[patch i386]: Fix PR 56807

[Kai Tietz]

Hi,


ChangeLog

2013-12-06  Kai Tietz  <ktietz@redhat.com>

    PR target/56807
    * config/i386/i386.c (ix86_expand_prologue):

Tested for i686-w64-mingw32, x86_64-unknown-linux-gnu.  Ok for apply?

Regards,
Kai

Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c    (Revision 205719)
+++ config/i386/i386.c    (Arbeitskopie)
@@ -10934,18 +10937,21 @@ ix86_expand_prologue (void)
     }
       m->fs.sp_offset += allocate;

+      /* Use stack_pointer_rtx for relative addressing so that code
+     works for realigned stack, too.  */
       if (r10_live && eax_live)
         {
-      t = choose_baseaddr (m->fs.sp_offset - allocate);
+      t = plus_constant (Pmode, stack_pointer_rtx, allocate);
       emit_move_insn (gen_rtx_REG (word_mode, R10_REG),
               gen_frame_mem (word_mode, t));
-      t = choose_baseaddr (m->fs.sp_offset - allocate - UNITS_PER_WORD);
+      t = plus_constant (Pmode, stack_pointer_rtx,
+                 allocate - UNITS_PER_WORD);
       emit_move_insn (gen_rtx_REG (word_mode, AX_REG),
               gen_frame_mem (word_mode, t));
     }
       else if (eax_live || r10_live)
     {
-      t = choose_baseaddr (m->fs.sp_offset - allocate);
+      t = plus_constant (Pmode, stack_pointer_rtx, allocate);
       emit_move_insn (gen_rtx_REG (word_mode,
                        (eax_live ? AX_REG : R10_REG)),
               gen_frame_mem (word_mode, t));