/* Subroutines shared by all languages that are variants of C.
- Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
+ Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
This file is part of GNU CC.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
#include "config.h"
+#include "system.h"
#include "tree.h"
#include "c-lex.h"
#include "c-tree.h"
#include "flags.h"
#include "obstack.h"
-#include <stdio.h>
-#include <ctype.h>
+#include "toplev.h"
+#include "output.h"
+
+#if USE_CPPLIB
+#include "cpplib.h"
+cpp_reader parse_in;
+cpp_options parse_options;
+static enum cpp_token cpp_token;
+#endif
+
+#ifndef WCHAR_TYPE_SIZE
+#ifdef INT_TYPE_SIZE
+#define WCHAR_TYPE_SIZE INT_TYPE_SIZE
+#else
+#define WCHAR_TYPE_SIZE BITS_PER_WORD
+#endif
+#endif
extern struct obstack permanent_obstack;
-static void declare_hidden_char_array PROTO((char *, char *));
+/* Nonzero means the expression being parsed will never be evaluated.
+ This is a count, since unevaluated expressions can nest. */
+int skip_evaluation;
+
+enum attrs {A_PACKED, A_NOCOMMON, A_COMMON, A_NORETURN, A_CONST, A_T_UNION,
+ A_CONSTRUCTOR, A_DESTRUCTOR, A_MODE, A_SECTION, A_ALIGNED,
+ A_UNUSED, A_FORMAT, A_FORMAT_ARG, A_WEAK, A_ALIAS};
+
+enum format_type { printf_format_type, scanf_format_type,
+ strftime_format_type };
+
+static void declare_hidden_char_array PROTO((char *, char *));
+static void add_attribute PROTO((enum attrs, char *,
+ int, int, int));
+static void init_attributes PROTO((void));
+static void record_function_format PROTO((tree, tree, enum format_type,
+ int, int));
+static void record_international_format PROTO((tree, tree, int));
+
+/* Keep a stack of if statements. We record the number of compound
+ statements seen up to the if keyword, as well as the line number
+ and file of the if. If a potentially ambiguous else is seen, that
+ fact is recorded; the warning is issued when we can be sure that
+ the enclosing if statement does not have an else branch. */
+typedef struct
+{
+ int compstmt_count;
+ int line;
+ char *file;
+ int needs_warning;
+} if_elt;
+
+static if_elt *if_stack;
+
+/* Amount of space in the if statement stack. */
+static int if_stack_space = 0;
+
+/* Stack pointer. */
+static int if_stack_pointer = 0;
+
+/* Generate RTL for the start of an if-then, and record the start of it
+ for ambiguous else detection. */
+
+void
+c_expand_start_cond (cond, exitflag, compstmt_count)
+ tree cond;
+ int exitflag;
+ int compstmt_count;
+{
+ /* Make sure there is enough space on the stack. */
+ if (if_stack_space == 0)
+ {
+ if_stack_space = 10;
+ if_stack = (if_elt *)xmalloc (10 * sizeof (if_elt));
+ }
+ else if (if_stack_space == if_stack_pointer)
+ {
+ if_stack_space += 10;
+ if_stack = (if_elt *)xrealloc (if_stack, if_stack_space * sizeof (if_elt));
+ }
+
+ /* Record this if statement. */
+ if_stack[if_stack_pointer].compstmt_count = compstmt_count;
+ if_stack[if_stack_pointer].file = input_filename;
+ if_stack[if_stack_pointer].line = lineno;
+ if_stack[if_stack_pointer].needs_warning = 0;
+ if_stack_pointer++;
+
+ expand_start_cond (cond, exitflag);
+}
+
+/* Generate RTL for the end of an if-then. Optionally warn if a nested
+ if statement had an ambiguous else clause. */
+
+void
+c_expand_end_cond ()
+{
+ if_stack_pointer--;
+ if (if_stack[if_stack_pointer].needs_warning)
+ warning_with_file_and_line (if_stack[if_stack_pointer].file,
+ if_stack[if_stack_pointer].line,
+ "suggest explicit braces to avoid ambiguous `else'");
+ expand_end_cond ();
+}
+
+/* Generate RTL between the then-clause and the else-clause
+ of an if-then-else. */
+
+void
+c_expand_start_else ()
+{
+ /* An ambiguous else warning must be generated for the enclosing if
+ statement, unless we see an else branch for that one, too. */
+ if (warn_parentheses
+ && if_stack_pointer > 1
+ && (if_stack[if_stack_pointer - 1].compstmt_count
+ == if_stack[if_stack_pointer - 2].compstmt_count))
+ if_stack[if_stack_pointer - 2].needs_warning = 1;
+
+ /* Even if a nested if statement had an else branch, it can't be
+ ambiguous if this one also has an else. So don't warn in that
+ case. Also don't warn for any if statements nested in this else. */
+ if_stack[if_stack_pointer - 1].needs_warning = 0;
+ if_stack[if_stack_pointer - 1].compstmt_count--;
+
+ expand_start_else ();
+}
/* Make bindings for __FUNCTION__ and __PRETTY_FUNCTION__. */
}
else
{
- char *kind = "function";
- if (TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
- kind = "method";
/* Allow functions to be nameless (such as artificial ones). */
if (DECL_NAME (current_function_decl))
name = IDENTIFIER_POINTER (DECL_NAME (current_function_decl));
else
name = "";
- printable_name = (*decl_printable_name) (current_function_decl, &kind);
+ printable_name = (*decl_printable_name) (current_function_decl, 2);
}
declare_hidden_char_array ("__FUNCTION__", name);
int vlen;
/* If the default size of char arrays isn't big enough for the name,
- make a bigger one. */
+ or if we want to give warnings for large objects, make a bigger one. */
vlen = strlen (value) + 1;
type = char_array_type_node;
- if (TREE_INT_CST_LOW (TYPE_MAX_VALUE (TREE_TYPE (type))) < vlen)
+ if (TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) < vlen
+ || warn_larger_than)
type = build_array_type (char_type_node,
build_index_type (build_int_2 (vlen, 0)));
-
push_obstacks_nochange ();
decl = build_decl (VAR_DECL, get_identifier (name), type);
TREE_STATIC (decl) = 1;
TREE_READONLY (decl) = 1;
TREE_ASM_WRITTEN (decl) = 1;
DECL_SOURCE_LINE (decl) = 0;
+ DECL_ARTIFICIAL (decl) = 1;
DECL_IN_SYSTEM_HEADER (decl) = 1;
DECL_IGNORED_P (decl) = 1;
init = build_string (vlen, value);
{
int i;
for (i = 0; i < len; i++)
- ((int *) q)[i] = TREE_STRING_POINTER (t)[i];
+ {
+ if (WCHAR_TYPE_SIZE == HOST_BITS_PER_SHORT)
+ ((short *) q)[i] = TREE_STRING_POINTER (t)[i];
+ else
+ ((int *) q)[i] = TREE_STRING_POINTER (t)[i];
+ }
q += len * wchar_bytes;
}
}
wide_flag = 1;
}
- /* Compute the number of elements, for the array type. */
+ /* Compute the number of elements, for the array type. */
nchars = wide_flag ? length / wchar_bytes : length;
/* Create the array type for the string constant.
