:
return;
case COMPOUND_EXPR:
case TRUTH_ANDIF_EXPR:
case TRUTH_ORIF_EXPR:
tmp_before = tmp_nosp = tmp_list3 = 0;
verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE);
warn_for_collisions (tmp_nosp);
merge_tlist (pbefore_sp, tmp_before, 0);
merge_tlist (pbefore_sp, tmp_nosp, 0);
verify_tree (TREE_OPERAND (x, 1), &tmp_list3, pno_sp, NULL_TREE);
merge_tlist (pbefore_sp, tmp_list3, 0);
return;
case COND_EXPR:
tmp_before = tmp_list2 = 0;
verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_list2, NULL_TREE);
warn_for_collisions (tmp_list2);
merge_tlist (pbefore_sp, tmp_before, 0);
merge_tlist (pbefore_sp, tmp_list2, 1);
tmp_list3 = tmp_nosp = 0;
verify_tree (TREE_OPERAND (x, 1), &tmp_list3, &tmp_nosp, NULL_TREE);
warn_for_collisions (tmp_nosp);
merge_tlist (pbefore_sp, tmp_list3, 0);
tmp_list3 = tmp_list2 = 0;
verify_tree (TREE_OPERAND (x, 2), &tmp_list3, &tmp_list2, NULL_TREE);
warn_for_collisions (tmp_list2);
merge_tlist (pbefore_sp, tmp_list3, 0);
merge_tlist (&tmp_nosp, tmp_list2, 0);
add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0);
return;
case PREDECREMENT_EXPR:
case PREINCREMENT_EXPR:
case POSTDECREMENT_EXPR:
case POSTINCREMENT_EXPR:
verify_tree (TREE_OPERAND (x, 0), pno_sp, pno_sp, x);
return;
case MODIFY_EXPR:
tmp_before = tmp_nosp = tmp_list3 = 0;
verify_tree (TREE_OPERAND (x, 1), &tmp_before, &tmp_nosp, NULL_TREE);
verify_tree (TREE_OPERAND (x, 0), &tmp_list3, &tmp_list3, x);
add_tlist (&tmp_before, tmp_list3, x, 1);
warn_for_collisions (tmp_before);
add_tlist (pno_sp, tmp_list3, x, 0);
warn_for_collisions_1 (TREE_OPERAND (x, 0), x, tmp_nosp, 1);
merge_tlist (pbefore_sp, tmp_before, 0);
if (warning_candidate_p (TREE_OPERAND (x, 0)))
merge_tlist (&tmp_nosp, new_tlist (NULL, TREE_OPERAND (x, 0), x), 0);
add_tlist (pno_sp, tmp_nosp, NULL_TREE, 1);
return;
case CALL_EXPR:
tmp_before = tmp_nosp = tmp_list2 = tmp_list3 = 0;
verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE);
if (TREE_OPERAND (x, 1))
verify_tree (TREE_OPERAND (x, 1), &tmp_list2, &tmp_list3, NULL_TREE);
merge_tlist (&tmp_list3, tmp_list2, 0);
add_tlist (&tmp_before, tmp_list3, NULL_TREE, 0);
add_tlist (&tmp_before, tmp_nosp, NULL_TREE, 0);
warn_for_collisions (tmp_before);
add_tlist (pbefore_sp, tmp_before, NULL_TREE, 0);
return;
case TREE_LIST:
while (x)
{
tmp_before = tmp_nosp = 0;
verify_tree (TREE_VALUE (x), &tmp_before, &tmp_nosp, NULL_TREE);
merge_tlist (&tmp_nosp, tmp_before, 0);
add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0);
x = TREE_CHAIN (x);
}
return;
case SAVE_EXPR:
{
struct tlist_cache *t;
for (t = save_expr_cache; t; t = t->next)
if (t->expr == x)
break;
if (! t)
{
t = XOBNEW (&tlist_obstack, struct tlist_cache);
t->next = save_expr_cache;
t->expr = x;
save_expr_cache = t;
tmp_before = tmp_nosp = 0;
verify_tree (TREE_OPERAND (x, 0), &tmp_before, &tmp_nosp, NULL_TREE);
warn_for_collisions (tmp_nosp);
tmp_list3 = 0;
while (tmp_nosp)
{
struct tlist *t = tmp_nosp;
tmp_nosp = t->next;
merge_tlist (&tmp_list3, t, 0);
}
t->cache_before_sp = tmp_before;
t->cache_after_sp = tmp_list3;
}
merge_tlist (pbefore_sp, t->cache_before_sp, 1);
add_tlist (pno_sp, t->cache_after_sp, NULL_TREE, 1);
return;
}
default:
if (cl == tcc_unary)
{
if (first_rtl_op (code) == 0)
return;
x = TREE_OPERAND (x, 0);
writer = 0;
goto restart;
}
else if (IS_EXPR_CODE_CLASS (cl))
{
int lp;
int max = first_rtl_op (TREE_CODE (x));
for (lp = 0; lp < max; lp++)
{
tmp_before = tmp_nosp = 0;
verify_tree (TREE_OPERAND (x, lp), &tmp_before, &tmp_nosp, 0);
merge_tlist (&tmp_nosp, tmp_before, 0);
add_tlist (pno_sp, tmp_nosp, NULL_TREE, 0);
}
}
return;
}
}
void
verify_sequence_points (tree expr)
{
struct tlist *before_sp = 0, *after_sp = 0;
warned_ids = 0;
save_expr_cache = 0;
if (tlist_firstobj == 0)
{
gcc_obstack_init (&tlist_obstack);
tlist_firstobj = (char *) obstack_alloc (&tlist_obstack, 0);
}
verify_tree (expr, &before_sp, &after_sp, 0);
warn_for_collisions (after_sp);
obstack_free (&tlist_obstack, tlist_firstobj);
}
static tree
check_case_value (tree value)
{
if (value == NULL_TREE)
return value;
STRIP_TYPE_NOPS (value);
if (c_dialect_cxx ())
{
value = decl_constant_value (value);
STRIP_TYPE_NOPS (value);
value = fold (value);
}
if (TREE_CODE (value) != INTEGER_CST
&& value != error_mark_node)
{
error ("case label does not reduce to an integer constant");
value = error_mark_node;
}
else
value = default_conversion (value);
constant_expression_warning (value);
return value;
}
static bool
check_case_bounds (tree type, tree orig_type,
tree *case_low_p, tree *case_high_p)
{
tree min_value, max_value;
tree case_low = *case_low_p;
tree case_high = case_high_p ? *case_high_p : case_low;
if (orig_type == error_mark_node)
return true;
min_value = TYPE_MIN_VALUE (orig_type);
max_value = TYPE_MAX_VALUE (orig_type);
if (tree_int_cst_compare (case_low, min_value) < 0
&& tree_int_cst_compare (case_high, min_value) < 0)
{
warning ("case label value is less than minimum value for type");
return false;
}
if (tree_int_cst_compare (case_low, max_value) > 0
&& tree_int_cst_compare (case_high, max_value) > 0)
{
warning ("case label value exceeds maximum value for type");
return false;
}
if (tree_int_cst_compare (case_high, min_value) >= 0
&& tree_int_cst_compare (case_low, min_value) < 0)
{
warning ("lower value in case label range"
" less than minimum value for type");
case_low = min_value;
}
if (tree_int_cst_compare (case_low, max_value) <= 0
&& tree_int_cst_compare (case_high, max_value) > 0)
{
warning ("upper value in case label range"
" exceeds maximum value for type");
case_high = max_value;
}
if (*case_low_p != case_low)
*case_low_p = convert (type, case_low);
if (case_high_p && *case_high_p != case_high)
*case_high_p = convert (type, case_high);
return true;
}
tree
c_common_type_for_size (unsigned int bits, int unsignedp)
{
if (bits == TYPE_PRECISION (integer_type_node))
return unsignedp ? unsigned_type_node : integer_type_node;
if (bits == TYPE_PRECISION (signed_char_type_node))
return unsignedp ? unsigned_char_type_node : signed_char_type_node;
if (bits == TYPE_PRECISION (short_integer_type_node))
return unsignedp ? short_unsigned_type_node : short_integer_type_node;
if (bits == TYPE_PRECISION (long_integer_type_node))
return unsignedp ? long_unsigned_type_node : long_integer_type_node;
if (bits == TYPE_PRECISION (long_long_integer_type_node))
return (unsignedp ? long_long_unsigned_type_node
: long_long_integer_type_node);
if (bits == TYPE_PRECISION (widest_integer_literal_type_node))
return (unsignedp ? widest_unsigned_literal_type_node
: widest_integer_literal_type_node);
if (bits <= TYPE_PRECISION (intQI_type_node))
return unsignedp ? unsigned_intQI_type_node : intQI_type_node;
if (bits <= TYPE_PRECISION (intHI_type_node))
return unsignedp ? unsigned_intHI_type_node : intHI_type_node;
if (bits <= TYPE_PRECISION (intSI_type_node))
return unsignedp ? unsigned_intSI_type_node : intSI_type_node;
if (bits <= TYPE_PRECISION (intDI_type_node))
return unsignedp ? unsigned_intDI_type_node : intDI_type_node;
return 0;
}
static GTY(()) tree registered_builtin_types;
tree
c_common_type_for_mode (enum machine_mode mode, int unsignedp)
{
tree t;
if (mode == TYPE_MODE (integer_type_node))
return unsignedp ? unsigned_type_node : integer_type_node;
if (mode == TYPE_MODE (signed_char_type_node))
return unsignedp ? unsigned_char_type_node : signed_char_type_node;
if (mode == TYPE_MODE (short_integer_type_node))
return unsignedp ? short_unsigned_type_node : short_integer_type_node;
if (mode == TYPE_MODE (long_integer_type_node))
return unsignedp ? long_unsigned_type_node : long_integer_type_node;
if (mode == TYPE_MODE (long_long_integer_type_node))
return unsignedp ? long_long_unsigned_type_node : long_long_integer_type_node;
if (mode == TYPE_MODE (widest_integer_literal_type_node))
return unsignedp ? widest_unsigned_literal_type_node
: widest_integer_literal_type_node;
if (mode == QImode)
return unsignedp ? unsigned_intQI_type_node : intQI_type_node;
if (mode == HImode)
return unsignedp ? unsigned_intHI_type_node : intHI_type_node;
if (mode == SImode)
return unsignedp ? unsigned_intSI_type_node : intSI_type_node;
if (mode == DImode)
return unsignedp ? unsigned_intDI_type_node : intDI_type_node;
#if HOST_BITS_PER_WIDE_INT >= 64
if (mode == TYPE_MODE (intTI_type_node))
return unsignedp ? unsigned_intTI_type_node : intTI_type_node;
#endif
if (mode == TYPE_MODE (float_type_node))
return float_type_node;
if (mode == TYPE_MODE (double_type_node))
return double_type_node;
if (mode == TYPE_MODE (long_double_type_node))
return long_double_type_node;
if (mode == TYPE_MODE (void_type_node))
return void_type_node;
if (mode == TYPE_MODE (build_pointer_type (char_type_node)))
return unsignedp ? make_unsigned_type (mode) : make_signed_type (mode);
if (mode == TYPE_MODE (build_pointer_type (integer_type_node)))
return unsignedp ? make_unsigned_type (mode) : make_signed_type (mode);
if (VECTOR_MODE_P (mode))
{
enum machine_mode inner_mode = GET_MODE_INNER (mode);
tree inner_type = c_common_type_for_mode (inner_mode, unsignedp);
if (inner_type != NULL_TREE)
return build_vector_type_for_mode (inner_type, mode);
}
for (t = registered_builtin_types; t; t = TREE_CHAIN (t))
if (TYPE_MODE (TREE_VALUE (t)) == mode)
return TREE_VALUE (t);
return 0;
}
tree
c_common_unsigned_type (tree type)
{
tree type1 = TYPE_MAIN_VARIANT (type);
if (type1 == signed_char_type_node || type1 == char_type_node)
return unsigned_char_type_node;
if (type1 == integer_type_node)
return unsigned_type_node;
if (type1 == short_integer_type_node)
return short_unsigned_type_node;
if (type1 == long_integer_type_node)
return long_unsigned_type_node;
if (type1 == long_long_integer_type_node)
return long_long_unsigned_type_node;
if (type1 == widest_integer_literal_type_node)
return widest_unsigned_literal_type_node;
#if HOST_BITS_PER_WIDE_INT >= 64
if (type1 == intTI_type_node)
return unsigned_intTI_type_node;
#endif
if (type1 == intDI_type_node)
return unsigned_intDI_type_node;
if (type1 == intSI_type_node)
return unsigned_intSI_type_node;
if (type1 == intHI_type_node)
return unsigned_intHI_type_node;
if (type1 == intQI_type_node)
return unsigned_intQI_type_node;
return c_common_signed_or_unsigned_type (1, type);
}
tree
c_common_signed_type (tree type)
{
tree type1 = TYPE_MAIN_VARIANT (type);
if (type1 == unsigned_char_type_node || type1 == char_type_node)
return signed_char_type_node;
if (type1 == unsigned_type_node)
return integer_type_node;
if (type1 == short_unsigned_type_node)
return short_integer_type_node;
if (type1 == long_unsigned_type_node)
return long_integer_type_node;
if (type1 == long_long_unsigned_type_node)
return long_long_integer_type_node;
if (type1 == widest_unsigned_literal_type_node)
return widest_integer_literal_type_node;
#if HOST_BITS_PER_WIDE_INT >= 64
if (type1 == unsigned_intTI_type_node)
return intTI_type_node;
#endif
if (type1 == unsigned_intDI_type_node)
return intDI_type_node;
if (type1 == unsigned_intSI_type_node)
return intSI_type_node;
if (type1 == unsigned_intHI_type_node)
return intHI_type_node;
if (type1 == unsigned_intQI_type_node)
return intQI_type_node;
return c_common_signed_or_unsigned_type (0, type);
}
tree
c_common_signed_or_unsigned_type (int unsignedp, tree type)
{
if (! INTEGRAL_TYPE_P (type)
|| TYPE_UNSIGNED (type) == unsignedp)
return type;
#define TYPE_OK(node) \
(TYPE_MODE (type) == TYPE_MODE (node) \
&& (c_dialect_cxx () || TYPE_PRECISION (type) == TYPE_PRECISION (node)))
if (TYPE_OK (signed_char_type_node))
return unsignedp ? unsigned_char_type_node : signed_char_type_node;
if (TYPE_OK (integer_type_node))
return unsignedp ? unsigned_type_node : integer_type_node;
if (TYPE_OK (short_integer_type_node))
return unsignedp ? short_unsigned_type_node : short_integer_type_node;
