toplev.c (no_new_pseudos): Deleted.

2007-07-11  Kenneth Zadeck <zadeck@naturalbridge.com>

	* toplev.c (no_new_pseudos): Deleted.
	* rtl.h (no_new_pseudos): Deleted.
	* tree-pass.h (pass_no_new_pseudos): Deleted. 
	* passes.c (pass_no_new_pseudos): Deleted.
	* final.c (rest_of_clean_state): Removed no_new_pseudos.
	(rest_of_no_new_pseudos, pass_no_new_pseudos): Deleted.
	* struct-equiv.c (rtx_equiv_p): Replaced no_new_pseudos with 
	reload_completed.
	* cfgcleanup.c (try_crossjump_to_edge): Ditto. 
	* rtlhooks.c (gen_lowpart_general): Ditto.
	* optabs.c (prepare_operand): Ditto.
	* mode-switching.c (rest_of_handle_mode_switching): Deleted set of
	no_new_pseudos.
	* modulo-sched.c (rest_of_handle_sms): Ditto.
	* see.c (rest_of_handle_see): Ditto.
	* ifcvt.c (if_convert): Ditto.
	(gate_handle_if_after_combine): Replaced no_new_pseudos with 
	reload_completed.
	* init-regs.c (gate_initialize_regs): Deleted set of
	no_new_pseudos.
	* lower-subreg.c (decompose_multiword_subregs): Ditto. 
	* bb-reorder.c (rest_of_handle_partition_blocks): Ditto.
	* doc/md.texi: Changed no_new_pseudos to can_create_pseudo_p.

From-SVN: r126561

gcc/ChangeLog

@@ -1,3 +1,29 @@
+2007-07-11  Kenneth Zadeck <zadeck@naturalbridge.com>
+
+	* toplev.c (no_new_pseudos): Deleted.
+	* rtl.h (no_new_pseudos): Deleted.
+	* tree-pass.h (pass_no_new_pseudos): Deleted. 
+	* passes.c (pass_no_new_pseudos): Deleted.
+	* final.c (rest_of_clean_state): Removed no_new_pseudos.
+	(rest_of_no_new_pseudos, pass_no_new_pseudos): Deleted.
+	* struct-equiv.c (rtx_equiv_p): Replaced no_new_pseudos with 
+	reload_completed.
+	* cfgcleanup.c (try_crossjump_to_edge): Ditto. 
+	* rtlhooks.c (gen_lowpart_general): Ditto.
+	* optabs.c (prepare_operand): Ditto.
+	* mode-switching.c (rest_of_handle_mode_switching): Deleted set of
+	no_new_pseudos.
+	* modulo-sched.c (rest_of_handle_sms): Ditto.
+	* see.c (rest_of_handle_see): Ditto.
+	* ifcvt.c (if_convert): Ditto.
+	(gate_handle_if_after_combine): Replaced no_new_pseudos with 
+	reload_completed.
+	* init-regs.c (gate_initialize_regs): Deleted set of
+	no_new_pseudos.
+	* lower-subreg.c (decompose_multiword_subregs): Ditto. 
+	* bb-reorder.c (rest_of_handle_partition_blocks): Ditto.
+	* doc/md.texi: Changed no_new_pseudos to can_create_pseudo_p.
+	
 2007-07-11  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/32661

gcc/bb-reorder.c

@@ -2256,9 +2256,7 @@ gate_handle_partition_blocks (void)
 static unsigned int
 rest_of_handle_partition_blocks (void)
 {
-  no_new_pseudos = 0;
   partition_hot_cold_basic_blocks ();
-  no_new_pseudos = 1;
   return 0;
 }
 

gcc/cfgcleanup.c

@@ -1587,7 +1587,7 @@ try_crossjump_to_edge (int mode, edge e1, edge e2)
      partition boundaries).  See the comments at the top of
      bb-reorder.c:partition_hot_cold_basic_blocks for complete details.  */
 
-  if (flag_reorder_blocks_and_partition && no_new_pseudos)
+  if (flag_reorder_blocks_and_partition && reload_completed)
     return false;
 
   /* Search backward through forwarder blocks.  We don't need to worry

gcc/doc/md.texi

@@ -3435,8 +3435,8 @@ it can be allocated using @code{gen_reg_rtx} prior to life analysis.
 If there are cases which need scratch registers during or after reload,
 you must provide an appropriate secondary_reload target hook.
 
