This backport contains 1 patch from gcc main stream tree.
The commit id of these patchs list as following in the order of time.

0001-Handle-POLY_INT_CSTs-in-declare_return_value.patch
be5f7eccf766a4c3a59b821f77ce320001df838f

diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/general/inline_1.c b/gcc/testsuite/gcc.target/aarch64/sve/acle/general/inline_1.c
new file mode 100644
index 00000000000..f736ac3f082
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/general/inline_1.c
@@ -0,0 +1,6 @@
+/* { dg-options "-O2" } */
+
+#pragma GCC aarch64 "arm_sve.h"
+
+static inline svint32_t foo () { return svdup_s32 (32); }
+svint32_t bar () { return svadd_x (svptrue_b8 (), foo (), 1); }
diff --git a/gcc/tree-inline.c b/gcc/tree-inline.c
index 2b8b9ee58c1..9d0acd97f77 100644
--- a/gcc/tree-inline.c
+++ b/gcc/tree-inline.c
@@ -3654,7 +3654,7 @@ declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest,
       /* ??? If we're assigning to a variable sized type, then we must
 	 reuse the destination variable, because we've no good way to
 	 create variable sized temporaries at this point.  */
-      else if (TREE_CODE (TYPE_SIZE_UNIT (caller_type)) != INTEGER_CST)
+      else if (!poly_int_tree_p (TYPE_SIZE_UNIT (caller_type)))
 	use_it = true;
 
       /* If the callee cannot possibly modify MODIFY_DEST, then we can
@@ -3689,7 +3689,7 @@ declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest,
 	}
     }
 
-  gcc_assert (TREE_CODE (TYPE_SIZE_UNIT (callee_type)) == INTEGER_CST);
+  gcc_assert (poly_int_tree_p (TYPE_SIZE_UNIT (callee_type)));
 
   var = copy_result_decl_to_var (result, id);
   DECL_SEEN_IN_BIND_EXPR_P (var) = 1;