return value;
}
\f
-/* Process the attributes listed in ATTRIBUTES
- and install them in DECL. */
+/* To speed up processing of attributes, we maintain an array of
+ IDENTIFIER_NODES and the corresponding attribute types. */
+
+/* Array to hold attribute information. */
+
+static struct {enum attrs id; tree name; int min, max, decl_req;} attrtab[50];
+
+static int attrtab_idx = 0;
+
+/* Add an entry to the attribute table above. */
+
+static void
+add_attribute (id, string, min_len, max_len, decl_req)
+ enum attrs id;
+ char *string;
+ int min_len, max_len;
+ int decl_req;
+{
+ char buf[100];
+
+ attrtab[attrtab_idx].id = id;
+ attrtab[attrtab_idx].name = get_identifier (string);
+ attrtab[attrtab_idx].min = min_len;
+ attrtab[attrtab_idx].max = max_len;
+ attrtab[attrtab_idx++].decl_req = decl_req;
+
+ sprintf (buf, "__%s__", string);
+
+ attrtab[attrtab_idx].id = id;
+ attrtab[attrtab_idx].name = get_identifier (buf);
+ attrtab[attrtab_idx].min = min_len;
+ attrtab[attrtab_idx].max = max_len;
+ attrtab[attrtab_idx++].decl_req = decl_req;
+}
+
+/* Initialize attribute table. */
+
+static void
+init_attributes ()
+{
+ add_attribute (A_PACKED, "packed", 0, 0, 0);
+ add_attribute (A_NOCOMMON, "nocommon", 0, 0, 1);
+ add_attribute (A_COMMON, "common", 0, 0, 1);
+ add_attribute (A_NORETURN, "noreturn", 0, 0, 1);
+ add_attribute (A_NORETURN, "volatile", 0, 0, 1);
+ add_attribute (A_UNUSED, "unused", 0, 0, 0);
+ add_attribute (A_CONST, "const", 0, 0, 1);
+ add_attribute (A_T_UNION, "transparent_union", 0, 0, 0);
+ add_attribute (A_CONSTRUCTOR, "constructor", 0, 0, 1);
+ add_attribute (A_DESTRUCTOR, "destructor", 0, 0, 1);
+ add_attribute (A_MODE, "mode", 1, 1, 1);
+ add_attribute (A_SECTION, "section", 1, 1, 1);
+ add_attribute (A_ALIGNED, "aligned", 0, 1, 0);
+ add_attribute (A_FORMAT, "format", 3, 3, 1);
+ add_attribute (A_FORMAT_ARG, "format_arg", 1, 1, 1);
+ add_attribute (A_WEAK, "weak", 0, 0, 1);
+ add_attribute (A_ALIAS, "alias", 1, 1, 1);
+}
+\f
+/* Process the attributes listed in ATTRIBUTES and PREFIX_ATTRIBUTES
+ and install them in NODE, which is either a DECL (including a TYPE_DECL)
+ or a TYPE. PREFIX_ATTRIBUTES can appear after the declaration specifiers
+ and declaration modifiers but before the declaration proper. */
void
-decl_attributes (decl, attributes)
- tree decl, attributes;
+decl_attributes (node, attributes, prefix_attributes)
+ tree node, attributes, prefix_attributes;
{
+ tree decl = 0, type = 0;
+ int is_type = 0;
tree a;
+ if (attrtab_idx == 0)
+ init_attributes ();
+
+ if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd')
+ {
+ decl = node;
+ type = TREE_TYPE (decl);
+ is_type = TREE_CODE (node) == TYPE_DECL;
+ }
+ else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't')
+ type = node, is_type = 1;
+
+ attributes = chainon (prefix_attributes, attributes);
+
for (a = attributes; a; a = TREE_CHAIN (a))
- if (TREE_VALUE (a) == get_identifier ("packed"))
- {
- if (TREE_CODE (decl) == FIELD_DECL)
- DECL_PACKED (decl) = 1;
- /* We can't set DECL_PACKED for a VAR_DECL, because the bit is
- used for DECL_REGISTER. It wouldn't mean anything anyway. */
- else
- warning_with_decl (decl, "`packed' attribute ignore");
-
- }
- else if (TREE_VALUE (a) == get_identifier ("noreturn")
- || TREE_VALUE (a) == get_identifier ("volatile"))
- {
- tree type = TREE_TYPE (decl);
-
- if (TREE_CODE (decl) == FUNCTION_DECL)
- TREE_THIS_VOLATILE (decl) = 1;
- else if (TREE_CODE (type) == POINTER_TYPE
- && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
- TREE_TYPE (decl)
- = build_pointer_type
- (build_type_variant (TREE_TYPE (type),
- TREE_READONLY (TREE_TYPE (type)), 1));
- else
- warning_with_decl (decl, "`%s' attribute ignored",
- IDENTIFIER_POINTER (TREE_VALUE (a)));
- }
- else if (TREE_VALUE (a) == get_identifier ("const"))
- {
- tree type = TREE_TYPE (decl);
-
- if (TREE_CODE (decl) == FUNCTION_DECL)
- TREE_READONLY (decl) = 1;
- else if (TREE_CODE (type) == POINTER_TYPE
- && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
- TREE_TYPE (decl)
- = build_pointer_type
- (build_type_variant (TREE_TYPE (type), 1,
- TREE_THIS_VOLATILE (TREE_TYPE (type))));
- else
- warning_with_decl (decl, "`const' attribute ignored");
- }
- else if (TREE_VALUE (a) != 0
- && TREE_CODE (TREE_VALUE (a)) == TREE_LIST
- && TREE_PURPOSE (TREE_VALUE (a)) == get_identifier ("mode"))
- {
- int i;
- char *specified_name
- = IDENTIFIER_POINTER (TREE_VALUE (TREE_VALUE (a)));
-
- /* Give this decl a type with the specified mode. */
- for (i = 0; i < NUM_MACHINE_MODES; i++)
- if (!strcmp (specified_name, GET_MODE_NAME (i)))
+ {
+ tree name = TREE_PURPOSE (a);
+ tree args = TREE_VALUE (a);
+ int i;
+ enum attrs id;
+
+ for (i = 0; i < attrtab_idx; i++)
+ if (attrtab[i].name == name)
+ break;
+
+ if (i == attrtab_idx)
+ {
+ if (! valid_machine_attribute (name, args, decl, type))
+ warning ("`%s' attribute directive ignored",
+ IDENTIFIER_POINTER (name));
+ else if (decl != 0)
+ type = TREE_TYPE (decl);
+ continue;
+ }
+ else if (attrtab[i].decl_req && decl == 0)
+ {
+ warning ("`%s' attribute does not apply to types",
+ IDENTIFIER_POINTER (name));
+ continue;
+ }
+ else if (list_length (args) < attrtab[i].min
+ || list_length (args) > attrtab[i].max)
+ {
+ error ("wrong number of arguments specified for `%s' attribute",
+ IDENTIFIER_POINTER (name));
+ continue;
+ }
+
+ id = attrtab[i].id;
+ switch (id)
+ {
+ case A_PACKED:
+ if (is_type)
+ TYPE_PACKED (type) = 1;
+ else if (TREE_CODE (decl) == FIELD_DECL)
+ DECL_PACKED (decl) = 1;
+ /* We can't set DECL_PACKED for a VAR_DECL, because the bit is
+ used for DECL_REGISTER. It wouldn't mean anything anyway. */
+ else
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
+ case A_NOCOMMON:
+ if (TREE_CODE (decl) == VAR_DECL)
+ DECL_COMMON (decl) = 0;
+ else
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
+ case A_COMMON:
+ if (TREE_CODE (decl) == VAR_DECL)
+ DECL_COMMON (decl) = 1;
+ else
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
+ case A_NORETURN:
+ if (TREE_CODE (decl) == FUNCTION_DECL)
+ TREE_THIS_VOLATILE (decl) = 1;
+ else if (TREE_CODE (type) == POINTER_TYPE
+ && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
+ TREE_TYPE (decl) = type
+ = build_pointer_type
+ (build_type_variant (TREE_TYPE (type),
+ TREE_READONLY (TREE_TYPE (type)), 1));
+ else
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
+ case A_UNUSED:
+ if (is_type)
+ TREE_USED (type) = 1;
+ else if (TREE_CODE (decl) == PARM_DECL
+ || TREE_CODE (decl) == VAR_DECL
+ || TREE_CODE (decl) == FUNCTION_DECL)
+ TREE_USED (decl) = 1;
+ else
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
+ case A_CONST:
+ if (TREE_CODE (decl) == FUNCTION_DECL)
+ TREE_READONLY (decl) = 1;
+ else if (TREE_CODE (type) == POINTER_TYPE
+ && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
+ TREE_TYPE (decl) = type
+ = build_pointer_type
+ (build_type_variant (TREE_TYPE (type), 1,
+ TREE_THIS_VOLATILE (TREE_TYPE (type))));
+ else
+ warning ( "`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
+ case A_T_UNION:
+ if (is_type
+ && TREE_CODE (type) == UNION_TYPE
+ && (decl == 0
+ || (TYPE_FIELDS (type) != 0
+ && TYPE_MODE (type) == DECL_MODE (TYPE_FIELDS (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 ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
+ case A_CONSTRUCTOR:
+ 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 ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
+ case A_DESTRUCTOR:
+ if (TREE_CODE (decl) == FUNCTION_DECL
+ && TREE_CODE (type) == FUNCTION_TYPE
+ && decl_function_context (decl) == 0)
{
- tree type
- = type_for_mode (i, TREE_UNSIGNED (TREE_TYPE (decl)));
- if (type != 0)
+ DECL_STATIC_DESTRUCTOR (decl) = 1;
+ TREE_USED (decl) = 1;
+ }
+ else
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
+ case A_MODE:
+ if (TREE_CODE (TREE_VALUE (args)) != IDENTIFIER_NODE)
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ else
+ {
+ int j;
+ char *p = IDENTIFIER_POINTER (TREE_VALUE (args));
+ int len = strlen (p);
+ enum machine_mode mode = VOIDmode;
+ tree typefm;
+
+ 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;
+ }
+
+ /* Give this decl a type with the specified mode.
