builtin-snprintf-4.c: Adjust for ILP32.

gcc/testsuite/ChangeLog:
	* gcc.dg/tree-ssa/builtin-snprintf-4.c: Adjust for ILP32.

From-SVN: r267206

gcc/testsuite/ChangeLog

+2018-12-17  Martin Sebor  <msebor@redhat.com>
+
+	* gcc.dg/tree-ssa/builtin-snprintf-4.c: Adjust for ILP32.
+
 2018-12-17  Senthil Kumar Selvaraj  <senthilkumar.selvaraj@microchip.com>
 
 	PR rtl-optimization/88253

gcc/testsuite/gcc.dg/tree-ssa/builtin-snprintf-4.c

@@ -58,7 +58,12 @@ extern void sink (int, ...);
 static const size_t imax = __INT_MAX__;
 static const size_t imaxp1 = imax + 1;
 
+#if __PTRDIFF_MAX__ == __INT_MAX__
+/* Make the test pass on ILP32 the same way it does on LP64.  */
+static const size_t dmax = __PTRDIFF_MAX__ + (size_t)1;
+#else
 static const size_t dmax = __PTRDIFF_MAX__;
+#endif
 static const size_t dmaxp1 = dmax + 1;
 
 static const size_t szmax = __SIZE_MAX__;