diff --git a/gcc/gimple-lower-bitint.cc b/gcc/gimple-lower-bitint.cc
index a3802c61816a561be5a165efafc75d8d1dcf2fe8..758815039219f96f57df05a24fe76704c69cb66b 100644
--- a/gcc/gimple-lower-bitint.cc
+++ b/gcc/gimple-lower-bitint.cc
@@ -5200,9 +5200,18 @@ bitint_large_huge::lower_asm (gimple *stmt)
 	  && TREE_CODE (TREE_TYPE (s)) == BITINT_TYPE
 	  && bitint_precision_kind (TREE_TYPE (s)) >= bitint_prec_large)
 	{
-	  int part = var_to_partition (m_map, s);
-	  gcc_assert (m_vars[part] != NULL_TREE);
-	  TREE_VALUE (t) = m_vars[part];
+	  if (SSA_NAME_IS_DEFAULT_DEF (s)
+	      && (!SSA_NAME_VAR (s) || VAR_P (SSA_NAME_VAR (s))))
+	    {
+	      TREE_VALUE (t) = create_tmp_var (TREE_TYPE (s), "bitint");
+	      mark_addressable (TREE_VALUE (t));
+	    }
+	  else
+	    {
+	      int part = var_to_partition (m_map, s);
+	      gcc_assert (m_vars[part] != NULL_TREE);
+	      TREE_VALUE (t) = m_vars[part];
+	    }
 	}
     }
   update_stmt (stmt);
diff --git a/gcc/testsuite/gcc.dg/bitint-81.c b/gcc/testsuite/gcc.dg/bitint-81.c
new file mode 100644
index 0000000000000000000000000000000000000000..33162fd74c6e95ea07205ebe32ff59ea55c0f2c0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/bitint-81.c
@@ -0,0 +1,12 @@
+/* PR middle-end/113699 */
+/* { dg-do compile { target bitint } } */
+/* { dg-options "-O2 -std=c23" } */
+
+void
+foo (void)
+{
+#if __BITINT_MAXWIDTH__ >= 129
+  _BitInt(129) i;
+  __asm__ ("" : : "rm" (i));
+#endif
+}