cse.c (cse_set_around_loop): When changing a constant load to a register…

cse.c (cse_set_around_loop): When changing a constant load to a register -register copy, add a REG_EQUAL note.

	* cse.c (cse_set_around_loop): When changing a constant load
	to a register -register copy, add a REG_EQUAL note.

From-SVN: r74007

gcc/ChangeLog

+2003-11-27  J"orn Rennecke <joern.rennecke@superh.com>
+
+	* cse.c (cse_set_around_loop): When changing a constant load
+	to a register -register copy, add a REG_EQUAL note.
+
 2003-11-27  Randolph Chung  <tausq@debian.org>
 	    John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 

gcc/cse.c

@@ -6676,6 +6676,10 @@ cse_set_around_loop (rtx x, rtx insn, rtx loop_start)
 			  }
 			else
 			  {
+			    if (CONSTANT_P (SET_SRC (set))
+				&& ! find_reg_equal_equiv_note (insn))
+			      set_unique_reg_note (insn, REG_EQUAL,
+						   SET_SRC (set));
 			    if (control_flow_insn_p (p))
 			      /* p can cause a control flow transfer so it
 				 is the last insn of a basic block.  We can't