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Re: Crossjumping of tablejumps
> > by a loop that goes over all insns, checks each insn for references
> > to the literal pool, and checks for each such reference whether it
> > contains label1; if so, replaces label1 with label2 in the constant, creates
> > a new literal pool entry for the modified constant, and replaces the
> > literal pool reference in the insn accordingly?
>
> Hi,
>
> this patch does the replacement of labels as suggested.
> The replacement of the labels in pool constant is done is replace_label ().
> The patch fixes the testcase and gcc.dg/20030213-1.c.
> I hope it finally is correct.
>
> Bootstrapped/regtested x86-64.
> Bootstrapped s390, regtesting in progress.
> OK for mainline if it passes regtesting?
Regtested, fixes gcc.dg/20030213-1.c and many fortran failures caused by
miscompilation of fortran compiler.
Josef
> 2003-03-14 Josef Zlomek <zlomekj at suse dot cz>
>
> * rtl.h (subrtx_p): Renamed to rtx_referenced_p.
> (rtx_pair): Added new element update_label_nuses, renamed to
> replace_label_data.
> * cfgcleanup.c (outgoing_edges_match, try_crossjump_to_edge): Use
> replace_label_data instead of rtx_pair.
> * loop.c (load_mems): Likewise.
> * rtlanal.c (replace_label): Replace label in pool constants and in
> INSN_LIST (in REG_LABEL note).
> (subrtx_p): Renamed to rtx_referenced_p.
> (subrtx_p_1): Renamed to rtx_referenced_p_1, compare the interior of
> LABEL_REF with CODE_LABEL, traverse constants from pool.