re PR tree-optimization/57206 (Auto-vectorization fails when array index is an…

re PR tree-optimization/57206 (Auto-vectorization fails when array index is an unsigned int expression)

	gcc/testsuite
	PR tree-optimization/57206
	* gcc.dg/vect/pr57206.c: New test.

From-SVN: r235926

gcc/testsuite/ChangeLog

+2016-05-05  Bin Cheng  <bin.cheng@arm.com>
+
+	PR tree-optimization/57206
+	* gcc.dg/vect/pr57206.c: New test.
+
 2016-05-05  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* gcc.dg/ipa/inline-8.c	(isnanf): Declare.

gcc/testsuite/gcc.dg/vect/pr57206.c

+/* { dg-do compile } */
+/* { dg-require-effective-target vect_float } */
+
+void bad0(float * d, unsigned int n)
+{
+  unsigned int i;
+  for (i=n; i>0; --i) 
+    d[n-i] = 0.0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */