#include "diagnostic.h"
#include "tm_p.h"
#include "obstack.h"
-#include "c-lex.h"
#include "cpplib.h"
#include "target.h"
#include "langhooks.h"
-cpp_reader *parse_in; /* Declared in c-lex.h. */
+#include "except.h" /* For USING_SJLJ_EXCEPTIONS. */
-#undef WCHAR_TYPE_SIZE
-#define WCHAR_TYPE_SIZE TYPE_PRECISION (wchar_type_node)
+cpp_reader *parse_in; /* Declared in c-pragma.h. */
/* We let tm.h override the types used here, to handle trivial differences
such as the choice of unsigned int or long unsigned int for size_t.
#define WCHAR_TYPE "int"
#endif
+/* WCHAR_TYPE gets overridden by -fshort-wchar. */
+#define MODIFIED_WCHAR_TYPE \
+ (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
+
#ifndef PTRDIFF_TYPE
#define PTRDIFF_TYPE "long int"
#endif
: "long long unsigned int"))
#endif
+#ifndef STDC_0_IN_SYSTEM_HEADERS
+#define STDC_0_IN_SYSTEM_HEADERS 0
+#endif
+
+#ifndef REGISTER_PREFIX
+#define REGISTER_PREFIX ""
+#endif
+
/* The variant of the C language being processed. */
enum c_language_kind c_language;
/* Nonzero if prepreprocessing only. */
int flag_preprocess_only;
+/* Nonzero if an ISO standard was selected. It rejects macros in the
+ user's namespace. */
+int flag_iso;
+
+/* Nonzero if -undef was given. It suppresses target built-in macros
+ and assertions. */
+int flag_undef;
+
/* Nonzero means don't recognize the non-ANSI builtin functions. */
int flag_no_builtin;
int flag_short_wchar;
+/* Nonzero means warn about use of multicharacter literals. */
+
+int warn_multichar = 1;
+
/* Nonzero means warn about possible violations of sequence point rules. */
int warn_sequence_point;
/* Nonzero means to warn about compile-time division by zero. */
int warn_div_by_zero = 1;
+/* Warn about NULL being passed to argument slots marked as requiring
+ non-NULL. */
+
+int warn_nonnull;
+
/* The elements of `ridpointers' are identifier nodes for the reserved
type names and storage classes. It is indexed by a RID_... value. */
tree *ridpointers;
/* Stack pointer. */
static int if_stack_pointer = 0;
+static void cb_register_builtins PARAMS ((cpp_reader *));
+
+static tree handle_packed_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_nocommon_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_common_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_noreturn_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_noinline_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_always_inline_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_used_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_unused_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_const_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_transparent_union_attribute PARAMS ((tree *, tree, tree,
+ int, bool *));
+static tree handle_constructor_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_destructor_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_mode_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_section_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_aligned_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_weak_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_alias_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_visibility_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_no_instrument_function_attribute PARAMS ((tree *, tree,
+ tree, int,
+ bool *));
+static tree handle_malloc_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_no_limit_stack_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_pure_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_deprecated_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_vector_size_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_nonnull_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree handle_nothrow_attribute PARAMS ((tree *, tree, tree, int,
+ bool *));
+static tree vector_size_helper PARAMS ((tree, tree));
+
+static void check_function_nonnull PARAMS ((tree, tree));
+static void check_nonnull_arg PARAMS ((void *, tree,
+ unsigned HOST_WIDE_INT));
+static bool nonnull_check_p PARAMS ((tree, unsigned HOST_WIDE_INT));
+static bool get_nonnull_operand PARAMS ((tree,
+ unsigned HOST_WIDE_INT *));
+void builtin_define_std PARAMS ((const char *));
+static void builtin_define_with_value PARAMS ((const char *, const char *,
+ int));
+
+/* Table of machine-independent attributes common to all C-like languages. */
+const struct attribute_spec c_common_attribute_table[] =
+{
+ /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */
+ { "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 },
+ /* FIXME: logically, noreturn attributes should be listed as
+ "false, true, true" and apply to function types. But implementing this
+ would require all the places in the compiler that use TREE_THIS_VOLATILE
+ on a decl to identify non-returning functions to be located and fixed
+ to check the function type instead. */
+ { "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 },
+ /* The same comments as for noreturn attributes apply to const ones. */
+ { "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 },
+ { "vector_size", 1, 1, false, true, false,
+ handle_vector_size_attribute },
+ { "visibility", 1, 1, true, false, false,
+ handle_visibility_attribute },
+ { "nonnull", 0, -1, false, true, true,
+ handle_nonnull_attribute },
+ { "nothrow", 0, 0, true, false, false,
+ handle_nothrow_attribute },
+ { NULL, 0, 0, false, false, false, NULL }
+};
+
+/* Give the specifications for the format attributes, used by C and all
+ descendents. */
+
+const struct attribute_spec c_common_format_attribute_table[] =
+{
+ /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */
+ { "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 }
+};
+
/* Record the start of an if-then, and record the start of it
for ambiguous else detection.
return decl;
}
-/* Given a chain of STRING_CST nodes,
- concatenate them into one STRING_CST
- and give it a suitable array-of-chars data type. */
+/* Given a STRING_CST, give it a suitable array-of-chars data type. */
tree
-combine_strings (strings)
- tree strings;
+fix_string_type (value)
+ tree value;
{
- tree value, t;
- int length = 1;
- int wide_length = 0;
- int wide_flag = 0;
- int wchar_bytes = TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT;
- int nchars;
+ 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 nchars_max = flag_isoc99 ? 4095 : 509;
-
- if (TREE_CHAIN (strings))
- {
- /* More than one in the chain, so concatenate. */
- char *p, *q;
-
- /* Don't include the \0 at the end of each substring,
- except for the last one.
- Count wide strings and ordinary strings separately. */
- for (t = strings; t; t = TREE_CHAIN (t))
- {
- if (TREE_TYPE (t) == wchar_array_type_node)
- {
- wide_length += (TREE_STRING_LENGTH (t) - wchar_bytes);
- wide_flag = 1;
- }
- else
- {
- length += (TREE_STRING_LENGTH (t) - 1);
- if (C_ARTIFICIAL_STRING_P (t) && !in_system_header)
- warning ("concatenation of string literals with __FUNCTION__ is deprecated. This feature will be removed in future");
- }
- }
-
- /* If anything is wide, the non-wides will be converted,
- which makes them take more space. */
- if (wide_flag)
- length = length * wchar_bytes + wide_length;
-
- p = alloca (length);
-
- /* Copy the individual strings into the new combined string.
