From: Richard Stallman <rms@gnu.org>
Date: Mon, 14 Jun 1993 23:16:31 +0000 (+0000)
Subject: (invalidate_skipped_set): Promote "nonscalar" to "all".
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ffcf63937c553a446e3aaa316094f2dbc32e9b54;p=gcc.git

(invalidate_skipped_set): Promote "nonscalar" to "all".

From-SVN: r4679
---

diff --git a/gcc/cse.c b/gcc/cse.c
index 0e1fe8431c1..d616217d212 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -7323,6 +7323,12 @@ invalidate_skipped_set (dest, set)
   if (GET_CODE (dest) == MEM)
     note_mem_written (dest, &skipped_writes_memory);
 
+  /* There are times when an address can appear varying and be a PLUS
+     during this scan when it would be a fixed address were we to know
+     the proper equivalences.  So promote "nonscalar" to be "all".  */
+  if (skipped_writes_memory.nonscalar)
+    skipped_writes_memory.all = 1;
+
   if (GET_CODE (dest) == REG || GET_CODE (dest) == SUBREG
       || (! skipped_writes_memory.all && ! cse_rtx_addr_varies_p (dest)))
     invalidate (dest);