re PR rtl-optimization/51014 (ICE: in apply_opt_in_copies, at loop-unroll.c:2283…

re PR rtl-optimization/51014 (ICE: in apply_opt_in_copies, at loop-unroll.c:2283 with -O2 -g -funroll-loops)

	PR rtl-optimization/51014
	* loop-unroll.c (apply_opt_in_copies): Ignore label DEBUG_INSNs
	both from bb and orig_bb.

	* g++.dg/opt/pr51014.C: New test.

From-SVN: r181883

gcc/ChangeLog

+2011-12-01  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/51014
+	* loop-unroll.c (apply_opt_in_copies): Ignore label DEBUG_INSNs
+	both from bb and orig_bb.
+
 2011-12-01  Joern Rennecke  <joern.rennecke@embecosm.com>
 
 	PR tree-optimization/50802

gcc/loop-unroll.c

 /* Loop unrolling and peeling.
-   Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2010
+   Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2010, 2011
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -2262,10 +2262,15 @@ apply_opt_in_copies (struct opt_info *opt_info,
       for (insn = BB_HEAD (bb); insn != NEXT_INSN (BB_END (bb)); insn = next)
         {
           next = NEXT_INSN (insn);
-          if (!INSN_P (insn))
+	  if (!INSN_P (insn)
+	      || (DEBUG_INSN_P (insn)
+		  && TREE_CODE (INSN_VAR_LOCATION_DECL (insn)) == LABEL_DECL))
             continue;
 
-          while (!INSN_P (orig_insn))
+	  while (!INSN_P (orig_insn)
+		 || (DEBUG_INSN_P (orig_insn)
+		     && (TREE_CODE (INSN_VAR_LOCATION_DECL (orig_insn))
+			 == LABEL_DECL)))
             orig_insn = NEXT_INSN (orig_insn);
 
           ivts_templ.insn = orig_insn;

gcc/testsuite/ChangeLog

+2011-12-01  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/51014
+	* g++.dg/opt/pr51014.C: New test.
+
 2011-12-01  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/51367

gcc/testsuite/g++.dg/opt/pr51014.C

+// PR rtl-optimization/51014
+// { dg-do compile }
+// { dg-options "-O2 -funroll-loops -fcompare-debug" }
+
+struct S
+{
+  ~S() { delete s; }
+  int *s;
+};
+
+void
+f (S *x, S *y)
+{
+  for (; x != y; ++x)
+    x->~S();
+}