- If the combined string is wide, convert the chars to ints
- for any individual strings that are not wide. */
-
- q = p;
- for (t = strings; t; t = TREE_CHAIN (t))
- {
- int len = (TREE_STRING_LENGTH (t)
- - ((TREE_TYPE (t) == wchar_array_type_node)
- ? wchar_bytes : 1));
- if ((TREE_TYPE (t) == wchar_array_type_node) == wide_flag)
- {
- memcpy (q, TREE_STRING_POINTER (t), len);
- q += len;
- }
- else
- {
- int i, j;
- for (i = 0; i < len; i++)
- {
- if (BYTES_BIG_ENDIAN)
- {
- for (j=0; j<(WCHAR_TYPE_SIZE / BITS_PER_UNIT)-1; j++)
- *q++ = 0;
- *q++ = TREE_STRING_POINTER (t)[i];
- }
- else
- {
- *q++ = TREE_STRING_POINTER (t)[i];
- for (j=0; j<(WCHAR_TYPE_SIZE / BITS_PER_UNIT)-1; j++)
- *q++ = 0;
- }
- }
- }
- }
- if (wide_flag)
- {
- int i;
- for (i = 0; i < wchar_bytes; i++)
- *q++ = 0;
- }
- else
- *q = 0;
-
- value = build_string (length, p);
- }
- else
- {
- value = strings;
- length = TREE_STRING_LENGTH (value);
- if (TREE_TYPE (value) == wchar_array_type_node)
- wide_flag = 1;
- }
+ int length = TREE_STRING_LENGTH (value);
+ int nchars;
/* Compute the number of elements, for the array type. */
nchars = wide_flag ? length / wchar_bytes : length;
TREE_STATIC (value) = 1;
return value;
}
+
+/* Given a VARRAY of STRING_CST nodes, concatenate them into one
+ STRING_CST. */
+
+tree
+combine_strings (strings)
+ varray_type strings;
+{
+ const int wchar_bytes = TYPE_PRECISION (wchar_type_node) / BITS_PER_UNIT;
+ const int nstrings = VARRAY_ACTIVE_SIZE (strings);
+ tree value, t;
+ int length = 1;
+ int wide_length = 0;
+ int wide_flag = 0;
+ int i;
+ char *p, *q;
+
+ /* Don't include the \0 at the end of each substring. Count wide
+ strings and ordinary strings separately. */
+ for (i = 0; i < nstrings; ++i)
+ {
+ t = VARRAY_TREE (strings, i);
+
+ if (TREE_TYPE (t) == wchar_array_type_node)
+ {
+ wide_length += TREE_STRING_LENGTH (t) - wchar_bytes;
+ wide_flag = 1;
+ }
+ else
+ {
+ length += (TREE_STRING_LENGTH (t) - 1);
+ if (C_ARTIFICIAL_STRING_P (t) && !in_system_header)
+ warning ("concatenation of string literals with __FUNCTION__ is deprecated");
+ }
+ }
+
+ /* If anything is wide, the non-wides will be converted,
+ which makes them take more space. */
+ if (wide_flag)
+ length = length * wchar_bytes + wide_length;
+
+ p = xmalloc (length);
+
+ /* Copy the individual strings into the new combined string.
+ If the combined string is wide, convert the chars to ints
+ for any individual strings that are not wide. */
+
+ q = p;
+ for (i = 0; i < nstrings; ++i)
+ {
+ int len, this_wide;
+
+ t = VARRAY_TREE (strings, i);
+ this_wide = TREE_TYPE (t) == wchar_array_type_node;
+ len = TREE_STRING_LENGTH (t) - (this_wide ? wchar_bytes : 1);
+ if (this_wide == wide_flag)
+ {
+ memcpy (q, TREE_STRING_POINTER (t), len);
+ q += len;
+ }
+ else
+ {
+ const int nzeros = (TYPE_PRECISION (wchar_type_node)
+ / BITS_PER_UNIT) - 1;
+ int j, k;
+
+ if (BYTES_BIG_ENDIAN)
+ {
+ for (k = 0; k < len; k++)
+ {
+ for (j = 0; j < nzeros; j++)
+ *q++ = 0;
+ *q++ = TREE_STRING_POINTER (t)[k];
+ }
+ }
+ else
+ {
+ for (k = 0; k < len; k++)
+ {
+ *q++ = TREE_STRING_POINTER (t)[k];
+ for (j = 0; j < nzeros; j++)
+ *q++ = 0;
+ }
+ }
+ }
+ }
+
+ /* Nul terminate the string. */
+ if (wide_flag)
+ {
+ for (i = 0; i < wchar_bytes; i++)
+ *q++ = 0;
+ }
+ else
+ *q = 0;
+
+ value = build_string (length, p);
+ free (p);
+
+ if (wide_flag)
+ TREE_TYPE (value) = wchar_array_type_node;
+ else
+ TREE_TYPE (value) = char_array_type_node;
+
+ return value;
+}
\f
static int is_valid_printf_arglist PARAMS ((tree));
static rtx c_expand_builtin PARAMS ((tree, rtx, enum machine_mode, enum expand_modifier));
unsigned_conversion_warning (result, operand)
tree result, operand;
{
+ tree type = TREE_TYPE (result);
+
if (TREE_CODE (operand) == INTEGER_CST
- && TREE_CODE (TREE_TYPE (result)) == INTEGER_TYPE
- && TREE_UNSIGNED (TREE_TYPE (result))
+ && TREE_CODE (type) == INTEGER_TYPE
+ && TREE_UNSIGNED (type)
&& skip_evaluation == 0
- && !int_fits_type_p (operand, TREE_TYPE (result)))
+ && !int_fits_type_p (operand, type))
{
- if (!int_fits_type_p (operand, signed_type (TREE_TYPE (result))))
+ if (!int_fits_type_p (operand, c_common_signed_type (type)))
/* This detects cases like converting -129 or 256 to unsigned char. */
warning ("large integer implicitly truncated to unsigned type");
else if (warn_conversion)
don't warn unless pedantic. */
if ((pedantic
|| TREE_UNSIGNED (type)
- || ! constant_fits_type_p (expr, unsigned_type (type)))
+ || ! constant_fits_type_p (expr,
+ c_common_unsigned_type (type)))
&& skip_evaluation == 0)
warning ("overflow in implicit constant conversion");
}
return unsignedp ? unsigned_V8HI_type_node : V8HI_type_node;
case V4SImode:
return unsignedp ? unsigned_V4SI_type_node : V4SI_type_node;
+ case V2DImode:
+ return unsignedp ? unsigned_V2DI_type_node : V2DI_type_node;
case V2SImode:
return unsignedp ? unsigned_V2SI_type_node : V2SI_type_node;
case V4HImode:
return V4SF_type_node;
case V2SFmode:
return V2SF_type_node;
+ case V2DFmode:
+ return V2DF_type_node;
default:
break;
}
/* Return an unsigned type the same as TYPE in other respects. */
tree
-unsigned_type (type)
+c_common_unsigned_type (type)
tree type;
{
tree type1 = TYPE_MAIN_VARIANT (type);
if (type1 == intQI_type_node)
