last_call_insn returns an rtx_call_insn *

2014-08-19  David Malcolm  <dmalcolm@redhat.com>

	* emit-rtl.c (last_call_insn): Strengthen return type from rtx to
	rtx_call_insn *.
	* rtl.h (is_a_helper <rtx_call_insn *>::test): New overload,
	accepting an rtx_insn *.
	(last_call_insn): Strengthen return type from rtx to
	rtx_call_insn *.

From-SVN: r214186

gcc/ChangeLog

 2014-08-19  David Malcolm  <dmalcolm@redhat.com>
 
+	* emit-rtl.c (last_call_insn): Strengthen return type from rtx to
+	rtx_call_insn *.
+	* rtl.h (is_a_helper <rtx_call_insn *>::test): New overload,
+	accepting an rtx_insn *.
+	(last_call_insn): Strengthen return type from rtx to
+	rtx_call_insn *.
+
+2014-08-19  David Malcolm  <dmalcolm@redhat.com>
+
 	* rtl.h (delete_trivially_dead_insns): Strengthen initial param
 	"insns" from rtx to rtx_insn *.
 	* cse.c (delete_trivially_dead_insns): Likewise, also do it for

gcc/emit-rtl.c

@@ -3382,17 +3382,17 @@ prev_real_insn (rtx insn)
 /* Return the last CALL_INSN in the current list, or 0 if there is none.
    This routine does not look inside SEQUENCEs.  */
 
-rtx
+rtx_call_insn *
 last_call_insn (void)
 {
-  rtx insn;
+  rtx_insn *insn;
 
   for (insn = get_last_insn ();
        insn && !CALL_P (insn);
        insn = PREV_INSN (insn))
     ;
 
-  return insn;
+  return safe_as_a <rtx_call_insn *> (insn);
 }
 
 /* Find the next insn after INSN that really does something.  This routine

gcc/rtl.h

@@ -734,6 +734,14 @@ is_a_helper <rtx_call_insn *>::test (rtx rt)
 template <>
 template <>
 inline bool
+is_a_helper <rtx_call_insn *>::test (rtx_insn *insn)
+{
+  return CALL_P (insn);
+}
+
+template <>
+template <>
+inline bool
 is_a_helper <rtx_jump_table_data *>::test (rtx rt)
 {
   return JUMP_TABLE_DATA_P (rt);
@@ -2416,7 +2424,7 @@ extern rtx gen_use (rtx);
 extern rtx emit_use (rtx);
 extern rtx make_insn_raw (rtx);
 extern void add_function_usage_to (rtx, rtx);
-extern rtx last_call_insn (void);
+extern rtx_call_insn *last_call_insn (void);
 extern rtx_insn *previous_insn (rtx);
 extern rtx_insn *next_insn (rtx);
 extern rtx_insn *prev_nonnote_insn (rtx);