1 files changed, 106 insertions, 0 deletions
diff --git a/gcc/config/rx/rx-protos.h b/gcc/config/rx/rx-protos.h
index b3c5bfc7a7f..0bb885d2da1 100644
--- a/gcc/config/rx/rx-protos.h
+++ b/gcc/config/rx/rx-protos.h
@@ -63,6 +63,112 @@ extern void		rx_notice_update_cc (rtx, rtx);
 extern void		rx_split_cbranch (machine_mode, enum rtx_code,
 					  rtx, rtx, rtx);
 extern machine_mode	rx_select_cc_mode (enum rtx_code, rtx, rtx);
+
+extern bool rx_reg_dead_or_unused_after_insn (const rtx_insn* i, int regno);
+extern void rx_copy_reg_dead_or_unused_notes (rtx reg, const rtx_insn* src,
+					      rtx_insn* dst);
+
+extern bool rx_fuse_in_memory_bitop (rtx* operands, rtx_insn* curr_insn,
+				     rtx (*gen_insn)(rtx, rtx));
+
+/* Result value of rx_find_set_of_reg.  */
+struct set_of_reg
+{
+  /* The insn where sh_find_set_of_reg stopped looking.
+     Can be NULL_RTX if the end of the insn list was reached.  */
+  rtx_insn* insn;
+
+  /* The set rtx of the specified reg if found, NULL_RTX otherwise.  */
+  const_rtx set_rtx;
+
+  /* The set source rtx of the specified reg if found, NULL_RTX otherwise.
+     Usually, this is the most interesting return value.  */
+  rtx set_src;
+};
+
+/* FIXME: Copy-pasta from SH.  Move to rtl.h.
+   Given a reg rtx and a start insn, try to find the insn that sets
+   the specified reg by using the specified insn stepping function,
+   such as 'prev_nonnote_nondebug_insn_bb'.  When the insn is found,
+   try to extract the rtx of the reg set.  */
+template <typename F> inline set_of_reg
+rx_find_set_of_reg (rtx reg, rtx_insn* insn, F stepfunc,
+		    bool ignore_reg_reg_copies = false)
+{
+  set_of_reg result;
+  result.insn = insn;
+  result.set_rtx = NULL_RTX;
+  result.set_src = NULL_RTX;
+
+  if (!REG_P (reg) || insn == NULL_RTX)
+    return result;
+
+  for (rtx_insn* i = stepfunc (insn); i != NULL_RTX; i = stepfunc (i))
+    {
+      if (BARRIER_P (i))
+	break;
+      if (!INSN_P (i) || DEBUG_INSN_P (i))
+	  continue;
+      if (reg_set_p (reg, i))
+	{
+	  if (CALL_P (i))
+	    break;
+
+	  result.insn = i;
+	  result.set_rtx = set_of (reg, i);
+
+	  if (result.set_rtx == NULL_RTX || GET_CODE (result.set_rtx) != SET)
+	    break;
+
+	  result.set_src = XEXP (result.set_rtx, 1);
+
+	  if (ignore_reg_reg_copies && REG_P (result.set_src))
+	    {
+	      reg = result.set_src;
+	      continue;
+	    }
+	  if (ignore_reg_reg_copies && SUBREG_P (result.set_src)
+	      && REG_P (SUBREG_REG (result.set_src)))
+	    {
+	      reg = SUBREG_REG (result.set_src);
+	      continue;
+	    }
+
+	  break;
+	}
+    }
+
+  /* If the searched reg is found inside a (mem (post_inc:SI (reg))), set_of
+     will return NULL and set_rtx will be NULL.
+     In this case report a 'not found'.  result.insn will always be non-null
+     at this point, so no need to check it.  */
+  if (result.set_src != NULL && result.set_rtx == NULL)
+    result.set_src = NULL;
+
+  return result;
+}
+
+/* FIXME: Move to rtlh.h.  */
+template <typename F> inline rtx_insn*
+rx_find_use_of_reg (rtx reg, rtx_insn* insn, F stepfunc)
+{
+  if (!REG_P (reg) || insn == NULL_RTX)
+    return NULL;
+
+  for (rtx_insn* i = stepfunc (insn); i != NULL_RTX; i = stepfunc (i))
+    {
+      if (BARRIER_P (i))
+	break;
+      if (!INSN_P (i) || DEBUG_INSN_P (i))
+	continue;
+      if (reg_overlap_mentioned_p (reg, PATTERN (i))
+	  || (CALL_P (i) && find_reg_fusage (i, USE, reg)))
+	return i;
+    }
+
+  return NULL;
+}
+
 #endif
 
 #endif /* GCC_RX_PROTOS_H */