return unsigned_intQI_type_node;
- return signed_or_unsigned_type (1, type);
+ return c_common_signed_or_unsigned_type (1, type);
}
/* Return a signed type the same as TYPE in other respects. */
tree
-signed_type (type)
+c_common_signed_type (type)
tree type;
{
tree type1 = TYPE_MAIN_VARIANT (type);
if (type1 == unsigned_intQI_type_node)
return intQI_type_node;
- return signed_or_unsigned_type (0, type);
+ return c_common_signed_or_unsigned_type (0, type);
}
/* Return a type the same as TYPE except unsigned or
signed according to UNSIGNEDP. */
tree
-signed_or_unsigned_type (unsignedp, type)
+c_common_signed_or_unsigned_type (unsignedp, type)
int unsignedp;
tree type;
{
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). */
+/* Print an error message for invalid operands to arith operation
+ CODE. NOP_EXPR is used as a special case (see
+ c_common_truthvalue_conversion). */
void
binary_op_error (code)
int unsignedp = TREE_UNSIGNED (*restype_ptr);
tree val;
- type = signed_or_unsigned_type (unsignedp0, TREE_TYPE (primop0));
+ type = c_common_signed_or_unsigned_type (unsignedp0,
+ TREE_TYPE (primop0));
/* If TYPE is an enumeration, then we need to get its min/max
values from it's underlying integral type, not the enumerated
minval = TYPE_MIN_VALUE (type);
if (unsignedp && !unsignedp0)
- *restype_ptr = signed_type (*restype_ptr);
+ *restype_ptr = c_common_signed_type (*restype_ptr);
if (TREE_TYPE (primop1) != *restype_ptr)
primop1 = convert (*restype_ptr, primop1);
default:
break;
}
- type = unsigned_type (type);
- }
-
- if (!max_gt && !unsignedp0 && TREE_CODE (primop0) != INTEGER_CST)
- {
- /* 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 == boolean_false_node)
- warning ("comparison is always false due to limited range of data type");
- if (val == boolean_true_node)
- warning ("comparison is always true due to limited range of data type");
+ type = c_common_unsigned_type (type);
}
- if (!min_lt && unsignedp0 && TREE_CODE (primop0) != INTEGER_CST)
+ if (TREE_CODE (primop0) != INTEGER_CST)
{
- /* This is the case of (unsigned char)x >?< -1 or < 0. */
if (val == boolean_false_node)
warning ("comparison is always false due to limited range of data type");
if (val == boolean_true_node)
&& TYPE_PRECISION (TREE_TYPE (primop1)) < TYPE_PRECISION (*restype_ptr))
{
type = common_type (TREE_TYPE (primop0), TREE_TYPE (primop1));
- type = signed_or_unsigned_type (unsignedp0
- || TREE_UNSIGNED (*restype_ptr),
- type);
+ type = c_common_signed_or_unsigned_type (unsignedp0
+ || TREE_UNSIGNED (*restype_ptr),
+ type);
/* Make sure shorter operand is extended the right way
to match the longer operand. */
- primop0 = convert (signed_or_unsigned_type (unsignedp0, TREE_TYPE (primop0)),
- primop0);
- primop1 = convert (signed_or_unsigned_type (unsignedp1, TREE_TYPE (primop1)),
- primop1);
+ 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
{
so suppress the warning. */
if (extra_warnings && !in_system_header
&& ! (TREE_CODE (primop0) == INTEGER_CST
- && ! TREE_OVERFLOW (convert (signed_type (type),
+ && ! TREE_OVERFLOW (convert (c_common_signed_type (type),
primop0))))
warning ("comparison of unsigned expression >= 0 is always true");
value = boolean_true_node;
case LT_EXPR:
if (extra_warnings && !in_system_header
&& ! (TREE_CODE (primop0) == INTEGER_CST
- && ! TREE_OVERFLOW (convert (signed_type (type),
+ && ! TREE_OVERFLOW (convert (c_common_signed_type (type),
primop0))))
warning ("comparison of unsigned expression < 0 is always false");
value = boolean_false_node;
The resulting type should always be `boolean_type_node'. */
tree
-truthvalue_conversion (expr)
+c_common_truthvalue_conversion (expr)
tree expr;
{
if (TREE_CODE (expr) == ERROR_MARK)
case COMPLEX_EXPR:
return build_binary_op ((TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1))
? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR),
- truthvalue_conversion (TREE_OPERAND (expr, 0)),
- truthvalue_conversion (TREE_OPERAND (expr, 1)),
+ c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)),
+ c_common_truthvalue_conversion (TREE_OPERAND (expr, 1)),
0);
case NEGATE_EXPR:
case FLOAT_EXPR:
case FFS_EXPR:
/* These don't change whether an object is non-zero or zero. */
- return truthvalue_conversion (TREE_OPERAND (expr, 0));
+ return c_common_truthvalue_conversion (TREE_OPERAND (expr, 0));
case LROTATE_EXPR:
case RROTATE_EXPR:
we can't ignore them if their second arg has side-effects. */
if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 1)))
return build (COMPOUND_EXPR, boolean_type_node, TREE_OPERAND (expr, 1),
- truthvalue_conversion (TREE_OPERAND (expr, 0)));
+ c_common_truthvalue_conversion (TREE_OPERAND (expr, 0)));
else
- return truthvalue_conversion (TREE_OPERAND (expr, 0));
+ return c_common_truthvalue_conversion (TREE_OPERAND (expr, 0));
case COND_EXPR:
/* Distribute the conversion into the arms of a COND_EXPR. */
return fold (build (COND_EXPR, boolean_type_node, TREE_OPERAND (expr, 0),
- truthvalue_conversion (TREE_OPERAND (expr, 1)),
- truthvalue_conversion (TREE_OPERAND (expr, 2))));
+ c_common_truthvalue_conversion (TREE_OPERAND (expr, 1)),
+ c_common_truthvalue_conversion (TREE_OPERAND (expr, 2))));
case CONVERT_EXPR:
/* Don't cancel the effect of a CONVERT_EXPR from a REFERENCE_TYPE,
/* If this is widening the argument, we can ignore it. */
if (TYPE_PRECISION (TREE_TYPE (expr))
>= TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr, 0))))
- return truthvalue_conversion (TREE_OPERAND (expr, 0));
+ return c_common_truthvalue_conversion (TREE_OPERAND (expr, 0));
break;
case MINUS_EXPR:
if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE)
{
- tree tem = save_expr (expr);
+ tree t = save_expr (expr);
return (build_binary_op
((TREE_SIDE_EFFECTS (expr)
? TRUTH_OR_EXPR : TRUTH_ORIF_EXPR),
- truthvalue_conversion (build_unary_op (REALPART_EXPR, tem, 0)),
- truthvalue_conversion (build_unary_op (IMAGPART_EXPR, tem, 0)),
+ c_common_truthvalue_conversion (build_unary_op (REALPART_EXPR, t, 0)),
+ c_common_truthvalue_conversion (build_unary_op (IMAGPART_EXPR, t, 0)),
0));
}
variant as canonical. */
if (TREE_CODE (t) == INTEGER_TYPE && TREE_UNSIGNED (t))
{
- tree t1 = signed_type (t);
+ tree t1 = c_common_signed_type (t);
/* t1 == t can happen for boolean nodes which are always unsigned. */
if (t1 != t)
return fold (build1 (NOP_EXPR, c_size_type_node, t));
}
\f
-/* Give the specifications for the format attributes, used by C and all
- descendents. */
-
-static const struct attribute_spec c_format_attribute_table[] =
-{
- /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */
- { "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 }
-};
-
/* Build tree nodes and builtin functions common to both C and C++ language
frontends. */
tree va_list_ref_type_node;
tree va_list_arg_type_node;
- /* We must initialize this before any builtin functions (which might have
- attributes) are declared. (c_common_init is too late.) */
- format_attribute_table = c_format_attribute_table;
-
/* Define `int' and `char' first so that dbx will output them first. */
record_builtin_type (RID_INT, NULL, integer_type_node);
record_builtin_type (RID_CHAR, "char", char_type_node);
and this must agree, even if long and int are the same size. */
c_size_type_node =
TREE_TYPE (identifier_global_value (get_identifier (SIZE_TYPE)));
- signed_size_type_node = signed_type (c_size_type_node);
+ signed_size_type_node = c_common_signed_type (c_size_type_node);
set_sizetype (c_size_type_node);
build_common_tree_nodes_2 (flag_short_double);
(build_decl (TYPE_DECL, get_identifier ("complex long double"),
complex_long_double_type_node));
+ /* Types which are common to the fortran compiler and libf2c. When
+ changing these, you also need to be concerned with f/com.h. */
+
+ if (TYPE_PRECISION (float_type_node)
+ == TYPE_PRECISION (long_integer_type_node))
+ {
+ g77_integer_type_node = long_integer_type_node;
+ g77_uinteger_type_node = long_unsigned_type_node;
+ }
+ else if (TYPE_PRECISION (float_type_node)
+ == TYPE_PRECISION (integer_type_node))
+ {
+ g77_integer_type_node = integer_type_node;
+ g77_uinteger_type_node = unsigned_type_node;
+ }
+ else
+ g77_integer_type_node = g77_uinteger_type_node = NULL_TREE;
+
+ if (g77_integer_type_node != NULL_TREE)
+ {
+ (*lang_hooks.decls.pushdecl) (build_decl (TYPE_DECL,
+ get_identifier ("__g77_integer"),
+ g77_integer_type_node));
+ (*lang_hooks.decls.pushdecl) (build_decl (TYPE_DECL,
+ get_identifier ("__g77_uinteger"),
+ g77_uinteger_type_node));
+ }
+
+ if (TYPE_PRECISION (float_type_node) * 2
+ == TYPE_PRECISION (long_integer_type_node))
+ {
+ g77_longint_type_node = long_integer_type_node;
+ g77_ulongint_type_node = long_unsigned_type_node;
+ }
+ else if (TYPE_PRECISION (float_type_node) * 2
+ == TYPE_PRECISION (long_long_integer_type_node))
+ {
+ g77_longint_type_node = long_long_integer_type_node;
+ g77_ulongint_type_node = long_long_unsigned_type_node;
+ }
+ else
+ g77_longint_type_node = g77_ulongint_type_node = NULL_TREE;
+
+ if (g77_longint_type_node != NULL_TREE)
+ {
+ (*lang_hooks.decls.pushdecl) (build_decl (TYPE_DECL,
+ get_identifier ("__g77_longint"),
+ g77_longint_type_node));
+ (*lang_hooks.decls.pushdecl) (build_decl (TYPE_DECL,
+ get_identifier ("__g77_ulongint"),
+ g77_ulongint_type_node));
+ }
+
record_builtin_type (RID_VOID, NULL, void_type_node);
void_zero_node = build_int_2 (0, 0);
(*targetm.init_builtins) ();
/* This is special for C++ so functions can be overloaded. */
- wchar_type_node = get_identifier (flag_short_wchar
- ? "short unsigned int"
- : WCHAR_TYPE);
+ 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_language == clk_cplusplus)
}
else
{
- signed_wchar_type_node = signed_type (wchar_type_node);
- unsigned_wchar_type_node = unsigned_type (wchar_type_node);
+ signed_wchar_type_node = c_common_signed_type (wchar_type_node);
+ unsigned_wchar_type_node = c_common_unsigned_type (wchar_type_node);
}
/* This is for wide string constants. */
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 = unsigned_type (ptrdiff_type_node);
+ unsigned_ptrdiff_type_node = c_common_unsigned_type (ptrdiff_type_node);
(*lang_hooks.decls.pushdecl)
(build_decl (TYPE_DECL, get_identifier ("__builtin_va_list"),
0, NOT_BUILT_IN, 0, 0, 1);
main_identifier_node = get_identifier ("main");
-
- /* ??? Perhaps there's a better place to do this. But it is related
- to __builtin_va_arg, so it isn't that off-the-wall. */
- lang_type_promotes_to = simple_type_promotes_to;
}
tree
}
}
