[Bug rtl-optimization/69430] New: [6 regression] stage2 miscompiled by CCMP

["schwab at linux-m68k dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69430

            Bug ID: 69430
           Summary: [6 regression] stage2 miscompiled by CCMP
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: build, ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: jiong.wang at arm dot com
  Target Milestone: ---
            Target: aarch64-*-*

make[4]: Entering directory
'/opt/gcc/gcc-20160122/Build/aarch64-suse-linux/libstdc++-v3/libsupc++'
/bin/sh ../libtool --tag CC --tag disable-shared  --mode=compile
/opt/gcc/gcc-20160122/Build/./gcc/xgcc -B/opt/gcc/gcc-20160122/Build/./gcc/
-B/usr/aarch64-suse-linux/bin/ -B/usr/aarch64-suse-linux/lib/ -isystem
/usr/aarch64-suse-linux/include -isystem /usr/aarch64-suse-linux/sys-include   
-DHAVE_CONFIG_H -I.. -I/opt/gcc/gcc-20160122/libstdc++-v3/../libiberty
-I/opt/gcc/gcc-20160122/libstdc++-v3/../include -prefer-pic -D_GLIBCXX_SHARED
-I/opt/gcc/gcc-20160122/Build/aarch64-suse-linux/libstdc++-v3/include/aarch64-suse-linux
-I/opt/gcc/gcc-20160122/Build/aarch64-suse-linux/libstdc++-v3/include
-I/opt/gcc/gcc-20160122/libstdc++-v3/libsupc++    -O2 -g -DIN_GLIBCPP_V3
-Wno-error -c cp-demangle.c
libtool: compile:  /opt/gcc/gcc-20160122/Build/./gcc/xgcc
-B/opt/gcc/gcc-20160122/Build/./gcc/ -B/usr/aarch64-suse-linux/bin/
-B/usr/aarch64-suse-linux/lib/ -isystem /usr/aarch64-suse-linux/include
-isystem /usr/aarch64-suse-linux/sys-include -DHAVE_CONFIG_H -I..
-I/opt/gcc/gcc-20160122/libstdc++-v3/../libiberty
-I/opt/gcc/gcc-20160122/libstdc++-v3/../include -D_GLIBCXX_SHARED
-I/opt/gcc/gcc-20160122/Build/aarch64-suse-linux/libstdc++-v3/include/aarch64-suse-linux
-I/opt/gcc/gcc-20160122/Build/aarch64-suse-linux/libstdc++-v3/include
-I/opt/gcc/gcc-20160122/libstdc++-v3/libsupc++ -O2 -g -DIN_GLIBCPP_V3
-Wno-error -c cp-demangle.c  -fPIC -DPIC -o cp-demangle.o
cp-demangle.c: In function âd_typeâ:
cp-demangle.c:2346:40: internal compiler error: RTL flag check: MEM_VOLATILE_P
used with unexpected rtx code 'mem' in set_mem_attributes_minus_bitpos, at
emit-rtl.c:1833
       di->expansion += ret->u.s_builtin.type->len;
                        ~~~~~~~~~~~~~~~~^~~~~

0x5c3077 ???
        ../sysdeps/aarch64/start.S:81
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.
Makefile:844: recipe for target 'cp-demangle.lo' failed
make[4]: *** [cp-demangle.lo] Error 1
make[4]: Leaving directory
'/opt/gcc/gcc-20160122/Build/aarch64-suse-linux/libstdc++-v3/libsupc++'
Makefile:507: recipe for target 'all-recursive' failed
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory
'/opt/gcc/gcc-20160122/Build/aarch64-suse-linux/libstdc++-v3'
Makefile:414: recipe for target 'all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory
'/opt/gcc/gcc-20160122/Build/aarch64-suse-linux/libstdc++-v3'
Makefile:13324: recipe for target 'all-stage2-target-libstdc++-v3' failed
make[1]: *** [all-stage2-target-libstdc++-v3] Error 2
make[1]: Leaving directory '/opt/gcc/gcc-20160122/Build'
Makefile:22659: recipe for target 'stage2-bubble' failed
make: *** [stage2-bubble] Error 2

07bd240ed93406c063fd6f7a42e18a533f7ae556 is the first bad commit
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232565
138bc75d-0d04-0410-961f-82ee72b054a4