if (TYPE_OK (long_integer_type_node))
return unsignedp ? long_unsigned_type_node : long_integer_type_node;
if (TYPE_OK (long_long_integer_type_node))
return (unsignedp ? long_long_unsigned_type_node
: long_long_integer_type_node);
if (TYPE_OK (widest_integer_literal_type_node))
return (unsignedp ? widest_unsigned_literal_type_node
: widest_integer_literal_type_node);
#if HOST_BITS_PER_WIDE_INT >= 64
if (TYPE_OK (intTI_type_node))
return unsignedp ? unsigned_intTI_type_node : intTI_type_node;
#endif
if (TYPE_OK (intDI_type_node))
return unsignedp ? unsigned_intDI_type_node : intDI_type_node;
if (TYPE_OK (intSI_type_node))
return unsignedp ? unsigned_intSI_type_node : intSI_type_node;
if (TYPE_OK (intHI_type_node))
return unsignedp ? unsigned_intHI_type_node : intHI_type_node;
if (TYPE_OK (intQI_type_node))
return unsignedp ? unsigned_intQI_type_node : intQI_type_node;
#undef TYPE_OK
if (c_dialect_cxx ())
return type;
else
return build_nonstandard_integer_type (TYPE_PRECISION (type), unsignedp);
}
void
c_register_builtin_type (tree type, const char* name)
{
tree decl;
decl = build_decl (TYPE_DECL, get_identifier (name), type);
DECL_ARTIFICIAL (decl) = 1;
if (!TYPE_NAME (type))
TYPE_NAME (type) = decl;
pushdecl (decl);
registered_builtin_types = tree_cons (0, type, registered_builtin_types);
}
unsigned int
min_precision (tree value, int unsignedp)
{
int log;
if (tree_int_cst_sgn (value) < 0)
value = fold (build1 (BIT_NOT_EXPR, TREE_TYPE (value), value));
if (integer_zerop (value))
log = 0;
else
log = tree_floor_log2 (value);
return log + 1 + ! unsignedp;
}
void
binary_op_error (enum tree_code code)
{
const char *opname;
switch (code)
{
case NOP_EXPR:
error ("invalid truth-value expression");
return;
case PLUS_EXPR:
opname = "+"; break;
case MINUS_EXPR:
opname = "-"; break;
case MULT_EXPR:
opname = "*"; break;
case MAX_EXPR:
opname = "max"; break;
case MIN_EXPR:
opname = "min"; break;
case EQ_EXPR:
opname = "=="; break;
case NE_EXPR:
opname = "!="; break;
case LE_EXPR:
opname = "<="; break;
case GE_EXPR:
opname = ">="; break;
case LT_EXPR:
opname = "<"; break;
case GT_EXPR:
opname = ">"; break;
case LSHIFT_EXPR:
opname = "<<"; break;
case RSHIFT_EXPR:
opname = ">>"; break;
case TRUNC_MOD_EXPR:
case FLOOR_MOD_EXPR:
opname = "%"; break;
case TRUNC_DIV_EXPR:
case FLOOR_DIV_EXPR:
opname = "/"; break;
case BIT_AND_EXPR:
opname = "&"; break;
case BIT_IOR_EXPR:
opname = "|"; break;
case TRUTH_ANDIF_EXPR:
opname = "&&"; break;
case TRUTH_ORIF_EXPR:
opname = "||"; break;
case BIT_XOR_EXPR:
opname = "^"; break;
case LROTATE_EXPR:
case RROTATE_EXPR:
opname = "rotate"; break;
default:
opname = "unknown"; break;
}
error ("invalid operands to binary %s", opname);
}
tree
shorten_compare (tree *op0_ptr, tree *op1_ptr, tree *restype_ptr,
enum tree_code *rescode_ptr)
{
tree type;
tree op0 = *op0_ptr;
tree op1 = *op1_ptr;
int unsignedp0, unsignedp1;
int real1, real2;
tree primop0, primop1;
enum tree_code code = *rescode_ptr;
primop0 = get_narrower (op0, &unsignedp0);
primop1 = get_narrower (op1, &unsignedp1);
if (op0 == primop0 && TREE_TYPE (op0) != *restype_ptr)
unsignedp0 = TYPE_UNSIGNED (TREE_TYPE (op0));
if (op1 == primop1 && TREE_TYPE (op1) != *restype_ptr)
unsignedp1 = TYPE_UNSIGNED (TREE_TYPE (op1));
real1 = TREE_CODE (TREE_TYPE (primop0)) == REAL_TYPE;
real2 = TREE_CODE (TREE_TYPE (primop1)) == REAL_TYPE;
if (TREE_CONSTANT (primop0)
&& ! integer_zerop (primop1) && ! real_zerop (primop1))
{
tree tem = primop0;
int temi = unsignedp0;
primop0 = primop1;
primop1 = tem;
tem = op0;
op0 = op1;
op1 = tem;
*op0_ptr = op0;
*op1_ptr = op1;
unsignedp0 = unsignedp1;
unsignedp1 = temi;
temi = real1;
real1 = real2;
real2 = temi;
switch (code)
{
case LT_EXPR:
code = GT_EXPR;
break;
case GT_EXPR:
code = LT_EXPR;
break;
case LE_EXPR:
code = GE_EXPR;
break;
case GE_EXPR:
code = LE_EXPR;
break;
default:
break;
}
*rescode_ptr = code;
}
if (!real1 && !real2
&& TREE_CODE (primop1) == INTEGER_CST
&& TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr))
{
int min_gt, max_gt, min_lt, max_lt;
tree maxval, minval;
int unsignedp = TYPE_UNSIGNED (*restype_ptr);
tree val;
type = c_common_signed_or_unsigned_type (unsignedp0,
TREE_TYPE (primop0));
if (!c_dialect_cxx() && TREE_CODE (type) == ENUMERAL_TYPE)
type = c_common_type_for_size (TYPE_PRECISION (type), unsignedp0);
maxval = TYPE_MAX_VALUE (type);
minval = TYPE_MIN_VALUE (type);
if (unsignedp && !unsignedp0)
*restype_ptr = c_common_signed_type (*restype_ptr);
if (TREE_TYPE (primop1) != *restype_ptr)
{
tree tmp = build_int_cst_wide (*restype_ptr,
TREE_INT_CST_LOW (primop1),
TREE_INT_CST_HIGH (primop1));
primop1 = force_fit_type (tmp, 0, TREE_OVERFLOW (primop1),
TREE_CONSTANT_OVERFLOW (primop1));
}
if (type != *restype_ptr)
{
minval = convert (*restype_ptr, minval);
maxval = convert (*restype_ptr, maxval);
}
if (unsignedp && unsignedp0)
{
min_gt = INT_CST_LT_UNSIGNED (primop1, minval);
max_gt = INT_CST_LT_UNSIGNED (primop1, maxval);
min_lt = INT_CST_LT_UNSIGNED (minval, primop1);
max_lt = INT_CST_LT_UNSIGNED (maxval, primop1);
}
else
{
min_gt = INT_CST_LT (primop1, minval);
max_gt = INT_CST_LT (primop1, maxval);
min_lt = INT_CST_LT (minval, primop1);
max_lt = INT_CST_LT (maxval, primop1);
}
val = 0;
if (code == NE_EXPR)
{
if (max_lt || min_gt)
val = truthvalue_true_node;
}
else if (code == EQ_EXPR)
{
if (max_lt || min_gt)
val = truthvalue_false_node;
}
else if (code == LT_EXPR)
{
if (max_lt)
val = truthvalue_true_node;
if (!min_lt)
val = truthvalue_false_node;
}
else if (code == GT_EXPR)
{
if (min_gt)
val = truthvalue_true_node;
if (!max_gt)
val = truthvalue_false_node;
}
else if (code == LE_EXPR)
{
if (!max_gt)
val = truthvalue_true_node;
if (min_gt)
val = truthvalue_false_node;
}
else if (code == GE_EXPR)
{
if (!min_lt)
val = truthvalue_true_node;
if (max_lt)
val = truthvalue_false_node;
}
if (unsignedp && !unsignedp0)
{
if (val != 0)
switch (code)
{
case LT_EXPR:
case GE_EXPR:
primop1 = TYPE_MIN_VALUE (type);
val = 0;
break;
case LE_EXPR:
case GT_EXPR:
primop1 = TYPE_MAX_VALUE (type);
val = 0;
break;
default:
break;
}
type = c_common_unsigned_type (type);
}
if (TREE_CODE (primop0) != INTEGER_CST)
{
if (val == truthvalue_false_node)
warning ("comparison is always false due to limited range of data type");
if (val == truthvalue_true_node)
warning ("comparison is always true due to limited range of data type");
}
if (val != 0)
{
if (TREE_SIDE_EFFECTS (primop0))
return build2 (COMPOUND_EXPR, TREE_TYPE (val), primop0, val);
return val;
}
}
else if (real1 && real2
&& (TYPE_PRECISION (TREE_TYPE (primop0))
== TYPE_PRECISION (TREE_TYPE (primop1))))
type = TREE_TYPE (primop0);
else if (unsignedp0 == unsignedp1 && real1 == real2
&& TYPE_PRECISION (TREE_TYPE (primop0)) < TYPE_PRECISION (*restype_ptr)
&& TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr))
{
type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1));
type = c_common_signed_or_unsigned_type (unsignedp0
|| TYPE_UNSIGNED (*restype_ptr),
type);
primop0
= convert (c_common_signed_or_unsigned_type (unsignedp0,
TREE_TYPE (primop0)),
primop0);
primop1
= convert (c_common_signed_or_unsigned_type (unsignedp1,
TREE_TYPE (primop1)),
primop1);
}
else
{
type = *restype_ptr;
primop0 = op0;
primop1 = op1;
if (!real1 && !real2 && integer_zerop (primop1)
&& TYPE_UNSIGNED (*restype_ptr))
{
tree value = 0;
switch (code)
{
case GE_EXPR:
if (extra_warnings && !in_system_header
&& ! (TREE_CODE (primop0) == INTEGER_CST
&& ! TREE_OVERFLOW (convert (c_common_signed_type (type),
primop0))))
warning ("comparison of unsigned expression >= 0 is always true");
value = truthvalue_true_node;
break;
case LT_EXPR:
if (extra_warnings && !in_system_header
&& ! (TREE_CODE (primop0) == INTEGER_CST
&& ! TREE_OVERFLOW (convert (c_common_signed_type (type),
primop0))))
warning ("comparison of unsigned expression < 0 is always false");
value = truthvalue_false_node;
break;
default:
break;
}
if (value != 0)
{
if (TREE_SIDE_EFFECTS (primop0))
return build2 (COMPOUND_EXPR, TREE_TYPE (value),
primop0, value);
return value;
}
}
}
*op0_ptr = convert (type, primop0);
*op1_ptr = convert (type, primop1);
*restype_ptr = truthvalue_type_node;
return 0;
}
tree
pointer_int_sum (enum tree_code resultcode, tree ptrop, tree intop)
{
tree size_exp;
tree result_type = TREE_TYPE (ptrop);
if (TREE_CODE (TREE_TYPE (result_type)) == VOID_TYPE)
{
if (pedantic || warn_pointer_arith)
pedwarn ("pointer of type %<void *%> used in arithmetic");
size_exp = integer_one_node;
}
else if (TREE_CODE (TREE_TYPE (result_type)) == FUNCTION_TYPE)
{
if (pedantic || warn_pointer_arith)
pedwarn ("pointer to a function used in arithmetic");
size_exp = integer_one_node;
}
else if (TREE_CODE (TREE_TYPE (result_type)) == METHOD_TYPE)
{
if (pedantic || warn_pointer_arith)
pedwarn ("pointer to member function used in arithmetic");
size_exp = integer_one_node;
}
else
size_exp = size_in_bytes (TREE_TYPE (result_type));
if ((TREE_CODE (intop) == PLUS_EXPR || TREE_CODE (intop) == MINUS_EXPR)
&& ! TREE_CONSTANT (intop)
&& TREE_CONSTANT (TREE_OPERAND (intop, 1))
&& TREE_CONSTANT (size_exp)
&& TREE_CODE (TREE_TYPE (TREE_OPERAND (intop, 0))) == INTEGER_TYPE
&& (! TYPE_UNSIGNED (TREE_TYPE (intop))
|| (TYPE_PRECISION (TREE_TYPE (intop))
== TYPE_PRECISION (TREE_TYPE (ptrop)))))
{
enum tree_code subcode = resultcode;
tree int_type = TREE_TYPE (intop);
if (TREE_CODE (intop) == MINUS_EXPR)
subcode = (subcode == PLUS_EXPR ? MINUS_EXPR : PLUS_EXPR);
ptrop = build_binary_op (subcode, ptrop,
convert (int_type, TREE_OPERAND (intop, 1)), 1);
intop = convert (int_type, TREE_OPERAND (intop, 0));
}
if (TYPE_PRECISION (TREE_TYPE (intop)) != TYPE_PRECISION (sizetype)
|| TYPE_UNSIGNED (TREE_TYPE (intop)) != TYPE_UNSIGNED (sizetype))
intop = convert (c_common_type_for_size (TYPE_PRECISION (sizetype),
TYPE_UNSIGNED (sizetype)), intop);
intop = convert (result_type,
build_binary_op (MULT_EXPR, intop,
convert (TREE_TYPE (intop), size_exp), 1));
return fold (build2 (resultcode, result_type, ptrop, intop));
}
tree
c_common_truthvalue_conversion (tree expr)
{
if (TREE_CODE (expr) == ERROR_MARK)
return expr;
if (TREE_CODE (expr) == FUNCTION_DECL)
expr = build_unary_op (ADDR_EXPR, expr, 0);
switch (TREE_CODE (expr))
{
case EQ_EXPR: case NE_EXPR: case UNEQ_EXPR: case LTGT_EXPR:
case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
case UNLE_EXPR: case UNGE_EXPR: case UNLT_EXPR: case UNGT_EXPR:
case ORDERED_EXPR: case UNORDERED_EXPR:
case TRUTH_ANDIF_EXPR:
case TRUTH_ORIF_EXPR:
case TRUTH_AND_EXPR:
case TRUTH_OR_EXPR:
case TRUTH_XOR_EXPR:
case TRUTH_NOT_EXPR:
TREE_TYPE (expr) = truthvalue_type_node;
return expr;
case ERROR_MARK:
return expr;
case INTEGER_CST:
return integer_zerop (expr) ? truthvalue_false_node : truthvalue_true_node;
case REAL_CST:
return real_zerop (expr) ? truthvalue_false_node : truthvalue_true_node;
case ADDR_EXPR:
{
if (TREE_CODE (TREE_OPERAND (expr, 0)) == FUNCTION_DECL
&& ! DECL_WEAK (TREE_OPERAND (expr, 0)))
{
warning ("the address of %qD, will always evaluate as %<true%>",
TREE_OPERAND (expr, 0));
return truthvalue_true_node;
}
if (DECL_P (TREE_OPERAND (expr, 0))
&& DECL_EXTERNAL (TREE_OPERAND (expr, 0)))
break;
if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 0)))
return build2 (COMPOUND_EXPR, truthvalue_type_node,
TREE_OPERAND (expr, 0), truthvalue_true_node);
else
return truthvalue_true_node;
}
case COMPLEX_EXPR:
return build_binary_op ((TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))
? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR),
lang_hooks.truthvalue_conversion (TREE_OPERAND (expr, 0)),
lang_hooks.truthvalue_conversion (TREE_OPERAND (expr, 1)),
0);
case NEGATE_EXPR:
case ABS_EXPR:
case FLOAT_EXPR:
return lang_hooks.truthvalue_conversion (TREE_OPERAND (expr, 0));
case LROTATE_EXPR:
case RROTATE_EXPR:
