re PR regression/58165 (internal compiler error: verify_flow_info)

	PR tree-optimization/58165
	* tree-call-cdce.c (shrink_wrap_one_built_in_call): If
	bi_call must be the last stmt in a bb, don't split_block, instead
	use fallthru edge from it and give up if there is none.
	Release conds vector when returning early.

	* g++.dg/opt/pr58165.C: New test.

From-SVN: r201780

gcc/ChangeLog

+2013-08-16  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/58165
+	* tree-call-cdce.c (shrink_wrap_one_built_in_call): If
+	bi_call must be the last stmt in a bb, don't split_block, instead
+	use fallthru edge from it and give up if there is none.
+	Release conds vector when returning early.
+
 2013-08-14  Xinliang David Li  <davidxl@google.com>
 
 	* config/i386/i386.c (ix86_option_override_internal):

gcc/testsuite/ChangeLog

+2013-08-16  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/58165
+	* g++.dg/opt/pr58165.C: New test.
+
 2013-08-14  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/51912

gcc/testsuite/g++.dg/opt/pr58165.C

+// PR tree-optimization/58165
+// { dg-do compile }
+// { dg-options "-O2" }
+
+extern "C" float sqrtf (float);
+
+struct A { A (); ~A (); };
+
+void
+foo (double d)
+{
+  A a;
+  sqrtf (d);
+}

gcc/tree-call-cdce.c

@@ -726,15 +726,28 @@ shrink_wrap_one_built_in_call (gimple bi_call)
      return false and do not do any transformation for
      the call.  */
   if (nconds == 0)
-    return false;
+    {
+      conds.release ();
+      return false;
+    }
 
   bi_call_bb = gimple_bb (bi_call);
 
-  /* Now find the join target bb -- split
-     bi_call_bb if needed.  */
-  bi_call_bsi = gsi_for_stmt (bi_call);
+  /* Now find the join target bb -- split bi_call_bb if needed.  */
+  if (stmt_ends_bb_p (bi_call))
+    {
+      /* If the call must be the last in the bb, don't split the block,
+	 it could e.g. have EH edges.  */
+      join_tgt_in_edge_from_call = find_fallthru_edge (bi_call_bb->succs);
+      if (join_tgt_in_edge_from_call == NULL)
+	{
+	  conds.release ();
+	  return false;
+	}
+    }
+  else
+    join_tgt_in_edge_from_call = split_block (bi_call_bb, bi_call);
 
-  join_tgt_in_edge_from_call = split_block (bi_call_bb, bi_call);
   bi_call_bsi = gsi_for_stmt (bi_call);
 
   join_tgt_bb = join_tgt_in_edge_from_call->dest;