static bool arm_cxx_class_data_always_comdat (void);
static bool arm_cxx_use_aeabi_atexit (void);
static void arm_init_libfuncs (void);
+static tree arm_build_builtin_va_list (void);
+static void arm_expand_builtin_va_start (tree, rtx);
+static tree arm_gimplify_va_arg_expr (tree, tree, tree *, tree *);
static bool arm_handle_option (size_t, const char *, int);
static void arm_target_help (void);
static unsigned HOST_WIDE_INT arm_shift_truncation_mask (enum machine_mode);
#undef TARGET_MANGLE_TYPE
#define TARGET_MANGLE_TYPE arm_mangle_type
+#undef TARGET_BUILD_BUILTIN_VA_LIST
+#define TARGET_BUILD_BUILTIN_VA_LIST arm_build_builtin_va_list
+#undef TARGET_EXPAND_BUILTIN_VA_START
+#define TARGET_EXPAND_BUILTIN_VA_START arm_expand_builtin_va_start
+#undef TARGET_GIMPLIFY_VA_ARG_EXPR
+#define TARGET_GIMPLIFY_VA_ARG_EXPR arm_gimplify_va_arg_expr
+
#ifdef HAVE_AS_TLS
#undef TARGET_ASM_OUTPUT_DWARF_DTPREL
#define TARGET_ASM_OUTPUT_DWARF_DTPREL arm_output_dwarf_dtprel
set_optab_libfunc (umod_optab, SImode, NULL);
}
+/* On AAPCS systems, this is the "struct __va_list". */
+static GTY(()) tree va_list_type;
+
+/* Return the type to use as __builtin_va_list. */
+static tree
+arm_build_builtin_va_list (void)
+{
+ tree va_list_name;
+ tree ap_field;
+
+ if (!TARGET_AAPCS_BASED)
+ return std_build_builtin_va_list ();
+
+ /* AAPCS \S 7.1.4 requires that va_list be a typedef for a type
+ defined as:
+
+ struct __va_list
+ {
+ void *__ap;
+ };
+
+ The C Library ABI further reinforces this definition in \S
+ 4.1.
+
+ We must follow this definition exactly. The structure tag
+ name is visible in C++ mangled names, and thus forms a part
+ of the ABI. The field name may be used by people who
+ #include <stdarg.h>. */
+ /* Create the type. */
+ va_list_type = lang_hooks.types.make_type (RECORD_TYPE);
+ /* Give it the required name. */
+ va_list_name = build_decl (TYPE_DECL,
+ get_identifier ("__va_list"),
+ va_list_type);
+ DECL_ARTIFICIAL (va_list_name) = 1;
+ TYPE_NAME (va_list_type) = va_list_name;
+ /* Create the __ap field. */
+ ap_field = build_decl (FIELD_DECL,
+ get_identifier ("__ap"),
+ ptr_type_node);
+ DECL_ARTIFICIAL (ap_field) = 1;
+ DECL_FIELD_CONTEXT (ap_field) = va_list_type;
+ TYPE_FIELDS (va_list_type) = ap_field;
+ /* Compute its layout. */
+ layout_type (va_list_type);
+
+ return va_list_type;
+}
+
+/* Return an expression of type "void *" pointing to the next
+ available argument in a variable-argument list. VALIST is the
+ user-level va_list object, of type __builtin_va_list. */
+static tree
+arm_extract_valist_ptr (tree valist)
+{
+ if (TREE_TYPE (valist) == error_mark_node)
+ return error_mark_node;
+
+ /* On an AAPCS target, the pointer is stored within "struct
+ va_list". */
+ if (TARGET_AAPCS_BASED)
+ {
+ tree ap_field = TYPE_FIELDS (TREE_TYPE (valist));
+ valist = build3 (COMPONENT_REF, TREE_TYPE (ap_field),
+ valist, ap_field, NULL_TREE);
+ }
+
+ return valist;
+}
+
+/* Implement TARGET_EXPAND_BUILTIN_VA_START. */
+static void
+arm_expand_builtin_va_start (tree valist, rtx nextarg)
+{
+ valist = arm_extract_valist_ptr (valist);
+ std_expand_builtin_va_start (valist, nextarg);
+}
+
+/* Implement TARGET_GIMPLIFY_VA_ARG_EXPR. */
+static tree
+arm_gimplify_va_arg_expr (tree valist, tree type, tree *pre_p,
+ tree *post_p)
+{
+ valist = arm_extract_valist_ptr (valist);
+ return std_gimplify_va_arg_expr (valist, type, pre_p, post_p);
+}
+
/* Implement TARGET_HANDLE_OPTION. */
static bool
{
arm_mangle_map_entry *pos = arm_mangle_map;
+ /* The ARM ABI documents (10th October 2008) say that "__va_list"
+ has to be managled as if it is in the "std" namespace. */
+ if (TARGET_AAPCS_BASED
+ && lang_hooks.types_compatible_p (type, va_list_type))
+ {
+ static bool warned;
+ if (!warned && warn_psabi)
+ {
+ warned = true;
+ inform (input_location,
+ "the mangling of %<va_list%> has changed in GCC 4.4");
+ }
+ return "St9__va_list";
+ }
+
if (TREE_CODE (type) != VECTOR_TYPE)
return NULL;
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