if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)))
return build2 (COMPOUND_EXPR, truthvalue_type_node,
TREE_OPERAND (expr, 1),
lang_hooks.truthvalue_conversion (TREE_OPERAND (expr, 0)));
else
return lang_hooks.truthvalue_conversion (TREE_OPERAND (expr, 0));
case COND_EXPR:
return fold (build3 (COND_EXPR, truthvalue_type_node,
TREE_OPERAND (expr, 0),
lang_hooks.truthvalue_conversion (TREE_OPERAND (expr, 1)),
lang_hooks.truthvalue_conversion (TREE_OPERAND (expr, 2))));
case CONVERT_EXPR:
if (TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE
|| TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == REFERENCE_TYPE)
break;
case NOP_EXPR:
if (TYPE_PRECISION (TREE_TYPE (expr))
>= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr, 0))))
return lang_hooks.truthvalue_conversion (TREE_OPERAND (expr, 0));
break;
case MINUS_EXPR:
if (HONOR_INFINITIES (TYPE_MODE (TREE_TYPE (TREE_OPERAND (expr, 0)))))
break;
case BIT_XOR_EXPR:
if (TREE_TYPE (TREE_OPERAND (expr, 0))
== TREE_TYPE (TREE_OPERAND (expr, 1)))
return build_binary_op (NE_EXPR, TREE_OPERAND (expr, 0),
TREE_OPERAND (expr, 1), 1);
return build_binary_op (NE_EXPR, TREE_OPERAND (expr, 0),
fold (build1 (NOP_EXPR,
TREE_TYPE (TREE_OPERAND (expr, 0)),
TREE_OPERAND (expr, 1))), 1);
case BIT_AND_EXPR:
if (integer_onep (TREE_OPERAND (expr, 1))
&& TREE_TYPE (expr) != truthvalue_type_node)
return build1 (NOP_EXPR, truthvalue_type_node, expr);
break;
case MODIFY_EXPR:
if (warn_parentheses && !TREE_NO_WARNING (expr))
warning ("suggest parentheses around assignment used as truth value");
break;
default:
break;
}
if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE)
{
tree t = save_expr (expr);
return (build_binary_op
((TREE_SIDE_EFFECTS (expr)
? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR),
lang_hooks.truthvalue_conversion (build_unary_op (REALPART_EXPR, t, 0)),
lang_hooks.truthvalue_conversion (build_unary_op (IMAGPART_EXPR, t, 0)),
0));
}
return build_binary_op (NE_EXPR, expr, integer_zero_node, 1);
}
static tree builtin_function_2 (const char *builtin_name, const char *name,
tree builtin_type, tree type,
enum built_in_function function_code,
enum built_in_class cl, int library_name_p,
bool nonansi_p,
tree attrs);
tree
c_build_qualified_type (tree type, int type_quals)
{
if (type == error_mark_node)
return type;
if (TREE_CODE (type) == ARRAY_TYPE)
return build_array_type (c_build_qualified_type (TREE_TYPE (type),
type_quals),
TYPE_DOMAIN (type));
if ((type_quals & TYPE_QUAL_RESTRICT)
&& (!POINTER_TYPE_P (type)
|| !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type))))
{
error ("invalid use of %<restrict%>");
type_quals &= ~TYPE_QUAL_RESTRICT;
}
return build_qualified_type (type, type_quals);
}
void
c_apply_type_quals_to_decl (int type_quals, tree decl)
{
tree type = TREE_TYPE (decl);
if (type == error_mark_node)
return;
if (((type_quals & TYPE_QUAL_CONST)
|| (type && TREE_CODE (type) == REFERENCE_TYPE))
&& !(type && TYPE_NEEDS_CONSTRUCTING (type)))
TREE_READONLY (decl) = 1;
if (type_quals & TYPE_QUAL_VOLATILE)
{
TREE_SIDE_EFFECTS (decl) = 1;
TREE_THIS_VOLATILE (decl) = 1;
}
if (type_quals & TYPE_QUAL_RESTRICT)
{
while (type && TREE_CODE (type) == ARRAY_TYPE)
type = TREE_TYPE (type);
if (!type
|| !POINTER_TYPE_P (type)
|| !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (type)))
error ("invalid use of %<restrict%>");
else if (flag_strict_aliasing && type == TREE_TYPE (decl))
DECL_POINTER_ALIAS_SET (decl) = -2;
}
}
static hashval_t
c_type_hash (const void *p)
{
int i = 0;
int shift, size;
tree t = (tree)p;
tree t2;
switch (TREE_CODE (t))
{
case POINTER_TYPE:
return c_type_hash (TREE_TYPE (t)) ^ 0x3003003;
case ENUMERAL_TYPE:
shift = 3;
t2 = TYPE_VALUES (t);
break;
case RECORD_TYPE:
shift = 0;
t2 = TYPE_FIELDS (t);
break;
case QUAL_UNION_TYPE:
shift = 1;
t2 = TYPE_FIELDS (t);
break;
case UNION_TYPE:
shift = 2;
t2 = TYPE_FIELDS (t);
break;
default:
gcc_unreachable ();
}
for (; t2; t2 = TREE_CHAIN (t2))
i++;
size = TREE_INT_CST_LOW (TYPE_SIZE (t));
return ((size << 24) | (i << shift));
}
static GTY((param_is (union tree_node))) htab_t type_hash_table;
HOST_WIDE_INT
c_common_get_alias_set (tree t)
{
tree u;
PTR *slot;
for (u = t;
TREE_CODE (u) == COMPONENT_REF || TREE_CODE (u) == ARRAY_REF;
u = TREE_OPERAND (u, 0))
if (TREE_CODE (u) == COMPONENT_REF
&& TREE_CODE (TREE_TYPE (TREE_OPERAND (u, 0))) == UNION_TYPE)
return 0;
if (! TYPE_P (t))
return -1;
if (t == char_type_node
|| t == signed_char_type_node
|| t == unsigned_char_type_node)
return 0;
if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (t)))
return 0;
if (TREE_CODE (t) == INTEGER_TYPE && TYPE_UNSIGNED (t))
{
tree t1 = c_common_signed_type (t);
if (t1 != t)
return get_alias_set (t1);
}
else if (POINTER_TYPE_P (t))
{
tree t1;
t1 = build_type_no_quals (t);
if (t1 != t)
return get_alias_set (t1);
}
if (c_language != clk_c || flag_isoc99)
return -1;
if (num_in_fnames == 1)
return -1;
if (TREE_CODE (t) == POINTER_TYPE)
{
tree t2;
for (t2 = TREE_TYPE (t);
TREE_CODE (t2) == POINTER_TYPE;
t2 = TREE_TYPE (t2))
;
if (TREE_CODE (t2) != RECORD_TYPE
&& TREE_CODE (t2) != ENUMERAL_TYPE
&& TREE_CODE (t2) != QUAL_UNION_TYPE
&& TREE_CODE (t2) != UNION_TYPE)
return -1;
if (TYPE_SIZE (t2) == 0)
return -1;
}
if (TREE_CODE (t) != RECORD_TYPE
&& TREE_CODE (t) != ENUMERAL_TYPE
&& TREE_CODE (t) != QUAL_UNION_TYPE
&& TREE_CODE (t) != UNION_TYPE
&& TREE_CODE (t) != POINTER_TYPE)
return -1;
if (TYPE_SIZE (t) == 0)
return -1;
if (!type_hash_table)
type_hash_table = htab_create_ggc (1021, c_type_hash,
(htab_eq) lang_hooks.types_compatible_p,
NULL);
slot = htab_find_slot (type_hash_table, t, INSERT);
if (*slot != NULL)
{
TYPE_ALIAS_SET (t) = TYPE_ALIAS_SET ((tree)*slot);
return TYPE_ALIAS_SET ((tree)*slot);
}
else
*slot = t;
return -1;
}
tree
c_sizeof_or_alignof_type (tree type, enum tree_code op, int complain)
{
const char *op_name;
tree value = NULL;
enum tree_code type_code = TREE_CODE (type);
gcc_assert (op == SIZEOF_EXPR || op == ALIGNOF_EXPR);
op_name = op == SIZEOF_EXPR ? "sizeof" : "__alignof__";
if (type_code == FUNCTION_TYPE)
{
if (op == SIZEOF_EXPR)
{
if (complain && (pedantic || warn_pointer_arith))
pedwarn ("invalid application of %<sizeof%> to a function type");
value = size_one_node;
}
else
value = size_int (FUNCTION_BOUNDARY / BITS_PER_UNIT);
}
else if (type_code == VOID_TYPE || type_code == ERROR_MARK)
{
if (type_code == VOID_TYPE
&& complain && (pedantic || warn_pointer_arith))
pedwarn ("invalid application of %qs to a void type", op_name);
value = size_one_node;
}
else if (!COMPLETE_TYPE_P (type))
{
if (complain)
error ("invalid application of %qs to incomplete type %qT ",
op_name, type);
value = size_zero_node;
}
else
{
if (op == (enum tree_code) SIZEOF_EXPR)
value = size_binop (CEIL_DIV_EXPR, TYPE_SIZE_UNIT (type),
size_int (TYPE_PRECISION (char_type_node)
/ BITS_PER_UNIT));
else
value = size_int (TYPE_ALIGN_UNIT (type));
}
value = fold (build1 (NOP_EXPR, size_type_node, value));
gcc_assert (!TYPE_IS_SIZETYPE (TREE_TYPE (value)));
return value;
}
tree
c_alignof_expr (tree expr)
{
tree t;
if (TREE_CODE (expr) == VAR_DECL)
t = size_int (DECL_ALIGN_UNIT (expr));
else if (TREE_CODE (expr) == COMPONENT_REF
&& DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1)))
{
error ("%<__alignof%> applied to a bit-field");
t = size_one_node;
}
else if (TREE_CODE (expr) == COMPONENT_REF
&& TREE_CODE (TREE_OPERAND (expr, 1)) == FIELD_DECL)
t = size_int (DECL_ALIGN_UNIT (TREE_OPERAND (expr, 1)));
else if (TREE_CODE (expr) == INDIRECT_REF)
{
tree t = TREE_OPERAND (expr, 0);
tree best = t;
int bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t)));
while (TREE_CODE (t) == NOP_EXPR
&& TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE)
{
int thisalign;
t = TREE_OPERAND (t, 0);
thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t)));
if (thisalign > bestalign)
best = t, bestalign = thisalign;
}
return c_alignof (TREE_TYPE (TREE_TYPE (best)));
}
else
return c_alignof (TREE_TYPE (expr));
return fold (build1 (NOP_EXPR, size_type_node, t));
}
enum built_in_attribute
{
#define DEF_ATTR_NULL_TREE(ENUM) ENUM,
#define DEF_ATTR_INT(ENUM, VALUE) ENUM,
#define DEF_ATTR_IDENT(ENUM, STRING) ENUM,
#define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) ENUM,
#include "builtin-attrs.def"
#undef DEF_ATTR_NULL_TREE
#undef DEF_ATTR_INT
#undef DEF_ATTR_IDENT
#undef DEF_ATTR_TREE_LIST
ATTR_LAST
};
static GTY(()) tree built_in_attributes[(int) ATTR_LAST];
static void c_init_attributes (void);
void
c_common_nodes_and_builtins (void)
{
enum builtin_type
{
#define DEF_PRIMITIVE_TYPE(NAME, VALUE) NAME,
#define DEF_FUNCTION_TYPE_0(NAME, RETURN) NAME,
#define DEF_FUNCTION_TYPE_1(NAME, RETURN, ARG1) NAME,
#define DEF_FUNCTION_TYPE_2(NAME, RETURN, ARG1, ARG2) NAME,
#define DEF_FUNCTION_TYPE_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME,
#define DEF_FUNCTION_TYPE_4(NAME, RETURN, ARG1, ARG2, ARG3, ARG4) NAME,
#define DEF_FUNCTION_TYPE_VAR_0(NAME, RETURN) NAME,
#define DEF_FUNCTION_TYPE_VAR_1(NAME, RETURN, ARG1) NAME,
#define DEF_FUNCTION_TYPE_VAR_2(NAME, RETURN, ARG1, ARG2) NAME,
#define DEF_FUNCTION_TYPE_VAR_3(NAME, RETURN, ARG1, ARG2, ARG3) NAME,
#define DEF_POINTER_TYPE(NAME, TYPE) NAME,
#include "builtin-types.def"
#undef DEF_PRIMITIVE_TYPE
#undef DEF_FUNCTION_TYPE_0
#undef DEF_FUNCTION_TYPE_1
#undef DEF_FUNCTION_TYPE_2
#undef DEF_FUNCTION_TYPE_3
#undef DEF_FUNCTION_TYPE_4
#undef DEF_FUNCTION_TYPE_VAR_0
#undef DEF_FUNCTION_TYPE_VAR_1
#undef DEF_FUNCTION_TYPE_VAR_2
#undef DEF_FUNCTION_TYPE_VAR_3
#undef DEF_POINTER_TYPE
BT_LAST
};
typedef enum builtin_type builtin_type;
tree builtin_types[(int) BT_LAST];
int wchar_type_size;
tree array_domain_type;
tree va_list_ref_type_node;
tree va_list_arg_type_node;
record_builtin_type (RID_INT, NULL, integer_type_node);
record_builtin_type (RID_CHAR, "char", char_type_node);
if (c_dialect_cxx ())
record_builtin_type (RID_SIGNED, NULL, integer_type_node);
record_builtin_type (RID_LONG, "long int", long_integer_type_node);
record_builtin_type (RID_UNSIGNED, "unsigned int", unsigned_type_node);
record_builtin_type (RID_MAX, "long unsigned int",
long_unsigned_type_node);
if (c_dialect_cxx ())
record_builtin_type (RID_MAX, "unsigned long", long_unsigned_type_node);
record_builtin_type (RID_MAX, "long long int",
long_long_integer_type_node);
record_builtin_type (RID_MAX, "long long unsigned int",
long_long_unsigned_type_node);
if (c_dialect_cxx ())
record_builtin_type (RID_MAX, "long long unsigned",
long_long_unsigned_type_node);
record_builtin_type (RID_SHORT, "short int", short_integer_type_node);
record_builtin_type (RID_MAX, "short unsigned int",
short_unsigned_type_node);
if (c_dialect_cxx ())
record_builtin_type (RID_MAX, "unsigned short",
short_unsigned_type_node);
record_builtin_type (RID_MAX, "signed char", signed_char_type_node);
record_builtin_type (RID_MAX, "unsigned char", unsigned_char_type_node);
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
intQI_type_node));
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
intHI_type_node));
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
intSI_type_node));
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
intDI_type_node));
#if HOST_BITS_PER_WIDE_INT >= 64
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL,
get_identifier ("__int128_t"),
intTI_type_node));
#endif
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
unsigned_intQI_type_node));
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
unsigned_intHI_type_node));
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
unsigned_intSI_type_node));
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
unsigned_intDI_type_node));
#if HOST_BITS_PER_WIDE_INT >= 64
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL,
get_identifier ("__uint128_t"),
