[Bug rtl-optimization/90357] [9 regression][MIPS] New FAIL: gcc.c-torture/execute/20080502-1.c -O0 start with r269880

[paul.hua.gm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90357

--- Comment #1 from Paul Hua <paul.hua.gm at gmail dot com> ---
Fix patch:

diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index 1de33b2..89fc073 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -4849,6 +4849,7 @@ mips_split_move (rtx dest, rtx src, enum mips_split_type
split_type, rtx insn_)
      can forward SRC for DEST.  This is most useful if the next insn is a
      simple store.   */
   rtx_insn *insn = (rtx_insn *)insn_;
+  struct mips_address_info addr;
   if (insn)
     {
       rtx_insn *next = next_nonnote_nondebug_insn_bb (insn);
@@ -4856,7 +4857,17 @@ mips_split_move (rtx dest, rtx src, enum mips_split_type
split_type, rtx insn_)
        {
          rtx set = single_set (next);
          if (set && SET_SRC (set) == dest)
-           validate_change (next, &SET_SRC (set), src, false);
+           {
+             if (MEM_P (src))
+               {
+                 rtx tmp = XEXP (src, 0);
+                 mips_classify_address (&addr, tmp, GET_MODE (tmp), true);
+                 if (REGNO (addr.reg) != REGNO (dest))
+                   validate_change (next, &SET_SRC (set), src, false);
+               }
+             else
+               validate_change (next, &SET_SRC (set), src, false);
+           }
        }
     }
 }