* rtlanal.c (find_reg_equal_equiv_note): New function.

	* simplify-rtx.c (simplify_gen_unary, simplify_gen_ternary): New fns.
	(simplify_gen_relational, simplify_replace_rtx): Likewise.
	* rtl.h: Add declarations for above functions.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@39644 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 17 insertions, 0 deletions

diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index a738acb28a5..0eefa70da52 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -1485,6 +1485,23 @@ find_regno_note (insn, kind, regno)
   return 0;
 }
 
+/* Return a REG_EQUIV or REG_EQUAL note if insn has only a single set and
+   has such a note.  */
+
+rtx
+find_reg_equal_equiv_note (insn)
+     rtx insn;
+{
+  rtx note;
+
+  if (single_set (insn) == 0)
+    return 0;
+  else if ((note = find_reg_note (insn, REG_EQUIV, NULL_RTX)) != 0)
+    return note;
+  else
+    return find_reg_note (insn, REG_EQUAL, NULL_RTX);
+}
+
 /* Return true if DATUM, or any overlap of DATUM, of kind CODE is found
    in the CALL_INSN_FUNCTION_USAGE information of INSN.  */