unsigned_intTI_type_node));
#endif
widest_integer_literal_type_node
= make_signed_type (HOST_BITS_PER_WIDE_INT * 2);
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
widest_integer_literal_type_node));
widest_unsigned_literal_type_node
= make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2);
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL, NULL_TREE,
widest_unsigned_literal_type_node));
size_type_node =
TREE_TYPE (identifier_global_value (get_identifier (SIZE_TYPE)));
signed_size_type_node = c_common_signed_type (size_type_node);
set_sizetype (size_type_node);
pid_type_node =
TREE_TYPE (identifier_global_value (get_identifier (PID_TYPE)));
build_common_tree_nodes_2 (flag_short_double);
record_builtin_type (RID_FLOAT, NULL, float_type_node);
record_builtin_type (RID_DOUBLE, NULL, double_type_node);
record_builtin_type (RID_MAX, "long double", long_double_type_node);
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL,
get_identifier ("complex int"),
complex_integer_type_node));
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL,
get_identifier ("complex float"),
complex_float_type_node));
lang_hooks.decls.pushdecl (build_decl (TYPE_DECL,
get_identifier ("complex double"),
complex_double_type_node));
lang_hooks.decls.pushdecl
(build_decl (TYPE_DECL, get_identifier ("complex long double"),
complex_long_double_type_node));
if (c_dialect_cxx ())
fileptr_type_node = build_variant_type_copy (ptr_type_node);
record_builtin_type (RID_VOID, NULL, void_type_node);
void_zero_node = make_node (INTEGER_CST);
TREE_TYPE (void_zero_node) = void_type_node;
void_list_node = build_void_list_node ();
array_domain_type = build_index_type (size_int (200));
char_array_type_node
= build_array_type (char_type_node, array_domain_type);
pascal_string_type_node
= build_array_type (unsigned_char_type_node, array_domain_type);
int_array_type_node
= build_array_type (integer_type_node, array_domain_type);
string_type_node = build_pointer_type (char_type_node);
const_string_type_node
= build_pointer_type (build_qualified_type
(char_type_node, TYPE_QUAL_CONST));
wchar_type_node = get_identifier (MODIFIED_WCHAR_TYPE);
wchar_type_node = TREE_TYPE (identifier_global_value (wchar_type_node));
wchar_type_size = TYPE_PRECISION (wchar_type_node);
if (c_dialect_cxx ())
{
if (TYPE_UNSIGNED (wchar_type_node))
wchar_type_node = make_unsigned_type (wchar_type_size);
else
wchar_type_node = make_signed_type (wchar_type_size);
record_builtin_type (RID_WCHAR, "wchar_t", wchar_type_node);
}
else
{
signed_wchar_type_node = c_common_signed_type (wchar_type_node);
unsigned_wchar_type_node = c_common_unsigned_type (wchar_type_node);
}
wchar_array_type_node
= build_array_type (wchar_type_node, array_domain_type);
wint_type_node =
TREE_TYPE (identifier_global_value (get_identifier (WINT_TYPE)));
intmax_type_node =
TREE_TYPE (identifier_global_value (get_identifier (INTMAX_TYPE)));
uintmax_type_node =
TREE_TYPE (identifier_global_value (get_identifier (UINTMAX_TYPE)));
default_function_type = build_function_type (integer_type_node, NULL_TREE);
ptrdiff_type_node
= TREE_TYPE (identifier_global_value (get_identifier (PTRDIFF_TYPE)));
unsigned_ptrdiff_type_node = c_common_unsigned_type (ptrdiff_type_node);
lang_hooks.decls.pushdecl
(build_decl (TYPE_DECL, get_identifier ("__builtin_va_list"),
va_list_type_node));
if (TREE_CODE (va_list_type_node) == ARRAY_TYPE)
{
va_list_arg_type_node = va_list_ref_type_node =
build_pointer_type (TREE_TYPE (va_list_type_node));
}
else
{
va_list_arg_type_node = va_list_type_node;
va_list_ref_type_node = build_reference_type (va_list_type_node);
}
#define DEF_PRIMITIVE_TYPE(ENUM, VALUE) \
builtin_types[(int) ENUM] = VALUE;
#define DEF_FUNCTION_TYPE_0(ENUM, RETURN) \
builtin_types[(int) ENUM] \
= build_function_type (builtin_types[(int) RETURN], \
void_list_node);
#define DEF_FUNCTION_TYPE_1(ENUM, RETURN, ARG1) \
builtin_types[(int) ENUM] \
= build_function_type (builtin_types[(int) RETURN], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG1], \
void_list_node));
#define DEF_FUNCTION_TYPE_2(ENUM, RETURN, ARG1, ARG2) \
builtin_types[(int) ENUM] \
= build_function_type \
(builtin_types[(int) RETURN], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG1], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG2], \
void_list_node)));
#define DEF_FUNCTION_TYPE_3(ENUM, RETURN, ARG1, ARG2, ARG3) \
builtin_types[(int) ENUM] \
= build_function_type \
(builtin_types[(int) RETURN], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG1], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG2], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG3], \
void_list_node))));
#define DEF_FUNCTION_TYPE_4(ENUM, RETURN, ARG1, ARG2, ARG3, ARG4) \
builtin_types[(int) ENUM] \
= build_function_type \
(builtin_types[(int) RETURN], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG1], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG2], \
tree_cons \
(NULL_TREE, \
builtin_types[(int) ARG3], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG4], \
void_list_node)))));
#define DEF_FUNCTION_TYPE_VAR_0(ENUM, RETURN) \
builtin_types[(int) ENUM] \
= build_function_type (builtin_types[(int) RETURN], NULL_TREE);
#define DEF_FUNCTION_TYPE_VAR_1(ENUM, RETURN, ARG1) \
builtin_types[(int) ENUM] \
= build_function_type (builtin_types[(int) RETURN], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG1], \
NULL_TREE));
#define DEF_FUNCTION_TYPE_VAR_2(ENUM, RETURN, ARG1, ARG2) \
builtin_types[(int) ENUM] \
= build_function_type \
(builtin_types[(int) RETURN], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG1], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG2], \
NULL_TREE)));
#define DEF_FUNCTION_TYPE_VAR_3(ENUM, RETURN, ARG1, ARG2, ARG3) \
builtin_types[(int) ENUM] \
= build_function_type \
(builtin_types[(int) RETURN], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG1], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG2], \
tree_cons (NULL_TREE, \
builtin_types[(int) ARG3], \
NULL_TREE))));
#define DEF_POINTER_TYPE(ENUM, TYPE) \
builtin_types[(int) ENUM] \
= build_pointer_type (builtin_types[(int) TYPE]);
#include "builtin-types.def"
#undef DEF_PRIMITIVE_TYPE
#undef DEF_FUNCTION_TYPE_1
#undef DEF_FUNCTION_TYPE_2
#undef DEF_FUNCTION_TYPE_3
#undef DEF_FUNCTION_TYPE_4
#undef DEF_FUNCTION_TYPE_VAR_0
#undef DEF_FUNCTION_TYPE_VAR_1
#undef DEF_FUNCTION_TYPE_VAR_2
#undef DEF_FUNCTION_TYPE_VAR_3
#undef DEF_POINTER_TYPE
c_init_attributes ();
#define DEF_BUILTIN(ENUM, NAME, CLASS, TYPE, LIBTYPE, \
BOTH_P, FALLBACK_P, NONANSI_P, ATTRS, IMPLICIT) \
if (NAME) \
{ \
tree decl; \
\
gcc_assert (!strncmp (NAME, "__builtin_", \
strlen ("__builtin_"))); \
\
if (!BOTH_P) \
decl = lang_hooks.builtin_function (NAME, builtin_types[TYPE], \
ENUM, \
CLASS, \
(FALLBACK_P \
? (NAME + strlen ("__builtin_")) \
: NULL), \
built_in_attributes[(int) ATTRS]); \
else \
decl = builtin_function_2 (NAME, \
NAME + strlen ("__builtin_"), \
builtin_types[TYPE], \
builtin_types[LIBTYPE], \
ENUM, \
CLASS, \
FALLBACK_P, \
NONANSI_P, \
built_in_attributes[(int) ATTRS]); \
\
built_in_decls[(int) ENUM] = decl; \
if (IMPLICIT) \
implicit_built_in_decls[(int) ENUM] = decl; \
}
#include "builtins.def"
#undef DEF_BUILTIN
targetm.init_builtins ();
if (flag_mudflap)
mudflap_init ();
main_identifier_node = get_identifier ("main");
}
tree
build_va_arg (tree expr, tree type)
{
return build1 (VA_ARG_EXPR, type, expr);
}
typedef struct disabled_builtin
{
const char *name;
struct disabled_builtin *next;
} disabled_builtin;
static disabled_builtin *disabled_builtins = NULL;
bool builtin_function_disabled_p (const char *);
void
disable_builtin_function (const char *name)
{
if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0)
error ("cannot disable built-in function %qs", name);
else
{
disabled_builtin *new_disabled_builtin = XNEW (disabled_builtin);
new_disabled_builtin->name = name;
new_disabled_builtin->next = disabled_builtins;
disabled_builtins = new_disabled_builtin;
}
}
bool
builtin_function_disabled_p (const char *name)
{
disabled_builtin *p;
for (p = disabled_builtins; p != NULL; p = p->next)
{
if (strcmp (name, p->name) == 0)
return true;
}
return false;
}
static tree
builtin_function_2 (const char *builtin_name, const char *name,
tree builtin_type, tree type,
enum built_in_function function_code,
enum built_in_class cl, int library_name_p,
bool nonansi_p, tree attrs)
{
tree bdecl = NULL_TREE;
tree decl = NULL_TREE;
if (builtin_name != 0)
bdecl = lang_hooks.builtin_function (builtin_name, builtin_type,
function_code, cl,
library_name_p ? name : NULL, attrs);
if (name != 0 && !flag_no_builtin && !builtin_function_disabled_p (name)
&& !(nonansi_p && flag_no_nonansi_builtin))
decl = lang_hooks.builtin_function (name, type, function_code, cl,
NULL, attrs);
return (bdecl != 0 ? bdecl : decl);
}
bool
c_promoting_integer_type_p (tree t)
{
switch (TREE_CODE (t))
{
case INTEGER_TYPE:
return (TYPE_MAIN_VARIANT (t) == char_type_node
|| TYPE_MAIN_VARIANT (t) == signed_char_type_node
|| TYPE_MAIN_VARIANT (t) == unsigned_char_type_node
|| TYPE_MAIN_VARIANT (t) == short_integer_type_node
|| TYPE_MAIN_VARIANT (t) == short_unsigned_type_node
|| TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node));
case ENUMERAL_TYPE:
return TYPE_PRECISION (t) < TYPE_PRECISION (integer_type_node);
case BOOLEAN_TYPE:
return 1;
default:
return 0;
}
}
int
self_promoting_args_p (tree parms)
{
tree t;
for (t = parms; t; t = TREE_CHAIN (t))
{
tree type = TREE_VALUE (t);
if (TREE_CHAIN (t) == 0 && type != void_type_node)
return 0;
if (type == 0)
return 0;
if (TYPE_MAIN_VARIANT (type) == float_type_node)
return 0;
if (c_promoting_integer_type_p (type))
return 0;
}
return 1;
}
tree
strip_array_types (tree type)
{
while (TREE_CODE (type) == ARRAY_TYPE)
type = TREE_TYPE (type);
return type;
}
tree
strip_pointer_operator (tree t)
{
while (POINTER_TYPE_P (t))
t = TREE_TYPE (t);
return t;
}
tree
walk_stmt_tree (tree *tp, walk_tree_fn func, void *data)
{
enum tree_code code;
int walk_subtrees;
tree result;
int i, len;
#define WALK_SUBTREE(NODE) \
do \
{ \
result = walk_stmt_tree (&(NODE), func, data); \
if (result) \
return result; \
} \
while (0)
if (!*tp)
return NULL_TREE;
if (!STATEMENT_CODE_P (TREE_CODE (*tp)))
return NULL_TREE;
walk_subtrees = 1;
result = (*func) (tp, &walk_subtrees, data);
if (result)
return result;
code = TREE_CODE (*tp);
if (!STATEMENT_CODE_P (code))
return NULL_TREE;
if (walk_subtrees)
{
len = TREE_CODE_LENGTH (code);
for (i = 0; i < len; ++i)
WALK_SUBTREE (TREE_OPERAND (*tp, i));
}
return walk_stmt_tree (&TREE_CHAIN (*tp), func, data);
#undef WALK_SUBTREE
}
int
case_compare (splay_tree_key k1, splay_tree_key k2)
{
if (!k1)
return k2 ? -1 : 0;
else if (!k2)
return k1 ? 1 : 0;
return tree_int_cst_compare ((tree) k1, (tree) k2);
}
tree
c_add_case_label (splay_tree cases, tree cond, tree orig_type,
tree low_value, tree high_value)
{
tree type;
tree label;
tree case_label;
splay_tree_node node;
label = create_artificial_label ();
if (!cond || cond == error_mark_node)
goto error_out;
if ((low_value && TREE_TYPE (low_value)
&& POINTER_TYPE_P (TREE_TYPE (low_value)))
|| (high_value && TREE_TYPE (high_value)
&& POINTER_TYPE_P (TREE_TYPE (high_value))))
error ("pointers are not permitted as case values");
if (high_value && pedantic)
pedwarn ("range expressions in switch statements are non-standard");
type = TREE_TYPE (cond);
if (low_value)
{
low_value = check_case_value (low_value);
low_value = convert_and_check (type, low_value);
}
if (high_value)
{
high_value = check_case_value (high_value);
high_value = convert_and_check (type, high_value);
}
if (low_value == error_mark_node || high_value == error_mark_node)
goto error_out;
if (tree_int_cst_equal (low_value, high_value))