+ First check for the special modes. */
+ 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);
+ else if (0 == (typefm = type_for_mode (mode,
+ TREE_UNSIGNED (type))))
+ error ("no data type for mode `%s'", p);
+ else
{
- TREE_TYPE (decl) = type;
+ TREE_TYPE (decl) = type = typefm;
DECL_SIZE (decl) = 0;
layout_decl (decl, 0);
}
- else
- error ("no data type for mode `%s'", specified_name);
- break;
}
- if (i == NUM_MACHINE_MODES)
- error_with_decl (decl, "unknown machine mode `%s'", specified_name);
- }
- else if (TREE_VALUE (a) != 0
- && TREE_CODE (TREE_VALUE (a)) == TREE_LIST
- && TREE_PURPOSE (TREE_VALUE (a)) == get_identifier ("section"))
- {
+ break;
+
+ case A_SECTION:
#ifdef ASM_OUTPUT_SECTION_NAME
- if (TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
- {
- if (TREE_CODE (decl) == VAR_DECL && current_function_decl != NULL_TREE)
- error_with_decl (decl,
- "section attribute cannot be specified for local variables");
- /* The decl may have already been given a section attribute from
- a previous declaration. Ensure they match. */
- else if (DECL_SECTION_NAME (decl) != NULL_TREE
- && strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)),
- TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (a)))) != 0)
- error_with_decl (decl,
- "section of `%s' conflicts with previous declaration");
- else
- DECL_SECTION_NAME (decl) = TREE_VALUE (TREE_VALUE (a));
- }
- else
- error_with_decl (decl,
+ 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_with_decl (decl,
+ "section attribute cannot be specified for local variables");
+ /* The decl may have already been given a section attribute from
+ a previous declaration. Ensure they match. */
+ else if (DECL_SECTION_NAME (decl) != NULL_TREE
+ && strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)),
+ TREE_STRING_POINTER (TREE_VALUE (args))) != 0)
+ error_with_decl (node,
+ "section of `%s' conflicts with previous declaration");
+ else
+ DECL_SECTION_NAME (decl) = TREE_VALUE (args);
+ }
+ else
+ error_with_decl (node,
"section attribute not allowed for `%s'");
#else
- error_with_decl (decl, "section attributes are not supported for this target");
+ error_with_decl (node,
+ "section attributes are not supported for this target");
#endif
- }
- else if (TREE_VALUE (a) != 0
- && TREE_CODE (TREE_VALUE (a)) == TREE_LIST
- && TREE_PURPOSE (TREE_VALUE (a)) == get_identifier ("aligned"))
- {
- tree align_expr = TREE_VALUE (TREE_VALUE (a));
- int align;
-
- /* Strip any NOPs of any kind. */
- 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_with_decl (decl,
- "requested alignment of `%s' is not a constant");
- continue;
- }
+ break;
- align = TREE_INT_CST_LOW (align_expr) * BITS_PER_UNIT;
-
- if (exact_log2 (align) == -1)
- error_with_decl (decl,
- "requested alignment of `%s' is not a power of 2");
- else if (TREE_CODE (decl) != VAR_DECL
- && TREE_CODE (decl) != FIELD_DECL)
- error_with_decl (decl,
- "alignment specified for `%s'");
- else
- DECL_ALIGN (decl) = align;
- }
- else if (TREE_VALUE (a) != 0
- && TREE_CODE (TREE_VALUE (a)) == TREE_LIST
- && TREE_PURPOSE (TREE_VALUE (a)) == get_identifier ("format"))
- {
- tree list = TREE_VALUE (TREE_VALUE (a));
- tree format_type = TREE_PURPOSE (list);
- tree format_num_expr = TREE_PURPOSE (TREE_VALUE (list));
- tree first_arg_num_expr = TREE_VALUE (TREE_VALUE (list));
- int format_num;
- int first_arg_num;
- int is_scan;
- tree argument;
- int arg_num;
-
- if (TREE_CODE (decl) != FUNCTION_DECL)
+ case A_ALIGNED:
{
- error_with_decl (decl,
- "argument format specified for non-function `%s'");
- continue;
+ tree align_expr
+ = (args ? TREE_VALUE (args)
+ : size_int (BIGGEST_ALIGNMENT / BITS_PER_UNIT));
+ int align;
+
+ /* Strip any NOPs of any kind. */
+ 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");
+ continue;
+ }
+
+ align = TREE_INT_CST_LOW (align_expr) * BITS_PER_UNIT;
+
+ if (exact_log2 (align) == -1)
+ error ("requested alignment is not a power of 2");
+ else if (is_type)
+ TYPE_ALIGN (type) = align;
+ else if (TREE_CODE (decl) != VAR_DECL
+ && TREE_CODE (decl) != FIELD_DECL)
+ error_with_decl (decl,
+ "alignment may not be specified for `%s'");
+ else
+ DECL_ALIGN (decl) = align;
}
-
- if (format_type == get_identifier ("printf"))
- is_scan = 0;
- else if (format_type == get_identifier ("scanf"))
- is_scan = 1;
- else
+ break;
+
+ case A_FORMAT:
{
- error_with_decl (decl, "unrecognized format specifier for `%s'");
- continue;
- }
+ tree format_type_id = TREE_VALUE (args);
+ tree format_num_expr = TREE_VALUE (TREE_CHAIN (args));
+ tree first_arg_num_expr
+ = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (args)));
+ int format_num;
+ int first_arg_num;
+ enum format_type format_type;
+ tree argument;
+ int arg_num;
+
+ if (TREE_CODE (decl) != FUNCTION_DECL)
+ {
+ error_with_decl (decl,
+ "argument format specified for non-function `%s'");
+ continue;
+ }
- /* Strip any conversions from the string index and first arg number
- and verify they are constants. */
- 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);
-
- while (TREE_CODE (first_arg_num_expr) == NOP_EXPR
- || TREE_CODE (first_arg_num_expr) == CONVERT_EXPR
- || TREE_CODE (first_arg_num_expr) == NON_LVALUE_EXPR)
- first_arg_num_expr = TREE_OPERAND (first_arg_num_expr, 0);
-
- if (TREE_CODE (format_num_expr) != INTEGER_CST
- || TREE_CODE (first_arg_num_expr) != INTEGER_CST)
- {
- error_with_decl (decl,
- "format string for `%s' has non-constant operand number");
- continue;
- }
+ if (TREE_CODE (format_type_id) != IDENTIFIER_NODE)
+ {
+ error ("unrecognized format specifier");
+ continue;
+ }
+ else
+ {
+ char *p = IDENTIFIER_POINTER (format_type_id);
+
+ if (!strcmp (p, "printf") || !strcmp (p, "__printf__"))
+ format_type = printf_format_type;
+ else if (!strcmp (p, "scanf") || !strcmp (p, "__scanf__"))
+ format_type = scanf_format_type;
+ else if (!strcmp (p, "strftime")
+ || !strcmp (p, "__strftime__"))
+ format_type = strftime_format_type;
+ else
+ {
+ error ("`%s' is an unrecognized format function type", p);
+ continue;
+ }
+ }
- format_num = TREE_INT_CST_LOW (format_num_expr);
- first_arg_num = TREE_INT_CST_LOW (first_arg_num_expr);
- if (first_arg_num != 0 && first_arg_num <= format_num)
- {
- error_with_decl (decl,
- "format string arg follows the args to be formatted, for `%s'");
- continue;
+ /* Strip any conversions from the string index and first arg number
+ and verify they are constants. */
+ 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);
+
+ while (TREE_CODE (first_arg_num_expr) == NOP_EXPR
+ || TREE_CODE (first_arg_num_expr) == CONVERT_EXPR
+ || TREE_CODE (first_arg_num_expr) == NON_LVALUE_EXPR)
+ first_arg_num_expr = TREE_OPERAND (first_arg_num_expr, 0);
+
+ if (TREE_CODE (format_num_expr) != INTEGER_CST
+ || TREE_CODE (first_arg_num_expr) != INTEGER_CST)
+ {
+ error ("format string has non-constant operand number");
+ continue;
+ }
+
+ format_num = TREE_INT_CST_LOW (format_num_expr);
+ first_arg_num = TREE_INT_CST_LOW (first_arg_num_expr);
+ if (first_arg_num != 0 && first_arg_num <= format_num)
+ {
+ error ("format string arg follows the args to be formatted");
+ continue;
+ }
+
+ /* If a parameter list is specified, verify that the format_num
+ argument is actually a string, in case the format attribute
+ is in error. */
+ argument = TYPE_ARG_TYPES (type);
+ if (argument)
+ {
+ for (arg_num = 1; ; ++arg_num)
+ {
+ if (argument == 0 || arg_num == format_num)
+ break;
+ argument = TREE_CHAIN (argument);
+ }
+ if (! argument
+ || TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE
+ || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (argument)))
+ != char_type_node))
+ {
+ error ("format string arg not a string type");
+ continue;
+ }
+ if (first_arg_num != 0)
+ {
+ /* Verify that first_arg_num points to the last arg,
+ the ... */
+ while (argument)
+ arg_num++, argument = TREE_CHAIN (argument);
+ if (arg_num != first_arg_num)
+ {
+ error ("args to be formatted is not ...");
+ continue;
+ }
+ }
+ }
+
+ record_function_format (DECL_NAME (decl),
+ DECL_ASSEMBLER_NAME (decl),
+ format_type, format_num, first_arg_num);
+ break;
}
- /* If a parameter list is specified, verify that the format_num
- argument is actually a string, in case the format attribute
- is in error. */
- argument = TYPE_ARG_TYPES (TREE_TYPE (decl));
- if (argument)
+ case A_FORMAT_ARG:
{
- for (arg_num = 1; ; ++arg_num)
+ tree format_num_expr = TREE_VALUE (args);
+ int format_num, arg_num;
+ tree argument;
+
+ if (TREE_CODE (decl) != FUNCTION_DECL)
{
- if (argument == 0 || arg_num == format_num)
- break;
- argument = TREE_CHAIN (argument);
+ error_with_decl (decl,
+ "argument format specified for non-function `%s'");
+ continue;
}
- if (! argument
- || TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE
- || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (argument)))
- != char_type_node))
+
+ /* Strip any conversions from the first arg number and verify it
+ is a constant. */
+ 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);
+
+ if (TREE_CODE (format_num_expr) != INTEGER_CST)
{
- error_with_decl (decl,
- "format string arg not a string type, for `%s'");
+ error ("format string has non-constant operand number");
continue;
}
- if (first_arg_num != 0)
+
+ format_num = TREE_INT_CST_LOW (format_num_expr);
+
+ /* If a parameter list is specified, verify that the format_num
+ argument is actually a string, in case the format attribute
+ is in error. */
+ argument = TYPE_ARG_TYPES (type);
+ if (argument)
{
- /* Verify that first_arg_num points to the last arg, the ... */
- while (argument)
- arg_num++, argument = TREE_CHAIN (argument);
- if (arg_num != first_arg_num)
+ for (arg_num = 1; ; ++arg_num)
+ {
+ if (argument == 0 || arg_num == format_num)
+ break;
+ argument = TREE_CHAIN (argument);
+ }
+ if (! argument
+ || TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE
+ || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (argument)))
+ != char_type_node))
{
- error_with_decl (decl,
- "args to be formatted is not ..., for `%s'");
+ error ("format string arg not a string type");
continue;
}
}
+
+ if (TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) != POINTER_TYPE
+ || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (TREE_TYPE (decl))))
+ != char_type_node))
+ {
+ error ("function does not return string type");
+ continue;
+ }
+
+ record_international_format (DECL_NAME (decl),
+ DECL_ASSEMBLER_NAME (decl),
+ format_num);
+ break;
}
- record_function_format (DECL_NAME (decl), DECL_ASSEMBLER_NAME (decl),
- is_scan, format_num, first_arg_num);
- }
+ case A_WEAK:
+ declare_weak (decl);
+ break;
+
+ case A_ALIAS:
+ if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl))
+ || (TREE_CODE (decl) != FUNCTION_DECL && ! DECL_EXTERNAL (decl)))
+ error_with_decl (decl,
+ "`%s' defined both normally and as an alias");
+ else if (decl_function_context (decl) == 0)
+ {
+ tree id = get_identifier (TREE_STRING_POINTER
+ (TREE_VALUE (args)));
+ if (TREE_CODE (decl) == FUNCTION_DECL)
+ DECL_INITIAL (decl) = error_mark_node;
+ else
+ DECL_EXTERNAL (decl) = 0;
+ assemble_alias (decl, id);
+ }
+ else
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+ }
+ }
+}
+
+/* Split SPECS_ATTRS, a list of declspecs and prefix attributes, into two
+ lists. SPECS_ATTRS may also be just a typespec (eg: RECORD_TYPE).
