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, 0 insertions, 11 deletions

diff --git a/gcc/cselib.c b/gcc/cselib.c
index f45803e..69ad207 100644
--- a/gcc/cselib.c
+++ b/gcc/cselib.c
@@ -78,7 +78,6 @@ static htab_t cselib_hash_table;
 /* This is a global so we don't have to pass this through every function.
    It is used in new_elt_loc_list to set SETTING_INSN.  */
 static rtx cselib_current_insn;
-static bool cselib_current_insn_in_libcall;
 
 /* Every new unknown value gets a unique number.  */
 static unsigned int next_unknown_value;
@@ -160,7 +159,6 @@ new_elt_loc_list (struct elt_loc_list *next, rtx loc)
   el->next = next;
   el->loc = loc;
   el->setting_insn = cselib_current_insn;
-  el->in_libcall = cselib_current_insn_in_libcall;
   return el;
 }
 
@@ -1655,8 +1653,6 @@ cselib_process_insn (rtx insn)
   int i;
   rtx x;
 
-  if (find_reg_note (insn, REG_LIBCALL, NULL))
-    cselib_current_insn_in_libcall = true;
   cselib_current_insn = insn;
 
   /* Forget everything at a CODE_LABEL, a volatile asm, or a setjmp.  */
@@ -1667,16 +1663,12 @@ cselib_process_insn (rtx insn)
 	  && GET_CODE (PATTERN (insn)) == ASM_OPERANDS
 	  && MEM_VOLATILE_P (PATTERN (insn))))
     {
-      if (find_reg_note (insn, REG_RETVAL, NULL))
-        cselib_current_insn_in_libcall = false;
       cselib_clear_table ();
       return;
     }
 
   if (! INSN_P (insn))
     {
-      if (find_reg_note (insn, REG_RETVAL, NULL))
-        cselib_current_insn_in_libcall = false;
       cselib_current_insn = 0;
       return;
     }
@@ -1719,8 +1711,6 @@ cselib_process_insn (rtx insn)
       if (GET_CODE (XEXP (x, 0)) == CLOBBER)
 	cselib_invalidate_rtx (XEXP (XEXP (x, 0), 0));
 
-  if (find_reg_note (insn, REG_RETVAL, NULL))
-    cselib_current_insn_in_libcall = false;
   cselib_current_insn = 0;
 
   if (n_useless_values > MAX_USELESS_VALUES
@@ -1769,7 +1759,6 @@ cselib_init (bool record_memory)
   n_used_regs = 0;
   cselib_hash_table = htab_create (31, get_value_hash,
 				   entry_and_rtx_equal_p, NULL);
-  cselib_current_insn_in_libcall = false;
 }
 
 /* Called when the current user is done with cselib.  */