re PR tree-optimization/77901 (ICE in tree-sse-reassoc,c:2881)

	PR tree-optimization/77901
	* tree-ssa-reassoc.c (optimize_range_tests_var_bound): Only optimize
	if ranges[i].exp is SSA_NAME when looking for >= and only when
	ranges[i].exp is NULL or SSA_NAME when looking for the other
	comparison.

	* gcc.c-torture/compile/pr77901.c: New test.

From-SVN: r240899

gcc/ChangeLog

+2016-10-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/77901
+	* tree-ssa-reassoc.c (optimize_range_tests_var_bound): Only optimize
+	if ranges[i].exp is SSA_NAME when looking for >= and only when
+	ranges[i].exp is NULL or SSA_NAME when looking for the other
+	comparison.
+
 2016-10-09  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
 
 	* ipa-cp.c (ipcp_alignment_lattice): Remove.

gcc/testsuite/ChangeLog

+2016-10-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/77901
+	* gcc.c-torture/compile/pr77901.c: New test.
+
 2016-10-09  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
 
 	* gcc.dg/ipa/propalign-1.c: Adjust scan-ipa-dump.

gcc/testsuite/gcc.c-torture/compile/pr77901.c

+/* PR tree-optimization/77901 */
+
+void bar (void);
+
+void
+foo (int *x, long *y)
+{
+  if (*y && *x != 10 && *x != 12 && *y >= 0)
+    bar ();
+}

gcc/tree-ssa-reassoc.c

@@ -2846,7 +2846,9 @@ optimize_range_tests_var_bound (enum tree_code opcode, int first, int length,
 
   for (i = first; i < length; i++)
     {
-      if (ranges[i].exp == NULL_TREE || !ranges[i].in_p)
+      if (ranges[i].exp == NULL_TREE
+	  || TREE_CODE (ranges[i].exp) != SSA_NAME
+	  || !ranges[i].in_p)
 	continue;
 
       tree type = TREE_TYPE (ranges[i].exp);
@@ -2878,6 +2880,8 @@ optimize_range_tests_var_bound (enum tree_code opcode, int first, int length,
       tree rhs1, rhs2;
       if (ranges[i].exp)
 	{
+	  if (TREE_CODE (ranges[i].exp) != SSA_NAME)
+	    continue;
 	  stmt = SSA_NAME_DEF_STMT (ranges[i].exp);
 	  if (!is_gimple_assign (stmt))
 	    continue;