re PR debug/45105 (-fcompare-debug failure at -Os)

	PR debug/45105
	* gcse.c (hoist_code): Use FOR_BB_INSNS macro.

	* gcc.dg/pr45105.c: New test.

From-SVN: r162647

gcc/ChangeLog

 2010-07-28  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/45105
+	* gcse.c (hoist_code): Use FOR_BB_INSNS macro.
+
 	PR debug/45103
 	* dwarf2out.c (dwarf2out_var_location): Always consider
 	NOTE_DURING_CALL_P notes, even when not followed by real instructions.

gcc/gcse.c

@@ -4390,21 +4390,15 @@ hoist_code (void)
   FOR_EACH_BB (bb)
     {
       rtx insn;
-      rtx bb_end;
       int to_head;
 
-      insn = BB_HEAD (bb);
-      bb_end = BB_END (bb);
       to_head = 0;
-
-      while (insn != bb_end)
+      FOR_BB_INSNS (bb, insn)
 	{
 	  /* Don't count debug instructions to avoid them affecting
 	     decision choices.  */
 	  if (NONDEBUG_INSN_P (insn))
 	    to_bb_head[INSN_UID (insn)] = to_head++;
-
-	  insn = NEXT_INSN (insn);
 	}
 
       bb_size[bb->index] = to_head;

gcc/testsuite/ChangeLog

+2010-07-28  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/45105
+	* gcc.dg/pr45105.c: New test.
+
 2010-07-28  Maxim Kuvyrkov  <maxim@codesourcery.com>
 
 	PR rtl-optimization/45107

gcc/testsuite/gcc.dg/pr45105.c

+/* PR debug/45105 */
+/* { dg-do compile } */
+/* { dg-options "-Os -fcompare-debug" } */
+
+extern int *baz (int *, int *);
+
+void
+bar (int *p1, int *p2)
+{
+  int n = *baz (0, 0);
+  p1[n] = p2[n];
+}
+
+void
+foo (int *p, int l)
+{
+  int a1[32];
+  int a2[32];
+  baz (a1, a2);
+  while (l)
+    {
+      if (l & 1)
+	p = baz (a2, p);
+      l--;
+      bar (a1, a2);
+    }
+}