PR middle-end/40500

[pf3gnuchains/gcc-fork.git] / gcc / tree-cfgcleanup.c

diff --git a/gcc/tree-cfgcleanup.c b/gcc/tree-cfgcleanup.c
index 5cce1b6..d3a8ca9 100644 (file)
--- a/gcc/tree-cfgcleanup.c
+++ b/gcc/tree-cfgcleanup.c
@@ -239,6 +239,16 @@ tree_forwarder_block_p (basic_block bb, bool phi_wanted)
   gcc_assert (bb != ENTRY_BLOCK_PTR);
 #endif
 
+  /* There should not be an edge coming from entry, or an EH edge.  */
+  {
+    edge_iterator ei;
+    edge e;
+
+    FOR_EACH_EDGE (e, ei, bb->preds)
+      if (e->src == ENTRY_BLOCK_PTR || (e->flags & EDGE_EH))
+       return false;
+  }
+
   /* Now walk through the statements backward.  We can ignore labels,
      anything else means this is not a forwarder block.  */
   for (gsi = gsi_last_bb (bb); !gsi_end_p (gsi); gsi_prev (&gsi))
@@ -262,9 +272,6 @@ tree_forwarder_block_p (basic_block bb, bool phi_wanted)
        }
     }
 
-  if (find_edge (ENTRY_BLOCK_PTR, bb))
-    return false;
-
   if (current_loops)
     {
       basic_block dest;