high_value = NULL_TREE;
if (low_value && high_value
&& !tree_int_cst_lt (low_value, high_value))
warning ("empty range specified");
if (low_value
&& ! check_case_bounds (type, orig_type,
&low_value, high_value ? &high_value : NULL))
return NULL_TREE;
node = splay_tree_lookup (cases, (splay_tree_key) low_value);
if (!node && (low_value || high_value))
{
splay_tree_node low_bound;
splay_tree_node high_bound;
low_bound = splay_tree_predecessor (cases,
(splay_tree_key) low_value);
high_bound = splay_tree_successor (cases,
(splay_tree_key) low_value);
if (low_bound
&& CASE_HIGH ((tree) low_bound->value)
&& tree_int_cst_compare (CASE_HIGH ((tree) low_bound->value),
low_value) >= 0)
node = low_bound;
else if (high_bound
&& high_value
&& (tree_int_cst_compare ((tree) high_bound->key,
high_value)
<= 0))
node = high_bound;
}
if (node)
{
tree duplicate = CASE_LABEL ((tree) node->value);
if (high_value)
{
error ("duplicate (or overlapping) case value");
error ("%Jthis is the first entry overlapping that value", duplicate);
}
else if (low_value)
{
error ("duplicate case value") ;
error ("%Jpreviously used here", duplicate);
}
else
{
error ("multiple default labels in one switch");
error ("%Jthis is the first default label", duplicate);
}
goto error_out;
}
case_label = add_stmt (build_case_label (low_value, high_value, label));
splay_tree_insert (cases,
(splay_tree_key) low_value,
(splay_tree_value) case_label);
return case_label;
error_out:
if (!cases->root)
{
tree t = create_artificial_label ();
add_stmt (build_stmt (LABEL_EXPR, t));
}
return error_mark_node;
}
static void
match_case_to_enum_1 (tree key, tree type, tree label)
{
char buf[2 + 2*HOST_BITS_PER_WIDE_INT/4 + 1];
if (TREE_INT_CST_HIGH (key) == 0)
snprintf (buf, sizeof (buf), HOST_WIDE_INT_PRINT_UNSIGNED,
TREE_INT_CST_LOW (key));
else if (!TYPE_UNSIGNED (type)
&& TREE_INT_CST_HIGH (key) == -1
&& TREE_INT_CST_LOW (key) != 0)
snprintf (buf, sizeof (buf), "-" HOST_WIDE_INT_PRINT_UNSIGNED,
-TREE_INT_CST_LOW (key));
else
snprintf (buf, sizeof (buf), HOST_WIDE_INT_PRINT_DOUBLE_HEX,
TREE_INT_CST_HIGH (key), TREE_INT_CST_LOW (key));
if (TYPE_NAME (type) == 0)
warning ("%Jcase value %qs not in enumerated type",
CASE_LABEL (label), buf);
else
warning ("%Jcase value %qs not in enumerated type %qT",
CASE_LABEL (label), buf, type);
}
static int
match_case_to_enum (splay_tree_node node, void *data)
{
tree label = (tree) node->value;
tree type = (tree) data;
if (!CASE_LOW (label))
return 0;
if (!TREE_ADDRESSABLE (label))
match_case_to_enum_1 (CASE_LOW (label), type, label);
else
TREE_ADDRESSABLE (label) = 0;
if (CASE_HIGH (label))
{
tree chain, key = CASE_HIGH (label);
for (chain = TYPE_VALUES (type);
chain && !tree_int_cst_equal (key, TREE_VALUE (chain));
chain = TREE_CHAIN (chain))
continue;
if (!chain)
match_case_to_enum_1 (key, type, label);
}
return 0;
}
void
c_do_switch_warnings (splay_tree cases, tree switch_stmt)
{
splay_tree_node default_node;
location_t switch_location;
tree type;
if (!warn_switch && !warn_switch_enum && !warn_switch_default)
return;
if (EXPR_HAS_LOCATION (switch_stmt))
switch_location = EXPR_LOCATION (switch_stmt);
else
switch_location = input_location;
type = SWITCH_TYPE (switch_stmt);
default_node = splay_tree_lookup (cases, (splay_tree_key) NULL);
if (warn_switch_default && !default_node)
warning ("%Hswitch missing default case", &switch_location);
if (((warn_switch && !default_node) || warn_switch_enum)
&& type && TREE_CODE (type) == ENUMERAL_TYPE
&& TREE_CODE (SWITCH_COND (switch_stmt)) != INTEGER_CST)
{
tree chain;
for (chain = TYPE_VALUES (type); chain; chain = TREE_CHAIN (chain))
{
splay_tree_node node
= splay_tree_lookup (cases, (splay_tree_key) TREE_VALUE (chain));
if (node)
{
tree label = (tree) node->value;
TREE_ADDRESSABLE (label) = 1;
}
else
{
warning ("%Henumeration value %qE not handled in switch",
&switch_location, TREE_PURPOSE (chain));
}
}
splay_tree_foreach (cases, match_case_to_enum, type);
}
}
tree
finish_label_address_expr (tree label)
{
tree result;
if (pedantic)
pedwarn ("taking the address of a label is non-standard");
if (label == error_mark_node)
return error_mark_node;
label = lookup_label (label);
if (label == NULL_TREE)
result = null_pointer_node;
else
{
TREE_USED (label) = 1;
result = build1 (ADDR_EXPR, ptr_type_node, label);
}
return result;
}
rtx
c_expand_expr (tree exp, rtx target, enum machine_mode tmode,
int modifier ,
rtx *alt_rtl)
{
switch (TREE_CODE (exp))
{
case COMPOUND_LITERAL_EXPR:
{
tree decl = COMPOUND_LITERAL_EXPR_DECL (exp);
emit_local_var (decl);
return expand_expr_real (decl, target, tmode, modifier, alt_rtl);
}
default:
gcc_unreachable ();
}
}
tree
c_staticp (tree exp)
{
return (TREE_CODE (exp) == COMPOUND_LITERAL_EXPR
&& TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (exp))
? exp : NULL);
}
tree
boolean_increment (enum tree_code code, tree arg)
{
tree val;
tree true_res = boolean_true_node;
arg = stabilize_reference (arg);
switch (code)
{
case PREINCREMENT_EXPR:
val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res);
break;
case POSTINCREMENT_EXPR:
val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg, true_res);
arg = save_expr (arg);
val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg);
val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val);
break;
case PREDECREMENT_EXPR:
val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg,
invert_truthvalue (arg));
break;
case POSTDECREMENT_EXPR:
val = build2 (MODIFY_EXPR, TREE_TYPE (arg), arg,
invert_truthvalue (arg));
arg = save_expr (arg);
val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), val, arg);
val = build2 (COMPOUND_EXPR, TREE_TYPE (arg), arg, val);
break;
default:
gcc_unreachable ();
}
TREE_SIDE_EFFECTS (val) = 1;
return val;
}
void
c_stddef_cpp_builtins(void)
{
builtin_define_with_value ("__SIZE_TYPE__", SIZE_TYPE, 0);
builtin_define_with_value ("__PTRDIFF_TYPE__", PTRDIFF_TYPE, 0);
builtin_define_with_value ("__WCHAR_TYPE__", MODIFIED_WCHAR_TYPE, 0);
builtin_define_with_value ("__WINT_TYPE__", WINT_TYPE, 0);
builtin_define_with_value ("__INTMAX_TYPE__", INTMAX_TYPE, 0);
builtin_define_with_value ("__UINTMAX_TYPE__", UINTMAX_TYPE, 0);
}
static void
c_init_attributes (void)
{
#define DEF_ATTR_NULL_TREE(ENUM) \
built_in_attributes[(int) ENUM] = NULL_TREE;
#define DEF_ATTR_INT(ENUM, VALUE) \
built_in_attributes[(int) ENUM] = build_int_cst (NULL_TREE, VALUE);
#define DEF_ATTR_IDENT(ENUM, STRING) \
built_in_attributes[(int) ENUM] = get_identifier (STRING);
#define DEF_ATTR_TREE_LIST(ENUM, PURPOSE, VALUE, CHAIN) \
built_in_attributes[(int) ENUM] \
= tree_cons (built_in_attributes[(int) PURPOSE], \
built_in_attributes[(int) VALUE], \
built_in_attributes[(int) CHAIN]);
#include "builtin-attrs.def"
#undef DEF_ATTR_NULL_TREE
#undef DEF_ATTR_INT
#undef DEF_ATTR_IDENT
#undef DEF_ATTR_TREE_LIST
}
static tree
handle_packed_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int flags, bool *no_add_attrs)
{
if (TYPE_P (*node))
{
if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
*node = build_variant_type_copy (*node);
TYPE_PACKED (*node) = 1;
if (TYPE_MAIN_VARIANT (*node) == *node)
{
tree probe;
for (probe = *node; probe; probe = TYPE_NEXT_VARIANT (probe))
TYPE_PACKED (probe) = 1;
}
}
else if (TREE_CODE (*node) == FIELD_DECL)
DECL_PACKED (*node) = 1;
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_nocommon_attribute (tree *node, tree name,
tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
if (TREE_CODE (*node) == VAR_DECL)
DECL_COMMON (*node) = 0;
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_common_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
if (TREE_CODE (*node) == VAR_DECL)
DECL_COMMON (*node) = 1;
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_noreturn_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree type = TREE_TYPE (*node);
if (TREE_CODE (*node) == FUNCTION_DECL)
TREE_THIS_VOLATILE (*node) = 1;
else if (TREE_CODE (type) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
TREE_TYPE (*node)
= build_pointer_type
(build_type_variant (TREE_TYPE (type),
TYPE_READONLY (TREE_TYPE (type)), 1));
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_noinline_attribute (tree *node, tree name,
tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
if (TREE_CODE (*node) == FUNCTION_DECL)
DECL_UNINLINABLE (*node) = 1;
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_always_inline_attribute (tree *node, tree name,
tree ARG_UNUSED (args),
int ARG_UNUSED (flags),
bool *no_add_attrs)
{
if (TREE_CODE (*node) == FUNCTION_DECL)
{
}
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_used_attribute (tree *pnode, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree node = *pnode;
if (TREE_CODE (node) == FUNCTION_DECL
|| (TREE_CODE (node) == VAR_DECL && TREE_STATIC (node)))
{
TREE_USED (node) = 1;
DECL_PRESERVE_P (node) = 1;
}
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_unused_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int flags, bool *no_add_attrs)
{
if (DECL_P (*node))
{
tree decl = *node;
if (TREE_CODE (decl) == PARM_DECL
|| TREE_CODE (decl) == VAR_DECL
|| TREE_CODE (decl) == FUNCTION_DECL
|| TREE_CODE (decl) == LABEL_DECL
|| TREE_CODE (decl) == TYPE_DECL)
TREE_USED (decl) = 1;
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
}
else
{
if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
*node = build_variant_type_copy (*node);
TREE_USED (*node) = 1;
}
return NULL_TREE;
}
static tree
handle_const_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree type = TREE_TYPE (*node);
if (TREE_CODE (*node) == FUNCTION_DECL)
TREE_READONLY (*node) = 1;
else if (TREE_CODE (type) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
TREE_TYPE (*node)
= build_pointer_type
(build_type_variant (TREE_TYPE (type), 1,
TREE_THIS_VOLATILE (TREE_TYPE (type))));
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_transparent_union_attribute (tree *node, tree name,
tree ARG_UNUSED (args), int flags,
bool *no_add_attrs)
{
tree decl = NULL_TREE;
tree *type = NULL;
int is_type = 0;
if (DECL_P (*node))
{
decl = *node;
type = &TREE_TYPE (decl);
is_type = TREE_CODE (*node) == TYPE_DECL;
}
else if (TYPE_P (*node))
type = node, is_type = 1;
if (is_type
&& TREE_CODE (*type) == UNION_TYPE
&& (decl == 0
|| (TYPE_FIELDS (*type) != 0
&& TYPE_MODE (*type) == DECL_MODE (TYPE_FIELDS (*type)))))
{
if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
*type = build_variant_type_copy (*type);
TYPE_TRANSPARENT_UNION (*type) = 1;
}
else if (decl != 0 && TREE_CODE (decl) == PARM_DECL
&& TREE_CODE (*type) == UNION_TYPE
&& TYPE_MODE (*type) == DECL_MODE (TYPE_FIELDS (*type)))
DECL_TRANSPARENT_UNION (decl) = 1;
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_constructor_attribute (tree *node, tree name,
tree ARG_UNUSED (args),
int ARG_UNUSED (flags),
bool *no_add_attrs)
{
tree decl = *node;
tree type = TREE_TYPE (decl);
if (TREE_CODE (decl) == FUNCTION_DECL
&& TREE_CODE (type) == FUNCTION_TYPE
&& decl_function_context (decl) == 0)
{
DECL_STATIC_CONSTRUCTOR (decl) = 1;
TREE_USED (decl) = 1;
}
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_destructor_attribute (tree *node, tree name,
tree ARG_UNUSED (args),
int ARG_UNUSED (flags),
bool *no_add_attrs)
{
tree decl = *node;
tree type = TREE_TYPE (decl);
if (TREE_CODE (decl) == FUNCTION_DECL
&& TREE_CODE (type) == FUNCTION_TYPE
&& decl_function_context (decl) == 0)
{
DECL_STATIC_DESTRUCTOR (decl) = 1;
TREE_USED (decl) = 1;
}
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_mode_attribute (tree *node, tree name, tree args,
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree type = *node;
*no_add_attrs = true;
if (TREE_CODE (TREE_VALUE (args)) != IDENTIFIER_NODE)
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
else
{
int j;
