re PR rtl-optimization/83363 (wrong code at -O2 -fno-forward-propagate)

	PR rtl-optimization/83363
	PR rtl-optimization/83364
	* gcc.dg/pr83363.c: New test.
	* gcc.dg/pr83364.c: New test.

From-SVN: r255576

gcc/testsuite/ChangeLog

 2017-12-12  Jakub Jelinek  <jakub@redhat.com>
 
+	PR rtl-optimization/83363
+	PR rtl-optimization/83364
+	* gcc.dg/pr83363.c: New test.
+	* gcc.dg/pr83364.c: New test.
+
 	PR tree-optimization/83359
 	* gcc.dg/graphite/pr83359.c: New test.
 

gcc/testsuite/gcc.dg/pr83363.c

+/* PR rtl-optimization/83363 */
+/* { dg-do run } */
+/* { dg-options "-O2 -fno-forward-propagate" } */
+
+unsigned char a;
+unsigned int b;
+
+static unsigned short __attribute__ ((noinline, noclone))
+foo (unsigned short x)
+{
+  x -= b;
+  x <<= x == 0;
+  a = ~0;
+  a >>= (unsigned char) x == 0;
+  x *= a -= ~a;
+  return x;
+}
+
+int
+main ()
+{
+  asm volatile ("" : : : "memory");
+  if (foo (3) != (unsigned short) (3 * (unsigned char) ~0))
+    __builtin_abort ();
+  return 0;
+}

gcc/testsuite/gcc.dg/pr83364.c

+/* PR rtl-optimization/83364 */
+/* { dg-do run } */
+/* { dg-options "-O -fno-forward-propagate -fno-tree-coalesce-vars -fno-tree-ter" } */
+
+int a;
+
+static int __attribute__ ((noinline, noclone))
+foo (unsigned char c)
+{
+  c <<= (long long) c != a;
+  c = c << 7 | c >> 1;
+  return c;
+}
+
+int
+main ()
+{
+  asm volatile ("" : : : "memory");
+  if (foo (0) != 0)
+    __builtin_abort ();
+  return 0;
+}