+
+ The head of the declspec list is stored in DECLSPECS.
+ The head of the attribute list is stored in PREFIX_ATTRIBUTES.
+
+ Note that attributes in SPECS_ATTRS are stored in the TREE_PURPOSE of
+ the list elements. We drop the containing TREE_LIST nodes and link the
+ resulting attributes together the way decl_attributes expects them. */
+
+void
+split_specs_attrs (specs_attrs, declspecs, prefix_attributes)
+ tree specs_attrs;
+ tree *declspecs, *prefix_attributes;
+{
+ tree t, s, a, next, specs, attrs;
+
+ /* This can happen in c++ (eg: decl: typespec initdecls ';'). */
+ if (specs_attrs != NULL_TREE
+ && TREE_CODE (specs_attrs) != TREE_LIST)
+ {
+ *declspecs = specs_attrs;
+ *prefix_attributes = NULL_TREE;
+ return;
+ }
+
+ /* Remember to keep the lists in the same order, element-wise. */
+
+ specs = s = NULL_TREE;
+ attrs = a = NULL_TREE;
+ for (t = specs_attrs; t; t = next)
+ {
+ next = TREE_CHAIN (t);
+ /* Declspecs have a non-NULL TREE_VALUE. */
+ if (TREE_VALUE (t) != NULL_TREE)
+ {
+ if (specs == NULL_TREE)
+ specs = s = t;
+ else
+ {
+ TREE_CHAIN (s) = t;
+ s = t;
+ }
+ }
+ else
+ {
+ if (attrs == NULL_TREE)
+ attrs = a = TREE_PURPOSE (t);
+ else
+ {
+ TREE_CHAIN (a) = TREE_PURPOSE (t);
+ a = TREE_PURPOSE (t);
+ }
+ /* More attrs can be linked here, move A to the end. */
+ while (TREE_CHAIN (a) != NULL_TREE)
+ a = TREE_CHAIN (a);
+ }
+ }
+
+ /* Terminate the lists. */
+ if (s != NULL_TREE)
+ TREE_CHAIN (s) = NULL_TREE;
+ if (a != NULL_TREE)
+ TREE_CHAIN (a) = NULL_TREE;
+
+ /* All done. */
+ *declspecs = specs;
+ *prefix_attributes = attrs;
+}
+
+/* Strip attributes from SPECS_ATTRS, a list of declspecs and attributes.
+ This function is used by the parser when a rule will accept attributes
+ in a particular position, but we don't want to support that just yet.
+
+ A warning is issued for every ignored attribute. */
+
+tree
+strip_attrs (specs_attrs)
+ tree specs_attrs;
+{
+ tree specs, attrs;
+
+ split_specs_attrs (specs_attrs, &specs, &attrs);
+
+ while (attrs)
+ {
+ warning ("`%s' attribute ignored",
+ IDENTIFIER_POINTER (TREE_PURPOSE (attrs)));
+ attrs = TREE_CHAIN (attrs);
+ }
+
+ return specs;
}
\f
/* Check a printf/fprintf/sprintf/scanf/fscanf/sscanf format against
#define T_I &integer_type_node
#define T_L &long_integer_type_node
+#define T_LL &long_long_integer_type_node
#define T_S &short_integer_type_node
#define T_UI &unsigned_type_node
#define T_UL &long_unsigned_type_node
+#define T_ULL &long_long_unsigned_type_node
#define T_US &short_unsigned_type_node
#define T_F &float_type_node
#define T_D &double_type_node
#define T_LD &long_double_type_node
#define T_C &char_type_node
+#define T_UC &unsigned_char_type_node
#define T_V &void_type_node
#define T_W &wchar_type_node
#define T_ST &sizetype
int pointer_count;
/* Type of argument if no length modifier is used. */
tree *nolen;
+ /* Type of argument if length modifier for shortening to byte is used.
+ If NULL, then this modifier is not allowed. */
+ tree *hhlen;
/* Type of argument if length modifier for shortening is used.
If NULL, then this modifier is not allowed. */
tree *hlen;
/* Type of argument if length modifier `l' is used.
If NULL, then this modifier is not allowed. */
tree *llen;
+ /* Type of argument if length modifier `q' or `ll' is used.
+ If NULL, then this modifier is not allowed. */
+ tree *qlen;
/* Type of argument if length modifier `L' is used.
If NULL, then this modifier is not allowed. */
tree *bigllen;
+ /* Type of argument if length modifier `Z' is used.
+ If NULL, then this modifier is not allowed. */
+ tree *zlen;
/* List of other modifier characters allowed with these options. */
char *flag_chars;
} format_char_info;
static format_char_info print_char_table[] = {
- { "di", 0, T_I, T_I, T_L, NULL, "-wp0 +" },
- { "oxX", 0, T_UI, T_UI, T_UL, NULL, "-wp0#" },
- { "u", 0, T_UI, T_UI, T_UL, NULL, "-wp0" },
-/* Two GNU extensions. */
- { "Z", 0, T_ST, NULL, NULL, NULL, "-wp0" },
- { "m", 0, T_UI, T_UI, T_UL, NULL, "-wp" },
- { "feEgG", 0, T_D, NULL, NULL, T_LD, "-wp0 +#" },
- { "c", 0, T_I, NULL, T_W, NULL, "-w" },
- { "C", 0, T_W, NULL, NULL, NULL, "-w" },
- { "s", 1, T_C, NULL, T_W, NULL, "-wp" },
- { "S", 1, T_W, NULL, NULL, NULL, "-wp" },
- { "p", 1, T_V, NULL, NULL, NULL, "-w" },
- { "n", 1, T_I, T_S, T_L, NULL, "" },
+ { "di", 0, T_I, T_I, T_I, T_L, T_LL, T_LL, T_ST, "-wp0 +" },
+ { "oxX", 0, T_UI, T_UI, T_UI, T_UL, T_ULL, T_ULL, T_ST, "-wp0#" },
+ { "u", 0, T_UI, T_UI, T_UI, T_UL, T_ULL, T_ULL, T_ST, "-wp0" },
+/* A GNU extension. */
+ { "m", 0, T_V, NULL, NULL, NULL, NULL, NULL, NULL, "-wp" },
+ { "feEgGaA", 0, T_D, NULL, NULL, NULL, NULL, T_LD, NULL, "-wp0 +#" },
+ { "c", 0, T_I, NULL, NULL, T_W, NULL, NULL, NULL, "-w" },
+ { "C", 0, T_W, NULL, NULL, NULL, NULL, NULL, NULL, "-w" },
+ { "s", 1, T_C, NULL, NULL, T_W, NULL, NULL, NULL, "-wp" },
+ { "S", 1, T_W, NULL, NULL, NULL, NULL, NULL, NULL, "-wp" },
+ { "p", 1, T_V, NULL, NULL, NULL, NULL, NULL, NULL, "-w" },
+ { "n", 1, T_I, NULL, T_S, T_L, T_LL, NULL, NULL, "" },
{ NULL }
};
static format_char_info scan_char_table[] = {
- { "di", 1, T_I, T_S, T_L, NULL, "*" },
- { "ouxX", 1, T_UI, T_US, T_UL, NULL, "*" },
- { "efgEG", 1, T_F, NULL, T_D, T_LD, "*" },
- { "sc", 1, T_C, NULL, T_W, NULL, "*a" },
- { "[", 1, T_C, NULL, NULL, NULL, "*a" },
- { "C", 1, T_W, NULL, NULL, NULL, "*" },
- { "S", 1, T_W, NULL, NULL, NULL, "*" },
- { "p", 2, T_V, NULL, NULL, NULL, "*" },
- { "n", 1, T_I, T_S, T_L, NULL, "" },
+ { "di", 1, T_I, T_C, T_S, T_L, T_LL, T_LL, NULL, "*" },
+ { "ouxX", 1, T_UI, T_UC, T_US, T_UL, T_ULL, T_ULL, NULL, "*" },
+ { "efgEGaA", 1, T_F, NULL, NULL, T_D, NULL, T_LD, NULL, "*" },
+ { "c", 1, T_C, NULL, NULL, T_W, NULL, NULL, NULL, "*" },
+ { "s", 1, T_C, NULL, NULL, T_W, NULL, NULL, NULL, "*a" },
+ { "[", 1, T_C, NULL, NULL, NULL, NULL, NULL, NULL, "*a" },
+ { "C", 1, T_W, NULL, NULL, NULL, NULL, NULL, NULL, "*" },
+ { "S", 1, T_W, NULL, NULL, NULL, NULL, NULL, NULL, "*a" },
+ { "p", 2, T_V, NULL, NULL, NULL, NULL, NULL, NULL, "*" },
+ { "n", 1, T_I, T_C, T_S, T_L, T_LL, NULL, NULL, "" },
+ { NULL }
+};
+
+/* Handle format characters recognized by glibc's strftime.c.