const char *p = IDENTIFIER_POINTER (TREE_VALUE (args));
int len = strlen (p);
enum machine_mode mode = VOIDmode;
tree typefm;
bool valid_mode;
if (len > 4 && p[0] == '_' && p[1] == '_'
&& p[len - 1] == '_' && p[len - 2] == '_')
{
char *newp = (char *) alloca (len - 1);
strcpy (newp, &p[2]);
newp[len - 4] = '\0';
p = newp;
}
if (! strcmp (p, "byte"))
mode = byte_mode;
else if (!strcmp (p, "word"))
mode = word_mode;
else if (! strcmp (p, "pointer"))
mode = ptr_mode;
else
for (j = 0; j < NUM_MACHINE_MODES; j++)
if (!strcmp (p, GET_MODE_NAME (j)))
mode = (enum machine_mode) j;
if (mode == VOIDmode)
{
error ("unknown machine mode %<%s%>", p);
return NULL_TREE;
}
valid_mode = false;
switch (GET_MODE_CLASS (mode))
{
case MODE_INT:
case MODE_PARTIAL_INT:
case MODE_FLOAT:
valid_mode = targetm.scalar_mode_supported_p (mode);
break;
case MODE_COMPLEX_INT:
case MODE_COMPLEX_FLOAT:
valid_mode = targetm.scalar_mode_supported_p (GET_MODE_INNER (mode));
break;
case MODE_VECTOR_INT:
case MODE_VECTOR_FLOAT:
warning ("specifying vector types with __attribute__ ((mode)) "
"is deprecated");
warning ("use __attribute__ ((vector_size)) instead");
valid_mode = vector_mode_valid_p (mode);
break;
default:
break;
}
if (!valid_mode)
{
error ("unable to emulate %<%s%>", p);
return NULL_TREE;
}
if (POINTER_TYPE_P (type))
{
tree (*fn)(tree, enum machine_mode, bool);
if (!targetm.valid_pointer_mode (mode))
{
error ("invalid pointer mode %<%s%>", p);
return NULL_TREE;
}
if (TREE_CODE (type) == POINTER_TYPE)
fn = build_pointer_type_for_mode;
else
fn = build_reference_type_for_mode;
typefm = fn (TREE_TYPE (type), mode, false);
}
else
typefm = lang_hooks.types.type_for_mode (mode, TYPE_UNSIGNED (type));
if (typefm == NULL_TREE)
{
error ("no data type for mode %<%s%>", p);
return NULL_TREE;
}
else if (TREE_CODE (type) == ENUMERAL_TYPE)
{
if (TREE_CODE (typefm) != INTEGER_TYPE)
{
error ("cannot use mode %qs for enumeral types",
GET_MODE_NAME (mode));
return NULL_TREE;
}
if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
type = build_variant_type_copy (type);
TYPE_PRECISION (type) = TYPE_PRECISION (typefm);
typefm = type;
}
*node = typefm;
}
return NULL_TREE;
}
static tree
handle_section_attribute (tree *node, tree ARG_UNUSED (name), tree args,
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree decl = *node;
if (targetm.have_named_sections)
{
user_defined_section_attribute = true;
if ((TREE_CODE (decl) == FUNCTION_DECL
|| TREE_CODE (decl) == VAR_DECL)
&& TREE_CODE (TREE_VALUE (args)) == STRING_CST)
{
if (TREE_CODE (decl) == VAR_DECL
&& current_function_decl != NULL_TREE
&& ! TREE_STATIC (decl))
{
error ("%Jsection attribute cannot be specified for "
"local variables", decl);
*no_add_attrs = true;
}
else if (DECL_SECTION_NAME (decl) != NULL_TREE
&& strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)),
TREE_STRING_POINTER (TREE_VALUE (args))) != 0)
{
error ("%Jsection of %qD conflicts with previous declaration",
*node, *node);
*no_add_attrs = true;
}
else
DECL_SECTION_NAME (decl) = TREE_VALUE (args);
}
else
{
error ("%Jsection attribute not allowed for %qD", *node, *node);
*no_add_attrs = true;
}
}
else
{
error ("%Jsection attributes are not supported for this target", *node);
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_aligned_attribute (tree *node, tree ARG_UNUSED (name), tree args,
int flags, bool *no_add_attrs)
{
tree decl = NULL_TREE;
tree *type = NULL;
int is_type = 0;
tree align_expr = (args ? TREE_VALUE (args)
: size_int (BIGGEST_ALIGNMENT / BITS_PER_UNIT));
int i;
if (DECL_P (*node))
{
decl = *node;
type = &TREE_TYPE (decl);
is_type = TREE_CODE (*node) == TYPE_DECL;
}
else if (TYPE_P (*node))
type = node, is_type = 1;
while (TREE_CODE (align_expr) == NOP_EXPR
|| TREE_CODE (align_expr) == CONVERT_EXPR
|| TREE_CODE (align_expr) == NON_LVALUE_EXPR)
align_expr = TREE_OPERAND (align_expr, 0);
if (TREE_CODE (align_expr) != INTEGER_CST)
{
error ("requested alignment is not a constant");
*no_add_attrs = true;
}
else if ((i = tree_log2 (align_expr)) == -1)
{
error ("requested alignment is not a power of 2");
*no_add_attrs = true;
}
else if (i > HOST_BITS_PER_INT - 2)
{
error ("requested alignment is too large");
*no_add_attrs = true;
}
else if (is_type)
{
if (decl && TREE_TYPE (decl) != error_mark_node
&& DECL_ORIGINAL_TYPE (decl) == NULL_TREE)
{
tree tt = TREE_TYPE (decl);
*type = build_variant_type_copy (*type);
DECL_ORIGINAL_TYPE (decl) = tt;
TYPE_NAME (*type) = decl;
TREE_USED (*type) = TREE_USED (decl);
TREE_TYPE (decl) = *type;
}
else if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
*type = build_variant_type_copy (*type);
TYPE_ALIGN (*type) = (1 << i) * BITS_PER_UNIT;
TYPE_USER_ALIGN (*type) = 1;
}
else if (TREE_CODE (decl) != VAR_DECL
&& TREE_CODE (decl) != FIELD_DECL)
{
error ("%Jalignment may not be specified for %qD", decl, decl);
*no_add_attrs = true;
}
else
{
DECL_ALIGN (decl) = (1 << i) * BITS_PER_UNIT;
DECL_USER_ALIGN (decl) = 1;
}
return NULL_TREE;
}
static tree
handle_weak_attribute (tree *node, tree ARG_UNUSED (name),
tree ARG_UNUSED (args),
int ARG_UNUSED (flags),
bool * ARG_UNUSED (no_add_attrs))
{
declare_weak (*node);
return NULL_TREE;
}
static tree
handle_alias_attribute (tree *node, tree name, tree args,
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree decl = *node;
if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl))
|| (TREE_CODE (decl) != FUNCTION_DECL && ! DECL_EXTERNAL (decl)))
{
error ("%J%qD defined both normally and as an alias", decl, decl);
*no_add_attrs = true;
}
else if (decl_function_context (decl) == 0 && current_function_decl == NULL)
{
tree id;
id = TREE_VALUE (args);
if (TREE_CODE (id) != STRING_CST)
{
error ("alias arg not a string");
*no_add_attrs = true;
return NULL_TREE;
}
id = get_identifier (TREE_STRING_POINTER (id));
TREE_USED (id) = 1;
if (TREE_CODE (decl) == FUNCTION_DECL)
DECL_INITIAL (decl) = error_mark_node;
else
{
DECL_EXTERNAL (decl) = 0;
TREE_STATIC (decl) = 1;
}
}
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_visibility_attribute (tree *node, tree name, tree args,
int ARG_UNUSED (flags),
bool *no_add_attrs)
{
tree decl = *node;
tree id = TREE_VALUE (args);
*no_add_attrs = true;
if (TYPE_P (*node))
{
if (TREE_CODE (*node) != RECORD_TYPE && TREE_CODE (*node) != UNION_TYPE)
{
warning ("%qs attribute ignored on non-class types",
IDENTIFIER_POINTER (name));
return NULL_TREE;
}
}
else if (decl_function_context (decl) != 0 || ! TREE_PUBLIC (decl))
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
return NULL_TREE;
}
if (TREE_CODE (id) != STRING_CST)
{
error ("visibility arg not a string");
return NULL_TREE;
}
if (TYPE_P (decl))
{
decl = TYPE_NAME (decl);
if (! decl)
return NULL_TREE;
}
if (strcmp (TREE_STRING_POINTER (id), "default") == 0)
DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
else if (strcmp (TREE_STRING_POINTER (id), "internal") == 0)
DECL_VISIBILITY (decl) = VISIBILITY_INTERNAL;
else if (strcmp (TREE_STRING_POINTER (id), "hidden") == 0)
DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
else if (strcmp (TREE_STRING_POINTER (id), "protected") == 0)
DECL_VISIBILITY (decl) = VISIBILITY_PROTECTED;
else
error ("visibility arg must be one of \"default\", \"hidden\", \"protected\" or \"internal\"");
DECL_VISIBILITY_SPECIFIED (decl) = 1;
if (DECL_P (*node))
*no_add_attrs = false;
return NULL_TREE;
}
bool
c_determine_visibility (tree decl)
{
gcc_assert (TREE_CODE (decl) == VAR_DECL
|| TREE_CODE (decl) == FUNCTION_DECL);
if (lookup_attribute ("visibility", DECL_ATTRIBUTES (decl)))
return true;
if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
&& lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl)))
{
DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
DECL_VISIBILITY_SPECIFIED (decl) = 1;
return true;
}
return false;
}
static tree
handle_tls_model_attribute (tree *node, tree name, tree args,
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree decl = *node;
if (! DECL_THREAD_LOCAL (decl))
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
else
{
tree id;
id = TREE_VALUE (args);
if (TREE_CODE (id) != STRING_CST)
{
error ("tls_model arg not a string");
*no_add_attrs = true;
return NULL_TREE;
}
if (strcmp (TREE_STRING_POINTER (id), "local-exec")
&& strcmp (TREE_STRING_POINTER (id), "initial-exec")
&& strcmp (TREE_STRING_POINTER (id), "local-dynamic")
&& strcmp (TREE_STRING_POINTER (id), "global-dynamic"))
{
error ("tls_model arg must be one of \"local-exec\", \"initial-exec\", \"local-dynamic\" or \"global-dynamic\"");
*no_add_attrs = true;
return NULL_TREE;
}
}
return NULL_TREE;
}
static tree
handle_no_instrument_function_attribute (tree *node, tree name,
tree ARG_UNUSED (args),
int ARG_UNUSED (flags),
bool *no_add_attrs)
{
tree decl = *node;
if (TREE_CODE (decl) != FUNCTION_DECL)
{
error ("%J%qE attribute applies only to functions", decl, name);
*no_add_attrs = true;
}
else if (DECL_INITIAL (decl))
{
error ("%Jcan%'t set %qE attribute after definition", decl, name);
*no_add_attrs = true;
}
else
DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1;
return NULL_TREE;
}
static tree
handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
if (TREE_CODE (*node) == FUNCTION_DECL)
DECL_IS_MALLOC (*node) = 1;
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_no_limit_stack_attribute (tree *node, tree name,
tree ARG_UNUSED (args),
int ARG_UNUSED (flags),
bool *no_add_attrs)
{
tree decl = *node;
if (TREE_CODE (decl) != FUNCTION_DECL)
{
error ("%J%qE attribute applies only to functions", decl, name);
*no_add_attrs = true;
}
else if (DECL_INITIAL (decl))
{
error ("%Jcan%'t set %qE attribute after definition", decl, name);
*no_add_attrs = true;
}
else
DECL_NO_LIMIT_STACK (decl) = 1;
return NULL_TREE;
}
static tree
handle_pure_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
if (TREE_CODE (*node) == FUNCTION_DECL)
DECL_IS_PURE (*node) = 1;
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_deprecated_attribute (tree *node, tree name,
tree ARG_UNUSED (args), int flags,
bool *no_add_attrs)
{
tree type = NULL_TREE;
int warn = 0;
const char *what = NULL;
if (DECL_P (*node))
{
tree decl = *node;
type = TREE_TYPE (decl);
if (TREE_CODE (decl) == TYPE_DECL
|| TREE_CODE (decl) == PARM_DECL
|| TREE_CODE (decl) == VAR_DECL
|| TREE_CODE (decl) == FUNCTION_DECL
|| TREE_CODE (decl) == FIELD_DECL)
TREE_DEPRECATED (decl) = 1;
else
warn = 1;
}
else if (TYPE_P (*node))
{
if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
*node = build_variant_type_copy (*node);
TREE_DEPRECATED (*node) = 1;
type = *node;
}
else
warn = 1;
if (warn)
{
*no_add_attrs = true;
if (type && TYPE_NAME (type))
{
if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
what = IDENTIFIER_POINTER (TYPE_NAME (*node));
else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
&& DECL_NAME (TYPE_NAME (type)))
what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
}
if (what)
warning ("%qs attribute ignored for %qs",
IDENTIFIER_POINTER (name), what);
else
warning ("%qs attribute ignored",
IDENTIFIER_POINTER (name));
}
return NULL_TREE;
}
static tree
handle_unavailable_attribute (tree *node, tree name,
tree args ATTRIBUTE_UNUSED,
int flags ATTRIBUTE_UNUSED,
bool *no_add_attrs)
{
tree type = NULL_TREE;
int warn = 0;
const char *what = NULL;
if (DECL_P (*node))
{
tree decl = *node;
type = TREE_TYPE (decl);
if (TREE_CODE (decl) == TYPE_DECL
|| TREE_CODE (decl) == PARM_DECL
|| TREE_CODE (decl) == VAR_DECL
|| TREE_CODE (decl) == FUNCTION_DECL
|| TREE_CODE (decl) == FIELD_DECL)
{
TREE_DEPRECATED (decl) = 1;
TREE_UNAVAILABLE (decl) = 1;
}
else
warn = 1;
}
else if (TYPE_P (*node))
{
if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
*node = build_variant_type_copy (*node);
TREE_DEPRECATED (*node) = 1;
TREE_UNAVAILABLE (*node) = 1;
type = *node;
}
else
warn = 1;
if (warn)
