check_initializer (tree decl, tree init, int flags, tree *cleanup)
{
tree type = TREE_TYPE (decl);
+ tree init_code = NULL;
/* If `start_decl' didn't like having an initialization, ignore it now. */
if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
{
dont_use_constructor:
if (TREE_CODE (init) != TREE_VEC)
- init = store_init_value (decl, init);
+ {
+ init_code = store_init_value (decl, init);
+ init = NULL;
+ }
}
}
else if (DECL_EXTERNAL (decl))
check_for_uninitialized_const_var (decl);
if (init && init != error_mark_node)
- init = build (INIT_EXPR, type, decl, init);
+ init_code = build (INIT_EXPR, type, decl, init);
- return init;
+ return init_code;
}
/* If DECL is not a local variable, give it RTL. */
}
\f
+/* The recursive part of split_nonconstant_init. DEST is an lvalue
+ expression to which INIT should be assigned. INIT is a CONSTRUCTOR.
+ PCODE is a pointer to the tail of a chain of statements being emitted.
+ The return value is the new tail of that chain after new statements
+ are generated. */
+
+static tree *
+split_nonconstant_init_1 (tree dest, tree init, tree *pcode)
+{
+ tree *pelt, elt, type = TREE_TYPE (dest);
+ tree sub, code, inner_type = NULL;
+ bool array_type_p = false;
+
+ pelt = &CONSTRUCTOR_ELTS (init);
+ switch (TREE_CODE (type))
+ {
+ case ARRAY_TYPE:
+ inner_type = TREE_TYPE (type);
+ array_type_p = true;
+ /* FALLTHRU */
+
+ case RECORD_TYPE:
+ case UNION_TYPE:
+ case QUAL_UNION_TYPE:
+ while ((elt = *pelt))
+ {
+ tree field_index = TREE_PURPOSE (elt);
+ tree value = TREE_VALUE (elt);
+
+ if (!array_type_p)
+ inner_type = TREE_TYPE (field_index);
+
+ if (TREE_CODE (value) == CONSTRUCTOR)
+ {
+ if (array_type_p)
+ sub = build (ARRAY_REF, inner_type, dest, field_index);
+ else
+ sub = build (COMPONENT_REF, inner_type, dest, field_index);
+
+ pcode = split_nonconstant_init_1 (sub, value, pcode);
+ }
+ else if (!initializer_constant_valid_p (value, inner_type))
+ {
+ *pelt = TREE_CHAIN (elt);
+
+ if (array_type_p)
+ sub = build (ARRAY_REF, inner_type, dest, field_index);
+ else
+ sub = build (COMPONENT_REF, inner_type, dest, field_index);
+
+ code = build (MODIFY_EXPR, inner_type, sub, value);
+ code = build_stmt (EXPR_STMT, code);
+
+ *pcode = code;
+ pcode = &TREE_CHAIN (code);
+ continue;
+ }
+ pelt = &TREE_CHAIN (elt);
+ }
+ break;
+
+ case VECTOR_TYPE:
+ if (!initializer_constant_valid_p (init, type))
+ {
+ CONSTRUCTOR_ELTS (init) = NULL;
+ code = build (MODIFY_EXPR, type, dest, init);
+ code = build_stmt (EXPR_STMT, code);
+ pcode = &TREE_CHAIN (code);
+ }
+ break;
+
+ default:
+ abort ();
+ }
+
+ return pcode;
+}
+
+/* A subroutine of store_init_value. Splits non-constant static
+ initializer INIT into a constant part and generates code to
+ perform the non-constant part of the initialization to DEST.
+ Returns the code for the runtime init. */
+
+static tree
+split_nonconstant_init (tree dest, tree init)
+{
+ tree code;
+
+ if (TREE_CODE (init) == CONSTRUCTOR)
+ {
+ code = build_stmt (COMPOUND_STMT, NULL_TREE);
+ split_nonconstant_init_1 (dest, init, &COMPOUND_BODY (code));
+ code = build1 (STMT_EXPR, void_type_node, code);
+ TREE_SIDE_EFFECTS (code) = 1;
+ DECL_INITIAL (dest) = init;
+ }
+ else
+ code = build (INIT_EXPR, TREE_TYPE (dest), dest, init);
+
+ return code;
+}
+
/* Perform appropriate conversions on the initial value of a variable,
store it in the declaration DECL,
and print any error messages that are appropriate.
into a CONSTRUCTOR and use standard initialization techniques.
Perhaps a warning should be generated?
- Returns value of initializer if initialization could not be
- performed for static variable. In that case, caller must do
- the storing. */
+ Returns code to be executed if initialization could not be performed
+ for static variable. In that case, caller must emit the code. */
tree
store_init_value (tree decl, tree init)
constructing never make it into DECL_INITIAL, and passes 'init' to
build_aggr_init without checking DECL_INITIAL. So just return. */
else if (TYPE_NEEDS_CONSTRUCTING (type))
- return value;
+ return build (INIT_EXPR, type, decl, value);
else if (TREE_STATIC (decl)
&& (! TREE_CONSTANT (value)
|| ! initializer_constant_valid_p (value, TREE_TYPE (value))))
- return value;
+ return split_nonconstant_init (decl, value);
/* Store the VALUE in DECL_INITIAL. If we're building a
statement-tree we will actually expand the initialization later