Revert use of memory_args_by_pointer in i386 gdbarch_tdep.

This is no longer useful, as it was introduced to reuse the funcall
handling code in amd64-tdep.c in the context of x64-windows. But
we have since then changed the implementations to be completely
independent of each other.

This reverts the non-windows-specific part of the change called:
    amd64-windows: memory args passed by pointer during function calls.
(the x64-windows portion has already been reverted)

gdb/ChangeLog:

        Revert:
        * i386-tdep.h (gdbarch_tdep): Add field memory_args_by_pointer.
        * amd64-tdep.c (amd64_push_arguments): Add handling of architectures
        where tdep->memory_args_by_pointer is non-zero.

1 files changed, 0 insertions, 9 deletions

diff --git a/gdb/i386-tdep.h b/gdb/i386-tdep.h
index 8113dcc..0c408fa 100644
--- a/gdb/i386-tdep.h
+++ b/gdb/i386-tdep.h
@@ -85,15 +85,6 @@ struct gdbarch_tdep
      the result in CLASS.  Used on amd64 only.  */
   void (*classify) (struct type *type, enum amd64_reg_class class[2]);
 
-  /* Non-zero if the first few MEMORY arguments should be passed by
-     pointer.
-
-     More precisely, MEMORY arguments are passed through the stack.
-     But certain architectures require that their address be passed
-     by register as well, if there are still some integer registers
-     available for argument passing.  */
-  int memory_args_by_pointer;
-
   /* Floating-point registers.  */
   struct regset *fpregset;
   size_t sizeof_fpregset;