always define HAVE_epilogue

gcc/ChangeLog:

2015-04-27  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* defaults.h (gen_epilogue): New function.
(HAVE_epilogue): Add default definition to false.
	* alias.c (init_alias_analysis): don't check if HAVE_epilogue is
	defined.
	* cfgrtl.c (cfg_layout_finalize): Likewise.
	* df-scan.c: Likewise.
	* function.c (thread_prologue_and_epilogue_insns): Likewise.
	(reposition_prologue_and_epilogue_notes): Likewise.
	* reorg.c (find_end_label): Likewise.
	* toplev.c: Likewise.

From-SVN: r222506

gcc/ChangeLog

 2015-04-27  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
 
+	* defaults.h (gen_epilogue): New function.
+	* alias.c (init_alias_analysis): don't check if HAVE_epilogue is
+	defined.
+	* cfgrtl.c (cfg_layout_finalize): Likewise.
+	* df-scan.c: Likewise.
+	* function.c (thread_prologue_and_epilogue_insns): Likewise.
+	(reposition_prologue_and_epilogue_notes): Likewise.
+	* reorg.c (find_end_label): Likewise.
+	* toplev.c: Likewise.
+
+2015-04-27  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
+
 	* bb-reorder.c (HAVE_return): Don't check if its undefined.
 	* defaults.h (gen_simple_return): New function.
 	(gen_simple_return): Likewise.

gcc/alias.c

@@ -2925,15 +2925,19 @@ init_alias_analysis (void)
 		{
 		  rtx note, set;
 
-#if defined (HAVE_prologue) || defined (HAVE_epilogue)
+#if defined (HAVE_prologue)
+		  static const bool prologue = true;
+#else
+		  static const bool prologue = false;
+#endif
+
 		  /* The prologue/epilogue insns are not threaded onto the
 		     insn chain until after reload has completed.  Thus,
 		     there is no sense wasting time checking if INSN is in
 		     the prologue/epilogue until after reload has completed.  */
-		  if (reload_completed
+		  if ((prologue || HAVE_epilogue) && reload_completed
 		      && prologue_epilogue_contains (insn))
 		    continue;
-#endif
 
 		  /* If this insn has a noalias note, process it,  Otherwise,
 		     scan for sets.  A simple set will have no side effects

gcc/cfgrtl.c

@@ -4339,11 +4339,7 @@ cfg_layout_finalize (void)
 #endif
   force_one_exit_fallthru ();
   rtl_register_cfg_hooks ();
-  if (reload_completed
-#ifdef HAVE_epilogue
-      && !HAVE_epilogue
-#endif
-      )
+  if (reload_completed && !HAVE_epilogue)
     fixup_fallthru_exit_predecessor ();
   fixup_reorder_chain ();
 

gcc/defaults.h

@@ -1418,6 +1418,16 @@ gen_return ()
 }
 #endif
 
+#ifndef HAVE_epilogue
+#define HAVE_epilogue 0
+static inline rtx
+gen_epilogue ()
+{
+  gcc_unreachable ();
+  return NULL;
+}
+#endif
+
 #endif /* GCC_INSN_FLAGS_H  */
 
 #endif  /* ! GCC_DEFAULTS_H */

gcc/df-scan.c

@@ -62,9 +62,6 @@ along with GCC; see the file COPYING3.  If not see
 typedef struct df_mw_hardreg *df_mw_hardreg_ptr;
 
 
-#ifndef HAVE_epilogue
-#define HAVE_epilogue 0
-#endif
 #ifndef HAVE_prologue
 #define HAVE_prologue 0
 #endif

gcc/function.c

@@ -6066,7 +6066,6 @@ thread_prologue_and_epilogue_insns (void)
   if (exit_fallthru_edge == NULL)
     goto epilogue_done;
 
-#ifdef HAVE_epilogue
   if (HAVE_epilogue)
     {
       start_sequence ();
@@ -6090,7 +6089,6 @@ thread_prologue_and_epilogue_insns (void)
 	set_return_jump_label (returnjump);
     }
   else
-#endif
     {
       basic_block cur_bb;
 
@@ -6183,7 +6181,6 @@ epilogue_done:
     }
 #endif
 
-#ifdef HAVE_epilogue
   if (epilogue_end)
     {
       rtx_insn *insn, *next;
@@ -6201,7 +6198,6 @@ epilogue_done:
 	    reorder_insns (insn, insn, PREV_INSN (epilogue_end));
 	}
     }
-#endif
 
   bitmap_clear (&bb_flags);
 
@@ -6217,8 +6213,11 @@ epilogue_done:
 void
 reposition_prologue_and_epilogue_notes (void)
 {
-#if defined (HAVE_prologue) || defined (HAVE_epilogue) \
-    || defined (HAVE_sibcall_epilogue)
+#if ! defined (HAVE_prologue) && ! defined (HAVE_sibcall_epilogue)
+  if (!HAVE_epilogue)
+    return;
+#endif
+
   /* Since the hash table is created on demand, the fact that it is
      non-null is a signal that it is non-empty.  */
   if (prologue_insn_hash != NULL)
@@ -6315,7 +6314,6 @@ reposition_prologue_and_epilogue_notes (void)
 	    }
 	}
     }
-#endif /* HAVE_prologue or HAVE_epilogue */
 }
 
 /* Returns the name of function declared by FNDECL.  */

gcc/reorg.c

@@ -484,14 +484,12 @@ find_end_label (rtx kind)
 	}
       else
 	{
-#ifdef HAVE_epilogue
 	  if (HAVE_epilogue && ! HAVE_return)
 	    /* The RETURN insn has its delay slot filled so we cannot
 	       emit the label just before it.  Since we already have
 	       an epilogue and cannot emit a new RETURN, we cannot
 	       emit the label at all.  */
 	    return NULL;
-#endif /* HAVE_epilogue */
 
 	  /* Otherwise, make a new label and emit a RETURN and BARRIER,
 	     if needed.  */

gcc/toplev.c

@@ -128,9 +128,6 @@ along with GCC; see the file COPYING3.  If not see
 				   declarations for e.g. AIX 4.x.  */
 #endif
 
-#ifndef HAVE_epilogue
-#define HAVE_epilogue 0
-#endif
 #ifndef HAVE_prologue
 #define HAVE_prologue 0
 #endif