-/* Given a type, apply default promotions wrt unnamed function arguments
- and return the new type. Return NULL_TREE if no change. */
-/* ??? There is a function of the same name in the C++ front end that
- does something similar, but is more thorough and does not return NULL
- if no change. We could perhaps share code, but it would make the
- self_promoting_type property harder to identify. */
-
-tree
-simple_type_promotes_to (type)
- tree type;
-{
- if (TYPE_MAIN_VARIANT (type) == float_type_node)
- return double_type_node;
-
- if (c_promoting_integer_type_p (type))
- {
- /* Preserve unsignedness if not really getting any wider. */
- if (TREE_UNSIGNED (type)
- && (TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node)))
- return unsigned_type_node;
- return integer_type_node;
- }
-
- return NULL_TREE;
-}
-
/* Return 1 if PARMS specifies a fixed number of parameters
and none of their types is affected by default promotions. */
out-of-scope after the first EXPR_STMT from within the
STMT_EXPR. */
push_temp_slots ();
- rtl_expr = expand_start_stmt_expr ();
+ rtl_expr = expand_start_stmt_expr (!STMT_EXPR_NO_SCOPE (exp));
/* If we want the result of this expression, find the last
EXPR_STMT in the COMPOUND_STMT and mark it as addressable. */
preserve_temp_slots (result);
}
+ /* If the statment-expression does not have a scope, then the
+ new temporaries we created within it must live beyond the
+ statement-expression. */
+ if (STMT_EXPR_NO_SCOPE (exp))
+ preserve_temp_slots (NULL_RTX);
+
pop_temp_slots ();
return result;
}
memcpy (newstr, TREE_STRING_POINTER (stripped_string), newlen - 1);
newstr[newlen - 1] = 0;
- arglist = combine_strings (build_string (newlen, newstr));
+ arglist = fix_string_type (build_string (newlen, newstr));
arglist = build_tree_list (NULL_TREE, arglist);
fn = fn_puts;
}
enum c_language_kind lang;
{
c_language = lang;
- parse_in = cpp_create_reader (lang == clk_c ? CLK_GNUC89:
- lang == clk_cplusplus ? CLK_GNUCXX: CLK_OBJC);
+ parse_in = cpp_create_reader (lang == clk_c || lang == clk_objective_c
+ ? CLK_GNUC89 : CLK_GNUCXX);
+ if (lang == clk_objective_c)
+ cpp_get_options (parse_in)->objc = 1;
/* Mark as "unspecified" (see c_common_post_options). */
flag_bounds_check = -1;
{
cpp_post_options (parse_in);
- /* Save no-inline information we may clobber below. */
- flag_really_no_inline = flag_no_inline;
-
flag_inline_trees = 1;
/* Use tree inlining if possible. Function instrumentation is only
warning ("-Wformat-y2k ignored without -Wformat");
if (warn_format_extra_args && !warn_format)
warning ("-Wformat-extra-args ignored without -Wformat");
+ if (warn_format_zero_length && !warn_format)
+ warning ("-Wformat-zero-length ignored without -Wformat");
if (warn_format_nonliteral && !warn_format)
warning ("-Wformat-nonliteral ignored without -Wformat");
if (warn_format_security && !warn_format)
warning ("-Wformat-security ignored without -Wformat");
if (warn_missing_format_attribute && !warn_format)
warning ("-Wmissing-format-attribute ignored without -Wformat");
+
+ /* If an error has occurred in cpplib, note it so we fail
+ immediately. */
+ errorcount += cpp_errors (parse_in);
+}
+
+/* Hook that registers front end and target-specific built-ins. */
+static void
+cb_register_builtins (pfile)
+ cpp_reader *pfile;
+{
+ /* -undef turns off target-specific built-ins. */
+ if (flag_undef)
+ return;
+
+ if (c_language == clk_cplusplus)
+ {
+ if (SUPPORTS_ONE_ONLY)
+ cpp_define (pfile, "__GXX_WEAK__=1");
+ else
+ cpp_define (pfile, "__GXX_WEAK__=0");
+ }
+
+ /* libgcc needs to know this. */
+ if (USING_SJLJ_EXCEPTIONS)
+ cpp_define (pfile, "__USING_SJLJ_EXCEPTIONS__");
+
+ /* stddef.h needs to know these. */
+ 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);
+
+ /* For use in assembly language. */
+ builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0);
+ builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0);
+
+ /* Misc. */
+ builtin_define_with_value ("__VERSION__", version_string, 1);
+
+ /* Other target-independent built-ins determined by command-line
+ options. */
+ if (optimize_size)
+ cpp_define (pfile, "__OPTIMIZE_SIZE__");
+ if (optimize)
+ cpp_define (pfile, "__OPTIMIZE__");
+
+ if (flag_hosted)
+ cpp_define (pfile, "__STDC_HOSTED__=1");
+ else
+ cpp_define (pfile, "__STDC_HOSTED__=0");
+
+ if (fast_math_flags_set_p ())
+ cpp_define (pfile, "__FAST_MATH__");
+ if (flag_no_inline)
+ cpp_define (pfile, "__NO_INLINE__");
+
+ if (flag_iso)
+ cpp_define (pfile, "__STRICT_ANSI__");
+
+ if (!flag_signed_char)
+ cpp_define (pfile, "__CHAR_UNSIGNED__");
+
+ /* A straightforward target hook doesn't work, because of problems
+ linking that hook's body when part of non-C front ends. */
+# define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM)
+# define builtin_define(TXT) cpp_define (pfile, TXT)
+# define builtin_assert(TXT) cpp_assert (pfile, TXT)
+ TARGET_CPU_CPP_BUILTINS ();
+ TARGET_OS_CPP_BUILTINS ();
+}
+
+/* Pass an object-like macro. If it doesn't lie in the user's
+ namespace, defines it unconditionally. Otherwise define a version
+ with two leading underscores, and another version with two leading
+ and trailing underscores, and define the original only if an ISO
+ standard was not nominated.
