> On the following testcase we have IF_THEN_ELSE in insn notes,
> and when folding it, folded_arg1 is a subreg from earlier CC setter,
> as the other argument has equiv constant, simplify_relational_operation
> is called on it to simplify it and we end up with invalid RTL sharing
> of the subreg in between the CC setter insn and the insn with the REG_EQ*
> note.
>
> Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
> trunk?
>
> 2012-10-22 Jakub Jelinek <ja...@redhat.com>
>
> PR rtl-optimization/55010
> * cse.c (fold_rtx): Call copy_rtx on folded_arg{0,1} before passing
> it to simplify_relational_operation.
OK with:
* cse.c (fold_rtx) <RTX_COMPARE>: Call copy_rtx on ...
and if you also fix the long simplify_relational_operation line.
--
Eric Botcazou
