From 4547eca67f102b9a7705a3e6259f48d993f79b7a Mon Sep 17 00:00:00 2001
From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sun, 2 Jan 2011 17:07:15 +0000
Subject: 	PR rtl-optimization/47028 	* cfgexpand.c
 (gimple_expand_cfg): Insert entry edge 	insertions after
 parm_birth_insn instead of at the beginning 	of first bb.

	* gcc.dg/pr47028.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@168401 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/cfgexpand.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

(limited to 'gcc/cfgexpand.c')

diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c
index a3940d01775..13c63be12ef 100644
--- a/gcc/cfgexpand.c
+++ b/gcc/cfgexpand.c
@@ -4085,7 +4085,19 @@ gimple_expand_cfg (void)
       for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); )
 	{
 	  if (e->insns.r)
-	    commit_one_edge_insertion (e);
+	    {
+	      /* Avoid putting insns before parm_birth_insn.  */
+	      if (e->src == ENTRY_BLOCK_PTR
+		  && single_succ_p (ENTRY_BLOCK_PTR)
+		  && parm_birth_insn)
+		{
+		  rtx insns = e->insns.r;
+		  e->insns.r = NULL_RTX;
+		  emit_insn_after_noloc (insns, parm_birth_insn, e->dest);
+		}
+	      else
+		commit_one_edge_insertion (e);
+	    }
 	  else
 	    ei_next (&ei);
 	}
-- 
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