i386.c (ix86_function_ms_hook_prologue): Enable x64 support.

2010-07-06  Kai Tietz  <kai.tietz@onevision.com>

        * config/i386/i386.c (ix86_function_ms_hook_prologue): Enable x64
        support.
        (ix86_expand_prologue): Likewise.
        (ix86_handle_fndecl_attribute): Likewise.
        (ix86_asm_declare_function_name): New function for
        ASM_DECLARE_FUNCTION_NAME.
        * config/i386/i386.h (ASM_DECLARE_FUNCTION_NAME): New macro.
        * config/i386/cygming.h (ASM_DECLARE_FUNCTION_NAME): Removed.
        (SUBTARGET_ASM_DECLARE_FUNCTION_NAME): New macro.
        * config/i386/i386-protos.h (ix86_asm_declare_function_name): New.
        * doc/extend.texi: Adjust documentation about ms_hook_prologue
        attribute.

From-SVN: r161876