tree-ssa-math-opts.c (find_bswap_or_nop_load): Check return value of init_symbolic_number ().

2014-06-09  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * tree-ssa-math-opts.c (find_bswap_or_nop_load): Check return value of
    init_symbolic_number ().

From-SVN: r211395

gcc/ChangeLog

+2014-06-09  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	* tree-ssa-math-opts.c (find_bswap_or_nop_load): Check return value of
+	init_symbolic_number ().
+
 2014-05-18  John David Anglin  <danglin@gcc.gnu.org>
 
 	PR middle-end/61141

gcc/tree-ssa-math-opts.c

@@ -1784,7 +1784,8 @@ find_bswap_or_nop_load (gimple stmt, tree ref, struct symbolic_number *n)
   if (bitsize % BITS_PER_UNIT)
     return false;
 
-  init_symbolic_number (n, ref);
+  if (!init_symbolic_number (n, ref))
+    return false;
   n->base_addr = base_addr;
   n->offset = offset;
   n->bytepos = bitpos / BITS_PER_UNIT;