diff --git a/gcc/testsuite/g++.target/aarch64/pr98177-1.C b/gcc/testsuite/g++.target/aarch64/pr98177-1.C
new file mode 100644
index 0000000000000000000000000000000000000000..a776b7352f966f6b1d870ed51a7c94647bc46d80
--- /dev/null
+++ b/gcc/testsuite/g++.target/aarch64/pr98177-1.C
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-Ofast -march=armv8.2-a+sve -msve-vector-bits=128" } */
+
+int a, b;
+short c;
+void d(long e) {
+  for (int f = 0; f < b; f += 1)
+    for (short g = 0; g < c; g += 5)
+      a = (short)e;
+}
diff --git a/gcc/testsuite/g++.target/aarch64/pr98177-2.C b/gcc/testsuite/g++.target/aarch64/pr98177-2.C
new file mode 100644
index 0000000000000000000000000000000000000000..f89777075e962f2d11a6808d1c2b1ceac226a903
--- /dev/null
+++ b/gcc/testsuite/g++.target/aarch64/pr98177-2.C
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-Ofast -march=armv8.2-a+sve -msve-vector-bits=128" } */
+
+int a, b, c;
+
+void foo(long e) {
+  for (int f = 0; f < b; f ++)
+    for (int g = 0; g < c; g ++)
+      a = (short)e;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/pr98177-1.c b/gcc/testsuite/gcc.target/aarch64/pr98177-1.c
new file mode 100644
index 0000000000000000000000000000000000000000..a776b7352f966f6b1d870ed51a7c94647bc46d80
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/pr98177-1.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-Ofast -march=armv8.2-a+sve -msve-vector-bits=128" } */
+
+int a, b;
+short c;
+void d(long e) {
+  for (int f = 0; f < b; f += 1)
+    for (short g = 0; g < c; g += 5)
+      a = (short)e;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/pr98177-2.c b/gcc/testsuite/gcc.target/aarch64/pr98177-2.c
new file mode 100644
index 0000000000000000000000000000000000000000..f89777075e962f2d11a6808d1c2b1ceac226a903
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/pr98177-2.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-Ofast -march=armv8.2-a+sve -msve-vector-bits=128" } */
+
+int a, b, c;
+
+void foo(long e) {
+  for (int f = 0; f < b; f ++)
+    for (int g = 0; g < c; g ++)
+      a = (short)e;
+}
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index 52757add0e3dbae41608a1786661b326f0da9be9..98135568bf3d3c5bdd92a304c04a3524bfb917b7 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -6929,8 +6929,8 @@ vectorizable_reduction (loop_vec_info loop_vinfo,
       int scalar_precision
 	= GET_MODE_PRECISION (SCALAR_TYPE_MODE (scalar_type));
       cr_index_scalar_type = make_unsigned_type (scalar_precision);
-      cr_index_vector_type = build_vector_type (cr_index_scalar_type,
-						nunits_out);
+      cr_index_vector_type = get_same_sized_vectype (cr_index_scalar_type,
+						vectype_out);
 
       if (direct_internal_fn_supported_p (IFN_REDUC_MAX, cr_index_vector_type,
 					  OPTIMIZE_FOR_SPEED))