re PR tree-optimization/85693 (Generation of SAD (Sum of Absolute Difference) instruction)

	PR target/85693
	* gcc.target/i386/pr85693.c: New test.

From-SVN: r260047

gcc/testsuite/ChangeLog

+2018-05-08  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/85693
+	* gcc.target/i386/pr85693.c: New test.
+
 2018-05-08  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/85683

gcc/testsuite/gcc.target/i386/pr85693.c

+/* { dg-do compile }
+/* { dg-options "-msse2 -O2 -ftree-vectorize" } */
+
+#define N 1024
+
+int abs (int);
+
+unsigned char pix1[N], pix2[N];
+
+int foo (void)
+{
+  int i_sum = 0;
+  int i;
+
+  for (i = 0; i < N; i++)
+    i_sum += abs (pix1[i] - pix2[i]);
+
+  return i_sum;
+}
+
+/* { dg-final { scan-assembler "psadbw" } } */