Re: optimization/10877: [3.3/3.4 regression] miscompilation with -O3 -fPIC on x86

Janis Johnson <[email protected]>
Newsgroups gmane.comp.gcc.bugs,gmane.comp.gcc.prs
Organization IBM
Message-ID <[email protected]> 
The pc_thunk started going into %eax with this patch:

> 2003-03-12  Eric Botcazou  <[email protected]>
>
>       PR optimization/9888
>       * config/i386/i386.md (jcc_1): Fix range.
>       (jcc_2): Likewise.
>       (jump): LIkewise.
>       (doloop_end_internal): Likewise.
>
> 2003-03-12  Eric Botcazou  <[email protected]>
>
>       PR optimization/9888
>       * config/i386/i386.md (movsi_1): Remove special alternatives
>       for %eax register.
>       (movsi_1_nointernunit): Likewise.
>       (movhi_1): Likewise.
>       * config/i386/i386.c (memory_address_length): Do not use
>       short displacement when there is no base.
>       (ix86_attr_length_address_default): Handle LEA instructions.

This was tested using Wolfgang's smaller testcase and
searching for '_GLOBAL_OFFSET_TABLE_, %eax' in the .s file.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10877
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