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, 1 insertions, 11 deletions

diff --git a/gcc/see.c b/gcc/see.c
index 6ea9f3ed25a..2d664e17cfb 100644
--- a/gcc/see.c
+++ b/gcc/see.c
@@ -3489,12 +3489,6 @@ see_analyze_one_def (rtx insn, enum machine_mode *source_mode,
       if (!reg_set_between_p (source_register, PREV_INSN (prev_insn), insn))
 	return NOT_RELEVANT;
 
-      if (find_reg_note (prev_insn, REG_LIBCALL, NULL_RTX))
-	return NOT_RELEVANT;
-
-      if (find_reg_note (prev_insn, REG_RETVAL, NULL_RTX))
-	return NOT_RELEVANT;
-
       /* If we can't use copy_rtx on the reference it can't be a reference.  */
       if (GET_CODE (PATTERN (prev_insn)) == PARALLEL
 	   && asm_noperands (PATTERN (prev_insn)) >= 0)
@@ -3690,11 +3684,7 @@ see_update_relevancy (void)
 	  unsigned int uid = INSN_UID (insn);
 	  if (INSN_P (insn))
 	    {
-	      if (find_reg_note (insn, REG_LIBCALL, NULL_RTX)
-		  || find_reg_note (insn, REG_RETVAL, NULL_RTX))
-		et = NOT_RELEVANT;
-	      else
-		et = RELEVANT_USE;
+	      et = RELEVANT_USE;
 
 	      for (use_rec = DF_INSN_UID_USES (uid); *use_rec; use_rec++)
 		{