re PR middle-end/42559 (ice in emit_block_move_hints with -O2)

2010-01-01  Richard Guenther  <rguenther@suse.de>

	PR middle-end/42559
	* builtins.c (get_object_alignment): Do not use DECL_ALIGN
	for LABEL_DECLs.

	* gcc.c-torture/compile/pr42559.c: New testcase.

From-SVN: r155554

gcc/ChangeLog

+2010-01-01  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/42559
+	* builtins.c (get_object_alignment): Do not use DECL_ALIGN
+	for LABEL_DECLs.
+
 2009-12-31  Jakub Jelinek  <jakub@redhat.com>
 
 	* tree-dump.c (dump_options): Don't set TDF_NOUID for all.

gcc/builtins.c

@@ -325,7 +325,8 @@ get_object_alignment (tree exp, unsigned int align, unsigned int max_align)
     }
   if (TREE_CODE (exp) == CONST_DECL)
     exp = DECL_INITIAL (exp);
-  if (DECL_P (exp))
+  if (DECL_P (exp)
+      && TREE_CODE (exp) != LABEL_DECL)
     align = MIN (inner, DECL_ALIGN (exp));
 #ifdef CONSTANT_ALIGNMENT
   else if (CONSTANT_CLASS_P (exp))

gcc/testsuite/ChangeLog

+2010-01-01  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/42559
+	* gcc.c-torture/compile/pr42559.c: New testcase.
+
 2009-12-30  Joseph Myers  <joseph@codesourcery.com>
 
 	PR c/42439

gcc/testsuite/gcc.c-torture/compile/pr42559.c

+void jumpfunc(int copy, void *p)
+{
+  void *l = &&jumplabel;
+  if (copy)
+    __builtin___memcpy_chk (p, l, 128, __builtin_object_size (p, 0));
+jumplabel:
+  return;
+}