diff -Nrcpad gcc-4.5.0/gcc/ada/ChangeLog gcc-4.5.1/gcc/ada/ChangeLog
*** gcc-4.5.0/gcc/ada/ChangeLog	Wed Apr 14 09:21:37 2010
--- gcc-4.5.1/gcc/ada/ChangeLog	Sat Jul 31 09:25:39 2010
***************
*** 1,3 ****
--- 1,19 ----
+ 2010-07-31  Release Manager
+ 
+ 	* GCC 4.5.1 released.
+ 
+ 2010-07-11  Kai Tietz  <kai.tietz@onevision.com>
+ 
+ 	Merged back from trunk
+         PR ada/43731
+         * gcc-interface/Makefile.in: Add rules for multilib x86/x64
+         mingw targets.
+ 
+ 2010-04-25  Eric Botcazou  <ebotcazou@adacore.com>
+ 
+ 	* gcc-interface/trans.c (gnat_to_gnu) <N_Assignment_Statement>: Do not
+ 	use memmove if the array type is bit-packed.
+ 
  2010-04-14  Release Manager
  
  	* GCC 4.5.0 released.
diff -Nrcpad gcc-4.5.0/gcc/ada/gcc-interface/Makefile.in gcc-4.5.1/gcc/ada/gcc-interface/Makefile.in
*** gcc-4.5.0/gcc/ada/gcc-interface/Makefile.in	Wed Mar 10 23:25:37 2010
--- gcc-4.5.1/gcc/ada/gcc-interface/Makefile.in	Sun Jul 11 09:15:12 2010
*************** ifeq ($(strip $(filter-out cygwin32% min
*** 1646,1656 ****
      s-taprop.adb<s-taprop-mingw.adb
  
      ifeq ($(strip $(filter-out x86_64%,$(arch))),)
!       LIBGNAT_TARGET_PAIRS += \
!         system.ads<system-mingw-x86_64.ads
      else
!       LIBGNAT_TARGET_PAIRS += \
!         system.ads<system-mingw.ads
      endif
  
      EXTRA_GNATRTL_NONTASKING_OBJS = \
--- 1646,1666 ----
      s-taprop.adb<s-taprop-mingw.adb
  
      ifeq ($(strip $(filter-out x86_64%,$(arch))),)
!       ifeq ($(strip $(MULTISUBDIR)),/32)
! 	LIBGNAT_TARGET_PAIRS += \
! 	  system.ads<system-mingw.ads
!       else
! 	LIBGNAT_TARGET_PAIRS += \
! 	  system.ads<system-mingw-x86_64.ads
!       endif
      else
!       ifeq ($(strip $(MULTISUBDIR)),/64)
! 	LIBGNAT_TARGET_PAIRS += \
! 	  system.ads<system-mingw-x86_64.ads
!       else
! 	LIBGNAT_TARGET_PAIRS += \
! 	  system.ads<system-mingw.ads
!       endif
      endif
  
      EXTRA_GNATRTL_NONTASKING_OBJS = \
diff -Nrcpad gcc-4.5.0/gcc/ada/gcc-interface/trans.c gcc-4.5.1/gcc/ada/gcc-interface/trans.c
*** gcc-4.5.0/gcc/ada/gcc-interface/trans.c	Fri Dec  4 12:05:08 2009
--- gcc-4.5.1/gcc/ada/gcc-interface/trans.c	Sun Apr 25 09:25:47 2010
*************** gnat_to_gnu (Node_Id gnat_node)
*** 4563,4572 ****
  	  gnu_result
  	    = build_binary_op (MODIFY_EXPR, NULL_TREE, gnu_lhs, gnu_rhs);
  
! 	  /* If the type being assigned is an array type and the two sides
! 	     are not completely disjoint, play safe and use memmove.  */
  	  if (TREE_CODE (gnu_result) == MODIFY_EXPR
  	      && Is_Array_Type (Etype (Name (gnat_node)))
  	      && !(Forwards_OK (gnat_node) && Backwards_OK (gnat_node)))
  	    {
  	      tree to, from, size, to_ptr, from_ptr, t;
--- 4563,4574 ----
  	  gnu_result
  	    = build_binary_op (MODIFY_EXPR, NULL_TREE, gnu_lhs, gnu_rhs);
  
! 	  /* If the type being assigned is an array type and the two sides are
! 	     not completely disjoint, play safe and use memmove.  But don't do
! 	     it for a bit-packed array as it might not be byte-aligned.  */
  	  if (TREE_CODE (gnu_result) == MODIFY_EXPR
  	      && Is_Array_Type (Etype (Name (gnat_node)))
+ 	      && !Is_Bit_Packed_Array (Etype (Name (gnat_node)))
  	      && !(Forwards_OK (gnat_node) && Backwards_OK (gnat_node)))
  	    {
  	      tree to, from, size, to_ptr, from_ptr, t;
diff -Nrcpad gcc-4.5.0/gnattools/ChangeLog gcc-4.5.1/gnattools/ChangeLog
*** gcc-4.5.0/gnattools/ChangeLog	Wed Apr 14 09:19:11 2010
--- gcc-4.5.1/gnattools/ChangeLog	Sat Jul 31 09:23:26 2010
***************
*** 1,3 ****
--- 1,7 ----
+ 2010-07-31  Release Manager
+ 
+ 	* GCC 4.5.1 released.
+ 
  2010-04-14  Release Manager
  
  	* GCC 4.5.0 released.
diff -Nrcpad gcc-4.5.0/libada/ChangeLog gcc-4.5.1/libada/ChangeLog
*** gcc-4.5.0/libada/ChangeLog	Wed Apr 14 09:20:19 2010
--- gcc-4.5.1/libada/ChangeLog	Sat Jul 31 09:24:26 2010
***************
*** 1,3 ****
--- 1,7 ----
+ 2010-07-31  Release Manager
+ 
+ 	* GCC 4.5.1 released.
+ 
  2010-04-14  Release Manager
  
  	* GCC 4.5.0 released.