Remove libcall notes.

	* see.c (see_analyse_one_def): Do not look for REG_LIBCALL and
	REG_RETVAL notes.
	(see_update_relevancy): Likewise.
	* fwprop.c (try_fwprop_subst): Likewise.
	* rtlanal.c (noop_move_p): Likewise.
	* builtins.c (expand_buitlin_mathfn): Don't try to add REG_EQUAL
	notes to non-existing libcall blocks.
	* cse.c (cse_insn): Change prototype.  Don't update libcall notes.
	Remove orig_set.
	(cse_extended_basic_block): Don't track libcall and no-conflict notes.
	(dead_libcall_p): Remove.
	(delete_trivially_dead_insns): Don't use it.
	* web.c (union_defs): Remove comment about keeping nops.
	* gcse.c (hash_scan_insn): Don't take libcall pointers.
	(compute_hash_table_work): Don't track libcall notes.
	(do_local_cprop): Don't take libcall pointers.  Don't update
	libcall notes.
	(adjust_libcall_notes): Deleted.
	(local_cprop_pass): Remove stack for nested libcalls (which shouldn't
	ever have existed in the first place).
	(replace_store_insn): Don't try to remove libcall notes.
	* lower-subreg.c (move_libcall_note, move_retval_note): Deleted.
	(resolve_reg_notes): Don't call them.
	(resolve_simple_move): Likewise.
	(decompose_multiword_subregs): Remove block handling REG_RETVAL notes.
	Don't remove REG_RETVAL notes.
	* emit-rtl.c (try_split): Don't update libcall notes.
	(emit_copy_of_insn_after): Dito.
	* cselib.c (cselib_current_insn_in_libcall): Remove.
	(cselib_process_insn): Don't set/clear it.
	(new_elt_loc_list): Don't record it.
	(cselib_init): Don't initialize it.
	* cselib.c (struct elt_loc_list): Remove in_libcall field.
	* loop-invariant.c (find_invariant_insn): Don't look for libcall
	notes.
	* sched-deps.c (sched_analyze_insn): Don't group libcall blocks.
	(sched_analyze): Don't set up deps->libcall_block_tail_insn.
	(init_deps): Don't initialize it.
	* sched-int.h (struct deps): Rremove libcall_block_tail_insn field.
	* combine.c (delete_noop_moves): Don't update libcall notes.
	(can_combine_p): Remove now pointless #if 0 block.
	(try_combine): Remove another obsolete #if 0 block.
	(distribute_notes): Don't distribute libcall notes.
	* reg-notes.def (REG_LIBCALL, REG_RETVAL): Remove.
	* dce.c (libcall_dead_p): Remove.
	(delete_unmarked_insns): Don't handle libcall blocks.
	(preserve_libcall_for_dce): Remove.
	(prescan_insns_for_dce): Don't special-case libcall block insns.
	* reload1 (reload): Don't handle libcall notes. 
	* doc/rtl.texi (REG_LIBCALL, REG_RETVAL, REG_LIBCALL_ID): Remove
	documentation.

From-SVN: r136861

1 files changed, 2 insertions, 37 deletions

diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 0bacebc..d6929cf 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -3160,8 +3160,7 @@ try_split (rtx pat, rtx trial, int last)
   rtx before = PREV_INSN (trial);
   rtx after = NEXT_INSN (trial);
   int has_barrier = 0;
-  rtx tem, note_retval, note_libcall;
-  rtx note, seq;
+  rtx note, seq, tem;
   int probability;
   rtx insn_last, insn;
   int njumps = 0;
@@ -3296,30 +3295,6 @@ try_split (rtx pat, rtx trial, int last)
 	  break;
 #endif
 
-	case REG_LIBCALL:
-	  /* Relink the insns with REG_LIBCALL note and with REG_RETVAL note 
-	     after split.  */
-	  REG_NOTES (insn_last) 
-	    = gen_rtx_INSN_LIST (REG_LIBCALL,
-				 XEXP (note, 0),
-				 REG_NOTES (insn_last)); 
-
-	  note_retval = find_reg_note (XEXP (note, 0), REG_RETVAL, NULL);
-	  XEXP (note_retval, 0) = insn_last;
-	  break;
-
-	case REG_RETVAL:
-	  /* Relink the insns with REG_LIBCALL note and with REG_RETVAL note
-	     after split.  */
-	  REG_NOTES (insn_last) 
-	    = gen_rtx_INSN_LIST (REG_RETVAL,
-				 XEXP (note, 0),
-				 REG_NOTES (insn_last)); 
-
-	  note_libcall = find_reg_note (XEXP (note, 0), REG_LIBCALL, NULL);
-	  XEXP (note_libcall, 0) = insn_last;
-	  break;
-
 	default:
 	  break;
 	}
@@ -5501,8 +5476,7 @@ init_emit_once (int line_numbers)
 rtx
 emit_copy_of_insn_after (rtx insn, rtx after)
 {
-  rtx new;
-  rtx note1, note2, link;
+  rtx new, link;
 
   switch (GET_CODE (insn))
     {
@@ -5556,15 +5530,6 @@ emit_copy_of_insn_after (rtx insn, rtx after)
 		 XEXP (link, 0),  REG_NOTES (new));
       }
 
-  /* Fix the libcall sequences.  */
-  if ((note1 = find_reg_note (new, REG_RETVAL, NULL_RTX)) != NULL)
-    {
-      rtx p = new;
-      while ((note2 = find_reg_note (p, REG_LIBCALL, NULL_RTX)) == NULL)
-	p = PREV_INSN (p);
-      XEXP (note1, 0) = p;
-      XEXP (note2, 0) = new;
-    }
   INSN_CODE (new) = INSN_CODE (insn);
   return new;
 }