patch to fix PR58335

[Vladimir Makarov]

On 09/12/2013 02:27 PM, Vladimir Makarov wrote:
>   The following patch fixes
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58335
>
>   It required to implement a new approach for elimination updates for
> insn frame_pointer = hard_frame_pointer + offset.  The previous
> implementation used parsing insns generated for offset elimination for
> given insn.  It is hard to parse all possible variants for such
> elimination on different targets.  For example, s390 code is quite
> different from x86/x86-64 code and that was the reason for the PR.
> The new implementation uses temporarily REG_EQUAL notes to avoid
> generated insns
> parsing.  It solves the problem and makes LRA more portable.
>
>   The patch was successfully bootstrapped and tested on x86/x86-64 and s390.
>
> Committed as rev. 202536.

It is actually 202714.
>
> 2013-09-12  Vladimir Makarov  <vmakarov@redhat.com>
>
>         PR middle-end/58335
>         * lra-eliminations.c (remove_reg_equal_offset_note): New.
>         (eliminate_regs_in_insn): Rewrite frame pointer to hard frame
>         pointer elimination with using remove_reg_equal_offset_note.
>
Sorry, I missed to commit the test suite.

The patch is in attachment.

Committed as rev. 202715.

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