+
+ e.g. passing "unix" defines "__unix", "__unix__" and possibly
+ "unix". Passing "_mips" defines "__mips", "__mips__" and possibly
+ "_mips". */
+void
+builtin_define_std (macro)
+ const char *macro;
+{
+ size_t len = strlen (macro);
+ char *buff = alloca (len + 5);
+ char *p = buff + 2;
+ char *q = p + len;
+
+ /* prepend __ (or maybe just _) if in user's namespace. */
+ memcpy (p, macro, len + 1);
+ if (*p != '_')
+ *--p = '_';
+ if (p[1] != '_' && !ISUPPER (p[1]))
+ *--p = '_';
+ cpp_define (parse_in, p);
+
+ /* If it was in user's namespace... */
+ if (p != buff + 2)
+ {
+ /* Define the macro with leading and following __. */
+ if (q[-1] != '_')
+ *q++ = '_';
+ if (q[-2] != '_')
+ *q++ = '_';
+ *q = '\0';
+ cpp_define (parse_in, p);
+
+ /* Finally, define the original macro if permitted. */
+ if (!flag_iso)
+ cpp_define (parse_in, macro);
+ }
+}
+
+/* Pass an object-like macro and a value to define it to. The third
+ parameter says whether or not to turn the value into a string
+ constant. */
+static void
+builtin_define_with_value (macro, expansion, is_str)
+ const char *macro;
+ const char *expansion;
+ int is_str;
+{
+ char *buf;
+ size_t mlen = strlen (macro);
+ size_t elen = strlen (expansion);
+ size_t extra = 2; /* space for an = and a NUL */
+
+ if (is_str)
+ extra += 2; /* space for two quote marks */
+
+ buf = alloca (mlen + elen + extra);
+ if (is_str)
+ sprintf (buf, "%s=\"%s\"", macro, expansion);
+ else
+ sprintf (buf, "%s=%s", macro, expansion);
+
+ cpp_define (parse_in, buf);
}
/* Front end initialization common to C, ObjC and C++. */
c_common_init (filename)
const char *filename;
{
+ cpp_options *options = cpp_get_options (parse_in);
+
+ /* Set up preprocessor arithmetic. Must be done after call to
+ c_common_nodes_and_builtins for wchar_type_node to be good. */
+ options->precision = TYPE_PRECISION (intmax_type_node);
+ options->char_precision = TYPE_PRECISION (char_type_node);
+ options->int_precision = TYPE_PRECISION (integer_type_node);
+ options->wchar_precision = TYPE_PRECISION (wchar_type_node);
+ options->unsigned_wchar = TREE_UNSIGNED (wchar_type_node);
+ options->unsigned_char = !flag_signed_char;
+ options->warn_multichar = warn_multichar;
+ options->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
+
+ /* Register preprocessor built-ins before calls to
+ cpp_main_file. */
+ cpp_get_callbacks (parse_in)->register_builtins = cb_register_builtins;
+
/* NULL is passed up to toplev.c and we exit quickly. */
if (flag_preprocess_only)
{
"shadowed declaration is here");
}
+/* Attribute handlers common to C front ends. */
+
+/* Handle a "packed" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_packed_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags;
+ bool *no_add_attrs;
+{
+ tree *type = NULL;
+ if (DECL_P (*node))
+ {
+ if (TREE_CODE (*node) == TYPE_DECL)
+ type = &TREE_TYPE (*node);
+ }
+ else
+ type = node;
+
+ if (type)
+ {
+ if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
+ *type = build_type_copy (*type);
+ TYPE_PACKED (*type) = 1;
+ }
+ else if (TREE_CODE (*node) == FIELD_DECL)
+ DECL_PACKED (*node) = 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));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "nocommon" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_nocommon_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ if (TREE_CODE (*node) == VAR_DECL)
+ DECL_COMMON (*node) = 0;
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "common" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_common_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ if (TREE_CODE (*node) == VAR_DECL)
+ DECL_COMMON (*node) = 1;
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "noreturn" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_noreturn_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ tree type = TREE_TYPE (*node);
+
+ /* See FIXME comment in c_common_attribute_table. */
+ 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),
+ TREE_READONLY (TREE_TYPE (type)), 1));
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "noinline" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_noinline_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ if (TREE_CODE (*node) == FUNCTION_DECL)
+ DECL_UNINLINABLE (*node) = 1;
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "always_inline" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_always_inline_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ if (TREE_CODE (*node) == FUNCTION_DECL)
+ {
+ /* Do nothing else, just set the attribute. We'll get at
+ it later with lookup_attribute. */
+ }
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "used" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_used_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ if (TREE_CODE (*node) == FUNCTION_DECL)
+ TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (*node))
+ = TREE_USED (*node) = 1;
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "unused" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_unused_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ 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 ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+ }
+ else
+ {
+ if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
+ *node = build_type_copy (*node);
+ TREE_USED (*node) = 1;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "const" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_const_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ tree type = TREE_TYPE (*node);
+
+ /* See FIXME comment on noreturn in c_common_attribute_table. */
+ 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 ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "transparent_union" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_transparent_union_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ 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_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 ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "constructor" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_constructor_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ 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 ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "destructor" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_destructor_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ 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 ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "mode" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_mode_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ tree type = *node;
+
+ *no_add_attrs = true;
+
+ if (TREE_CODE (TREE_VALUE (args)) != IDENTIFIER_NODE)
+ warning ("`%s' 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;
+
+ 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;
+ }
+
+ /* Change this type to have 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 = (*lang_hooks.types.type_for_mode)
+ (mode, TREE_UNSIGNED (type))))
+ error ("no data type for mode `%s'", p);
+ else
+ *node = typefm;
+ /* No need to layout the type here. The caller should do this. */
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "section" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_section_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name ATTRIBUTE_UNUSED;
+ tree args;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ tree decl = *node;
+
+ if (targetm.have_named_sections)
+ {
+ 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");
+ *no_add_attrs = true;
+ }
+
+ /* 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");
+ *no_add_attrs = true;
+ }
+ else
+ DECL_SECTION_NAME (decl) = TREE_VALUE (args);
+ }
+ else
+ {
+ error_with_decl (*node,
+ "section attribute not allowed for `%s'");
+ *no_add_attrs = true;
+ }
+ }
+ else
+ {
+ error_with_decl (*node,
+ "section attributes are not supported for this target");
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "aligned" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_aligned_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name ATTRIBUTE_UNUSED;
+ 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;
+
+ /* 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");
+ *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 we have a TYPE_DECL, then copy the type, so that we
