[Bug ipa/64218] New: ICE during compilation with -fno-rtti -O3

[Bug ipa/64218] New: ICE during compilation with -fno-rtti -O3

[antoshkka at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

            Bug ID: 64218
           Summary: ICE during compilation with -fno-rtti -O3
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: antoshkka at gmail dot com

Following error occurred during compilation of one of the Boost's tests:

../libs/variant/test/recursive_variant_test.cpp:315:1: internal compiler error:
Segmentation fault
 }
 ^
0xc9658f crash_signal
?../../gcc/gcc/toplev.c:358
0x8d4280 symtab_node::get_alias_target()
?../../gcc/gcc/cgraph.h:2242
0x8d4280 symtab_node::ultimate_alias_target(availability*)
?../../gcc/gcc/symtab.c:1292
0x12a3b33 cgraph_node::ultimate_alias_target(availability*)
?../../gcc/gcc/cgraph.h:2684
0x12a3b33 want_inline_function_to_all_callers_p
?../../gcc/gcc/ipa-inline.c:840
0x12a3b33 ipa_inline
?../../gcc/gcc/ipa-inline.c:2245
0x12a3b33 execute
?../../gcc/gcc/ipa-inline.c:2558
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.


Code was compiled with the following flags:
"g++"  -ftemplate-depth-128 -fno-rtti -O3 -finline-functions -Wno-inline -Wall
-fPIC -std=c++11 -march=native -DBOOST_ALL_NO_LIB=1 -DBOOST_NO_RTTI
-DBOOST_NO_TYPEID -DNDEBUG  -I".." -c -o
"/home/trippels/results/boost/bin.v2/libs/variant/test/variant_no_rtti_test.test/gcc-5.0.0/release/pch-off/rtti-off/recursive_variant_test.o"
"../libs/variant/test/recursive_variant_test.cpp"

Sources can be seen here:
https://github.com/boostorg/variant/blob/develop/test/recursive_variant_test.cpp#L315


Exactly the same test compile and pass OK if rtti is on.

P.S.: Sorry for no preprocessed and minimized code, I have no access to 5.0.0.
I'm trying to contact the test runner, but no success at this point.

[Bug ipa/64218] ICE during compilation with -fno-rtti -O3

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |trippels at gcc dot gnu.org

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
The test runner is me.
I must have overlooked this ICE in the hundreds of similar ICEs
due to PR1558.

[Bug ipa/64218] ICE during compilation with -fno-rtti -O3

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
I meant PR61558.

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-12-08
   Target Milestone|---                         |5.0
            Summary|ICE during compilation with |[5 Regression] ICE:
                   |-fno-rtti -O3               |Segmentation fault
                   |                            |(symtab_node::get_alias_tar
                   |                            |get()) running Boost
                   |                            |testsuite
     Ever confirmed|0                           |1

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Reducing...

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 34221
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34221&action=edit
Somewhat reduced testcase

Somewhat reduced, still over 1000 lines of code.

trippels@gcc20 boost_root % g++ -w -c -O2 -std=c++11 recursive_variant_test.ii
recursive_variant_test.ii:1450:1: internal compiler error: Segmentation fault
 }
 ^
0xcc9fef crash_signal
        ../../gcc/gcc/toplev.c:358
0x900e72 symtab_node::get_alias_target()
        ../../gcc/gcc/cgraph.h:2247
0x900e72 symtab_node::ultimate_alias_target(availability*)
        ../../gcc/gcc/symtab.c:1293
0x1314a0a cgraph_node::ultimate_alias_target(availability*)
        ../../gcc/gcc/cgraph.h:2690
0x1314a0a want_inline_function_to_all_callers_p
        ../../gcc/gcc/ipa-inline.c:840
0x1314a0a ipa_inline
        ../../gcc/gcc/ipa-inline.c:2245
0x1314a0a execute
        ../../gcc/gcc/ipa-inline.c:2558
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |marxin at gcc dot gnu.org

--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r218048.

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu.org
           Assignee|marxin at gcc dot gnu.org          |unassigned at gcc dot gnu.org

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Hello.

You are Markus right, that it started with r218048, but it's actually caused
by: r218024. Reason for that is that sreal, utilized for inlining purpose, was
broken between r218008-r218048.