{
*no_add_attrs = true;
if (type && TYPE_NAME (type))
{
if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
what = IDENTIFIER_POINTER (TYPE_NAME (*node));
else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
&& DECL_NAME (TYPE_NAME (type)))
what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
}
if (what)
warning ("`%s' attribute ignored for `%s'",
IDENTIFIER_POINTER (name), what);
else
warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
}
return NULL_TREE;
}
static tree
handle_vector_size_attribute (tree *node, tree name, tree args,
int ARG_UNUSED (flags),
bool *no_add_attrs)
{
unsigned HOST_WIDE_INT vecsize, nunits;
enum machine_mode orig_mode;
tree type = *node, new_type, size;
*no_add_attrs = true;
size = TREE_VALUE (args);
if (TREE_CODE (size) == NON_LVALUE_EXPR)
size = TREE_OPERAND (size, 0);
if (! host_integerp (size, 1))
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
return NULL_TREE;
}
vecsize = tree_low_cst (size, 1);
while (POINTER_TYPE_P (type)
|| TREE_CODE (type) == FUNCTION_TYPE
|| TREE_CODE (type) == METHOD_TYPE
|| TREE_CODE (type) == ARRAY_TYPE)
type = TREE_TYPE (type);
orig_mode = TYPE_MODE (type);
if (TREE_CODE (type) == RECORD_TYPE
|| (GET_MODE_CLASS (orig_mode) != MODE_FLOAT
&& GET_MODE_CLASS (orig_mode) != MODE_INT)
|| ! host_integerp (TYPE_SIZE_UNIT (type), 1))
{
error ("invalid vector type for attribute %qs",
IDENTIFIER_POINTER (name));
return NULL_TREE;
}
nunits = vecsize / tree_low_cst (TYPE_SIZE_UNIT (type), 1);
if (nunits & (nunits - 1))
{
error ("number of components of the vector not a power of two");
return NULL_TREE;
}
new_type = build_vector_type (type, nunits);
*node = reconstruct_complex_type (*node, new_type);
return NULL_TREE;
}
static tree
handle_nonnull_attribute (tree *node, tree ARG_UNUSED (name),
tree args, int ARG_UNUSED (flags),
bool *no_add_attrs)
{
tree type = *node;
unsigned HOST_WIDE_INT attr_arg_num;
if (! args)
{
if (! TYPE_ARG_TYPES (type))
{
error ("nonnull attribute without arguments on a non-prototype");
*no_add_attrs = true;
}
return NULL_TREE;
}
for (attr_arg_num = 1; args; args = TREE_CHAIN (args))
{
tree argument;
unsigned HOST_WIDE_INT arg_num = 0, ck_num;
if (! get_nonnull_operand (TREE_VALUE (args), &arg_num))
{
error ("nonnull argument has invalid operand number (arg %lu)",
(unsigned long) attr_arg_num);
*no_add_attrs = true;
return NULL_TREE;
}
argument = TYPE_ARG_TYPES (type);
if (argument)
{
for (ck_num = 1; ; ck_num++)
{
if (! argument || ck_num == arg_num)
break;
argument = TREE_CHAIN (argument);
}
if (! argument
|| TREE_CODE (TREE_VALUE (argument)) == VOID_TYPE)
{
error ("nonnull argument with out-of-range operand number (arg %lu, operand %lu)",
(unsigned long) attr_arg_num, (unsigned long) arg_num);
*no_add_attrs = true;
return NULL_TREE;
}
if (TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE)
{
error ("nonnull argument references non-pointer operand (arg %lu, operand %lu)",
(unsigned long) attr_arg_num, (unsigned long) arg_num);
*no_add_attrs = true;
return NULL_TREE;
}
}
}
return NULL_TREE;
}
static void
check_function_nonnull (tree attrs, tree params)
{
tree a, args, param;
int param_num;
for (a = attrs; a; a = TREE_CHAIN (a))
{
if (is_attribute_p ("nonnull", TREE_PURPOSE (a)))
{
args = TREE_VALUE (a);
for (param = params, param_num = 1; ;
param_num++, param = TREE_CHAIN (param))
{
if (! param)
break;
if (! args || nonnull_check_p (args, param_num))
check_function_arguments_recurse (check_nonnull_arg, NULL,
TREE_VALUE (param),
param_num);
}
}
}
}
static void
check_function_sentinel (tree attrs, tree params)
{
tree attr = lookup_attribute ("sentinel", attrs);
if (attr)
{
if (!params)
warning ("missing sentinel in function call");
else
{
tree sentinel, end;
unsigned pos = 0;
if (TREE_VALUE (attr))
{
tree p = TREE_VALUE (TREE_VALUE (attr));
STRIP_NOPS (p);
pos = TREE_INT_CST_LOW (p);
}
sentinel = end = params;
while (pos > 0 && TREE_CHAIN (end))
{
pos--;
end = TREE_CHAIN (end);
}
if (pos > 0)
{
warning ("not enough arguments to fit a sentinel");
return;
}
while (TREE_CHAIN (end))
{
end = TREE_CHAIN (end);
sentinel = TREE_CHAIN (sentinel);
}
if (!POINTER_TYPE_P (TREE_TYPE (TREE_VALUE (sentinel)))
|| !integer_zerop (TREE_VALUE (sentinel)))
warning ("missing sentinel in function call");
}
}
}
static bool
nonnull_check_p (tree args, unsigned HOST_WIDE_INT param_num)
{
unsigned HOST_WIDE_INT arg_num = 0;
for (; args; args = TREE_CHAIN (args))
{
bool found = get_nonnull_operand (TREE_VALUE (args), &arg_num);
gcc_assert (found);
if (arg_num == param_num)
return true;
}
return false;
}
static void
check_nonnull_arg (void * ARG_UNUSED (ctx), tree param,
unsigned HOST_WIDE_INT param_num)
{
if (TREE_CODE (TREE_TYPE (param)) != POINTER_TYPE)
return;
if (integer_zerop (param))
warning ("null argument where non-null required (arg %lu)",
(unsigned long) param_num);
}
static bool
get_nonnull_operand (tree arg_num_expr, unsigned HOST_WIDE_INT *valp)
{
while (TREE_CODE (arg_num_expr) == NOP_EXPR
|| TREE_CODE (arg_num_expr) == CONVERT_EXPR
|| TREE_CODE (arg_num_expr) == NON_LVALUE_EXPR)
arg_num_expr = TREE_OPERAND (arg_num_expr, 0);
if (TREE_CODE (arg_num_expr) != INTEGER_CST
|| TREE_INT_CST_HIGH (arg_num_expr) != 0)
return false;
*valp = TREE_INT_CST_LOW (arg_num_expr);
return true;
}
static tree
handle_nothrow_attribute (tree *node, tree name, tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
if (TREE_CODE (*node) == FUNCTION_DECL)
TREE_NOTHROW (*node) = 1;
else
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_cleanup_attribute (tree *node, tree name, tree args,
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree decl = *node;
tree cleanup_id, cleanup_decl;
if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
return NULL_TREE;
}
cleanup_id = TREE_VALUE (args);
if (TREE_CODE (cleanup_id) != IDENTIFIER_NODE)
{
error ("cleanup arg not an identifier");
*no_add_attrs = true;
return NULL_TREE;
}
cleanup_decl = lookup_name (cleanup_id);
if (!cleanup_decl || TREE_CODE (cleanup_decl) != FUNCTION_DECL)
{
error ("cleanup arg not a function");
*no_add_attrs = true;
return NULL_TREE;
}
return NULL_TREE;
}
static tree
handle_warn_unused_result_attribute (tree *node, tree name,
tree ARG_UNUSED (args),
int ARG_UNUSED (flags), bool *no_add_attrs)
{
if (VOID_TYPE_P (TREE_TYPE (*node)))
{
warning ("%qs attribute ignored", IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
return NULL_TREE;
}
static tree
handle_sentinel_attribute (tree *node, tree name, tree args,
int ARG_UNUSED (flags), bool *no_add_attrs)
{
tree params = TYPE_ARG_TYPES (*node);
if (!params)
{
warning ("%qs attribute requires prototypes with named arguments",
IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
else
{
while (TREE_CHAIN (params))
params = TREE_CHAIN (params);
if (VOID_TYPE_P (TREE_VALUE (params)))
{
warning ("%qs attribute only applies to variadic functions",
IDENTIFIER_POINTER (name));
*no_add_attrs = true;
}
}
if (args)
{
tree position = TREE_VALUE (args);
STRIP_NOPS (position);
if (TREE_CODE (position) != INTEGER_CST)
{
warning ("requested position is not an integer constant");
*no_add_attrs = true;
}
else
{
if (tree_int_cst_lt (position, integer_zero_node))
{
warning ("requested position is less than zero");
*no_add_attrs = true;
}
}
}
return NULL_TREE;
}
void
check_function_arguments (tree attrs, tree params)
{
if (warn_nonnull)
check_function_nonnull (attrs, params);
if (warn_format)
{
check_function_format (attrs, params);
check_function_sentinel (attrs, params);
}
}
void
check_function_arguments_recurse (void (*callback)
(void *, tree, unsigned HOST_WIDE_INT),
void *ctx, tree param,
unsigned HOST_WIDE_INT param_num)
{
if (TREE_CODE (param) == NOP_EXPR)
{
check_function_arguments_recurse (callback, ctx,
TREE_OPERAND (param, 0), param_num);
return;
}
if (TREE_CODE (param) == CALL_EXPR)
{
tree type = TREE_TYPE (TREE_TYPE (TREE_OPERAND (param, 0)));
tree attrs;
bool found_format_arg = false;
for (attrs = TYPE_ATTRIBUTES (type);
attrs;
attrs = TREE_CHAIN (attrs))
if (is_attribute_p ("format_arg", TREE_PURPOSE (attrs)))
{
tree inner_args;
tree format_num_expr;
int format_num;
int i;
format_num_expr = TREE_VALUE (TREE_VALUE (attrs));
while (TREE_CODE (format_num_expr) == NOP_EXPR
|| TREE_CODE (format_num_expr) == CONVERT_EXPR
|| TREE_CODE (format_num_expr) == NON_LVALUE_EXPR)
format_num_expr = TREE_OPERAND (format_num_expr, 0);
gcc_assert (TREE_CODE (format_num_expr) == INTEGER_CST
&& !TREE_INT_CST_HIGH (format_num_expr));
format_num = TREE_INT_CST_LOW (format_num_expr);
for (inner_args = TREE_OPERAND (param, 1), i = 1;
inner_args != 0;
inner_args = TREE_CHAIN (inner_args), i++)
if (i == format_num)
{
check_function_arguments_recurse (callback, ctx,
TREE_VALUE (inner_args),
param_num);
found_format_arg = true;
break;
}
}
if (found_format_arg)
return;
}
if (TREE_CODE (param) == COND_EXPR)
{
check_function_arguments_recurse (callback, ctx,
TREE_OPERAND (param, 1), param_num);
check_function_arguments_recurse (callback, ctx,
TREE_OPERAND (param, 2), param_num);
return;
}
(*callback) (ctx, param, param_num);
}
int
field_decl_cmp (const void *x_p, const void *y_p)
{
const tree *const x = (const tree *const) x_p;
const tree *const y = (const tree *const) y_p;
if (DECL_NAME (*x) == DECL_NAME (*y))
return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL);
if (DECL_NAME (*x) == NULL_TREE)
return -1;
if (DECL_NAME (*y) == NULL_TREE)
return 1;
if (DECL_NAME (*x) < DECL_NAME (*y))
return -1;
return 1;
}
static struct {
gt_pointer_operator new_value;
void *cookie;
} resort_data;
static int
resort_field_decl_cmp (const void *x_p, const void *y_p)
{
const tree *const x = (const tree *const) x_p;
const tree *const y = (const tree *const) y_p;
if (DECL_NAME (*x) == DECL_NAME (*y))
return (TREE_CODE (*y) == TYPE_DECL) - (TREE_CODE (*x) == TYPE_DECL);
if (DECL_NAME (*x) == NULL_TREE)
return -1;
if (DECL_NAME (*y) == NULL_TREE)
return 1;
{
tree d1 = DECL_NAME (*x);
tree d2 = DECL_NAME (*y);
resort_data.new_value (&d1, resort_data.cookie);
resort_data.new_value (&d2, resort_data.cookie);
if (d1 < d2)
return -1;
}
return 1;
}
void
resort_sorted_fields (void *obj,
void * ARG_UNUSED (orig_obj),
gt_pointer_operator new_value,
void *cookie)
{
struct sorted_fields_type *sf = (struct sorted_fields_type *) obj;
resort_data.new_value = new_value;
resort_data.cookie = cookie;
qsort (&sf->elts[0], sf->len, sizeof (tree),
resort_field_decl_cmp);
}
void
c_parse_error (const char *msgid, enum cpp_ttype token, tree value)
{
const char *string = _(msgid);
if (token == CPP_EOF)
error ("%s at end of input", string);
else if (token == CPP_CHAR || token == CPP_WCHAR)
{
unsigned int val = TREE_INT_CST_LOW (value);
const char *const ell = (token == CPP_CHAR) ? "" : "L";
if (val <= UCHAR_MAX && ISGRAPH (val))
error ("%s before %s'%c'", string, ell, val);
else
error ("%s before %s'\\x%x'", string, ell, val);
}
else if (token == CPP_STRING
|| token == CPP_WSTRING)
error ("%s before string constant", string);
else if (token == CPP_NUMBER)
error ("%s before numeric constant", string);
else if (token == CPP_NAME)
error ("%s before \"%s\"", string, IDENTIFIER_POINTER (value));
else if (token < N_TTYPES)
error ("%s before %qs token", string, cpp_type2name (token));
else
error ("%s", string);
}
void
c_warn_unused_result (tree *top_p)
{
tree t = *top_p;
tree_stmt_iterator i;
tree fdecl, ftype;
switch (TREE_CODE (t))
{
case STATEMENT_LIST:
for (i = tsi_start (*top_p); !tsi_end_p (i); tsi_next (&i))
c_warn_unused_result (tsi_stmt_ptr (i));
break;
case COND_EXPR:
c_warn_unused_result (&COND_EXPR_THEN (t));
c_warn_unused_result (&COND_EXPR_ELSE (t));
break;
case BIND_EXPR:
c_warn_unused_result (&BIND_EXPR_BODY (t));
break;
case TRY_FINALLY_EXPR:
case TRY_CATCH_EXPR:
c_warn_unused_result (&TREE_OPERAND (t, 0));