+ don't accidentally modify a builtin type. See pushdecl. */
+ if (decl && TREE_TYPE (decl) != error_mark_node
+ && DECL_ORIGINAL_TYPE (decl) == NULL_TREE)
+ {
+ tree tt = TREE_TYPE (decl);
+ *type = build_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_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_with_decl (decl,
+ "alignment may not be specified for `%s'");
+ *no_add_attrs = true;
+ }
+ else
+ {
+ DECL_ALIGN (decl) = (1 << i) * BITS_PER_UNIT;
+ DECL_USER_ALIGN (decl) = 1;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "weak" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_weak_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name ATTRIBUTE_UNUSED;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs ATTRIBUTE_UNUSED;
+{
+ declare_weak (*node);
+
+ return NULL_TREE;
+}
+
+/* Handle an "alias" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_alias_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args;
+ int flags ATTRIBUTE_UNUSED;
+ 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_with_decl (decl,
+ "`%s' defined both normally and as an alias");
+ *no_add_attrs = true;
+ }
+ else if (decl_function_context (decl) == 0)
+ {
+ 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));
+ /* This counts as a use of the object pointed to. */
+ TREE_USED (id) = 1;
+
+ if (TREE_CODE (decl) == FUNCTION_DECL)
+ DECL_INITIAL (decl) = error_mark_node;
+ else
+ DECL_EXTERNAL (decl) = 0;
+ }
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle an "visibility" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_visibility_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ tree decl = *node;
+
+ if (decl_function_context (decl) != 0 || ! TREE_PUBLIC (decl))
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+ else
+ {
+ tree id;
+
+ id = TREE_VALUE (args);
+ if (TREE_CODE (id) != STRING_CST)
+ {
+ error ("visibility arg not a string");
+ *no_add_attrs = true;
+ return NULL_TREE;
+ }
+ if (strcmp (TREE_STRING_POINTER (id), "hidden")
+ && strcmp (TREE_STRING_POINTER (id), "protected")
+ && strcmp (TREE_STRING_POINTER (id), "internal"))
+ {
+ error ("visibility arg must be one of \"hidden\", \"protected\" or \"internal\"");
+ *no_add_attrs = true;
+ return NULL_TREE;
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "no_instrument_function" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_no_instrument_function_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ tree decl = *node;
+
+ if (TREE_CODE (decl) != FUNCTION_DECL)
+ {
+ error_with_decl (decl,
+ "`%s' attribute applies only to functions",
+ IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+ else if (DECL_INITIAL (decl))
+ {
+ error_with_decl (decl,
+ "can't set `%s' attribute after definition",
+ IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+ else
+ DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1;
+
+ return NULL_TREE;
+}
+
+/* Handle a "malloc" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_malloc_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ if (TREE_CODE (*node) == FUNCTION_DECL)
+ DECL_IS_MALLOC (*node) = 1;
+ /* ??? TODO: Support types. */
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "no_limit_stack" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_no_limit_stack_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ tree decl = *node;
+
+ if (TREE_CODE (decl) != FUNCTION_DECL)
+ {
+ error_with_decl (decl,
+ "`%s' attribute applies only to functions",
+ IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+ else if (DECL_INITIAL (decl))
+ {
+ error_with_decl (decl,
+ "can't set `%s' attribute after definition",
+ IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+ else
+ DECL_NO_LIMIT_STACK (decl) = 1;
+
+ return NULL_TREE;
+}
+
+/* Handle a "pure" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_pure_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ if (TREE_CODE (*node) == FUNCTION_DECL)
+ DECL_IS_PURE (*node) = 1;
+ /* ??? TODO: Support types. */
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+
+/* Handle a "deprecated" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_deprecated_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ 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_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 ("`%s' attribute ignored for `%s'",
+ IDENTIFIER_POINTER (name), what);
+ else
+ warning ("`%s' attribute ignored",
+ IDENTIFIER_POINTER (name));
+ }
+
+ return NULL_TREE;
+}
+
+/* Keep a list of vector type nodes we created in handle_vector_size_attribute,
+ to prevent us from duplicating type nodes unnecessarily.
+ The normal mechanism to prevent duplicates is to use type_hash_canon, but
+ since we want to distinguish types that are essentially identical (except
+ for their debug representation), we use a local list here. */
+static tree vector_type_node_list = 0;
+
+/* Handle a "vector_size" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_vector_size_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ unsigned HOST_WIDE_INT vecsize, nunits;
+ enum machine_mode mode, orig_mode, new_mode;
+ tree type = *node, new_type = NULL_TREE;
+ tree type_list_node;
+
+ *no_add_attrs = true;
+
+ if (! host_integerp (TREE_VALUE (args), 1))
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ return NULL_TREE;
+ }
+
+ /* Get the vector size (in bytes). */
+ vecsize = tree_low_cst (TREE_VALUE (args), 1);
+
+ /* We need to provide for vector pointers, vector arrays, and
+ functions returning vectors. For example:
+
+ __attribute__((vector_size(16))) short *foo;
+
+ In this case, the mode is SI, but the type being modified is
+ HI, so we need to look further. */
+
+ while (POINTER_TYPE_P (type)
+ || TREE_CODE (type) == FUNCTION_TYPE
+ || TREE_CODE (type) == ARRAY_TYPE)
+ type = TREE_TYPE (type);
+
+ /* Get the mode of the type being modified. */
+ 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 `%s'",
+ IDENTIFIER_POINTER (name));
+ return NULL_TREE;
+ }
+
+ /* Calculate how many units fit in the vector. */
+ nunits = vecsize / tree_low_cst (TYPE_SIZE_UNIT (type), 1);
+
+ /* Find a suitably sized vector. */
+ new_mode = VOIDmode;
+ for (mode = GET_CLASS_NARROWEST_MODE (GET_MODE_CLASS (orig_mode) == MODE_INT
+ ? MODE_VECTOR_INT
+ : MODE_VECTOR_FLOAT);
+ mode != VOIDmode;
+ mode = GET_MODE_WIDER_MODE (mode))
+ if (vecsize == GET_MODE_SIZE (mode)
+ && nunits == (unsigned HOST_WIDE_INT) GET_MODE_NUNITS (mode))
+ {
+ new_mode = mode;
+ break;
+ }
+
+ if (new_mode == VOIDmode)
+ {
+ error ("no vector mode with the size and type specified could be found");
+ return NULL_TREE;
+ }
+
+ for (type_list_node = vector_type_node_list; type_list_node;
+ type_list_node = TREE_CHAIN (type_list_node))
+ {
+ tree other_type = TREE_VALUE (type_list_node);
+ tree record = TYPE_DEBUG_REPRESENTATION_TYPE (other_type);
+ tree fields = TYPE_FIELDS (record);
+ tree field_type = TREE_TYPE (fields);
+ tree array_type = TREE_TYPE (field_type);
+ if (TREE_CODE (fields) != FIELD_DECL
+ || TREE_CODE (field_type) != ARRAY_TYPE)
+ abort ();
+
+ if (TYPE_MODE (other_type) == mode && type == array_type)
+ {
+ new_type = other_type;
+ break;
+ }
+ }
+
+ if (new_type == NULL_TREE)
+ {
+ tree index, array, rt, list_node;
+
+ new_type = (*lang_hooks.types.type_for_mode) (new_mode,
+ TREE_UNSIGNED (type));
+
+ if (!new_type)
+ {
+ error ("no vector mode with the size and type specified could be found");
+ return NULL_TREE;
+ }
+
+ new_type = build_type_copy (new_type);
+
+ /* Set the debug information here, because this is the only
+ place where we know the underlying type for a vector made
+ with vector_size. For debugging purposes we pretend a vector
+ is an array within a structure. */
+ index = build_int_2 (TYPE_VECTOR_SUBPARTS (new_type) - 1, 0);
+ array = build_array_type (type, build_index_type (index));
+ rt = make_node (RECORD_TYPE);
+
+ TYPE_FIELDS (rt) = build_decl (FIELD_DECL, get_identifier ("f"), array);
+ DECL_CONTEXT (TYPE_FIELDS (rt)) = rt;
+ layout_type (rt);
+ TYPE_DEBUG_REPRESENTATION_TYPE (new_type) = rt;
+
+ list_node = build_tree_list (NULL, new_type);
+ TREE_CHAIN (list_node) = vector_type_node_list;
+ vector_type_node_list = list_node;
+ }
+
+ /* Build back pointers if needed. */
+ *node = vector_size_helper (*node, new_type);
+
+ return NULL_TREE;
+}
+
+/* HACK. GROSS. This is absolutely disgusting. I wish there was a
+ better way.
