From: J"orn Rennecke <amylaar@cygnus.co.uk>
Date: Tue, 12 May 1998 19:28:01 +0000 (+0000)
Subject: * reload1.c (gen_reload): Create REG_EQUIV notes.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4117a96b0138514a300f79c3deb1b4145ea03e2a;p=gcc.git

* reload1.c (gen_reload): Create REG_EQUIV notes.

From-SVN: r19703
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fcb71468b20..5b4027319ab 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Wed May 13 03:23:45 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* reload1.c (gen_reload): Create REG_EQUIV notes.
+
 Tue May 12 22:21:07 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
 
 	* reload1.c (reload): Fix check for USEs to use code of pattern.
diff --git a/gcc/reload1.c b/gcc/reload1.c
index fe0c7b241ba..02b9087ce1d 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -7244,13 +7244,19 @@ gen_reload (out, in, opnum, type)
 	     its validity determination, i.e., the way it would after reload
 	     has completed.  */
 	  if (constrain_operands (code, 1))
-	    return insn;
+	    {
+	      /* Add a REG_EQUIV note so that find_equiv_reg can find it.  */
+	      REG_NOTES (insn)
+		= gen_rtx (EXPR_LIST, REG_EQUIV, in, REG_NOTES (insn));
+	      return insn;
+	    }
 	}
 
       delete_insns_since (last);
 
       gen_reload (out, op1, opnum, type);
-      emit_insn (gen_add2_insn (out, op0));
+      insn = emit_insn (gen_add2_insn (out, op0));
+      REG_NOTES (insn) = gen_rtx (EXPR_LIST, REG_EQUIV, in, REG_NOTES (insn));
     }
 
 #ifdef SECONDARY_MEMORY_NEEDED