-@findex no_new_pseudos
+@findex can_create_pseudo_p
-The global variable @code{no_new_pseudos} can be used to determine if it
+The macro @code{can_create_pseudo_p} can be used to determine if it
 is unsafe to create new pseudo registers.  If this variable is nonzero, then
 it is unsafe to call @code{gen_reg_rtx} to allocate a new pseudo.
 

gcc/final.c

@@ -4091,7 +4091,6 @@ rest_of_clean_state (void)
 
   reload_completed = 0;
   epilogue_completed = 0;
-  no_new_pseudos = 0;
 #ifdef STACK_REGS
   regstack_completed = 0;
 #endif
@@ -4147,27 +4146,3 @@ struct tree_opt_pass pass_clean_state =
   0                                     /* letter */
 };
 
-/* Set no_new_pseudos.  */
-static unsigned int
-rest_of_no_new_pseudos (void)
-{
-  no_new_pseudos = 1;
-  return 0;
-}
-
-struct tree_opt_pass pass_no_new_pseudos =
-{
-  NULL,			                /* name */
-  NULL,                                 /* gate */
-  rest_of_no_new_pseudos,               /* execute */
-  NULL,                                 /* sub */
-  NULL,                                 /* next */
-  0,                                    /* static_pass_number */
-  0,                                    /* tv_id */
-  0,                                    /* properties_required */
-  0,                                    /* properties_provided */
-  0,                                    /* properties_destroyed */
-  0,                                    /* todo_flags_start */
-  0,                                    /* todo_flags_finish */
-  'p'                                   /* letter */
-};

gcc/ifcvt.c

@@ -3968,10 +3968,6 @@ if_convert (bool recompute_dominance)
   num_updated_if_blocks = 0;
   num_true_changes = 0;
 
-  /* Some transformations in this pass can create new pseudos,
-     if the pass runs before reload.  Make sure we can do so.  */
-  gcc_assert (! no_new_pseudos || reload_completed);
-
   loop_optimizer_init (AVOID_CFG_MODIFICATIONS);
   mark_loop_exit_edges ();
   loop_optimizer_finalize ();
@@ -4105,9 +4101,7 @@ gate_handle_if_after_combine (void)
 static unsigned int
 rest_of_handle_if_after_combine (void)
 {
-  no_new_pseudos = 0;
   if_convert (true);
-  no_new_pseudos = 1;
   return 0;
 }
 

gcc/init-regs.c

@@ -132,9 +132,7 @@ gate_initialize_regs (void)
 static unsigned int
 rest_of_handle_initialize_regs (void)
 {
-  no_new_pseudos = 0;
   initialize_uninitialized_regs ();
-  no_new_pseudos = 1;
   return 0;
 }
 

gcc/lower-subreg.c

@@ -1070,7 +1070,6 @@ decompose_multiword_subregs (void)
   bitmap_and_compl_into (decomposable_context, non_decomposable_context);
   if (!bitmap_empty_p (decomposable_context))
     {
-      int hold_no_new_pseudos = no_new_pseudos;
       sbitmap sub_blocks;
       unsigned int i;
       sbitmap_iterator sbi;
@@ -1079,7 +1078,6 @@ decompose_multiword_subregs (void)
 
       propagate_pseudo_copies ();
 
-      no_new_pseudos = 0;
       sub_blocks = sbitmap_alloc (last_basic_block);
       sbitmap_zero (sub_blocks);
 
@@ -1185,8 +1183,6 @@ decompose_multiword_subregs (void)
 	    }
 	}
 
-      no_new_pseudos = hold_no_new_pseudos;
-
       /* If we had insns to split that caused control flow insns in the middle
 	 of a basic block, split those blocks now.  Note that we only handle
 	 the case where splitting a load has caused multiple possibly trapping

gcc/mode-switching.c

@@ -740,9 +740,7 @@ static unsigned int
 rest_of_handle_mode_switching (void)
 {
 #ifdef OPTIMIZE_MODE_SWITCHING
-  no_new_pseudos = 0;
   optimize_mode_switching ();
-  no_new_pseudos = 1;
 #endif /* OPTIMIZE_MODE_SWITCHING */
   return 0;
 }

gcc/modulo-sched.c

@@ -2472,15 +2472,12 @@ rest_of_handle_sms (void)
 #ifdef INSN_SCHEDULING
   basic_block bb;
 
