Fix issue with NULL as_a in duplicate_insn_chain

2014-08-20  David Malcolm  <dmalcolm@redhat.com>

	* cfgrtl.c (duplicate_insn_chain): Convert the checked cast on
	"insn" from an as_a to a safe_as_a, for the case when "insn" is
	NULL.

From-SVN: r214207

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c1132d4..e1b655f 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2014-08-20  David Malcolm  <dmalcolm@redhat.com>
+
+       * cfgrtl.c (duplicate_insn_chain): Convert the checked cast on
+       "insn" from an as_a to a safe_as_a, for the case when "insn" is
+       NULL.
+
 2014-08-20  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
        PR preprocessor/51303

diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c
index 9c115ba..fd94a03 100644 (file)
--- a/gcc/cfgrtl.c
+++ b/gcc/cfgrtl.c
@@ -4166,7 +4166,7 @@ duplicate_insn_chain (rtx from, rtx to)
     }
   insn = NEXT_INSN (last);
   delete_insn (last);
-  return as_a <rtx_insn *> (insn);
+  return safe_as_a <rtx_insn *> (insn);
 }
 
 /* Create a duplicate of the basic block BB.  */