[backport r176728 to fix PR49827 on SPARC, HPPA, CRIS <mikpe@it.uu.se>]

gcc/

2011-07-24  Richard Henderson  <rth@redhat.com>

	PR debug/49827
	* dwarf2cfi.c (create_trace_edges): Handle sequences properly.

--- gcc-4.7-20110723/gcc/dwarf2cfi.c.~1~	2011-07-23 22:49:33.000000000 +0200
+++ gcc-4.7-20110723/gcc/dwarf2cfi.c	2011-08-25 16:22:39.000000000 +0200
@@ -2495,6 +2495,14 @@ create_trace_edges (rtx insn)
 	for (lab = nonlocal_goto_handler_labels; lab; lab = XEXP (lab, 1))
 	  maybe_record_trace_start (XEXP (lab, 0), insn);
     }
+  else if (GET_CODE (PATTERN (insn)) == SEQUENCE)
+    {
+      rtx seq = PATTERN (insn);
+      int i, n = XVECLEN (seq, 0);
+      for (i = 0; i < n; ++i)
+	create_trace_edges (XVECEXP (seq, 0, i));
+      return;
+    }
 
   /* Process EH edges.  */
   if (CALL_P (insn) || cfun->can_throw_non_call_exceptions)