> Hi,
>
>
> ChangeLog
>
> 2013-12-06 Kai Tietz <kti...@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?
So the code in question does spilling relative to stack pointer before function
call and relative to base pointer after the function call and this leads to
mismatch
when stack alignment is in the way?
The chagne seems OK if that is the case.
Honza
>
> 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));
