re PR tree-optimization/70729 (Loop marked with omp simd pragma is not vectorized)

PR tree-optimization/70729

gcc/
	* tree-vectorizer.c (adjust_simduid_builtins): Nullify safelen field
	of loop since it can be not valid after transformation.

From-SVN: r237907

gcc/ChangeLog

+2016-07-01  Yuri Rumyantsev  <ysrumyan@gmail.com>
+
+	PR tree-optimization/70729
+	* tree-vectorizer.c (adjust_simduid_builtins): Nullify safelen field
+	of loop since it can be not valid after transformation.
+
 2016-07-01  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* config/arm/arm.c (thumb_reload_in_hi): Delete.

gcc/tree-vectorizer.c

@@ -204,6 +204,10 @@ adjust_simduid_builtins (hash_table<simduid_to_vf> *htab)
 	  gcc_assert (TREE_CODE (arg) == SSA_NAME);
 	  simduid_to_vf *p = NULL, data;
 	  data.simduid = DECL_UID (SSA_NAME_VAR (arg));
+	  /* Need to nullify loop safelen field since it's value is not
+	     valid after transformation.  */
+	  if (bb->loop_father && bb->loop_father->safelen > 0)
+	    bb->loop_father->safelen = 0;
 	  if (htab)
 	    {
 	      p = htab->find (&data);