(copy_rtx): A MEM with constant address is not sharable.

Undo Dec 27 change. From-SVN: r3231

(copy_rtx): A MEM with constant address is not sharable.
Undo Dec 27 change. From-SVN: r3231
cc81e625 · Jim Wilson · 1dde5fd2 · cc81e625
Commit cc81e625 authored Jan 14, 1993 by Jim Wilson
Hide whitespace changes
Inline Side-by-side

Showing with 4 additions and 4 deletions

gcc/rtl.c
+4 -4

No files found.
--- a/gcc/rtl.c
+++ b/gcc/rtl.c
@@ -284,10 +284,10 @@ copy_rtx (orig)
 	return orig;
      break;
-    case MEM:
+      /* A MEM with a constant address is not sharable.  The problem is that
-      if (CONSTANT_ADDRESS_P (XEXP (orig, 0)))
+	 the constant address may need to be reloaded.  If the mem is shared,
-	return orig;
+	 then reloading one copy of this mem will cause all copies to appear
-      break;
+	 to have been reloaded.  */
    }
  copy = rtx_alloc (code);