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.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@136861 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 3 insertions, 6 deletions

diff --git a/gcc/reload1.c b/gcc/reload1.c
index 7f413665747..48424abb68f 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -1219,9 +1219,8 @@ reload (rtx first, int global)
      notes.  Delete all CLOBBER insns, except those that refer to the return
      value and the special mem:BLK CLOBBERs added to prevent the scheduler
      from misarranging variable-array code, and simplify (subreg (reg))
-     operands.  Also remove all REG_RETVAL and REG_LIBCALL notes since they
-     are no longer useful or accurate.  Strip and regenerate REG_INC notes
-     that may have been moved around.  */
+     operands.  Strip and regenerate REG_INC notes that may have been moved
+     around.  */
 
   for (insn = first; insn; insn = NEXT_INSN (insn))
     if (INSN_P (insn))
@@ -1274,9 +1273,7 @@ reload (rtx first, int global)
 	  {
 	    if (REG_NOTE_KIND (*pnote) == REG_DEAD
 		|| REG_NOTE_KIND (*pnote) == REG_UNUSED
-		|| REG_NOTE_KIND (*pnote) == REG_INC
-		|| REG_NOTE_KIND (*pnote) == REG_RETVAL
-		|| REG_NOTE_KIND (*pnote) == REG_LIBCALL)
+		|| REG_NOTE_KIND (*pnote) == REG_INC)
 	      *pnote = XEXP (*pnote, 1);
 	    else
 	      pnote = &XEXP (*pnote, 1);