df-scan.c (df_get_exit-block_use_set): Always add the stack pointer to the exit block use set.

2007-06-12 Seongbae Park <seongbae.park@gmail.com>

       * df-scan.c (df_get_exit-block_use_set): Always add the stack pointer
       to the exit block use set.
       * gcse.c (cpro_jump): Don't emit barrier in cfglayout mode.
       * config/sparc/sparc.c (sparc_check_64): Check df != NULL.

From-SVN: r125658

gcc/ChangeLog

+2007-06-12 Seongbae Park <seongbae.park@gmail.com>
+
+       * df-scan.c (df_get_exit-block_use_set): Always add the stack pointer
+       to the exit block use set.
+       * gcse.c (cpro_jump): Don't emit barrier in cfglayout mode.
+       * config/sparc/sparc.c (sparc_check_64): Check df != NULL.
+
 2007-06-12  Seongbae Park  <seongbae.park@gmail.com>
 
 	* opts.c (common_handle_option): Handle new option -fdbg-cnt-list.

gcc/config/sparc/sparc.c

@@ -7674,7 +7674,7 @@ sparc_check_64 (rtx x, rtx insn)
     y = gen_rtx_REG (SImode, REGNO (x) + WORDS_BIG_ENDIAN);
 
   if (flag_expensive_optimizations
-      && DF_REG_DEF_COUNT (REGNO (y)) == 1)
+      && df && DF_REG_DEF_COUNT (REGNO (y)) == 1)
     set_once = 1;
 
   if (insn == 0)

gcc/df-scan.c

@@ -1005,7 +1005,7 @@ df_insn_delete (basic_block bb, unsigned int uid)
 	  bitmap_set_bit (df->insns_to_delete, uid);
 	}
       if (dump_file)
-	fprintf (dump_file, "defering deletion of insn with uid = %d.\n", uid);
+	fprintf (dump_file, "deferring deletion of insn with uid = %d.\n", uid);
       return;
     }
 
@@ -1116,7 +1116,7 @@ df_insn_rescan (rtx insn)
 	  insn_info->mw_hardregs = df_null_mw_rec;
 	}
       if (dump_file)
-	fprintf (dump_file, "defering rescan insn with uid = %d.\n", uid);
+	fprintf (dump_file, "deferring rescan insn with uid = %d.\n", uid);
     
       bitmap_clear_bit (df->insns_to_delete, uid);
       bitmap_clear_bit (df->insns_to_notes_rescan, uid);
@@ -3682,18 +3682,9 @@ df_get_exit_block_use_set (bitmap exit_block_uses)
   unsigned int i; 
 
   bitmap_clear (exit_block_uses);
-  
-  /* If exiting needs the right stack value, consider the stack
-     pointer live at the end of the function.  */
-  if ((HAVE_epilogue && epilogue_completed)
-      || !EXIT_IGNORE_STACK
-      || (!FRAME_POINTER_REQUIRED
-	  && !current_function_calls_alloca
-	  && flag_omit_frame_pointer)
-      || current_function_sp_is_unchanging)
-    {
-      bitmap_set_bit (exit_block_uses, STACK_POINTER_REGNUM);
-    }
+
+  /* Stack pointer is always live at the exit.  */
+  bitmap_set_bit (exit_block_uses, STACK_POINTER_REGNUM);
   
   /* Mark the frame pointer if needed at the end of the function.
      If we end up eliminating it, it will be removed from the live

gcc/gcse.c

@@ -2850,12 +2850,6 @@ cprop_jump (basic_block bb, rtx setcc, rtx jump, rtx from, rtx src)
       /* Remove REG_EQUAL note after simplification.  */
       if (note_src)
 	remove_note (jump, note);
-
-      /* If this has turned into an unconditional jump,
-	 then put a barrier after it so that the unreachable
-	 code will be deleted.  */
-      if (GET_CODE (SET_SRC (set)) == LABEL_REF)
-	emit_barrier_after (jump);
      }
 
 #ifdef HAVE_cc0