tree-vect-loop-manip.c (rename_variables_in_bb): Rename PHI nodes when copying…

tree-vect-loop-manip.c (rename_variables_in_bb): Rename PHI nodes when copying loop nest with only one inner loop.

	* tree-vect-loop-manip.c (rename_variables_in_bb): Rename PHI nodes
	when copying loop nest with only one inner loop.

	gcc/testsuite
	* gcc.dg/tree-ssa/ldist-34.c: New test.

From-SVN: r253586

gcc/ChangeLog

+2017-10-10  Bin Cheng  <bin.cheng@arm.com>
+
+	* tree-vect-loop-manip.c (rename_variables_in_bb): Rename PHI nodes
+	when copying loop nest with only one inner loop.
+
 2017-10-10  Richard Biener  <rguenther@suse.de>
 
 	* tree-cfgcleanup.c (cleanup_tree_cfg_noloop): Avoid compacting

gcc/testsuite/ChangeLog

 2017-10-10  Bin Cheng  <bin.cheng@arm.com>
 
+	* gcc.dg/tree-ssa/ldist-34.c: New test.
+
+2017-10-10  Bin Cheng  <bin.cheng@arm.com>
+
 	* gcc.dg/tree-ssa/ldist-27.c: New test.
 
 2017-10-09  Ed Schonberg  <schonberg@adacore.com>

gcc/testsuite/gcc.dg/tree-ssa/ldist-34.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-loop-distribution" } */
+
+#define X (3.0)
+int b, c;
+double a[30000];
+int foo () {
+  for (int i = 0; i < 100; ++i) {
+    for (int j = 0; j < c; ++j)
+      if (b)
+        a[0] = b;
+    a[i * 100] = a[1] = X;
+  }
+  return 0;
+}

gcc/tree-vect-loop-manip.c

@@ -117,8 +117,6 @@ rename_variables_in_bb (basic_block bb, bool rename_from_outer_loop)
 		      || single_pred (e->src) != outer_loop->header)
 		    continue;
 		}
-	      else
-		continue;
 	    }
 	}
       for (gphi_iterator gsi = gsi_start_phis (bb); !gsi_end_p (gsi);