http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49860
--- Comment #7 from Uros Bizjak <ubizjak at gmail dot com> 2011-07-27 16:04:47
UTC ---
(In reply to comment #6)
> > > This testcase is about valid address for x86_64_immediate_operand
> > > and x86_64_zext_immediate_operand. If it is valid for TARGET_32BIT,
> > > it should be valid for TARGET_X32.
> >
> > (define_predicate "x86_64_immediate_operand"
> > (match_code "const_int,symbol_ref,label_ref,const")
> > {
> > if (!TARGET_64BIT)
> > return immediate_operand (op, mode);
> > ...
>
> X32 != LP64.
i686 = TARGET_32BIT
x32 = TARGET_64BIT
x86_64 = TARGET_64BIT
> > This is artificial limitation.
>
> Those generated codes aren't very efficient for x32. There is
> a problem somewhere.
It is *movdi_internal_rex64. But you can't change it. It must handle all
immediate_operands.
