[Bug bootstrap/65337] New: 5.0 bootstrap-lto gnat1 linktime ICE: gcc/ada/exp_aggr.adb:6570:0: internal compiler error: in forward_edge_to_pdom, at tree-ssa-dce.c:1086

["nheghathivhistha at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65337

            Bug ID: 65337
           Summary: 5.0 bootstrap-lto gnat1 linktime ICE:
                    gcc/ada/exp_aggr.adb:6570:0: internal compiler error:
                    in forward_edge_to_pdom, at tree-ssa-dce.c:1086
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nheghathivhistha at gmail dot com

/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/./prev-gcc/xg++
-B/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/./prev-gcc/
-B/usr/x86_64-pc-linux-gnu/bin/ -nostdinc++
-B/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
 -isystem
/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
 -isystem
/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
 -isystem
/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/gcc-4.10.0-20150305/libstdc++-v3/libsupc++
-L/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-m64 -O2 -g -pipe -march=nocona -mtune=nocona -flto=jobserver -frandom-seed=1
-DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -DHAVE_CONFIG_H -static-libstdc++ -static-libgcc  -o
gnat1 ada/adadecode.o ada/adaint.o ada/argv.o ada/cio.o ada/cstreams.o
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ada/sem_ch13.o ada/sem_ch2.o ada/sem_ch3.o ada/sem_ch4.o ada/sem_ch5.o
ada/sem_ch6.o ada/sem_ch7.o ada/sem_ch8.o ada/sem_ch9.o ada/sem_dim.o
ada/sem_disp.o ada/sem_dist.o ada/sem_elab.o ada/sem_elim.o ada/sem_eval.o
ada/sem_intr.o ada/sem_mech.o ada/sem_prag.o ada/sem_res.o ada/sem_scil.o
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ada/treepr.o ada/treeprs.o ada/ttypes.o ada/types.o ada/uintp.o ada/uname.o
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ada/back_end.o ada/gnat1drv.o ada/b_gnat1.o libbackend.a main.o 
libcommon-target.a libcommon.a ../libcpp/libcpp.a
../libdecnumber/libdecnumber.a attribs.o \
  libcommon-target.a libcommon.a ../libcpp/libcpp.a  
../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a   -lisl -lmpc -lmpfr -lgmp -rdynamic -ldl  -lz
-m64 -O2 -g -pipe -march=nocona -mtune=nocona -flto=jobserver -frandom-seed=1

ends up with

/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/gcc-4.10.0-20150305/gcc/ada/exp_aggr.adb:6570:0:
internal compiler error: in forward_edge_to_pdom, at tree-ssa-dce.c:1086

Gcc is vanilla trunk revision 221246.
/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/./prev-gcc/xg++ -v

Using built-in specs.
COLLECT_GCC=/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/build/./prev-gcc/xg++
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-4.10.0_pre20150305/work/gcc-4.10.0-20150305/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.10.0-pre20150305
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.10.0-pre20150305/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.10.0-pre20150305
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.10.0-pre20150305/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.10.0-pre20150305/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.10.0-pre20150305/include/g++-v4
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.10.0-pre20150305/python
--enable-languages=c,c++,fortran,ada --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --enable-nls --without-included-gettext
--enable-checking=release --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo 4.10.0_pre20150305' --enable-libstdcxx-time
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --enable-multilib --with-multilib-list=m32,m64
--disable-altivec --disable-fixed-point --enable-targets=all --disable-libgcj
--enable-libgomp --disable-libmudflap --disable-libssp --enable-lto
--with-cloog --disable-isl-version-check --enable-libsanitizer
--with-build-config=bootstrap-lto
Thread model: posix
gcc version 4.10.0-pre20150305 20150306 (experimental) [trunk revision 221246]
(Gentoo 4.10.0_pre20150305)

Binutils are vanilla version 2.25.51.20150305 from git.