cfgcleanup.c (thread_jump): Update call of cselib_init.

	* cfgcleanup.c (thread_jump): Update call of cselib_init.
	* cselib.c (cselib_record_memory): New static variable.
	(cselib_lookup_mem, cselib_record_set, cselib_record_sets):
	Give up on memories when asked for.
	(cselib_init): Accept new argument.
	* cselib.h (cselib_init): Update prototype.
	* gcse.c (local_cprop_pass): Update call of cselib_init.
	* loop.c (load_mems): Update call of cselib_init.
	* postreload.c (reload_cse_regs_1): Update call of cselib_init.
	* sched-deps.c (sched_analyze): Update call of cselib_init.

From-SVN: r78917

gcc/ChangeLog

+2004-03-04  Jan Hubicka  <jh@suse.cz>
+
+	* cfgcleanup.c (thread_jump): Update call of cselib_init.
+	* cselib.c (cselib_record_memory): New static variable.
+	(cselib_lookup_mem, cselib_record_set, cselib_record_sets):
+	Give up on memories when asked for.
+	(cselib_init): Accept new argument.
+	* cselib.h (cselib_init): Update prototype.
+	* gcse.c (local_cprop_pass): Update call of cselib_init.
+	* loop.c (load_mems): Update call of cselib_init.
+	* postreload.c (reload_cse_regs_1): Update call of cselib_init.
+	* sched-deps.c (sched_analyze): Update call of cselib_init.
+
 2004-03-04  David Edelsohn  <edelsohn@gnu.org>
 	    GP <gp@qnx.com>
 

gcc/cfgcleanup.c

@@ -349,7 +349,7 @@ thread_jump (int mode, edge e, basic_block b)
 	return NULL;
       }
 
-  cselib_init ();
+  cselib_init (false);
 
   /* First process all values computed in the source basic block.  */
   for (insn = NEXT_INSN (BB_HEAD (e->src)); insn != NEXT_INSN (BB_END (e->src));

gcc/cselib.c

@@ -42,6 +42,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include "params.h"
 #include "alloc-pool.h"
 
+static bool cselib_record_memory;
 static int entry_and_rtx_equal_p (const void *, const void *);
 static hashval_t get_value_hash (const void *);
 static struct elt_list *new_elt_list (struct elt_list *, cselib_val *);
@@ -748,6 +749,7 @@ cselib_lookup_mem (rtx x, int create)
   struct elt_list *l;
 
   if (MEM_VOLATILE_P (x) || mode == BLKmode
+      || !cselib_record_memory
       || (FLOAT_MODE_P (mode) && flag_float_store))
     return 0;
 
@@ -1201,7 +1203,8 @@ cselib_record_set (rtx dest, cselib_val *src_elt, cselib_val *dest_addr_elt)
 	n_useless_values--;
       src_elt->locs = new_elt_loc_list (src_elt->locs, dest);
     }
-  else if (GET_CODE (dest) == MEM && dest_addr_elt != 0)
+  else if (GET_CODE (dest) == MEM && dest_addr_elt != 0
+	   && cselib_record_memory)
     {
       if (src_elt->locs == 0)
 	n_useless_values--;
@@ -1275,7 +1278,8 @@ cselib_record_sets (rtx insn)
 	sets[i].dest = dest = XEXP (dest, 0);
 
       /* We don't know how to record anything but REG or MEM.  */
-      if (GET_CODE (dest) == REG || GET_CODE (dest) == MEM)
+      if (GET_CODE (dest) == REG
+	  || (GET_CODE (dest) == MEM && cselib_record_memory))
         {
 	  rtx src = sets[i].src;
 	  if (cond)
@@ -1320,7 +1324,8 @@ cselib_record_sets (rtx insn)
   for (i = 0; i < n_sets; i++)
     {
       rtx dest = sets[i].dest;
-      if (GET_CODE (dest) == REG || GET_CODE (dest) == MEM)
+      if (GET_CODE (dest) == REG
+	  || (GET_CODE (dest) == MEM && cselib_record_memory))
 	cselib_record_set (dest, sets[i].src_elt, sets[i].dest_addr_elt);
     }
 }
@@ -1398,7 +1403,7 @@ cselib_process_insn (rtx insn)
    init_alias_analysis.  */
 
 void
-cselib_init (void)
+cselib_init (bool record_memory)
 {
   elt_list_pool = create_alloc_pool ("elt_list", 
 				     sizeof (struct elt_list), 10);
@@ -1408,6 +1413,7 @@ cselib_init (void)
 				       sizeof (cselib_val), 10);
   value_pool = create_alloc_pool ("value", 
 				  RTX_SIZE (VALUE), 100);
+  cselib_record_memory = record_memory;
   /* This is only created once.  */
   if (! callmem)
     callmem = gen_rtx_MEM (BLKmode, const0_rtx);

gcc/cselib.h

@@ -64,7 +64,7 @@ struct elt_list GTY(())
 };
 
 extern cselib_val *cselib_lookup (rtx, enum machine_mode, int);
-extern void cselib_init (void);
+extern void cselib_init (bool record_memory);
 extern void cselib_finish (void);
 extern void cselib_process_insn (rtx);
 extern enum machine_mode cselib_reg_set_mode (rtx);

gcc/gcse.c

@@ -4407,7 +4407,7 @@ local_cprop_pass (int alter_jumps)
   rtx libcall_stack[MAX_NESTED_LIBCALLS + 1], *libcall_sp;
   bool changed = false;
 
-  cselib_init ();
+  cselib_init (false);
   libcall_sp = &libcall_stack[MAX_NESTED_LIBCALLS];
   *libcall_sp = 0;
   for (insn = get_insns (); insn; insn = NEXT_INSN (insn))

gcc/loop.c

@@ -9797,7 +9797,7 @@ load_mems (const struct loop *loop)
     ;
   prev_ebb_head = p;
 
-  cselib_init ();
+  cselib_init (true);
 
   /* Build table of mems that get set to constant values before the
      loop.  */

gcc/postreload.c

@@ -181,7 +181,7 @@ reload_cse_regs_1 (rtx first)
   rtx insn;
   rtx testreg = gen_rtx_REG (VOIDmode, -1);
 
-  cselib_init ();
+  cselib_init (true);
   init_alias_analysis ();
 
   for (insn = first; insn; insn = NEXT_INSN (insn))

gcc/sched-deps.c

@@ -1156,7 +1156,7 @@ sched_analyze (struct deps *deps, rtx head, rtx tail)
   rtx loop_notes = 0;
 
   if (current_sched_info->use_cselib)
-    cselib_init ();
+    cselib_init (true);
 
   for (insn = head;; insn = NEXT_INSN (insn))
     {