From: amylaar <amylaar@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 27 Nov 2003 21:45:26 +0000 (+0000)
Subject: 	* cse.c (cse_set_around_loop): When changing a constant load
X-Git-Url: http://git.sourceforge.jp/view?p=pf3gnuchains%2Fgcc-fork.git;a=commitdiff_plain;h=9ed780b5233d88c7970f9c8d248cbcf44f2909d5

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


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@74007 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4af2b9288dc..e7a93937b1c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+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>
 
diff --git a/gcc/cse.c b/gcc/cse.c
index 7612a5a7ed5..faaf187b32c 100644
--- a/gcc/cse.c
+++ b/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