[Bug tree-optimization/56294] New: BOOT_CFLAGS='-O2 -g -fno-ipa-sra' leads to bootstrap comparison failure

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56294

             Bug #: 56294
           Summary: BOOT_CFLAGS='-O2 -g -fno-ipa-sra' leads to bootstrap
                    comparison failure
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jamborm@gcc.gnu.org


Bootstrapping pristine trunk with BOOT_CFLAGS='-O2 -g -fno-ipa-sra'
leads to comparison failure because gcc/tree-ssa-loop-ivopts.o differs.

Just switching IPA-SRA on (by a patch) when compiling that file
resolves the problem.

The failure has been introduced with revision 192848:

    2012-10-26  Martin Jambor  <mjambor@suse.cz>

        PR debug/54971
        * tree-sra.c (struct access): New flag grp_to_be_debug_replaced.
        (dump_access): Dump the new flag.
        (analyze_access_subtree): Set the new flag when appropriate.
        (create_access_replacement): Handle debug replacements differently.
        (generate_subtree_copies): Handle the grp_to_be_debug_replaced flag.
        (init_subtree_with_zero): Likewise.
        (sra_modify_expr): Likewise.
        (load_assign_lhs_subreplacements): Likewise.
        (sra_modify_assign): Likewise.

So I'll assign it to myself.