* gcse.c (oprs_unchanged_p): Respect flag_gcse_lm.

	(record_last_mem_set_info): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@197012 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 387ccf3758afc3e3bed2a3ff9ab1135a3561bff2..60749994051a9bc890350f570bde7358219bce81 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 2013-03-23  Steven Bosscher  <steven@gcc.gnu.org>
 
+       * gcse.c (oprs_unchanged_p): Respect flag_gcse_lm.
+       (record_last_mem_set_info): Likewise.
+
        * df-core.c (rest_of_handle_df_initialize): Use XCNEWVEC instead
        of XNEWVEC followed by memset.
        (df_worklist_dataflow): Use XNEWVEC instead of xmalloc with a cast.

diff --git a/gcc/gcse.c b/gcc/gcse.c
index e0bd200c23035e7e68574343c0882c4469e9234b..0c176f69f48ca19d521c167c200f40dd9638451c 100644 (file)
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -890,8 +890,9 @@ oprs_unchanged_p (const_rtx x, const_rtx insn, int avail_p)
       }
 
     case MEM:
-      if (load_killed_in_block_p (current_bb, DF_INSN_LUID (insn),
-                                 x, avail_p))
+      if (! flag_gcse_lm
+         || load_killed_in_block_p (current_bb, DF_INSN_LUID (insn),
+                                    x, avail_p))
        return 0;
       else
        return oprs_unchanged_p (XEXP (x, 0), insn, avail_p);
@@ -1471,10 +1472,14 @@ canon_list_insert (rtx dest ATTRIBUTE_UNUSED, const_rtx x ATTRIBUTE_UNUSED,
 static void
 record_last_mem_set_info (rtx insn)
 {
-  int bb = BLOCK_FOR_INSN (insn)->index;
+  int bb;
+
+  if (! flag_gcse_lm)
+    return;
 
   /* load_killed_in_block_p will handle the case of calls clobbering
      everything.  */
+  bb = BLOCK_FOR_INSN (insn)->index;
   modify_mem_list[bb].safe_push (insn);
   bitmap_set_bit (modify_mem_list_set, bb);