From: Richard Kenner <kenner@gcc.gnu.org>
Date: Sun, 27 Dec 1992 11:52:59 +0000 (-0500)
Subject: (copy_rtx_if_shared): A CONST can be shared if it contains a
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b851ea098ed463f18e1534b8295ef666f6c7916d;p=gcc.git

(copy_rtx_if_shared): A CONST can be shared if it contains a
SYBOL_REF.

From-SVN: r2923
---

diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 1335308ce87..8291da1b6e4 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -1267,6 +1267,15 @@ copy_rtx_if_shared (orig)
       /* SCRATCH must be shared because they represent distinct values. */
       return x;
 
+    case CONST:
+      /* CONST can be shared if it contains a SYMBOL_REF.  If it contains
+	 a LABEL_REF, it isn't sharable.  */
+      if (GET_CODE (XEXP (x, 0)) == PLUS
+	  && GET_CODE (XEXP (XEXP (x, 0), 0)) == SYMBOL_REF
+	  && GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT)
+	return x;
+      break;
+
     case INSN:
     case JUMP_INSN:
     case CALL_INSN: