Add a testcase for PR target/49781.

2011-08-08  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/49781
	* gcc.target/i386/pr49781-1.c: New.

From-SVN: r177569

gcc/testsuite/ChangeLog

+2011-08-08  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/49781
+	* gcc.target/i386/pr49781-1.c: New.
+
 2011-08-08  Jason Merrill  <jason@redhat.com>
 
 	* g++.dg/cpp0x/range-for20.C: Adjust to test 50020 as well.

gcc/testsuite/gcc.target/i386/pr49781-1.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fpic" } */
+/* { dg-require-effective-target fpic } */
+
+static int heap[2*(256 +1+29)+1];
+static int heap_len;
+static int heap_max;
+void 
+foo (int elems)
+{
+  int n, m;
+  int max_code = -1;
+  int node = elems;
+  heap_len = 0, heap_max = (2*(256 +1+29)+1);
+  for (n = 0; n < elems; n++)
+    heap[++heap_len] = max_code = n;
+  do {
+    n = heap[1];
+    heap[1] = heap[heap_len--];
+    m = heap[1];
+    heap[--heap_max] = n;
+    heap[--heap_max] = m;
+  } while (heap_len >= 2);
+}
+
+/* { dg-final { scan-assembler-not "lea\[lq\]?\[ \t\]\\((%|)r\[a-z0-9\]*" } } */