[compiler-rt] r246454 - builtins: implement __emutls_get_address

[Chih-hung Hsieh via llvm-commits]

I see. If clang will handle gcc_word same as gcc in all modes, then we
could replace size_t with gcc_word in this emutls.c module.


On Fri, Sep 4, 2015 at 10:35 AM, H.J. Lu <hjl.tools at gmail.com> wrote:

> On Fri, Sep 4, 2015 at 10:32 AM, Chih-hung Hsieh <chh at google.com> wrote:
> > I am not sure which one is correct yet,
> > but gcc -mx32 and clang -mx32 are not compatible.
> >
> >        sizeof(gcc_word) (size_t)
> >  clang -m64   8          8
> >  gcc   -m64   8          8
> >  clang -m32   4          4
> >  gcc   -m32   4          4
> >  clang -mx32  4          4
> >  gcc   -mx32  8          4
> >
> > So, for -mx32 targets, even the original emutls.c will have difference
> > layout for gcc_word from gcc and clang. Would it be right to use only
> gcc or
> > only clang for gcc -mx32? Then, this compiler-rt's emutls.c should be
> > excluded when gcc -mx32 is used.
>
> See:
>
> https://llvm.org/bugs/show_bug.cgi?id=24706
>
> --
> H.J.
>
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