Fix gcc.dg/torture/ssa-fre-{5,7}.c failure for avr

The test assumes 32 bit integers (and pointers), and therefore
fails for the avr target, which has 16 bit integers.
    
Fix failure for avr by adding dg-require-effective-target int32.

gcc/testsuite/ChangeLog:

2019-08-02  Senthil Kumar Selvaraj  <senthilkumar.selvaraj@microchip.com>

	* gcc.dg/torture/ssa-fre-5.c: Add dg-require-effective-target int32.
	* gcc.dg/torture/ssa-fre-7.c: Likewise.

From-SVN: r274001

gcc/testsuite/ChangeLog

+2019-08-02  Senthil Kumar Selvaraj  <senthilkumar.selvaraj@microchip.com>
+
+	* gcc.dg/torture/ssa-fre-5.c: Add dg-require-effective-target int32.
+	* gcc.dg/torture/ssa-fre-7.c: Likewise.
+
 2019-08-02  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/91201

gcc/testsuite/gcc.dg/torture/ssa-fre-5.c

 /* { dg-do compile } */
+/* { dg-require-effective-target int32 } */
 /* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
 /* { dg-additional-options "-fgimple -fdump-tree-fre1" } */
 

gcc/testsuite/gcc.dg/torture/ssa-fre-7.c

 /* { dg-do compile } */
+/* { dg-require-effective-target int32 } */
 /* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
 /* { dg-additional-options "-fgimple -fdump-tree-fre1" } */