Index: gcc/Makefile.in
===================================================================
--- gcc/Makefile.in	2010-07-07 22:21:40.000000000 +0100
+++ gcc/Makefile.in	2010-07-07 22:29:12.000000000 +0100
@@ -3094,7 +3094,7 @@ gcse.o : gcse.c $(CONFIG_H) $(SYSTEM_H)
    $(RECOG_H) $(EXPR_H) $(BASIC_BLOCK_H) $(FUNCTION_H) output.h $(TOPLEV_H) \
    $(TM_P_H) $(PARAMS_H) cselib.h $(EXCEPT_H) gt-gcse.h $(TREE_H) $(TIMEVAR_H) \
    intl.h $(OBSTACK_H) $(TREE_PASS_H) $(DF_H) $(DBGCNT_H) $(TARGET_H) \
-   $(DF_H)
+   $(DF_H) gcse.h
 store-motion.o : store-motion.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) \
    $(REGS_H) hard-reg-set.h $(FLAGS_H) insn-config.h $(GGC_H) \
    $(RECOG_H) $(EXPR_H) $(BASIC_BLOCK_H) $(FUNCTION_H) output.h $(TOPLEV_H) \
@@ -3479,7 +3479,7 @@ lower-subreg.o : lower-subreg.c $(CONFIG
 target-globals.o : target-globals.c $(CONFIG_H) $(SYSTEM_H) coretypes.h \
    $(TM_H) insn-config.h $(MACHMODE_H) $(GGC_H) $(TOPLEV_H) target-globals.h \
    $(FLAGS_H) $(REGS_H) $(RTL_H) reload.h expmed.h $(EXPR_H) $(OPTABS_H) \
-   $(LIBFUNCS_H) $(CFGLOOP_H) $(IRA_INT_H) builtins.h
+   $(LIBFUNCS_H) $(CFGLOOP_H) $(IRA_INT_H) builtins.h gcse.h
 
 $(out_object_file): $(out_file) $(CONFIG_H) coretypes.h $(TM_H) $(TREE_H) \
    $(RTL_H) $(REGS_H) hard-reg-set.h insn-config.h conditions.h \
Index: gcc/gcse.h
===================================================================
--- /dev/null	2010-07-07 22:25:18.139280603 +0100
+++ gcc/gcse.h	2010-07-07 22:29:12.000000000 +0100
@@ -0,0 +1,43 @@
+/* Global common subexpression elimination/Partial redundancy elimination
+   and global constant/copy propagation for GNU compiler.
+   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+   2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_GCSE_H
+#define GCC_GCSE_H
+
+/* Target-dependent globals.  */
+struct target_gcse {
+  /* Nonzero for each mode that supports (set (reg) (reg)).
+     This is trivially true for integer and floating point values.
+     It may or may not be true for condition codes.  */
+  int x_can_copy[(int) NUM_MACHINE_MODES];
+
+  /* True if the previous field has been initialized.  */
+  bool x_can_copy_init_p;
+};
+
+extern GTY(()) struct target_gcse default_target_gcse;
+#if SWITCHABLE_TARGET
+extern struct target_gcse *this_target_gcse;
+#else
+#define this_target_gcse (&default_target_gcse)
+#endif
+
+#endif
Index: gcc/gcse.c
===================================================================
--- gcc/gcse.c	2010-07-04 22:48:28.000000000 +0100
+++ gcc/gcse.c	2010-07-07 22:29:12.000000000 +0100
@@ -169,6 +169,7 @@ Software Foundation; either version 3, o
 #include "df.h"
 #include "dbgcnt.h"
 #include "target.h"
+#include "gcse.h"
 
 /* We support GCSE via Partial Redundancy Elimination.  PRE optimizations
    are a superset of those done by classic GCSE.
@@ -262,6 +263,11 @@ Software Foundation; either version 3, o
 
 /* GCSE global vars.  */
 
+struct target_gcse default_target_gcse;
+#if SWITCHABLE_TARGET
+struct target_gcse *this_target_gcse = &default_target_gcse;
+#endif
+
 /* Set to non-zero if CSE should run after all GCSE optimizations are done.  */
 int flag_rerun_cse_after_global_opts;
 
@@ -538,10 +544,10 @@ #define GOBNEWVAR(T, S)		((T *) gcse_all
 
 /* Misc. utilities.  */
 
-/* Nonzero for each mode that supports (set (reg) (reg)).
-   This is trivially true for integer and floating point values.
-   It may or may not be true for condition codes.  */
-static char can_copy[(int) NUM_MACHINE_MODES];
+#define can_copy \
+  (this_target_gcse->x_can_copy)
+#define can_copy_init_p \
+  (this_target_gcse->x_can_copy_init_p)
 
 /* Compute which modes support reg/reg copy operations.  */
 
@@ -578,8 +584,6 @@ compute_can_copy (void)
 bool
 can_copy_p (enum machine_mode mode)
 {
-  static bool can_copy_init_p = false;
-
   if (! can_copy_init_p)
     {
       compute_can_copy ();
Index: gcc/target-globals.h
===================================================================
--- gcc/target-globals.h	2010-07-07 22:21:40.000000000 +0100
+++ gcc/target-globals.h	2010-07-07 22:29:12.000000000 +0100
@@ -33,6 +33,7 @@ #define TARGET_GLOBALS_H 1
 extern struct target_ira *this_target_ira;
 extern struct target_ira_int *this_target_ira_int;
 extern struct target_builtins *this_target_builtins;
+extern struct target_gcse *this_target_gcse;
 
 struct GTY(()) target_globals {
   struct target_flag_state *GTY((skip)) flag_state;
@@ -47,6 +48,7 @@ struct GTY(()) target_globals {
   struct target_ira *GTY((skip)) ira;
   struct target_ira_int *GTY((skip)) ira_int;
   struct target_builtins *GTY((skip)) builtins;
+  struct target_gcse *GTY((skip)) gcse;
 };
 
 extern struct target_globals default_target_globals;
@@ -68,6 +70,7 @@ restore_target_globals (struct target_gl
   this_target_ira = g->ira;
   this_target_ira_int = g->ira_int;
   this_target_builtins = g->builtins;
+  this_target_gcse = g->gcse;
 }
 #endif
 
Index: gcc/target-globals.c
===================================================================
--- gcc/target-globals.c	2010-07-07 22:21:40.000000000 +0100
+++ gcc/target-globals.c	2010-07-07 22:29:12.000000000 +0100
@@ -38,6 +38,7 @@ Software Foundation; either version 3, o
 #include "cfgloop.h"
 #include "ira-int.h"
 #include "builtins.h"
+#include "gcse.h"
 
 #if SWITCHABLE_TARGET
 struct target_globals default_target_globals = {
@@ -52,7 +53,8 @@ struct target_globals default_target_glo
   &default_target_cfgloop,
   &default_target_ira,
   &default_target_ira_int,
-  &default_target_builtins
+  &default_target_builtins,
+  &default_target_gcse
 };
 
 struct target_globals *
@@ -73,6 +75,7 @@ save_target_globals (void)
   g->ira = XCNEW (struct target_ira);
   g->ira_int = XCNEW (struct target_ira_int);
   g->builtins = XCNEW (struct target_builtins);
+  g->gcse = XCNEW (struct target_gcse);
   restore_target_globals (g);
   target_reinit ();
   return g;