PR rtl-optimization/33644

	* cfgcleanup.c: Do not include dce.h.
	* cfgrtl.c (delete_insn_chain_and_edges): Resurrect.
	* combine.c (distribute_notes): Delete REG_LIBCALL_ID case.
	* dce.c (something_changed): Delete.
	(libcall_dead_p): New predicate.
	(delete_unmarked_insns): Use it to delete dead libcalls.
	Deal with REG_LIBCALL and REG_RETVAL notes.
	(prescan_libcall_for_dce): New function.
	(prescan_insns_for_dce): Use it to deal with libcalls.
	(mark_reg_dependencies): Do nothing special for libcalls.
	(dce_process_block): Likewise.
	(fast_dce): Delete unused local variable.
	(run_fast_dce): Do not return a value.
	* dce.h (struct df): Delete.
	(run_fast_dce): Adjust prototype.
	* optabs.c (libcall_id): Delete.
	(maybe_encapsulate_block): Do not emit REG_LIBCALL_ID notes.
	(emit_no_conflict_block): Do not look for REG_LIBCALL_ID notes.
	* reload1.c (reload): Delete REG_LIBCALL_ID case.
	* rtl.h (delete_insn_chain_and_edges): Resurrect prototype.
	* see.c (see_update_relevancy): Look for REG_LIBCALL and REG_RETVAL
	notes instead of REG_LIBCALL_ID notes.
	* reg-notes.def (LIBCALL_ID): Delete.
	* Makefile.in (see.o): Add dce.h dependency.
	(cfgcleanup.o): Remove dce.h dependency.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@129556 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 0 insertions, 14 deletions

diff --git a/gcc/optabs.c b/gcc/optabs.c
index 7f2b5642ad7..3344b2cfa66 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -99,10 +99,6 @@ static void prepare_float_lib_cmp (rtx *, rtx *, enum rtx_code *,
 				   enum machine_mode *, int *);
 static rtx expand_unop_direct (enum machine_mode, optab, rtx, rtx, int);
 
-/* Current libcall id.  It doesn't matter what these are, as long
-   as they are unique to each libcall that is emitted.  */
-static HOST_WIDE_INT libcall_id = 0;
-
 /* Debug facility for use in GDB.  */
 void debug_optab_libfuncs (void);
 
@@ -3824,12 +3820,6 @@ maybe_encapsulate_block (rtx first, rtx last, rtx equiv)
 						 REG_NOTES (first));
 	  REG_NOTES (last) = gen_rtx_INSN_LIST (REG_RETVAL, first,
 						REG_NOTES (last));
-	  next = NEXT_INSN (last);
-	  for (insn = first; insn != next; insn = NEXT_INSN (insn))
-	    REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_LIBCALL_ID,
-	    				          GEN_INT (libcall_id),
-						  REG_NOTES (insn));
-	  libcall_id++;
 	}
     }
 }
@@ -3890,8 +3880,6 @@ emit_no_conflict_block (rtx insns, rtx target, rtx op0, rtx op1, rtx equiv)
 	remove_note (insn, note);
       if ((note = find_reg_note (insn, REG_RETVAL, NULL)) != NULL)
 	remove_note (insn, note);
-      if ((note = find_reg_note (insn, REG_LIBCALL_ID, NULL)) != NULL)
-	remove_note (insn, note);
 
       data.target = target;
       data.first = insns;
@@ -4044,8 +4032,6 @@ emit_libcall_block (rtx insns, rtx target, rtx result, rtx equiv)
 	remove_note (insn, note);
       if ((note = find_reg_note (insn, REG_RETVAL, NULL)) != NULL)
 	remove_note (insn, note);
-      if ((note = find_reg_note (insn, REG_LIBCALL_ID, NULL)) != NULL)
-	remove_note (insn, note);
 
       next = NEXT_INSN (insn);