2015-04-27 Eric Botcazou <ebotcazou@adacore.com>
+ * stor-layout.c (self_referential_component_ref_p): New predicate.
+ (copy_self_referential_tree_r): Use it.
+ (self_referential_size): Punt for simple operations directly involving
+ self-referential component references.
+ * tree-cfg.c (dump_function_to_file): Add missing final curly bracket.
+
+2015-04-27 Eric Botcazou <ebotcazou@adacore.com>
+
* ipa-icf.c (icf_handled_component_p): Remove redundant tests.
2015-04-27 Richard Sandiford <richard.sandiford@arm.com>
/* An array of functions used for self-referential size computation. */
static GTY(()) vec<tree, va_gc> *size_functions;
+/* Return true if T is a self-referential component reference. */
+
+static bool
+self_referential_component_ref_p (tree t)
+{
+ if (TREE_CODE (t) != COMPONENT_REF)
+ return false;
+
+ while (REFERENCE_CLASS_P (t))
+ t = TREE_OPERAND (t, 0);
+
+ return (TREE_CODE (t) == PLACEHOLDER_EXPR);
+}
+
/* Similar to copy_tree_r but do not copy component references involving
PLACEHOLDER_EXPRs. These nodes are spotted in find_placeholder_in_expr
and substituted in substitute_in_expr. */
}
/* Default case: the component reference. */
- else if (code == COMPONENT_REF)
+ else if (self_referential_component_ref_p (*tp))
{
- tree inner;
- for (inner = TREE_OPERAND (*tp, 0);
- REFERENCE_CLASS_P (inner);
- inner = TREE_OPERAND (inner, 0))
- ;
-
- if (TREE_CODE (inner) == PLACEHOLDER_EXPR)
- {
- *walk_subtrees = 0;
- return NULL_TREE;
- }
+ *walk_subtrees = 0;
+ return NULL_TREE;
}
/* We're not supposed to have them in self-referential size trees
/* Do not factor out simple operations. */
t = skip_simple_constant_arithmetic (size);
- if (TREE_CODE (t) == CALL_EXPR)
+ if (TREE_CODE (t) == CALL_EXPR || self_referential_component_ref_p (t))
return size;
/* Collect the list of self-references in the expression. */