From: Sebastian Pop <sebastian.pop@amd.com>
Date: Mon, 3 Nov 2008 16:17:33 +0000 (+0000)
Subject: cfghooks.c (split_block): Set BB_IRREDUCIBLE_LOOP and EDGE_IRREDUCIBLE_LOOP.
X-Git-Tag: releases/gcc-4.4.0~1840
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ede7cba0dd81777994a1d22b582ddb785b949224;p=thirdparty%2Fgcc.git

cfghooks.c (split_block): Set BB_IRREDUCIBLE_LOOP and EDGE_IRREDUCIBLE_LOOP.

2008-11-03  Sebastian Pop  <sebastian.pop@amd.com>

	* cfghooks.c (split_block): Set BB_IRREDUCIBLE_LOOP and
	EDGE_IRREDUCIBLE_LOOP.

From-SVN: r141549
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 32ebb5d077be..5d9bfaa71bb7 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2008-11-03  Sebastian Pop  <sebastian.pop@amd.com>
+
+	* cfghooks.c (split_block): Set BB_IRREDUCIBLE_LOOP and
+	EDGE_IRREDUCIBLE_LOOP.
+
 2008-11-03  Bernd Schmidt  <bernd.schmidt@analog.com>
 
 	* config/bfin/bfin.c (bfin_optimize_loop): Properly handle case
diff --git a/gcc/cfghooks.c b/gcc/cfghooks.c
index 0897b0df5653..10c04a8b0577 100644
--- a/gcc/cfghooks.c
+++ b/gcc/cfghooks.c
@@ -425,6 +425,7 @@ edge
 split_block (basic_block bb, void *i)
 {
   basic_block new_bb;
+  edge res;
 
   if (!cfg_hooks->split_block)
     internal_error ("%s does not support split_block", cfg_hooks->name);
@@ -450,7 +451,15 @@ split_block (basic_block bb, void *i)
 	bb->loop_father->latch = new_bb;
     }
 
-  return make_single_succ_edge (bb, new_bb, EDGE_FALLTHRU);
+  res = make_single_succ_edge (bb, new_bb, EDGE_FALLTHRU);
+
+  if (bb->flags & BB_IRREDUCIBLE_LOOP)
+    {
+      new_bb->flags |= BB_IRREDUCIBLE_LOOP;
+      res->flags |= EDGE_IRREDUCIBLE_LOOP;
+    }
+
+  return res;
 }
 
 /* Splits block BB just after labels.  The newly created edge is returned.  */