store-motion.c (build_store_vectors): Clear regs_set_in_block at the start of a…

store-motion.c (build_store_vectors): Clear regs_set_in_block at the start of a loop over basic blocks.

	* store-motion.c (build_store_vectors): Clear regs_set_in_block at
	the start of a loop over basic blocks.

From-SVN: r155454

gcc/ChangeLog

+2009-12-24  Steven Bosscher  <steven@gcc.gnu.org>
+
+	* store-motion.c (build_store_vectors): Clear regs_set_in_block at
+	the start of a loop over basic blocks.
+
 2009-12-24  Julian Brown  <julian@codesourcery.com>
             Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
 

gcc/store-motion.c

@@ -1067,6 +1067,8 @@ build_store_vectors (void)
 
   FOR_EACH_BB (bb)
     {
+      memset (regs_set_in_block, 0, sizeof (int) * max_gcse_regno);
+
       FOR_BB_INSNS (bb, insn)
 	if (INSN_P (insn))
 	  {