diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 34bc72166e40..3c80e770d247 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-03-24  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/70372
+	* tree-ssa-reassoc.c (eliminate_plus_minus_pair): Use
+	build_all_ones_cst to also handle vector types correctly.
+
 2016-03-23  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	PR target/70381
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 3a5cf65c2ab6..aa30b1e72824 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2016-03-24  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/70372
+	* gcc.dg/tree-ssa/pr70372.c: New testcase.
+
 2016-03-23  Patrick Palka  <ppalka@gcc.gnu.org>
 
 	PR c++/70347
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr70372.c b/gcc/testsuite/gcc.dg/tree-ssa/pr70372.c
new file mode 100644
index 000000000000..a6d18d25c1c7
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr70372.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fno-tree-fre -w -Wno-psabi" } */
+
+typedef unsigned v2ti __attribute__ ((vector_size (32)));
+
+v2ti
+foo (v2ti u, v2ti v)
+{
+  u[0] >>= 0xf;
+  v ^= ~v;
+  v &= ~u;
+  v -= -u;
+  return v;
+}
diff --git a/gcc/tree-ssa-reassoc.c b/gcc/tree-ssa-reassoc.c
index 0340df249301..d23dabde7b6b 100644
--- a/gcc/tree-ssa-reassoc.c
+++ b/gcc/tree-ssa-reassoc.c
@@ -821,7 +821,7 @@ eliminate_plus_minus_pair (enum tree_code opcode,
 	    }
 
 	  ops->ordered_remove (i);
-	  add_to_ops_vec (ops, build_int_cst_type (op_type, -1));
+	  add_to_ops_vec (ops, build_all_ones_cst (op_type));
 	  ops->ordered_remove (currindex);
 	  reassociate_stats.ops_eliminated ++;