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From: "ktietz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/56807] mingw32: Conflict between stack realignment and stack probe destroys function argument in EAX
Date: Wed, 11 Dec 2013 08:34:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56807

--- Comment #14 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Sorry for that on the 4.7 branch.  plus_constant function takes one argument
less on 4.7 branch.  Following patch fixes the issue for me:

Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c  (Revision 205882)
+++ config/i386/i386.c  (Arbeitskopie)
@@ -10431,15 +10431,15 @@ ix86_expand_prologue (void)

       if (r10_live && eax_live)
         {
-         t = plus_constant (Pmode, stack_pointer_rtx, allocate);
+         t = plus_constant (stack_pointer_rtx, allocate);
          emit_move_insn (r10, gen_frame_mem (Pmode, t));
-         t = plus_constant (Pmode, stack_pointer_rtx,
+         t = plus_constant (stack_pointer_rtx,
                             allocate - UNITS_PER_WORD);
          emit_move_insn (eax, gen_frame_mem (Pmode, t));
        }
       else if (eax_live || r10_live)
        {
-         t = plus_constant (Pmode, stack_pointer_rtx, allocate);
+         t = plus_constant (stack_pointer_rtx, allocate);
          emit_move_insn ((eax_live ? eax : r10), gen_frame_mem (Pmode, t));
        }
     }