+ '2' - MUST do years as only two digits
+ '3' - MAY do years as only two digits (depending on locale)
+ 'E' - E modifier is acceptable
+ 'O' - O modifier is acceptable to Standard C
+ 'o' - O modifier is acceptable as a GNU extension
+ 'G' - other GNU extensions */
+
+static format_char_info time_char_table[] = {
+ { "y", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "2EO-_0w" },
+ { "D", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "2" },
+ { "g", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "2O-_0w" },
+ { "cx", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "3E" },
+ { "%RTXnrt", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "" },
+ { "P", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "G" },
+ { "HIMSUWdemw", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "-_0Ow" },
+ { "Vju", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "-_0Oow" },
+ { "Gklsz", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "-_0OGw" },
+ { "ABZa", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "^#" },
+ { "p", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "#" },
+ { "bh", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "^" },
+ { "CY", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "-_0EOw" },
{ NULL }
};
-typedef struct function_format_info {
+typedef struct function_format_info
+{
struct function_format_info *next; /* next structure on the list */
tree name; /* identifier such as "printf" */
tree assembler_name; /* optional mangled identifier (for C++) */
- int is_scan; /* TRUE if *scanf */
+ enum format_type format_type; /* type of format (printf, scanf, etc.) */
int format_num; /* number of format argument */
int first_arg_num; /* number of first arg (zero for varargs) */
} function_format_info;
static function_format_info *function_format_list = NULL;
-static void check_format_info PROTO((function_format_info *, tree));
+typedef struct international_format_info
+{
+ struct international_format_info *next; /* next structure on the list */
+ tree name; /* identifier such as "gettext" */
+ tree assembler_name; /* optional mangled identifier (for C++) */
+ int format_num; /* number of format argument */
+} international_format_info;
+
+static international_format_info *international_format_list = NULL;
+
+static void check_format_info PROTO((function_format_info *, tree));
/* Initialize the table of functions to perform format checking on.
The ANSI functions are always checked (whether <stdio.h> is
included or not), since it is common to call printf without
including <stdio.h>. There shouldn't be a problem with this,
since ANSI reserves these function names whether you include the
- header file or not. In any case, the checking is harmless. */
+ header file or not. In any case, the checking is harmless.
+
+ Also initialize the name of function that modify the format string for
+ internationalization purposes. */
void
init_function_format_info ()
{
- record_function_format (get_identifier ("printf"), NULL_TREE, 0, 1, 2);
- record_function_format (get_identifier ("fprintf"), NULL_TREE, 0, 2, 3);
- record_function_format (get_identifier ("sprintf"), NULL_TREE, 0, 2, 3);
- record_function_format (get_identifier ("scanf"), NULL_TREE, 1, 1, 2);
- record_function_format (get_identifier ("fscanf"), NULL_TREE, 1, 2, 3);
- record_function_format (get_identifier ("sscanf"), NULL_TREE, 1, 2, 3);
- record_function_format (get_identifier ("vprintf"), NULL_TREE, 0, 1, 0);
- record_function_format (get_identifier ("vfprintf"), NULL_TREE, 0, 2, 0);
- record_function_format (get_identifier ("vsprintf"), NULL_TREE, 0, 2, 0);
+ record_function_format (get_identifier ("printf"), NULL_TREE,
+ printf_format_type, 1, 2);
+ record_function_format (get_identifier ("fprintf"), NULL_TREE,
+ printf_format_type, 2, 3);
+ record_function_format (get_identifier ("sprintf"), NULL_TREE,
+ printf_format_type, 2, 3);
+ record_function_format (get_identifier ("scanf"), NULL_TREE,
+ scanf_format_type, 1, 2);
+ record_function_format (get_identifier ("fscanf"), NULL_TREE,
+ scanf_format_type, 2, 3);
+ record_function_format (get_identifier ("sscanf"), NULL_TREE,
+ scanf_format_type, 2, 3);
+ record_function_format (get_identifier ("vprintf"), NULL_TREE,
+ printf_format_type, 1, 0);
+ record_function_format (get_identifier ("vfprintf"), NULL_TREE,
+ printf_format_type, 2, 0);
+ record_function_format (get_identifier ("vsprintf"), NULL_TREE,
+ printf_format_type, 2, 0);
+ record_function_format (get_identifier ("strftime"), NULL_TREE,
+ strftime_format_type, 3, 0);
+
+ record_international_format (get_identifier ("gettext"), NULL_TREE, 1);
+ record_international_format (get_identifier ("dgettext"), NULL_TREE, 2);
+ record_international_format (get_identifier ("dcgettext"), NULL_TREE, 2);
}
/* Record information for argument format checking. FUNCTION_IDENT is
the identifier node for the name of the function to check (its decl
- need not exist yet). IS_SCAN is true for scanf-type format checking;
- false indicates printf-style format checking. FORMAT_NUM is the number
+ need not exist yet).
+ FORMAT_TYPE specifies the type of format checking. FORMAT_NUM is the number
of the argument which is the format control string (starting from 1).
FIRST_ARG_NUM is the number of the first actual argument to check
- against teh format string, or zero if no checking is not be done
+ against the format string, or zero if no checking is not be done
(e.g. for varargs such as vfprintf). */
-void
-record_function_format (name, assembler_name, is_scan,
+static void
+record_function_format (name, assembler_name, format_type,
format_num, first_arg_num)
tree name;
tree assembler_name;
- int is_scan;
+ enum format_type format_type;
int format_num;
int first_arg_num;
{
info->assembler_name = assembler_name;
}
- info->is_scan = is_scan;
+ info->format_type = format_type;
info->format_num = format_num;
info->first_arg_num = first_arg_num;
}
+/* Record information for the names of function that modify the format
+ argument to format functions. FUNCTION_IDENT is the identifier node for
+ the name of the function (its decl need not exist yet) and FORMAT_NUM is
+ the number of the argument which is the format control string (starting
+ from 1). */
+
+static void
+record_international_format (name, assembler_name, format_num)
+ tree name;
+ tree assembler_name;
+ int format_num;
+{
+ international_format_info *info;
+
+ /* Re-use existing structure if it's there. */
+
+ for (info = international_format_list; info; info = info->next)
+ {
+ if (info->name == name && info->assembler_name == assembler_name)
+ break;
+ }
+
+ if (! info)
+ {
+ info
+ = (international_format_info *)
+ xmalloc (sizeof (international_format_info));
+ info->next = international_format_list;
+ international_format_list = info;
+
+ info->name = name;
+ info->assembler_name = assembler_name;
+ }
+
+ info->format_num = format_num;
+}
+
static char tfaff[] = "too few arguments for format";
\f
/* Check the argument list of a call to printf, scanf, etc.
tree first_fillin_param;
char *format_chars;
format_char_info *fci;
- static char message[132];
char flag_chars[8];
int has_operand_number = 0;
params = TREE_CHAIN (params);
if (format_tree == 0)
return;
+
/* We can only check the format if it's a string constant. */
while (TREE_CODE (format_tree) == NOP_EXPR)
format_tree = TREE_OPERAND (format_tree, 0); /* strip coercion */
- if (format_tree == null_pointer_node)
+
+ if (TREE_CODE (format_tree) == CALL_EXPR
+ && TREE_CODE (TREE_OPERAND (format_tree, 0)) == ADDR_EXPR
+ && (TREE_CODE (TREE_OPERAND (TREE_OPERAND (format_tree, 0), 0))
+ == FUNCTION_DECL))
+ {
+ tree function = TREE_OPERAND (TREE_OPERAND (format_tree, 0), 0);
+
+ /* See if this is a call to a known internationalization function
+ that modifies the format arg. */
+ international_format_info *info;
+
+ for (info = international_format_list; info; info = info->next)
+ if (info->assembler_name
+ ? (info->assembler_name == DECL_ASSEMBLER_NAME (function))
+ : (info->name == DECL_NAME (function)))
+ {
+ tree inner_args;
+ int i;
+
+ for (inner_args = TREE_OPERAND (format_tree, 1), i = 1;
+ inner_args != 0;
+ inner_args = TREE_CHAIN (inner_args), i++)
+ if (i == info->format_num)
+ {
+ format_tree = TREE_VALUE (inner_args);
+
+ while (TREE_CODE (format_tree) == NOP_EXPR)
+ format_tree = TREE_OPERAND (format_tree, 0);
+ }
+ }
+ }
+
+ if (integer_zerop (format_tree))
{
warning ("null format string");
return;
}
flag_chars[0] = 0;
suppressed = wide = precise = FALSE;
- if (info->is_scan)
+ if (info->format_type == scanf_format_type)
{
suppressed = *format_chars == '*';
if (suppressed)
++format_chars;
- while (isdigit (*format_chars))
+ while (ISDIGIT (*format_chars))
++format_chars;
}
- else
+ else if (info->format_type == strftime_format_type)
+ {
+ while (*format_chars != 0 && index ("_-0^#", *format_chars) != 0)
+ {
+ if (pedantic)
+ warning ("ANSI C does not support the strftime `%c' flag",
+ *format_chars);
+ if (index (flag_chars, *format_chars) != 0)
+ {
+ warning ("repeated `%c' flag in format",
+ *format_chars);
+ ++format_chars;
+ }
+ else
+ {
+ i = strlen (flag_chars);
+ flag_chars[i++] = *format_chars++;
+ flag_chars[i] = 0;
+ }
+ }
+ while (ISDIGIT ((unsigned char) *format_chars))
+ {
+ wide = TRUE;
+ ++format_chars;
+ }
+ if (wide && pedantic)
+ warning ("ANSI C does not support strftime format width");
+ if (*format_chars == 'E' || *format_chars == 'O')
+ {
+ i = strlen (flag_chars);
+ flag_chars[i++] = *format_chars++;
+ flag_chars[i] = 0;
+ if (*format_chars == 'E' || *format_chars == 'O')
+ {
+ warning ("multiple E/O modifiers in format");
+ while (*format_chars == 'E' || *format_chars == 'O')
+ ++format_chars;
+ }
+ }
+ }
+ else if (info->format_type == printf_format_type)
{
/* See if we have a number followed by a dollar sign. If we do,
it is an operand number, so set PARAMS to that operand. */
while (*format_chars != 0 && index (" +#0-", *format_chars) != 0)
{
if (index (flag_chars, *format_chars) != 0)
+ warning ("repeated `%c' flag in format", *format_chars++);
+ else
{
- sprintf (message, "repeated `%c' flag in format",
- *format_chars);
- warning (message);
+ i = strlen (flag_chars);
+ flag_chars[i++] = *format_chars++;
+ flag_chars[i] = 0;
}
- i = strlen (flag_chars);
- flag_chars[i++] = *format_chars++;
- flag_chars[i] = 0;
}
- /* "If the space and + flags both appear,
+ /* "If the space and + flags both appear,
the space flag will be ignored." */
if (index (flag_chars, ' ') != 0
&& index (flag_chars, '+') != 0)
&&
(TYPE_MAIN_VARIANT (TREE_TYPE (cur_param))
!= unsigned_type_node))
- {
- sprintf (message,
- "field width is not type int (arg %d)",
- arg_num);
- warning (message);
- }
+ warning ("field width is not type int (arg %d)", arg_num);
}
}
else
{
- while (isdigit (*format_chars))
+ while (ISDIGIT (*format_chars))
{
wide = TRUE;
++format_chars;
{
precise = TRUE;
++format_chars;
- if (*format_chars != '*' && !isdigit (*format_chars))
+ if (*format_chars != '*' && !ISDIGIT (*format_chars))
warning ("`.' not followed by `*' or digit in format");
/* "...a...precision...may be indicated by an asterisk.