-  /* We want to be able to create new pseudos.  */
-  no_new_pseudos = 0;
   /* Collect loop information to be used in SMS.  */
   cfg_layout_initialize (0);
   sms_schedule ();
 
   /* Update the life information, because we add pseudos.  */
   max_regno = max_reg_num ();
-  no_new_pseudos = 1;
 
   /* Finalize layout changes.  */
   FOR_EACH_BB (bb)

gcc/optabs.c

@@ -3953,7 +3953,7 @@ prepare_operand (int icode, rtx x, int opnum, enum machine_mode mode,
   if (!insn_data[icode].operand[opnum].predicate
       (x, insn_data[icode].operand[opnum].mode))
     {
-      if (no_new_pseudos)
+      if (reload_completed)
 	return NULL_RTX;
       x = copy_to_mode_reg (insn_data[icode].operand[opnum].mode, x);
     }

gcc/passes.c

@@ -727,7 +727,6 @@ init_optimization_passes (void)
       NEXT_PASS (pass_regclass_init);
       NEXT_PASS (pass_inc_dec);
       NEXT_PASS (pass_initialize_regs);
-      NEXT_PASS (pass_no_new_pseudos);
       NEXT_PASS (pass_outof_cfg_layout_mode);
       NEXT_PASS (pass_ud_rtl_dce);
       NEXT_PASS (pass_combine);

gcc/rtl.h

@@ -1977,10 +1977,6 @@ extern int regstack_completed;
    the same indirect address eventually.  */
 extern int cse_not_expected;
 
-/* Set to nonzero before life analysis to indicate that it is unsafe to
-   generate any new pseudo registers.  */
-extern int no_new_pseudos;
-
 /* Translates rtx code to tree code, for those codes needed by
    REAL_ARITHMETIC.  The function returns an int because the caller may not
    know what `enum tree_code' means.  */

gcc/rtlhooks.c

@@ -66,7 +66,7 @@ gen_lowpart_general (enum machine_mode mode, rtx x)
 	  && SCALAR_INT_MODE_P (GET_MODE (x))
 	  && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode),
 				    GET_MODE_BITSIZE (GET_MODE (x)))
-	  && ! no_new_pseudos)
+	  && !reload_completed)
 	return gen_lowpart_general (mode, force_reg (GET_MODE (x), x));
 
       if (WORDS_BIG_ENDIAN)

gcc/see.c

@@ -3814,12 +3814,7 @@ gate_handle_see (void)
 static unsigned int
 rest_of_handle_see (void)
 {
-  int no_new_pseudos_bcp = no_new_pseudos;
-
-  no_new_pseudos = 0;
   see_main ();
-  no_new_pseudos = no_new_pseudos_bcp;
-  
   run_fast_dce ();
   return 0;
 }

gcc/struct-equiv.c

@@ -431,7 +431,7 @@ rtx_equiv_p (rtx *xp, rtx y, int rvalue, struct equiv_info *info)
 	  return false;
 	else if (x_common_live)
 	  {
-	    if (! rvalue || info->input_cost < 0 || no_new_pseudos)
+	    if (! rvalue || info->input_cost < 0 || reload_completed)
 	      return false;
 	    /* If info->live_update is not set, we are processing notes.
 	       We then allow a match with x_input / y_input found in a

gcc/toplev.c

@@ -149,9 +149,6 @@ location_t input_location;
 
 struct line_maps line_table;
 
-/* Nonzero if it is unsafe to create any new pseudo registers.  */
-int no_new_pseudos;
-
 /* Stack of currently pending input files.  */
 
 struct file_stack *input_file_stack;

gcc/tree-pass.h

@@ -384,7 +384,6 @@ extern struct tree_opt_pass pass_regclass_init;
 extern struct tree_opt_pass pass_subregs_of_mode_init;
 extern struct tree_opt_pass pass_subregs_of_mode_finish;
 extern struct tree_opt_pass pass_inc_dec;
-extern struct tree_opt_pass pass_no_new_pseudos;
 extern struct tree_opt_pass pass_stack_ptr_mod;
 extern struct tree_opt_pass pass_initialize_regs;
 extern struct tree_opt_pass pass_combine;