[backport r162881 to 4.6-20100731, fixes PR rtl-optimization/45162 <mikpe@it.uu.se>]

gcc/

2010-08-04  Bernd Schmidt  <bernds@codesourcery.com>

	PR rtl-optimization/45162
	* df-problems.c (df_word_lr_bb_local_compute): Ignore DEBUG_INSNs.
	* dce.c (word_dce_process_block): Likewise.

--- gcc-4.6-20100731/gcc/dce.c.~1~	2010-07-30 01:48:24.000000000 +0200
+++ gcc-4.6-20100731/gcc/dce.c	2010-08-07 14:52:40.000000000 +0200
@@ -795,7 +795,7 @@ word_dce_process_block (basic_block bb, 
   bitmap_copy (local_live, DF_WORD_LR_OUT (bb));
 
   FOR_BB_INSNS_REVERSE (bb, insn)
-    if (INSN_P (insn))
+    if (NONDEBUG_INSN_P (insn))
       {
 	bool any_changed;
 	/* No matter if the instruction is needed or not, we remove
--- gcc-4.6-20100731/gcc/df-problems.c.~1~	2010-07-29 14:39:57.000000000 +0200
+++ gcc-4.6-20100731/gcc/df-problems.c	2010-08-07 14:52:44.000000000 +0200
@@ -2472,7 +2472,7 @@ df_word_lr_bb_local_compute (unsigned in
     {
       unsigned int uid = INSN_UID (insn);
 
-      if (!INSN_P (insn))
+      if (!NONDEBUG_INSN_P (insn))
 	continue;
       for (def_rec = DF_INSN_UID_DEFS (uid); *def_rec; def_rec++)
 	{