[Bug middle-end/55740] New: [4.8 Regression] ICE in verify_loop_structure, at cfgloop.c:1582, error: loop 2's header does not belong directly to it

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55740

             Bug #: 55740
           Summary: [4.8 Regression] ICE in verify_loop_structure, at
                    cfgloop.c:1582, error: loop 2's header does not belong
                    directly to it
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rguenth@gcc.gnu.org
            Target: i?86-*-*


Created attachment 29007
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29007
preprocessed source

/usr/lib/gcc/i586-suse-linux/4.8/cc1plus -fpreprocessed tDirectories.ii -quiet
-dumpbase tDirectories.cpp -mtune=generic -march=i586 -auxbase-strip
libtools_a-tDirectories.o -g -O2 -Wno-unused-local-typedefs -Wno-long-long
-version -fomit-frame-pointer -fmessage-length=0 -o tDirectories.s
GNU C++ (SUSE Linux) version 4.8.0 20121219 [trunk revision 194606]
(i586-suse-linux)
        compiled by GNU C version 4.8.0 20121219 [trunk revision 194606], GMP
version 5.0.5, MPFR version 3.1.1, MPC version 1.0
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++ (SUSE Linux) version 4.8.0 20121219 [trunk revision 194606]
(i586-suse-linux)
        compiled by GNU C version 4.8.0 20121219 [trunk revision 194606], GMP
version 5.0.5, MPFR version 3.1.1, MPC version 1.0
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: b6dcf1d0957cadf0ad5b36e7839b8868
tools/tDirectories.cpp: In static member function 'static bool
tPath::IsValidPath(const char*)':
tools/tDirectories.cpp:346:1: error: loop 2's header does not belong directly
to it
 }
 ^
tools/tDirectories.cpp:346:1: internal compiler error: in
verify_loop_structure, at cfgloop.c:1582
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugs.opensuse.org/> for instructions.


This is also how LTO bootstrap fails right now on x86_64.