rtl.texi: Removed reference to REG_NO_CONFLICT notes.

2008-05-14  Kenneth Zadeck <zadeck@naturalbridge.com>

	* doc/rtl.texi: Removed reference to REG_NO_CONFLICT notes.
	* optabs.c (expand_binop, expand_absneg_bit, expand_unop,
	expand_copysign_bit, ): Change call to emit_no_conflict_block to
	emit_insn and remove unneeded code to construct extra args.
	(emit_no_conflict_block): Removed.
	* optabls.h: (emit_no_conflict_block): Removed.
	* cse.c (cse_extended_basic_block): Remove search for
	REG_NO_CONFLICT note.  
	* global.c: Removed incorrect comment added in revision 117.
	* expr.c (convert_move): Change call to emit_no_conflict_block to
	emit_insn.
	* recog.c: Change comments so that they do not mention
	REG_NO_CONFLICT.
	* local_alloc.c (combine_regs): Removed last parameter.
	(no_conflict_p): Removed.
	(block_alloc): Removed note, no_conflict_combined_regno and set
	local vars. Removed all code to process REG_NO_CONFLICT blocks.
	(combine_regs): Removed already_dead and code to look for
	REG_NO_CONFLICT notes.
	* lower_subreg (remove_retval_note): Removed code to look for
	REG_NO_CONFLICT block.
	(resolve_reg_notes): Removed REG_NO_CONFLICT case.
	(resolve_clobber): Remove code to process libcalls that have
	REG_NO_CONFLICT notes.
	* loop_invariant.c (find_invariant_insn): Removed REG_NO_CONFLICT
	case.
	* combine.c (can_combine_p, distribute_notes):  Removed REG_NO_CONFLICT
	case.
	* config/cris/cris.md (movdi pattern): Changed
	emit_no_conflict_block to emit_insns.
	* config/mn10300/mn10300.md (absdf2, negdf2 patterns): Ditto.
	* config/m68k/m68k.md (negdf2, negxf2, absdf2, absxf2 patterns):
	Ditto. 
	* reg-notes.def (NO_CONFLICT): Removed.

From-SVN: r135289

1 files changed, 2 insertions, 27 deletions

diff --git a/gcc/lower-subreg.c b/gcc/lower-subreg.c
index c3b29a8..2192260 100644
--- a/gcc/lower-subreg.c
+++ b/gcc/lower-subreg.c
@@ -586,7 +586,7 @@ move_libcall_note (rtx old_start, rtx new_start)
 static void
 remove_retval_note (rtx insn1)
 {
-  rtx note0, insn0, note1, insn;
+  rtx note0, insn0, note1;
 
   note1 = find_reg_note (insn1, REG_RETVAL, NULL);
   if (note1 == NULL_RTX)
@@ -597,19 +597,6 @@ remove_retval_note (rtx insn1)
 
   remove_note (insn0, note0);
   remove_note (insn1, note1);
-
-  for (insn = insn0; insn != insn1; insn = NEXT_INSN (insn))
-    {
-      while (1)
-	{
-	  rtx note;
-
-	  note = find_reg_note (insn, REG_NO_CONFLICT, NULL);
-	  if (note == NULL_RTX)
-	    break;
-	  remove_note (insn, note);
-	}
-    }
 }
 
 /* Resolve any decomposed registers which appear in register notes on
@@ -642,7 +629,6 @@ resolve_reg_notes (rtx insn)
       note = *pnote;
       switch (REG_NOTE_KIND (note))
 	{
-	case REG_NO_CONFLICT:
 	case REG_DEAD:
 	case REG_UNUSED:
 	  if (resolve_reg_p (XEXP (note, 0)))
@@ -897,7 +883,7 @@ resolve_simple_move (rtx set, rtx insn)
 static bool
 resolve_clobber (rtx pat, rtx insn)
 {
-  rtx reg, note;
+  rtx reg;
   enum machine_mode orig_mode;
   unsigned int words, i;
   int ret;
@@ -906,17 +892,6 @@ resolve_clobber (rtx pat, rtx insn)
   if (!resolve_reg_p (reg) && !resolve_subreg_p (reg))
     return false;
 
-  /* If this clobber has a REG_LIBCALL note, then it is the initial
-     clobber added by emit_no_conflict_block.  We were able to
-     decompose the register, so we no longer need the clobber.  */
-  note = find_reg_note (insn, REG_LIBCALL, NULL_RTX);
-  if (note != NULL_RTX)
-    {
-      remove_retval_note (XEXP (note, 0));
-      delete_insn (insn);
-      return true;
-    }
-
   orig_mode = GET_MODE (reg);
   words = GET_MODE_SIZE (orig_mode);
   words = (words + UNITS_PER_WORD - 1) / UNITS_PER_WORD;