diff --git a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-11.c b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-11.c
index 5e3cfc925105f576adf332df517727c857a4de0f..0f7cbbb87ef028f166366aea55bc4ef49d2f8e9b 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-11.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-11.c
@@ -9,5 +9,5 @@
 
 #include "vect-reduc-dot-9.c"
 
-/* { dg-final { scan-tree-dump-not "vect_recog_dot_prod_pattern: detected" "vect" } } */
+/* { dg-final { scan-tree-dump "vect_recog_dot_prod_pattern: detected" "vect" } } */
 /* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" { target vect_usdot_qi } } } */
diff --git a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-15.c b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-15.c
index 5a6fd1969ce9403cbefb5b55c71bdd40894fc931..dc48f95a32bf76c54a906ee81ddee99b16aea84a 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-15.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-15.c
@@ -9,5 +9,5 @@
 
 #include "vect-reduc-dot-9.c"
 
-/* { dg-final { scan-tree-dump-not "vect_recog_dot_prod_pattern: detected" "vect" } } */
+/* { dg-final { scan-tree-dump "vect_recog_dot_prod_pattern: detected" "vect" } } */
 /* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" { target vect_usdot_qi } } } */
diff --git a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-19.c b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-19.c
index 962b24ec2047b99ebedc116f68e460c6ab6fc1e7..dbeaaec24a1095b7730d9e1262f5a951fd2312fc 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-19.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-19.c
@@ -49,4 +49,4 @@ main (void)
     __builtin_abort ();
 }
 
-/* { dg-final { scan-tree-dump-not "vect_recog_dot_prod_pattern: detected" "vect" } } */
+/* { dg-final { scan-tree-dump "vect_recog_dot_prod_pattern: detected" "vect" } } */
diff --git a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-21.c b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-21.c
index b5754bf7dde29b5944bbc72919ea03f65b9bd7ad..6d08bf4478be83de86b0975524687a75d025123e 100644
--- a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-21.c
+++ b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-21.c
@@ -49,4 +49,4 @@ main (void)
     __builtin_abort ();
 }
 
-/* { dg-final { scan-tree-dump-not "vect_recog_dot_prod_pattern: detected" "vect" } } */
+/* { dg-final { scan-tree-dump "vect_recog_dot_prod_pattern: detected" "vect" } } */
diff --git a/gcc/tree-vect-patterns.c b/gcc/tree-vect-patterns.c
index 71533e61c934c63dd05a33c8f7159185e9b11a1b..53ced5d08fbf52094eb375d5d4cde179fd741a17 100644
--- a/gcc/tree-vect-patterns.c
+++ b/gcc/tree-vect-patterns.c
@@ -1039,12 +1039,6 @@ vect_recog_dot_prod_pattern (vec_info *vinfo,
 	: TYPE_SIGN (unprom_mult.type) != TYPE_SIGN (half_type)))
     return NULL;
 
-  /* If there are two widening operations, make sure they agree on
-     the sign of the extension.  */
-  if (TYPE_PRECISION (unprom_mult.type) != TYPE_PRECISION (type)
-      && TYPE_SIGN (unprom_mult.type) != TYPE_SIGN (half_type))
-    return NULL;
-
   vect_pattern_detected ("vect_recog_dot_prod_pattern", last_stmt);
 
   tree half_vectype;