diff --git a/gcc/testsuite/gcc.dg/pr109410.c b/gcc/testsuite/gcc.dg/pr109410.c
new file mode 100644
index 00000000000..a6401fc100c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr109410.c
@@ -0,0 +1,19 @@
+/* PR tree-optimization/109410 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+__attribute__((returns_twice)) int baz (int, int);
+
+int
+bar (int x)
+{
+  return x;
+}
+
+int
+foo (int x, int y)
+{
+  baz (x, y);
+  int a = bar (x);
+  return y || a == 42 || a > 42;
+}
diff --git a/gcc/tree-ssa-reassoc.c b/gcc/tree-ssa-reassoc.c
index 3a4d7e046c5..1a665928c13 100644
--- a/gcc/tree-ssa-reassoc.c
+++ b/gcc/tree-ssa-reassoc.c
@@ -1495,6 +1495,15 @@ build_and_add_sum (tree type, tree op1, tree op2, enum tree_code opcode)
       && (!op2def || gimple_nop_p (op2def)))
     {
       gsi = gsi_after_labels (single_succ (ENTRY_BLOCK_PTR_FOR_FN (cfun)));
+      if (!gsi_end_p (gsi)
+	  && is_gimple_call (gsi_stmt (gsi))
+	  && (gimple_call_flags (gsi_stmt (gsi)) & ECF_RETURNS_TWICE))
+	{
+	  /* Don't add statements before a returns_twice call at the start
+	     of a function.  */
+	  split_edge (single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun)));
+	  gsi = gsi_after_labels (single_succ (ENTRY_BLOCK_PTR_FOR_FN (cfun)));
+	}
       if (gsi_end_p (gsi))
 	{
 	  gimple_stmt_iterator gsi2