re PR tree-optimization/68305 (ICE on valid code at -O3 on x86_64-linux-gnu:…

re PR tree-optimization/68305 (ICE on valid code at -O3 on x86_64-linux-gnu: tree check: expected class ‘expression’, have ‘exceptional’ (ssa_name) in tree_operand_check, at tree.h:3436)

gcc/

	PR tree-optimization/68305
	* tree-vect-slp.c (vect_get_constant_vectors): Support
	COND_EXPR with SSA_NAME as a condition.

gcc/testsuite/

	PR tree-optimization/68305
	* gcc.dg/vect/pr68305.c: New test.

From-SVN: r230252

gcc/ChangeLog

+2015-11-12  Ilya Enkovich  <enkovich.gnu@gmail.com>
+
+	PR tree-optimization/68305
+	* tree-vect-slp.c (vect_get_constant_vectors): Support
+	COND_EXPR with SSA_NAME as a condition.
+
 2015-11-12  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* config/visium/visium-protos.h (notice_update_cc): Delete.

gcc/testsuite/ChangeLog

+2015-11-12  Ilya Enkovich  <enkovich.gnu@gmail.com>
+
+	PR tree-optimization/68305
+	* gcc.dg/vect/pr68305.c: New test.
+
 2015-11-12  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.target/i386/pr67265-2.c: New test.

gcc/testsuite/gcc.dg/vect/pr68305.c

+/* { dg-do compile } */
+/* { dg-additional-options "-O3" } */
+/* { dg-additional-options "-mavx2" { target avx_runtime } } */
+
+int a, b;
+
+void
+fn1 ()
+{
+  int c, d;
+  for (; b; b++)
+    a = a ^ !c ^ !d;
+}

gcc/tree-vect-slp.c

@@ -2740,18 +2740,20 @@ vect_get_constant_vectors (tree op, slp_tree slp_node,
 	      switch (code)
 		{
 		  case COND_EXPR:
-		    if (op_num == 0 || op_num == 1)
-		      {
-			tree cond = gimple_assign_rhs1 (stmt);
+		    {
+		      tree cond = gimple_assign_rhs1 (stmt);
+		      if (TREE_CODE (cond) == SSA_NAME)
+			op = gimple_op (stmt, op_num + 1);
+		      else if (op_num == 0 || op_num == 1)
 			op = TREE_OPERAND (cond, op_num);
-		      }
-		    else
-		      {
-			if (op_num == 2)
-			  op = gimple_assign_rhs2 (stmt);
-			else
-			  op = gimple_assign_rhs3 (stmt);
-		      }
+		      else
+			{
+			  if (op_num == 2)
+			    op = gimple_assign_rhs2 (stmt);
+			  else
+			    op = gimple_assign_rhs3 (stmt);
+			}
+		    }
 		    break;
 
 		  case CALL_EXPR: