diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c5b406a30d1..814e02d6a7b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -43,6 +43,11 @@
 	* expr.c (emit_push_insn): Cast value of PUSH_ROUNDING before
 	comparing it to a signed value.
 
+	PR bootstrap/44756
+	* expr.c (can_store_by_pieces): Add ATTRIBUTE_UNUSED to cst.
+	* haifa-sched.c (initiate_bb_reg_pressure_info): Add ATTRIBUTE_UNUSED
+	to i.
+
 2010-11-05  Jakub Jelinek  <jakub@redhat.com>
 
 	* cfgexpand.c (expand_debug_expr): Handle MEM_REF
diff --git a/gcc/expr.c b/gcc/expr.c
index e994f938b6f..caac0662887 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -2261,7 +2261,8 @@ can_store_by_pieces (unsigned HOST_WIDE_INT len,
   enum machine_mode mode, tmode;
   enum insn_code icode;
   int reverse;
-  rtx cst;
+  /* cst is set but not used if LEGITIMATE_CONSTANT doesn't use it.  */
+  rtx cst ATTRIBUTE_UNUSED;
 
   if (len == 0)
     return 1;
diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c
index 434b760d07d..653561907d0 100644
--- a/gcc/haifa-sched.c
+++ b/gcc/haifa-sched.c
@@ -709,7 +709,7 @@ setup_ref_regs (rtx x)
 static void
 initiate_bb_reg_pressure_info (basic_block bb)
 {
-  unsigned int i;
+  unsigned int i ATTRIBUTE_UNUSED;
   rtx insn;
 
   if (current_nr_blocks > 1)