http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55142
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Component|target |middle-end
--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> 2012-11-01 22:24:20
UTC ---
(In reply to comment #13)
> Created attachment 28591 [details]
> Tentative fix
>
> This generates (essentially) the same RTL as in non-PIC mode, so the generated
> code should be correct if it is correct in non-PIC mode.
>
> Tested only in LP64 mode though.
The patch compiles testcase, but totally miscompiles glibc.
I think the bug is in unsigned array index computation as
shown in Comment 7. dyn->d_tag is signed type and Pmode
!= ptr_mode here.