In this case, an int argument supplies the...precision." */
++arg_num;
if (TYPE_MAIN_VARIANT (TREE_TYPE (cur_param))
!= integer_type_node)
- {
- sprintf (message,
- "field width is not type int (arg %d)",
- arg_num);
- warning (message);
- }
+ warning ("field width is not type int (arg %d)",
+ arg_num);
}
}
else
{
- while (isdigit (*format_chars))
+ while (ISDIGIT (*format_chars))
++format_chars;
}
}
}
- if (*format_chars == 'h' || *format_chars == 'l' || *format_chars == 'L')
- length_char = *format_chars++;
- else
- length_char = 0;
+
aflag = 0;
- if (*format_chars == 'a')
- {
- aflag = 1;
- format_chars++;
- }
- if (suppressed && length_char != 0)
+
+ if (info->format_type != strftime_format_type)
{
- sprintf (message,
- "use of `*' and `%c' together in format",
- length_char);
- warning (message);
+ if (*format_chars == 'h' || *format_chars == 'l')
+ length_char = *format_chars++;
+ else if (*format_chars == 'q' || *format_chars == 'L')
+ {
+ length_char = *format_chars++;
+ if (pedantic)
+ warning ("ANSI C does not support the `%c' length modifier",
+ length_char);
+ }
+ else if (*format_chars == 'Z')
+ {
+ length_char = *format_chars++;
+ if (pedantic)
+ warning ("ANSI C does not support the `Z' length modifier");
+ }
+ else
+ length_char = 0;
+ if (length_char == 'l' && *format_chars == 'l')
+ {
+ length_char = 'q', format_chars++;
+ /* FIXME: Is allowed in ISO C 9x. */
+ if (pedantic)
+ warning ("ANSI C does not support the `ll' length modifier");
+ }
+ else if (length_char == 'h' && *format_chars == 'h')
+ {
+ length_char = 'H', format_chars++;
+ /* FIXME: Is allowed in ISO C 9x. */
+ if (pedantic)
+ warning ("ANSI C does not support the `hh' length modifier");
+ }
+ if (*format_chars == 'a' && info->format_type == scanf_format_type)
+ {
+ if (format_chars[1] == 's' || format_chars[1] == 'S'
+ || format_chars[1] == '[')
+ {
+ /* `a' is used as a flag. */
+ aflag = 1;
+ format_chars++;
+ }
+ }
+ if (suppressed && length_char != 0)
+ warning ("use of `*' and `%c' together in format", length_char);
}
format_char = *format_chars;
- if (format_char == 0)
+ if (format_char == 0
+ || (info->format_type != strftime_format_type && format_char == '%'))
{
warning ("conversion lacks type at end of format");
continue;
}
+ /* The m, C, and S formats are GNU extensions. */
+ if (pedantic && info->format_type != strftime_format_type
+ && (format_char == 'm' || format_char == 'C' || format_char == 'S'))
+ warning ("ANSI C does not support the `%c' format", format_char);
+ /* ??? The a and A formats are C9X extensions, and should be allowed
+ when a C9X option is added. */
+ if (pedantic && info->format_type != strftime_format_type
+ && (format_char == 'a' || format_char == 'A'))
+ warning ("ANSI C does not support the `%c' format", format_char);
format_chars++;
- fci = info->is_scan ? scan_char_table : print_char_table;
+ switch (info->format_type)
+ {
+ case printf_format_type:
+ fci = print_char_table;
+ break;
+ case scanf_format_type:
+ fci = scan_char_table;
+ break;
+ case strftime_format_type:
+ fci = time_char_table;
+ break;
+ default:
+ abort ();
+ }
while (fci->format_chars != 0
&& index (fci->format_chars, format_char) == 0)
++fci;
if (fci->format_chars == 0)
{
if (format_char >= 040 && format_char < 0177)
- sprintf (message,
- "unknown conversion type character `%c' in format",
+ warning ("unknown conversion type character `%c' in format",
format_char);
else
- sprintf (message,
- "unknown conversion type character 0x%x in format",
+ warning ("unknown conversion type character 0x%x in format",
format_char);
- warning (message);
continue;
}
- if (wide && index (fci->flag_chars, 'w') == 0)
+ if (pedantic)
{
- sprintf (message, "width used with `%c' format",
- format_char);
- warning (message);
+ if (index (fci->flag_chars, 'G') != 0)
+ warning ("ANSI C does not support `%%%c'", format_char);
+ if (index (fci->flag_chars, 'o') != 0
+ && index (flag_chars, 'O') != 0)
+ warning ("ANSI C does not support `%%O%c'", format_char);
}
+ if (wide && index (fci->flag_chars, 'w') == 0)
+ warning ("width used with `%c' format", format_char);
+ if (index (fci->flag_chars, '2') != 0)
+ warning ("`%%%c' yields only last 2 digits of year", format_char);
+ else if (index (fci->flag_chars, '3') != 0)
+ warning ("`%%%c' yields only last 2 digits of year in some locales",
+ format_char);
if (precise && index (fci->flag_chars, 'p') == 0)
- {
- sprintf (message, "precision used with `%c' format",
- format_char);
- warning (message);
- }
+ warning ("precision used with `%c' format", format_char);
if (aflag && index (fci->flag_chars, 'a') == 0)
{
- sprintf (message, "`a' flag used with `%c' format",
- format_char);
- warning (message);
+ warning ("`a' flag used with `%c' format", format_char);
+ /* To simplify the following code. */
+ aflag = 0;
}
- if (info->is_scan && format_char == '[')
+ /* The a flag is a GNU extension. */
+ else if (pedantic && aflag)
+ warning ("ANSI C does not support the `a' flag");
+ if (info->format_type == scanf_format_type && format_char == '[')
{
/* Skip over scan set, in case it happens to have '%' in it. */
if (*format_chars == '^')
while (*format_chars && *format_chars != ']')
++format_chars;
if (*format_chars != ']')
- /* The end of the format string was reached. */
- warning ("no closing `]' for `%%[' format");
+ /* The end of the format string was reached. */
+ warning ("no closing `]' for `%%[' format");
}
if (suppressed)
{
if (index (fci->flag_chars, '*') == 0)
- {
- sprintf (message,
- "suppression of `%c' conversion in format",
- format_char);
- warning (message);
- }
+ warning ("suppression of `%c' conversion in format", format_char);
continue;
}
for (i = 0; flag_chars[i] != 0; ++i)
{
if (index (fci->flag_chars, flag_chars[i]) == 0)
- {
- sprintf (message, "flag `%c' used with type `%c'",
- flag_chars[i], format_char);
- warning (message);
- }
+ warning ("flag `%c' used with type `%c'",
+ flag_chars[i], format_char);
}
+ if (info->format_type == strftime_format_type)
+ continue;
if (precise && index (flag_chars, '0') != 0
&& (format_char == 'd' || format_char == 'i'
|| format_char == 'o' || format_char == 'u'
|| format_char == 'x' || format_char == 'x'))
- {
- sprintf (message,
- "precision and `0' flag not both allowed with `%c' format",
- format_char);
- warning (message);
- }
+ warning ("`0' flag ignored with precision specifier and `%c' format",
+ format_char);
switch (length_char)
{
default: wanted_type = fci->nolen ? *(fci->nolen) : 0; break;
+ case 'H': wanted_type = fci->hhlen ? *(fci->hhlen) : 0; break;
case 'h': wanted_type = fci->hlen ? *(fci->hlen) : 0; break;
case 'l': wanted_type = fci->llen ? *(fci->llen) : 0; break;
+ case 'q': wanted_type = fci->qlen ? *(fci->qlen) : 0; break;
case 'L': wanted_type = fci->bigllen ? *(fci->bigllen) : 0; break;
+ case 'Z': wanted_type = fci->zlen ? *fci->zlen : 0; break;
}
if (wanted_type == 0)
- {
- sprintf (message,
- "use of `%c' length character with `%c' type character",
- length_char, format_char);
- warning (message);
- }
-
- /*
- ** XXX -- should kvetch about stuff such as
- ** {
- ** const int i;
- **
- ** scanf ("%d", &i);
- ** }
- */
+ warning ("use of `%c' length character with `%c' type character",
+ length_char, format_char);
/* Finally. . .check type of argument against desired type! */
if (info->first_arg_num == 0)
continue;
+ if (fci->pointer_count == 0 && wanted_type == void_type_node)
+ /* This specifier takes no argument. */
+ continue;
if (params == 0)
{
warning (tfaff);
++arg_num;
cur_type = TREE_TYPE (cur_param);
+ STRIP_NOPS (cur_param);
+
/* Check the types of any additional pointer arguments
that precede the "real" argument. */
- for (i = 0; i < fci->pointer_count; ++i)
+ for (i = 0; i < fci->pointer_count + aflag; ++i)
{
if (TREE_CODE (cur_type) == POINTER_TYPE)
{
cur_type = TREE_TYPE (cur_type);
+
+ if (cur_param != 0 && TREE_CODE (cur_param) == ADDR_EXPR)
+ cur_param = TREE_OPERAND (cur_param, 0);
+ else
+ cur_param = 0;
+
continue;
}
- sprintf (message,
- "format argument is not a %s (arg %d)",
- ((fci->pointer_count == 1) ? "pointer" : "pointer to a pointer"),
- arg_num);
- warning (message);
+ if (TREE_CODE (cur_type) != ERROR_MARK)
+ warning ("format argument is not a %s (arg %d)",
+ ((fci->pointer_count + aflag == 1)
+ ? "pointer" : "pointer to a pointer"),
+ arg_num);
break;
}
+ /* See if this is an attempt to write into a const type with
+ scanf or with printf "%n". */
+ if ((info->format_type == scanf_format_type
+ || (info->format_type == printf_format_type
+ && format_char == 'n'))
+ && i == fci->pointer_count + aflag
+ && wanted_type != 0
+ && TREE_CODE (cur_type) != ERROR_MARK
+ && (TYPE_READONLY (cur_type)
+ || (cur_param != 0
+ && (TREE_CODE_CLASS (TREE_CODE (cur_param)) == 'c'
+ || (TREE_CODE_CLASS (TREE_CODE (cur_param)) == 'd'
+ && TREE_READONLY (cur_param))))))
+ warning ("writing into constant object (arg %d)", arg_num);
+
/* Check the type of the "real" argument, if there's a type we want. */
- if (i == fci->pointer_count && wanted_type != 0
+ if (i == fci->pointer_count + aflag && wanted_type != 0
+ && TREE_CODE (cur_type) != ERROR_MARK
&& wanted_type != TYPE_MAIN_VARIANT (cur_type)
/* If we want `void *', allow any pointer type.
