[PATCH 081/236] hw-doloop: Use rtx_insn (touches config/bfin/bfin.c)

[David Malcolm <dmalcolm at redhat dot com>]

gcc/
	* hw-doloop.h (struct hwloop_info_d): Strengthen fields
	"last_insn", "loop_end" from rtx to rtx_insn *.

	* hw-doloop.c (scan_loop): Likewise for local "insn".
	(discover_loop): Likewise for param "tail_insn".
	(discover_loops): Likewise for local "tail".

	* config/bfin/bfin.c (hwloop_optimize): For now, add a checked
	cast to rtx_insn * when assigning from an rtx local to a
	hwloop_info's "last_insn" field.
---
 gcc/config/bfin/bfin.c | 2 +-
 gcc/hw-doloop.c        | 6 +++---
 gcc/hw-doloop.h        | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/gcc/config/bfin/bfin.c b/gcc/config/bfin/bfin.c
index b037a46..02bd4bd 100644
--- a/gcc/config/bfin/bfin.c
+++ b/gcc/config/bfin/bfin.c
@@ -3654,7 +3654,7 @@ hwloop_optimize (hwloop_info loop)
       last_insn = emit_insn_after (gen_forced_nop (), last_insn);
     }
 
-  loop->last_insn = last_insn;
+  loop->last_insn = as_a_nullable <rtx_insn *> (last_insn);
 
   /* The loop is good for replacement.  */
   start_label = loop->start_label;
diff --git a/gcc/hw-doloop.c b/gcc/hw-doloop.c
index d182761..bb66982 100644
--- a/gcc/hw-doloop.c
+++ b/gcc/hw-doloop.c
@@ -94,7 +94,7 @@ scan_loop (hwloop_info loop)
 
   for (ix = 0; loop->blocks.iterate (ix, &bb); ix++)
     {
-      rtx insn;
+      rtx_insn *insn;
       edge e;
       edge_iterator ei;
 
@@ -232,7 +232,7 @@ add_forwarder_blocks (hwloop_info loop)
    the expected use; targets that call into this code usually replace the
    loop counter with a different special register.  */
 static void
-discover_loop (hwloop_info loop, basic_block tail_bb, rtx tail_insn, rtx reg)
+discover_loop (hwloop_info loop, basic_block tail_bb, rtx_insn *tail_insn, rtx reg)
 {
   bool found_tail;
   unsigned dwork = 0;
@@ -359,7 +359,7 @@ discover_loops (bitmap_obstack *loop_stack, struct hw_doloop_hooks *hooks)
      structure and add the head block to the work list. */
   FOR_EACH_BB_FN (bb, cfun)
     {
-      rtx tail = BB_END (bb);
+      rtx_insn *tail = BB_END (bb);
       rtx insn, reg;
 
       while (tail && NOTE_P (tail) && tail != BB_HEAD (bb))
diff --git a/gcc/hw-doloop.h b/gcc/hw-doloop.h
index 9fc3c15..a98f213 100644
--- a/gcc/hw-doloop.h
+++ b/gcc/hw-doloop.h
@@ -66,10 +66,10 @@ struct GTY (()) hwloop_info_d
   basic_block successor;
 
   /* The last instruction in the tail.  */
-  rtx last_insn;
+  rtx_insn *last_insn;
 
   /* The loop_end insn.  */
-  rtx loop_end;
+  rtx_insn *loop_end;
 
   /* The iteration register.  */
   rtx iter_reg;
-- 
1.8.5.3