+
+ If we requested a pointer to a vector, build up the pointers that
+ we stripped off while looking for the inner type. Similarly for
+ return values from functions.
+
+ The argument "type" is the top of the chain, and "bottom" is the
+ new type which we will point to. */
+
+static tree
+vector_size_helper (type, bottom)
+ tree type, bottom;
+{
+ tree inner, outer;
+
+ if (POINTER_TYPE_P (type))
+ {
+ inner = vector_size_helper (TREE_TYPE (type), bottom);
+ outer = build_pointer_type (inner);
+ }
+ else if (TREE_CODE (type) == ARRAY_TYPE)
+ {
+ inner = vector_size_helper (TREE_TYPE (type), bottom);
+ outer = build_array_type (inner, TYPE_VALUES (type));
+ }
+ else if (TREE_CODE (type) == FUNCTION_TYPE)
+ {
+ inner = vector_size_helper (TREE_TYPE (type), bottom);
+ outer = build_function_type (inner, TYPE_VALUES (type));
+ }
+ else
+ return bottom;
+
+ TREE_READONLY (outer) = TREE_READONLY (type);
+ TREE_THIS_VOLATILE (outer) = TREE_THIS_VOLATILE (type);
+
+ return outer;
+}
+
+/* Handle the "nonnull" attribute. */
+static tree
+handle_nonnull_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name ATTRIBUTE_UNUSED;
+ tree args;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ tree type = *node;
+ unsigned HOST_WIDE_INT attr_arg_num;
+
+ /* If no arguments are specified, all pointer arguments should be
+ non-null. Veryify a full prototype is given so that the arguments
+ will have the correct types when we actually check them later. */
+ if (! args)
+ {
+ if (! TYPE_ARG_TYPES (type))
+ {
+ error ("nonnull attribute without arguments on a non-prototype");
+ *no_add_attrs = true;
+ }
+ return NULL_TREE;
+ }
+
+ /* Argument list specified. Verify that each argument number references
+ a pointer argument. */
+ for (attr_arg_num = 1; args; args = TREE_CHAIN (args))
+ {
+ tree argument;
+ unsigned HOST_WIDE_INT arg_num, 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;
+}
+
+/* Check the argument list of a function call for null in argument slots
+ that are marked as requiring a non-null pointer argument. */
+
+static void
+check_function_nonnull (attrs, params)
+ 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);
+
+ /* Walk the argument list. If we encounter an argument number we
+ should check for non-null, do it. If the attribute has no args,
+ then every pointer argument is checked (in which case the check
+ for pointer type is done in check_nonnull_arg). */
+ 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);
+ }
+ }
+ }
+}
+
+/* Helper for check_function_nonnull; given a list of operands which
+ must be non-null in ARGS, determine if operand PARAM_NUM should be
+ checked. */
+
+static bool
+nonnull_check_p (args, param_num)
+ tree args;
+ unsigned HOST_WIDE_INT param_num;
+{
+ unsigned HOST_WIDE_INT arg_num;
+
+ for (; args; args = TREE_CHAIN (args))
+ {
+ if (! get_nonnull_operand (TREE_VALUE (args), &arg_num))
+ abort ();
+
+ if (arg_num == param_num)
+ return true;
+ }
+ return false;
+}
+
+/* Check that the function argument PARAM (which is operand number
+ PARAM_NUM) is non-null. This is called by check_function_nonnull
+ via check_function_arguments_recurse. */
+
+static void
+check_nonnull_arg (ctx, param, param_num)
+ void *ctx ATTRIBUTE_UNUSED;
+ tree param;
+ unsigned HOST_WIDE_INT param_num;
+{
+ /* Just skip checking the argument if it's not a pointer. This can
+ happen if the "nonnull" attribute was given without an operand
+ list (which means to check every pointer argument). */
+
+ 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);
+}
+
+/* Helper for nonnull attribute handling; fetch the operand number
+ from the attribute argument list. */
+
+static bool
+get_nonnull_operand (arg_num_expr, valp)
+ tree arg_num_expr;
+ unsigned HOST_WIDE_INT *valp;
+{
+ /* Strip any conversions from the arg number and verify they
+ are constants. */
+ 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;
+}
+
+/* Handle a "nothrow" attribute; arguments as in
+ struct attribute_spec.handler. */
+
+static tree
+handle_nothrow_attribute (node, name, args, flags, no_add_attrs)
+ tree *node;
+ tree name;
+ tree args ATTRIBUTE_UNUSED;
+ int flags ATTRIBUTE_UNUSED;
+ bool *no_add_attrs;
+{
+ if (TREE_CODE (*node) == FUNCTION_DECL)
+ TREE_NOTHROW (*node) = 1;
+ /* ??? TODO: Support types. */
+ else
+ {
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ *no_add_attrs = true;
+ }
+
+ return NULL_TREE;
+}
+\f
+/* Check for valid arguments being passed to a function. */
+void
+check_function_arguments (attrs, params)
+ tree attrs;
+ tree params;
+{
+ /* Check for null being passed in a pointer argument that must be
+ non-null. We also need to do this if format checking is enabled. */
+
+ if (warn_nonnull)
+ check_function_nonnull (attrs, params);
+
+ /* Check for errors in format strings. */
+
+ if (warn_format)
+ check_function_format (NULL, attrs, params);
+}
+
+/* Generic argument checking recursion routine. PARAM is the argument to
+ be checked. PARAM_NUM is the number of the argument. CALLBACK is invoked
+ once the argument is resolved. CTX is context for the callback. */
+void
+check_function_arguments_recurse (callback, ctx, param, param_num)
+ void (*callback) PARAMS ((void *, tree, unsigned HOST_WIDE_INT));
+ void *ctx;
+ tree param;
+ unsigned HOST_WIDE_INT param_num;
+{
+ if (TREE_CODE (param) == NOP_EXPR)
+ {
+ /* Strip coercion. */
+ 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;
+
+ /* See if this is a call to a known internationalization function
+ that modifies a format arg. Such a function may have multiple
+ format_arg attributes (for example, ngettext). */
+
+ 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;
+
+ /* Extract the argument number, which was previously checked
+ to be valid. */
+ 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);
+
+ if (TREE_CODE (format_num_expr) != INTEGER_CST
+ || TREE_INT_CST_HIGH (format_num_expr) != 0)
+ abort ();
+
+ 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 we found a format_arg attribute and did a recursive check,
+ we are done with checking this argument. Otherwise, we continue
+ and this will be considered a non-literal. */
+ if (found_format_arg)
+ return;
+ }
+
+ if (TREE_CODE (param) == COND_EXPR)
+ {
+ /* Check both halves of the conditional expression. */
+ 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);
+}