(Anything else would already have got a warning.) */
{
register char *this;
register char *that;
-
+
this = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (wanted_type)));
that = 0;
if (TREE_CODE (cur_type) != ERROR_MARK
that = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (cur_type)));
if (strcmp (this, that) != 0)
- {
- sprintf (message, "%s format, %s arg (arg %d)",
- this, that, arg_num);
- warning (message);
- }
+ warning ("%s format, %s arg (arg %d)", this, that, arg_num);
}
}
}
constant_expression_warning (value)
tree value;
{
- if (TREE_CODE (value) == INTEGER_CST && TREE_CONSTANT_OVERFLOW (value))
- if (pedantic)
- pedwarn ("overflow in constant expression");
+ if ((TREE_CODE (value) == INTEGER_CST || TREE_CODE (value) == REAL_CST
+ || TREE_CODE (value) == COMPLEX_CST)
+ && TREE_CONSTANT_OVERFLOW (value) && pedantic)
+ pedwarn ("overflow in constant expression");
}
/* Print a warning if an expression had overflow in folding.
overflow_warning (value)
tree value;
{
- if (TREE_CODE (value) == INTEGER_CST && TREE_OVERFLOW (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;
- warning ("integer overflow in expression");
+ 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");
}
}
if (TREE_CODE (operand) == INTEGER_CST
&& TREE_CODE (TREE_TYPE (result)) == INTEGER_TYPE
&& TREE_UNSIGNED (TREE_TYPE (result))
+ && skip_evaluation == 0
&& !int_fits_type_p (operand, TREE_TYPE (result)))
{
if (!int_fits_type_p (operand, signed_type (TREE_TYPE (result))))
{
TREE_OVERFLOW (t) = 0;
+ /* Do not diagnose overflow in a constant expression merely
+ because a conversion overflowed. */
+ TREE_CONSTANT_OVERFLOW (t) = TREE_CONSTANT_OVERFLOW (expr);
+
/* No warning for converting 0x80000000 to int. */
if (!(TREE_UNSIGNED (type) < TREE_UNSIGNED (TREE_TYPE (expr))
&& TREE_CODE (TREE_TYPE (expr)) == INTEGER_TYPE
&& TYPE_PRECISION (type) == TYPE_PRECISION (TREE_TYPE (expr))))
/* If EXPR fits in the unsigned version of TYPE,
don't warn unless pedantic. */
- if (pedantic
- || TREE_UNSIGNED (type)
- || ! int_fits_type_p (expr, unsigned_type (type)))
+ if ((pedantic
+ || TREE_UNSIGNED (type)
+ || ! int_fits_type_p (expr, unsigned_type (type)))
+ && skip_evaluation == 0)
warning ("overflow in implicit constant conversion");
}
else
unsigned 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 (integer_type_node))
- return unsignedp ? unsigned_type_node : integer_type_node;
-
if (bits == TYPE_PRECISION (long_integer_type_node))
return unsignedp ? long_unsigned_type_node : long_integer_type_node;
enum machine_mode mode;
int unsignedp;
{
+ 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 (integer_type_node))
- return unsignedp ? unsigned_type_node : 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 (intDI_type_node))
return unsignedp ? unsigned_intDI_type_node : intDI_type_node;
+ if (mode == TYPE_MODE (intTI_type_node))
+ return unsignedp ? unsigned_intTI_type_node : intTI_type_node;
+
if (mode == TYPE_MODE (float_type_node))
return float_type_node;
return 0;
}
\f
+/* Return the minimum number of bits needed to represent VALUE in a
+ signed or unsigned type, UNSIGNEDP says which. */
+
+int
+min_precision (value, unsignedp)
+ tree value;
+ int unsignedp;
+{
+ int log;
+
+ /* If the value is negative, compute its negative minus 1. The latter
+ adjustment is because the absolute value of the largest negative value
+ is one larger than the largest positive value. This is equivalent to
+ a bit-wise negation, so use that operation instead. */
+
+ if (tree_int_cst_sgn (value) < 0)
+ value = fold (build1 (BIT_NOT_EXPR, TREE_TYPE (value), value));
+
+ /* Return the number of bits needed, taking into account the fact
+ that we need one more bit for a signed than unsigned type. */
+
+ if (integer_zerop (value))
+ log = 0;
+ else if (TREE_INT_CST_HIGH (value) != 0)
+ log = HOST_BITS_PER_WIDE_INT + floor_log2 (TREE_INT_CST_HIGH (value));
+ else
+ log = floor_log2 (TREE_INT_CST_LOW (value));
+
+ return log + 1 + ! unsignedp;
+}
+\f
/* Print an error message for invalid operands to arith operation CODE.
NOP_EXPR is used as a special case (see truthvalue_conversion). */
enum tree_code code;
{
register char *opname;
+
switch (code)
{
case NOP_EXPR:
case LROTATE_EXPR:
case RROTATE_EXPR:
opname = "rotate"; break;
+ default:
+ opname = "unknown"; break;
}
error ("invalid operands to binary %s", opname);
}
real2 = TREE_CODE (TREE_TYPE (primop1)) == REAL_TYPE;
/* If first arg is constant, swap the args (changing operation
- so value is preserved), for canonicalization. */
+ so value is preserved), for canonicalization. Don't do this if
+ the second arg is 0. */
- if (TREE_CONSTANT (primop0))
+ if (TREE_CONSTANT (primop0)
+ && ! integer_zerop (primop1) && ! real_zerop (primop1))
{
register tree tem = primop0;
register int temi = unsignedp0;
case GE_EXPR:
code = LE_EXPR;
break;
+ default:
+ break;
}
*rescode_ptr = code;
}
if (code == NE_EXPR)
{
if (max_lt || min_gt)
- val = integer_one_node;
+ val = boolean_true_node;
}
else if (code == EQ_EXPR)
{
if (max_lt || min_gt)
- val = integer_zero_node;
+ val = boolean_false_node;
}
else if (code == LT_EXPR)
{
if (max_lt)
- val = integer_one_node;
+ val = boolean_true_node;
if (!min_lt)
- val = integer_zero_node;
+ val = boolean_false_node;
}
else if (code == GT_EXPR)
{
if (min_gt)
- val = integer_one_node;
+ val = boolean_true_node;
if (!max_gt)
- val = integer_zero_node;
+ val = boolean_false_node;
}
else if (code == LE_EXPR)
{
if (!max_gt)
- val = integer_one_node;
+ val = boolean_true_node;
if (min_gt)
- val = integer_zero_node;
+ val = boolean_false_node;
}
else if (code == GE_EXPR)
{
if (!min_lt)
- val = integer_one_node;
+ val = boolean_true_node;
if (max_lt)
- val = integer_zero_node;
+ val = boolean_false_node;
}
/* If primop0 was sign-extended and unsigned comparison specd,
primop1 = TYPE_MAX_VALUE (type);
val = 0;
break;
+
+ default:
+ break;
}
type = unsigned_type (type);
}
{
/* This is the case of (char)x >?< 0x80, which people used to use
expecting old C compilers to change the 0x80 into -0x80. */
- if (val == integer_zero_node)
+ if (val == boolean_false_node)
warning ("comparison is always 0 due to limited range of data type");
- if (val == integer_one_node)
+ if (val == boolean_true_node)
warning ("comparison is always 1 due to limited range of data type");
}
if (!min_lt && unsignedp0 && TREE_CODE (primop0) != INTEGER_CST)
{
/* This is the case of (unsigned char)x >?< -1 or < 0. */
- if (val == integer_zero_node)
+ if (val == boolean_false_node)
warning ("comparison is always 0 due to limited range of data type");
- if (val == integer_one_node)
+ if (val == boolean_true_node)
warning ("comparison is always 1 due to limited range of data type");
}
primop1 = op1;
if (!real1 && !real2 && integer_zerop (primop1)
- && TREE_UNSIGNED (TREE_TYPE (primop0)))
+ && TREE_UNSIGNED (*restype_ptr))
{
tree value = 0;
switch (code)
{
case GE_EXPR:
- if (extra_warnings)
+ /* All unsigned values are >= 0, so we warn if extra warnings
+ are requested. However, if OP0 is a constant that is
+ >= 0, the signedness of the comparison isn't an issue,
+ so suppress the warning. */
+ if (extra_warnings
+ && ! (TREE_CODE (primop0) == INTEGER_CST
+ && ! TREE_OVERFLOW (convert (signed_type (type),
+ primop0))))
warning ("unsigned value >= 0 is always 1");
- value = integer_one_node;
+ value = boolean_true_node;
break;
case LT_EXPR:
- if (extra_warnings)
+ if (extra_warnings
+ && ! (TREE_CODE (primop0) == INTEGER_CST
+ && ! TREE_OVERFLOW (convert (signed_type (type),
+ primop0))))
warning ("unsigned value < 0 is always 0");
- value = integer_zero_node;
+ value = boolean_false_node;
+ break;
+
+ default:
+ break;
}
if (value != 0)
*op0_ptr = convert (type, primop0);
*op1_ptr = convert (type, primop1);
- *restype_ptr = integer_type_node;
+ *restype_ptr = boolean_type_node;
return 0;
}
This preparation consists of taking the ordinary
representation of an expression expr and producing a valid tree
boolean expression describing whether expr is nonzero. We could
- simply always do build_binary_op (NE_EXPR, expr, integer_zero_node, 1),
+ simply always do build_binary_op (NE_EXPR, expr, boolean_false_node, 1),
but we optimize comparisons, &&, ||, and !.
