Adding the testcase which was not addaed as part of r236356.

gcc/testsuite/ChangeLog:

2016-05-17  Kugan Vivekanandarajah  <kuganv@linaro.org>

	PR middle-end/63586
	* gcc.dg/tree-ssa/pr63586-2.c: New test.
	* gcc.dg/tree-ssa/pr63586.c: New test.

From-SVN: r236359

gcc/testsuite/gcc.dg/tree-ssa/pr63586-2.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fdump-tree-reassoc1" } */
+
+float f1_float (float x, float z)
+{
+    float y = x + z;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    return y;
+}
+
+float f1_float2 (float x)
+{
+    float y = x + 3 * x + x;
+    return y;
+}
+
+int f1_int (int x)
+{
+    int y = x + 4 * x + x;
+    return y;
+}
+
+/* { dg-final { scan-tree-dump-times "\\\* 8\\\.0e\\\+0" 1 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "\\\* 5\\\.0e\\\+0" 1 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "\\\* 6" 1 "reassoc1" } } */
+

gcc/testsuite/gcc.dg/tree-ssa/pr63586.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-reassoc1" } */
+
+unsigned f1 (unsigned x, unsigned z)
+{
+    unsigned y = x + z;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    return y;
+}
+
+/* { dg-final { scan-tree-dump-times "\\\* 7" 1 "reassoc1" } } */
+
+unsigned f2 (unsigned x, unsigned z)
+{
+    unsigned y = x + z;
+    y = y + x;
+    y = y + x;
+    y = y + x;
+    y = y + z;
+    y = y + z;
+    y = y + z;
+    y = y + z;
+    return y;
+}
+
+/* { dg-final { scan-tree-dump-times "\\\* 5" 1 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "\\\* 4" 1 "reassoc1" } } */
+
+unsigned f3 (unsigned x, unsigned z, unsigned k)
+{
+    unsigned y = x + z;
+    y = y + x;
+    y = y + z;
+    y = y + z;
+    y = y + k;
+    return y;
+}
+
+/* { dg-final { scan-tree-dump-times "\\\* 2" 1 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "\\\* 3" 1 "reassoc1" } } */
+
+unsigned f4 (unsigned x, unsigned z, unsigned k)
+{
+    unsigned y = k + x;
+    y = y + z;
+    y = y + z;
+    y = y + z;
+    y = y + z;
+    y = y + z;
+    y = y + z;
+    y = y + z;
+    y = y + z;
+    return y;
+}
+/* { dg-final { scan-tree-dump-times "\\\* 8" 1 "reassoc1" } } */
+
+unsigned f5 (unsigned x, unsigned y, unsigned z)
+{
+    return x + y + y + y + y + y \
+      + y + z + z + z + z + z + z + z + z + z;
+}
+
+/* { dg-final { scan-tree-dump-times "\\\* 6" 1 "reassoc1" } } */
+/* { dg-final { scan-tree-dump-times "\\\* 9" 1 "reassoc1" } } */
+