re PR rtl-optimization/45353 (ICE: RTL check: expected elt 3 type 'B', have '0'…

re PR rtl-optimization/45353 (ICE: RTL check: expected elt 3 type 'B', have '0' (rtx barrier) in sel_bb_head, at sel-sched-ir.c:4329 with -fselective-scheduling and __builtin_unreachable())

	PR rtl-optimization/45353
	* sel-sched-ir.c (sel_bb_head): Return NULL even if next_nonnote_insn
	after bb_note is a BARRIER.

	* gcc.dg/pr45353.c: New test.

From-SVN: r163412

gcc/ChangeLog

+2010-08-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/45353
+	* sel-sched-ir.c (sel_bb_head): Return NULL even if next_nonnote_insn
+	after bb_note is a BARRIER.
+
 2010-08-20  Iain Sandoe  <iains@gcc.gnu.org>
 
 	* config/rs6000/darwin.h (LIB_SPEC): New. Provide save/restFP by 

gcc/sel-sched-ir.c

@@ -4326,7 +4326,7 @@ sel_bb_head (basic_block bb)
       note = bb_note (bb);
       head = next_nonnote_insn (note);
 
-      if (head && BLOCK_FOR_INSN (head) != bb)
+      if (head && (BARRIER_P (head) || BLOCK_FOR_INSN (head) != bb))
 	head = NULL_RTX;
     }
 

gcc/testsuite/ChangeLog

+2010-08-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/45353
+	* gcc.dg/pr45353.c: New test.
+
 2010-08-20  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* gcc.target/i386/volatile-2.c: New.

gcc/testsuite/gcc.dg/pr45353.c

+/* PR rtl-optimization/45353 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fschedule-insns -fselective-scheduling" } */
+
+void
+foo ()
+{
+  __builtin_unreachable ();
+}