c_warn_unused_result (&TREE_OPERAND (t, 1));
break;
case CATCH_EXPR:
c_warn_unused_result (&CATCH_BODY (t));
break;
case EH_FILTER_EXPR:
c_warn_unused_result (&EH_FILTER_FAILURE (t));
break;
case CALL_EXPR:
if (TREE_USED (t))
break;
fdecl = get_callee_fndecl (t);
if (fdecl)
ftype = TREE_TYPE (fdecl);
else
{
ftype = TREE_TYPE (TREE_OPERAND (t, 0));
ftype = TREE_TYPE (ftype);
}
if (lookup_attribute ("warn_unused_result", TYPE_ATTRIBUTES (ftype)))
{
if (fdecl)
warning ("%Hignoring return value of %qD, "
"declared with attribute warn_unused_result",
EXPR_LOCUS (t), fdecl);
else
warning ("%Hignoring return value of function "
"declared with attribute warn_unused_result",
EXPR_LOCUS (t));
}
break;
default:
break;
}
}
static tree
fold_offsetof_1 (tree expr)
{
enum tree_code code = PLUS_EXPR;
tree base, off, t;
switch (TREE_CODE (expr))
{
case ERROR_MARK:
return expr;
case INDIRECT_REF:
return size_zero_node;
case COMPONENT_REF:
base = fold_offsetof_1 (TREE_OPERAND (expr, 0));
if (base == error_mark_node)
return base;
t = TREE_OPERAND (expr, 1);
if (DECL_C_BIT_FIELD (t))
{
error ("attempt to take address of bit-field structure "
"member %qs", IDENTIFIER_POINTER (DECL_NAME (t)));
return error_mark_node;
}
off = size_binop (PLUS_EXPR, DECL_FIELD_OFFSET (t),
size_int (tree_low_cst (DECL_FIELD_BIT_OFFSET (t), 1)
/ BITS_PER_UNIT));
break;
case ARRAY_REF:
base = fold_offsetof_1 (TREE_OPERAND (expr, 0));
if (base == error_mark_node)
return base;
t = TREE_OPERAND (expr, 1);
if (TREE_CODE (t) == INTEGER_CST && tree_int_cst_sgn (t) < 0)
{
code = MINUS_EXPR;
t = fold (build1 (NEGATE_EXPR, TREE_TYPE (t), t));
}
t = convert (sizetype, t);
off = size_binop (MULT_EXPR, TYPE_SIZE_UNIT (TREE_TYPE (expr)), t);
break;
default:
gcc_unreachable ();
}
return size_binop (code, base, off);
}
tree
fold_offsetof (tree expr)
{
return convert (size_type_node, fold_offsetof_1 (expr));
}
tree
vector_constructor_from_expr (tree expr, tree vector_type)
{
tree list = NULL_TREE, elttype = TREE_TYPE (vector_type);
int index, max_index = TYPE_VECTOR_SUBPARTS (vector_type);
int all_constant = TREE_CONSTANT (expr);
if (TREE_CODE (TREE_TYPE (expr)) == VECTOR_TYPE)
return convert (vector_type, expr);
for (index = 0; index < max_index; ++index)
{
tree elem;
if (TREE_CODE (expr) == COMPOUND_EXPR)
{
elem = TREE_OPERAND (expr, 1);
expr = TREE_OPERAND (expr, 0);
}
else
elem = expr;
while (TREE_CODE (elem) == COMPOUND_EXPR && TREE_CONSTANT (elem))
elem = TREE_OPERAND (elem, 1);
while (TREE_CODE (elem) == CONVERT_EXPR)
elem = TREE_OPERAND (elem, 0);
list = chainon (list,
build_tree_list (NULL_TREE,
convert (elttype, fold (elem))));
}
list = nreverse (list);
list = build_constructor (vector_type, list);
if (c_dialect_cxx ())
TREE_LANG_FLAG_4 (list) = 1;
TREE_CONSTANT (list) = all_constant;
return list;
}
static tree
cw_asm_default_function_conversion (tree exp)
{
tree type = TREE_TYPE (exp);
enum tree_code code = TREE_CODE (type);
while (TREE_CODE (exp) == NON_LVALUE_EXPR
|| (TREE_CODE (exp) == NOP_EXPR
&& TREE_TYPE (TREE_OPERAND (exp, 0)) == TREE_TYPE (exp)))
exp = TREE_OPERAND (exp, 0);
if (code == FUNCTION_TYPE)
return build_unary_op (ADDR_EXPR, exp, 0);
return exp;
}
tree
cw_asm_stmt (tree expr, tree args)
{
tree sexpr;
tree arg, tail;
tree inputs, outputs, clobbers;
tree stmt;
tree str, one;
unsigned int n;
const char *opcodename;
cw_asm_in_operands = 0;
VARRAY_TREE_INIT (cw_asm_operands, 20, "cw_asm_operands");
outputs = NULL_TREE;
inputs = NULL_TREE;
clobbers = NULL_TREE;
STRIP_NOPS (expr);
if (TREE_CODE (expr) == ADDR_EXPR)
expr = TREE_OPERAND (expr, 0);
opcodename = IDENTIFIER_POINTER (expr);
if (strcmp (opcodename, "entry") == 0)
return cw_asm_entry (expr, NULL_TREE, TREE_VALUE (args));
else if (strcmp (opcodename, "fralloc") == 0)
{
DECL_CW_ASM_FRAME_SIZE (current_function_decl) = -1;
if (args)
{
arg = TREE_VALUE (args);
STRIP_NOPS (arg);
if (TREE_CODE (arg) == INTEGER_CST)
{
int intval = tree_low_cst (arg, 0);
if (intval >= 0)
DECL_CW_ASM_FRAME_SIZE (current_function_decl) = intval;
else
error ("fralloc argument must be nonnegative");
}
else
error ("fralloc argument is not an integer");
}
return NULL_TREE;
}
else if (strcmp (opcodename, "frfree") == 0)
{
DECL_CW_ASM_NORETURN (current_function_decl) = 1;
if (DECL_CW_ASM_FRAME_SIZE (current_function_decl) == (unsigned int)-2)
DECL_CW_ASM_FRAME_SIZE (current_function_decl) = (unsigned int)-1;
return NULL_TREE;
}
else if (strcmp (opcodename, "nofralloc") == 0)
{
DECL_CW_ASM_NORETURN (current_function_decl) = 1;
DECL_CW_ASM_FRAME_SIZE (current_function_decl) = -2;
return NULL_TREE;
}
else if (strcmp (opcodename, "machine") == 0)
{
return NULL_TREE;
}
else if (strcmp (opcodename, "opword") == 0)
{
opcodename = ".long";
}
if (cw_asm_buffer == NULL)
cw_asm_buffer = xmalloc (4000);
cw_asm_buffer[0] = '\0';
strncat (cw_asm_buffer, opcodename, IDENTIFIER_LENGTH (expr));
strcat (cw_asm_buffer, " ");
for (tail = args; tail; tail = TREE_CHAIN (tail))
{
arg = TREE_VALUE (tail);
if (tail != args)
strcat (cw_asm_buffer, ",");
print_cw_asm_operand (cw_asm_buffer, arg);
}
sexpr = build_string (strlen (cw_asm_buffer), cw_asm_buffer);
for (n = 0; n < VARRAY_ACTIVE_SIZE (cw_asm_operands); ++n)
{
tree var = VARRAY_TREE (cw_asm_operands, n);
if (TREE_CODE (var) == FUNCTION_DECL)
{
str = build_string (1, "s");
one = build_tree_list (build_tree_list (NULL_TREE, str), var);
inputs = chainon (inputs, one);
}
else
{
if (TREE_CODE (TREE_TYPE (var)) == REAL_TYPE)
str = build_string (2, "+f");
else
if (TREE_CODE (TREE_TYPE (var)) == VECTOR_TYPE)
str = build_string (2, "+v");
else
str = build_string (2, "+b");
one = build_tree_list (build_tree_list (NULL_TREE, str), var);
outputs = chainon (outputs, one);
}
}
for (tail = inputs; tail; tail = TREE_CHAIN (tail))
TREE_VALUE (tail) = cw_asm_default_function_conversion (TREE_VALUE (tail));
stmt = build_stmt (ASM_EXPR, sexpr, outputs, inputs, clobbers);
ASM_VOLATILE_P (stmt) = 1;
stmt = add_stmt (stmt);
return stmt;
}
static int
cw_asm_field_offset (tree arg)
{
return (tree_low_cst (DECL_FIELD_OFFSET (arg), 0)
+ tree_low_cst (DECL_FIELD_BIT_OFFSET (arg), 0) / BITS_PER_UNIT);
}
static void
print_cw_asm_operand (char *buf, tree arg)
{
int idnum;
HOST_WIDE_INT bitsize, bitpos;
tree offset;
enum machine_mode mode;
int unsignedp, volatilep;
tree op0, op1;
int off0 = 0, off1 = 0;
STRIP_NOPS (arg);
switch (TREE_CODE (arg))
{
case INTEGER_CST:
sprintf (buf + strlen (buf), "%lld", tree_low_cst (arg, 0));
break;
case IDENTIFIER_NODE:
strncat (buf, IDENTIFIER_POINTER (arg), IDENTIFIER_LENGTH (arg));
break;
case VAR_DECL:
case PARM_DECL:
if ((idnum = cw_asm_get_register_var (arg)) >= 0)
{
strcat (buf, "%");
sprintf (buf + strlen (buf), "%d", idnum);
}
break;
case FUNCTION_DECL:
if ((idnum = cw_asm_get_register_var (arg)) >= 0)
{
strcat (buf, "%z");
sprintf (buf + strlen (buf), "%d", idnum);
}
break;
case COMPOUND_EXPR:
print_cw_asm_operand (buf, TREE_OPERAND (arg, 0));
strcat (buf, "(");
print_cw_asm_operand (buf, TREE_OPERAND (arg, 1));
strcat (buf, ")");
break;
case PLUS_EXPR:
op0 = TREE_OPERAND (arg, 0);
if (TREE_CODE (op0) == FIELD_DECL)
off0 = cw_asm_field_offset (op0);
else if (TREE_CODE (op0) == INTEGER_CST)
off0 = tree_low_cst (op0, 0);
else
error ("invalid operand for arithmetic in assembly block");
op1 = TREE_OPERAND (arg, 1);
if (TREE_CODE (op1) == FIELD_DECL)
off1 = cw_asm_field_offset (op1);
else if (TREE_CODE (op1) == INTEGER_CST)
off1 = tree_low_cst (op1, 0);
else
error ("invalid operand for arithmetic in assembly block");
sprintf (buf + strlen (buf), "%d", off0 + off1);
break;
case FIELD_DECL:
sprintf (buf + strlen (buf), "%d", cw_asm_field_offset (arg));
break;
case COMPONENT_REF:
get_inner_reference (arg, &bitsize, &bitpos, &offset, &mode, &unsignedp, &volatilep);
sprintf (buf + strlen (buf), "%lld", bitpos / BITS_PER_UNIT);
strcat (buf, "(");
op0 = TREE_OPERAND (arg, 0);
if (TREE_CODE (op0) == VAR_DECL)
print_cw_asm_operand (buf, op0);
else
print_cw_asm_operand (buf, TREE_OPERAND (op0, 0));
strcat (buf, ")");
break;
case ARRAY_REF:
error ("array references not supported");
break;
default:
error ("block assembly operand not recognized");
break;
}
}
static int
cw_asm_get_register_var (tree var)
{
unsigned int n;
for (n = 0; n < VARRAY_ACTIVE_SIZE (cw_asm_operands); ++n)
{
if (var == VARRAY_TREE (cw_asm_operands, n))
return n;
}
VARRAY_PUSH_TREE (cw_asm_operands, var);
return VARRAY_ACTIVE_SIZE (cw_asm_operands) - 1;
}
tree
cw_asm_reg_name (tree id)
{
#ifdef CW_ASM_REGISTER_NAME
char buf[100];
const char *newname = CW_ASM_REGISTER_NAME (IDENTIFIER_POINTER (id), buf);
if (newname)
return get_identifier (newname);
#else
if (decode_reg_name (IDENTIFIER_POINTER (id)) >= 0)
return id;
#endif
return NULL_TREE;
}
tree
cw_asm_label (tree labid, int atsign)
{
tree sexpr;
tree inputs = NULL_TREE, outputs = NULL_TREE, clobbers = NULL_TREE;
tree stmt;
STRIP_NOPS (labid);
if (atsign)
labid = get_atsign_identifier (labid);
if (cw_asm_buffer == NULL)
cw_asm_buffer = xmalloc (4000);
cw_asm_buffer[0] = '\0';
strcat (cw_asm_buffer, IDENTIFIER_POINTER (get_cw_asm_label (labid)));
strcat (cw_asm_buffer, ":");
sexpr = build_string (strlen (cw_asm_buffer), cw_asm_buffer);
stmt = build_stmt (ASM_EXPR, sexpr, outputs, inputs, clobbers);
ASM_VOLATILE_P (stmt) = 1;
stmt = add_stmt (stmt);
return stmt;
}
tree
get_atsign_identifier (tree ident)
{
char *buf = (char *) alloca (IDENTIFIER_LENGTH (ident) + 20);
buf[0] = '@';
strcpy (buf + 1, IDENTIFIER_POINTER (ident));
return get_identifier (buf);
}
void
clear_cw_asm_labels (void)
{
if (!cw_asm_labels)
VARRAY_TREE_INIT (cw_asm_labels, 40, "cw_asm_labels");
if (!cw_asm_labels_uniq)
VARRAY_TREE_INIT (cw_asm_labels_uniq, 40, "cw_asm_labels_uniq");
VARRAY_POP_ALL (cw_asm_labels);
VARRAY_POP_ALL (cw_asm_labels_uniq);
}
tree
get_cw_asm_label (tree labid)
{
unsigned int n;
const char *labname;
char *buf;
tree newid;
for (n = 0; n < VARRAY_ACTIVE_SIZE (cw_asm_labels); ++n)
{
if (labid == VARRAY_TREE (cw_asm_labels, n))
return VARRAY_TREE (cw_asm_labels_uniq, n);
}
VARRAY_PUSH_TREE (cw_asm_labels, labid);
buf = (char *) alloca (IDENTIFIER_LENGTH (labid) + 20);
sprintf (buf, "LASM%d$", cw_asm_labelno++);
labname = IDENTIFIER_POINTER (labid);
if (*labname == '@')
{
strcat (buf, "$");
++labname;
}
strcat (buf, labname);
newid = get_identifier (buf);
VARRAY_PUSH_TREE (cw_asm_labels_uniq, newid);
return newid;
}
tree
cw_asm_build_register_offset (tree offset, tree regname)
{
tree t;
t = make_node (COMPOUND_EXPR);
TREE_TYPE (t) = NULL_TREE;
TREE_OPERAND (t, 0) = offset;
TREE_OPERAND (t, 1) = regname;
return t;
}
tree
cw_asm_entry (tree keyword, tree scspec, tree fn)
{
int externify = 0;
tree stmt, inputs, str, one, strlab;
if (strcmp (IDENTIFIER_POINTER (keyword), "entry") != 0)
{
error ("invalid asm entry statement syntax");
return error_mark_node;
}
if (scspec == NULL || strcmp (IDENTIFIER_POINTER (scspec), "extern") == 0)
externify = 1;
else if (strcmp (IDENTIFIER_POINTER (scspec), "static") == 0)
;
else
{
error ("entry point storage class much be `static' or `extern'");
return error_mark_node;
}
if (fn == NULL_TREE || TREE_CODE (fn) != FUNCTION_DECL)
{
error ("entry point not recognized as a function");
return error_mark_node;
}
fn = cw_asm_default_function_conversion (fn);
str = build_string (1, "s");
one = build_tree_list (build_tree_list (NULL_TREE, str), fn);
inputs = chainon (NULL_TREE, one);
if (externify)
{
strlab = build_string (9, ".globl %0");
stmt = build_stmt (ASM_EXPR, strlab, NULL_TREE, inputs, NULL_TREE);
ASM_VOLATILE_P (stmt) = 1;
stmt = add_stmt (stmt);
}
strlab = build_string (3, "%0:");
stmt = build_stmt (ASM_EXPR, strlab, NULL_TREE, inputs, NULL_TREE);
ASM_VOLATILE_P (stmt) = 1;
stmt = add_stmt (stmt);
return stmt;
}
#include "gt-c-common.h"