- The resulting type should always be `integer_type_node'. */
+ The resulting type should always be `boolean_type_node'. */
tree
truthvalue_conversion (expr)
tree expr;
{
- register enum tree_code code;
-
if (TREE_CODE (expr) == ERROR_MARK)
return expr;
{
case RECORD_TYPE:
error ("struct type value used where scalar is required");
- return integer_zero_node;
+ return boolean_false_node;
case UNION_TYPE:
error ("union type value used where scalar is required");
- return integer_zero_node;
+ return boolean_false_node;
case ARRAY_TYPE:
error ("array type value used where scalar is required");
- return integer_zero_node;
+ return boolean_false_node;
default:
break;
case TRUTH_AND_EXPR:
case TRUTH_OR_EXPR:
case TRUTH_XOR_EXPR:
+ case TRUTH_NOT_EXPR:
+ TREE_TYPE (expr) = boolean_type_node;
+ return expr;
+
case ERROR_MARK:
return expr;
case INTEGER_CST:
- return integer_zerop (expr) ? integer_zero_node : integer_one_node;
+ return integer_zerop (expr) ? boolean_false_node : boolean_true_node;
case REAL_CST:
- return real_zerop (expr) ? integer_zero_node : integer_one_node;
+ return real_zerop (expr) ? boolean_false_node : boolean_true_node;
case ADDR_EXPR:
+ /* If we are taking the address of a external decl, it might be zero
+ if it is weak, so we cannot optimize. */
+ if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (expr, 0))) == 'd'
+ && DECL_EXTERNAL (TREE_OPERAND (expr, 0)))
+ break;
+
if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 0)))
- return build (COMPOUND_EXPR, integer_type_node,
- TREE_OPERAND (expr, 0), integer_one_node);
+ return build (COMPOUND_EXPR, boolean_type_node,
+ TREE_OPERAND (expr, 0), boolean_true_node);
else
- return integer_one_node;
+ return boolean_true_node;
case COMPLEX_EXPR:
return build_binary_op ((TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))
/* These don't change whether an object is zero or non-zero, but
we can't ignore them if their second arg has side-effects. */
if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)))
- return build (COMPOUND_EXPR, integer_type_node, TREE_OPERAND (expr, 1),
+ return build (COMPOUND_EXPR, boolean_type_node, TREE_OPERAND (expr, 1),
truthvalue_conversion (TREE_OPERAND (expr, 0)));
else
return truthvalue_conversion (TREE_OPERAND (expr, 0));
-
+
case COND_EXPR:
/* Distribute the conversion into the arms of a COND_EXPR. */
- return fold (build (COND_EXPR, integer_type_node, TREE_OPERAND (expr, 0),
+ return fold (build (COND_EXPR, boolean_type_node, TREE_OPERAND (expr, 0),
truthvalue_conversion (TREE_OPERAND (expr, 1)),
truthvalue_conversion (TREE_OPERAND (expr, 2))));
if (TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE
|| TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == REFERENCE_TYPE)
break;
- /* fall through... */
+ /* fall through... */
case NOP_EXPR:
/* If this is widening the argument, we can ignore it. */
if (TYPE_PRECISION (TREE_TYPE (expr))
if (TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT
&& TREE_CODE (TREE_TYPE (expr)) == REAL_TYPE)
break;
- /* fall through... */
+ /* fall through... */
case BIT_XOR_EXPR:
/* This and MINUS_EXPR can be changed into a comparison of the
two objects. */
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) != boolean_type_node)
+ /* Using convert here would cause infinite recursion. */
+ return build1 (NOP_EXPR, boolean_type_node, expr);
+ break;
+
case MODIFY_EXPR:
if (warn_parentheses && C_EXP_ORIGINAL_CODE (expr) == MODIFY_EXPR)
warning ("suggest parentheses around assignment used as truth value");
break;
+
+ default:
+ break;
}
if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE)
return build_binary_op (NE_EXPR, expr, integer_zero_node, 1);
}
\f
+#if USE_CPPLIB
/* Read the rest of a #-directive from input stream FINPUT.
In normal use, the directive name and the white space after it
have already been read, so they won't be included in the result.
The value is a string in a reusable buffer. It remains valid
only until the next time this function is called. */
+unsigned char *yy_cur, *yy_lim;
+
+#define GETC() (yy_cur < yy_lim ? *yy_cur++ : yy_get_token ())
+#define UNGETC(c) ((c), yy_cur--)
+
+int
+yy_get_token ()
+{
+ for (;;)
+ {
+ parse_in.limit = parse_in.token_buffer;
+ cpp_token = cpp_get_token (&parse_in);
+ if (cpp_token == CPP_EOF)
+ return -1;
+ yy_lim = CPP_PWRITTEN (&parse_in);
+ yy_cur = parse_in.token_buffer;
+ if (yy_cur < yy_lim)
+ return *yy_cur++;
+ }
+}
+
+char *
+get_directive_line ()
+{
+ static char *directive_buffer = NULL;
+ static unsigned buffer_length = 0;
+ register char *p;
+ register char *buffer_limit;
+ register int looking_for = 0;
+ register int char_escaped = 0;
+
+ if (buffer_length == 0)
+ {
+ directive_buffer = (char *)xmalloc (128);
+ buffer_length = 128;
+ }
+
+ buffer_limit = &directive_buffer[buffer_length];
+
+ for (p = directive_buffer; ; )
+ {
+ int c;
+
+ /* Make buffer bigger if it is full. */
+ if (p >= buffer_limit)
+ {
+ register unsigned bytes_used = (p - directive_buffer);
+
+ buffer_length *= 2;
+ directive_buffer
+ = (char *)xrealloc (directive_buffer, buffer_length);
+ p = &directive_buffer[bytes_used];
+ buffer_limit = &directive_buffer[buffer_length];
+ }
+
+ c = GETC ();
+
+ /* Discard initial whitespace. */
+ if ((c == ' ' || c == '\t') && p == directive_buffer)
+ continue;
+
+ /* Detect the end of the directive. */
+ if (c == '\n' && looking_for == 0)
+ {
+ UNGETC (c);
+ c = '\0';
+ }
+
+ *p++ = c;
+
+ if (c == 0)
+ return directive_buffer;
+
+ /* Handle string and character constant syntax. */
+ if (looking_for)
+ {
+ if (looking_for == c && !char_escaped)
+ looking_for = 0; /* Found terminator... stop looking. */
+ }
+ else
+ if (c == '\'' || c == '"')
+ looking_for = c; /* Don't stop buffering until we see another
+ another one of these (or an EOF). */
+
+ /* Handle backslash. */
+ char_escaped = (c == '\\' && ! char_escaped);
+ }
+}
+#else
+/* Read the rest of a #-directive from input stream FINPUT.
+ In normal use, the directive name and the white space after it
+ have already been read, so they won't be included in the result.
+ We allow for the fact that the directive line may contain
+ a newline embedded within a character or string literal which forms
+ a part of the directive.
+
+ The value is a string in a reusable buffer. It remains valid
+ only until the next time this function is called.
+
+ The terminating character ('\n' or EOF) is left in FINPUT for the
+ caller to re-read. */
char *
get_directive_line (finput)
continue;
/* Detect the end of the directive. */
- if (c == '\n' && looking_for == 0)
+ if (looking_for == 0
+ && (c == '\n' || c == EOF))
{
ungetc (c, finput);
c = '\0';
else
if (c == '\'' || c == '"')
looking_for = c; /* Don't stop buffering until we see another
- another one of these (or an EOF). */
+ one of these (or an EOF). */
/* Handle backslash. */
char_escaped = (c == '\\' && ! char_escaped);
}
}
+#endif /* !USE_CPPLIB */
\f
/* Make a variant type in the proper way for C/C++, propagating qualifiers
down to the element type of an array. */
int constp, volatilep;
{
if (TREE_CODE (type) == ARRAY_TYPE)
- {
- tree real_main_variant = TYPE_MAIN_VARIANT (type);
-
- push_obstacks (TYPE_OBSTACK (type), TYPE_OBSTACK (type));
- type = build_array_type (c_build_type_variant (TREE_TYPE (type),
- constp, volatilep),
- TYPE_DOMAIN (type));
- TYPE_MAIN_VARIANT (type) = real_main_variant;
- pop_obstacks ();
- }
+ return build_array_type (c_build_type_variant (TREE_TYPE (type),
+ constp, volatilep),
+ TYPE_DOMAIN (type));
return build_type_variant (type, constp, volatilep);
}
OSDN Git Service
