re PR tree-optimization/51990 (ICE in copy_reference_ops_from_ref)

2012-01-27  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/51990
	* gcc.dg/pr51990.c: New test.
	* gcc.dg/pr51990-2.c: Same.

From-SVN: r183615

gcc/testsuite/ChangeLog

+2012-01-27  Tom de Vries  <tom@codesourcery.com>
+
+	PR tree-optimization/51990
+	* gcc.dg/pr51990.c: New test.
+	* gcc.dg/pr51990-2.c: Same.
+
 2012-01-27  Paul Thomas  <pault@gcc.gnu.org>
 	    Tobias Burnus <burnus@gcc.gnu.org>
 

gcc/testsuite/gcc.dg/pr51990-2.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+int y;
+extern int foo (int, ...) __attribute__((pure));
+
+int
+zzz (char *s1, char *s2, int len, int *q, int c)
+{
+  int z = 5;
+  unsigned int i, b;
+  struct s { char a[z]; };
+  struct s x;
+  int y_tmp = 5;
+
+  for (i = 0; i < len; i++)
+    s1[i] = s2[i];
+
+  b = z & 0x3;
+
+  len += (b == 0 ? 0 : 1) + z;
+
+  *q = len;
+
+ if (c)
+   y_tmp = foo (z, x, x) + 4;
+
+ z = foo (z, x, x) + 4;
+ y = y_tmp;
+
+ return  z;
+}

gcc/testsuite/gcc.dg/pr51990.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+int
+zzz (char *s1, char *s2, int len, int *q)
+{
+  int z = 5;
+  unsigned int i, b;
+  struct s { char a[z]; };
+  struct s x;
+
+  extern int foo (int, ...) __attribute__((pure));
+
+  for (i = 0; i < len; i++)
+    s1[i] = s2[i];
+
+  b = z & 0x3;
+
+  len += (b == 0 ? 0 : 1) + z;
+
+  *q = len;
+  return foo (z, x, x);
+}