Problematic commit:

2014-11-22  Jan Hubicka  <hubicka@ucw.cz>

    PR ipa/63671
    * ipa-inline-transform.c (can_remove_node_now_p_1): Handle alises
    and -fno-devirtualize more carefully.
    (can_remove_node_now_p): Update.

Thanks,
Martin
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Subject: [Bug tree-optimization/64193] [4.8/4.9/5 Regression] Decreased performance after r173250
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd193

--- Comment #5 from Daniel Cederman <cederman at gaisler dot com> ---
> Probably the regression was mitigated by the partial fix for PR63677:

Yes, that seems to be the case for my attached example. Do you think that the
regression is mitigated in general, or is your attached fix also needed?

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[antoshkka at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

--- Comment #8 from Antony Polukhin <antoshkka at gmail dot com> ---
A few more observations:
* Same Boost test compiles and works well on -mcpu=power8 with -fno-rtti
* Test fails to compile on -mcpu=power8 *WITH RTTI on*:

0x109ccb0b crash_signal
?../../gcc/gcc/toplev.c:358
0x10513e10 symtab_node::get_alias_target()
?../../gcc/gcc/cgraph.h:2250
0x10513e10 symtab_node::ultimate_alias_target(availability*)
?../../gcc/gcc/symtab.c:1302
0x1101f367 cgraph_node::ultimate_alias_target(availability*)
?../../gcc/gcc/cgraph.h:2693
0x1101f367 want_inline_function_to_all_callers_p
?../../gcc/gcc/ipa-inline.c:840
0x1101f367 ipa_inline
?../../gcc/gcc/ipa-inline.c:2249
0x1101f367 execute
?../../gcc/gcc/ipa-inline.c:2562


Here's a whole comand line (just in case):
"g++"  -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC
-std=c++11 -mcpu=power8 -DBOOST_ALL_NO_LIB=1 -DNDEBUG  -I".." -c -o
"/home/trippels/results/boost/bin.v2/libs/variant/test/recursive_variant_test.test/gcc-5.0.0/release/pch-off/recursive_variant_test.o"
"../libs/variant/test/recursive_variant_test.cpp"

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[larsbj at gullik dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

Lars Gullik Bjønnes <larsbj at gullik dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |larsbj at gullik dot net

--- Comment #9 from Lars Gullik Bjønnes <larsbj at gullik dot net> ---
I see the same segfault also outside of the boost testsuite,
have not been able to produce a test case that is uploadable.
(without significant reduction I am not allowed to post the code.)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd607

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-01-14
     Ever confirmed|0                           |1

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

--- Comment #10 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Wonder if this one is fixed, too...

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

--- Comment #11 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #10)
> Wonder if this one is fixed, too...

No. It still crashes.

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

--- Comment #12 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Would be possible to upload updated testcase? The reduced one seems to work for
me on both x86-64 and ppc64.

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

--- Comment #13 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 34479
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34479&action=edit
unreduced testcase

Unreduced testcase is attached. Crashes both on ppc64 and x86_64.

 % g++ -w -c -O3 -std=c++11 recursive_variant_test.ii

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

--- Comment #14 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Good, now it reproduces.  The problem is that inliner removes the alias target
and it leaves the alias itself to be removed by remove_unreachable_nodes.  It
however manages to crash ealrier looking if the alias shall be inlined as
called once in somewhat convoluted test whether symbol is an alias.

Index: ipa-inline.c
===================================================================
--- ipa-inline.c        (revision 219826)
+++ ipa-inline.c        (working copy)
@@ -866,7 +866,8 @@ want_inline_function_to_all_callers_p (s
 {
   bool has_hot_call = false;

-  if (node->ultimate_alias_target () != node)
+  /* Aliases gets inlined along with the function they alias.  */
+  if (node->alias)
     return false;
   /* Already inlined?  */
   if (node->global.inlined_to)

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #16 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Fixed.

[Bug ipa/64218] [5 Regression] ICE: Segmentation fault (symtab_node::get_alias_target()) running Boost testsuite

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64218

--- Comment #15 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Mon Jan 19 20:46:15 2015
New Revision: 219859

URL: https://gcc.gnu.org/viewcvs?rev=219859&root=gcc&view=rev
Log:

    PR ipa/64218
    * ipa-inline.c (want_inline_function_to_all_callers_p): Fix check
    whether function is an alias.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ipa-inline.c