GCC Bugzilla Bug 27894

"internal compiler error: Segmentation fault" with -O

g++ -O -w -DHL2MP -DHL2_DLL -DUSES_SAVERESTORE -DNDEBUG -DGAME_DLL -DVECTOR
-DPROTECTED_THINGS_ENABLE -DAOA_SERVER  -march=pentium -mmmx  -fpermissive
-D_LINUX -o gccbug.o -c gccbug.cpp
../dlls/../game_shared/soundenvelope.cpp: In member function 'virtual
CSoundPatch* CSoundControllerImp::SoundCreate(IRecipientFilter&, int, const
char*)':
../dlls/../game_shared/soundenvelope.cpp:1029: internal compiler error:
Segmentation fault

Same thing works fine without the -O.

$ gcc -v
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-libgcj-multifile
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre
--with-cpu=generic --host=i386-redhat-linux
Thread model: posix
gcc version 4.1.1 20060525 (Red Hat 4.1.1-1)

Could you attach the preprocessed source?

Yeah - the website wouldn't let me uploaded it at first cause it was too large.
 So I decided I'd get a script running to strip down the lines of the file to
get a bare-bones repro case.  It should be complete in a couple hours if that's
ok.

(In reply to comment #3)
> Yeah - the website wouldn't let me uploaded it at first cause it was too large.
Can you try to compress it?  Also if it still does not fit, can you just email
it to me?

Created an attachment (id=11611) [edit]
test case

Attaching relatively bare-bones test case.  It could perhaps be whittled down a
bit more, but this was as small as it got by way of a hacked-up perl script. :)

Don't know how I got assigned, anyways this is fixed by the patch for PR 27793.

Subject: Bug 27894

Author: jakub
Date: Tue Jun 13 09:21:30 2006
New Revision: 114607

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114607
Log:
        PR middle-end/27793
        * cp-tree.h (cxx_int_tree_map): New struct.
        (struct language_function): Add extern_decl_map field.
        * name-lookup.c (pushdecl_maybe_friend): Add x -> t mapping
        to cp_function_chain->extern_decl_map hash table instead of
        copying over DECL_UID.
        * cp-gimplify.c (cxx_int_tree_map_eq, cxx_int_tree_map_hash): New
        functions.
        (cp_genericize_r): Remap DECL_EXTERN local decls using
        cp_function_chain->extern_decl_map hash table.
        * decl.c (finish_function): Clear extern_decl_map.

        PR c++/26757
        PR c++/27894
        * g++.dg/tree-ssa/pr26757.C: New test.
        * g++.dg/tree-ssa/pr27894.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr26757.C
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr27894.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cp-gimplify.c
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/name-lookup.c
    trunk/gcc/testsuite/ChangeLog

Subject: Bug 27894

Author: jakub
Date: Sun Aug 13 20:26:38 2006
New Revision: 116115

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116115
Log:
2006-08-13  Andrew MacLeod  <amacleod@redhat.com>

        PR middle-end/27793
        * tree-dfa.c (add_referenced_var): Assert DECL_UID is unique for
        different decls.

2006-08-13  Jakub Jelinek  <jakub@redhat.com>

        PR c++/28677
        PR middle-end/27793
        * cp-tree.h (cxx_int_tree_map): New struct.
        (struct language_function): Add extern_decl_map field.
        * name-lookup.c (pushdecl_maybe_friend): Add x -> t mapping
        to cp_function_chain->extern_decl_map hash table instead of
        copying over DECL_UID.
        * cp-gimplify.c (cxx_int_tree_map_eq, cxx_int_tree_map_hash): New
        functions.
        (cp_genericize_r): Remap DECL_EXTERN local decls using
        cp_function_chain->extern_decl_map hash table.
        * decl.c (finish_function): Clear extern_decl_map.

        Revert:
        2006-06-06  Andrew MacLeod  <amacleod@redhat.com>
        PR middle-end/27793
        * tree-dfa.c (referenced_vars_dup_list): New.  List of duplicate 
        referenced_variables with matching DECL_UID's.
        (find_referenced_vars): Make sure duplicate list is empty to start.
        (add_referenced_var): Add var to duplicate list if required.
        * tree-ssa.c (delete_tree_ssa): Clear var_ann's on duplicates.
        * tree-flow.h (referenced_vars_dup_list): External declaration.

        PR c++/26757
        PR c++/27894
        * g++.dg/tree-ssa/pr26757.C: New test.
        * g++.dg/tree-ssa/pr27894.C: New test.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/g++.dg/tree-ssa/pr26757.C
    branches/gcc-4_1-branch/gcc/testsuite/g++.dg/tree-ssa/pr27894.C
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/cp/ChangeLog
    branches/gcc-4_1-branch/gcc/cp/cp-gimplify.c
    branches/gcc-4_1-branch/gcc/cp/cp-tree.h
    branches/gcc-4_1-branch/gcc/cp/decl.c
    branches/gcc-4_1-branch/gcc/cp/name-lookup.c
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_1-branch/gcc/tree-dfa.c
    branches/gcc-4_1-branch/gcc/tree-flow.h
    branches/gcc-4_1-branch/gcc/tree-ssa.c