[Bug middle-end/34483] wo_prof_two_strs.c:56: internal compiler error: in find_new_var_of_type, at ipa-struct-reorg.c:605

["olga at il dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #44 from olga at il dot ibm dot com  2008-01-21 20:16 -------
(In reply to comment #43)
> >> They failed with -fprofile-generate (BTW they fail without -fprofile-*).
>                          ^^^^ without! sorry
> > If I understand you correctly, the executable of w_prof_global_var.c, compiled
> > with -O3 -fipa-type-escape -fwhole-program -combine -fdump-ipa-all, fails on
> > your system?
> No, w_prof_global_var.c and friends pass without '-fipa-type-escape', but they
> fail with
> -O3 -fipa-struct-reorg -fwhole-program -combine -fipa-type-escape -m64
> due to a segfault (note that I don't know if '-fipa-struct-reorg
> -fwhole-program -combine' makes sense without '-fipa-type-escape'). AFAICT
> '-fdump-ipa-all' does not change the outcome: pass without '-fipa-type-escape',
> fail otherwise.

The -fipa-type-escape flag activates the analysis pass, that does not optimize
the code itself. The -fipa-struct-reorg relies on this analysis, and does
nothing when it is not activated. Therefore the tests pass without
ipa-type-escape.

Sorry pursuing this issue, but let me completely understand it: when you run
*with* profiling, there are two compilations and two executions. If you compile
first with:

-O3 -fipa-type-escape -fwhole-program -combine -fprofile-generate
w_prof_global_var.c

and run the generated executable, is it fail or not? 

> Could this problem be related to PR34621?
I do not know. It can be checked by reverting the patch mentioned in comment #5
of this PR.


Thank you,
Olga


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34483