Skip pr80170.c for non-ptr32plus targets

The testcase uses 32 bit or bigger pointer offsets, and
that triggers an ptrofftype_p assert in tree.c.

gcc/testsuite

2017-04-19  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>

	* gcc.dg/pr80170.c: Require ptr32plus.

From-SVN: r247011

gcc/testsuite/ChangeLog

+2017-04-19  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
+
+	* gcc.dg/pr80170.c: Require ptr32plus.
+
 2017-04-19  Eric Botcazou  <ebotcazou@adacore.com>
 
 	PR tree-optimization/80426

gcc/testsuite/gcc.dg/pr80170.c

 /* { dg-do run } */
 /* { dg-options "-fgimple -O2 -ftree-slp-vectorize" } */
+/* { dg-require-effective-target ptr32plus } */
 
 struct  A
 {