[Bug other/80678] New: g++.dg/cpp1y/constexpr-79681-2.C fails with ICE starting with r247678

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80678

            Bug ID: 80678
           Summary: g++.dg/cpp1y/constexpr-79681-2.C fails with ICE
                    starting with r247678
           Product: gcc
           Version: 6.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

The backported test g++.dg/cpp1y/constexpr-79681-2.C fails with an ICE on
powerpcle:

spawn /home/seurer/gcc/build/gcc-6/gcc/testsuite/g++/../../xg++
-B/home/seurer/gcc/build/gcc-6/gcc/testsuite/g++/../../
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/home/seurer/gcc/build/gcc-6/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/seurer/gcc/build/gcc-6/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/gcc-6/libstdc++-v3/libsupc++
-I/home/seurer/gcc/gcc-6/libstdc++-v3/include/backward
-I/home/seurer/gcc/gcc-6/libstdc++-v3/testsuite/util -fmessage-length=0
-std=gnu++14 -O2 -S -o constexpr-79681-2.s
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:20:  
in constexpr expansion of 'foo()'
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:26:
internal compiler error: in cxx_eval_bit_field_ref, at cp/constexpr.c:2363
0x1036f2db cxx_eval_bit_field_ref
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:2363
0x1036f2db cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4003
0x1037091b cxx_eval_binary_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x103703db cxx_eval_store_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3296
0x1036db3b cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3780
0x1036dddf cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3792
0x1037196b cxx_eval_statement_list
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3504
0x1036db0b cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4129
0x1036dc13 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4184
0x1036c85f cxx_eval_call_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1546
0x1036e5b3 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3702
0x1036929b cxx_eval_outermost_constant_expr
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4292
0x10371d03 maybe_constant_value_1
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4486
0x10371d03 maybe_constant_value(tree_node*, tree_node*)
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4510
0x10356fcb cp_fold
        /home/seurer/gcc/gcc-6/gcc/cp/cp-gimplify.c:2261
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.
compiler exited with status 1
output is:
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:20:  
in constexpr expansion of 'foo()'
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:26:
internal compiler error: in cxx_eval_bit_field_ref, at cp/constexpr.c:2363
0x1036f2db cxx_eval_bit_field_ref
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:2363
0x1036f2db cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4003
0x1037091b cxx_eval_binary_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x103703db cxx_eval_store_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3296
0x1036db3b cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3780
0x1036dddf cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3792
0x1037196b cxx_eval_statement_list
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3504
0x1036db0b cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4129
0x1036dc13 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4184
0x1036c85f cxx_eval_call_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1546
0x1036e5b3 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3702
0x1036929b cxx_eval_outermost_constant_expr
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4292
0x10371d03 maybe_constant_value_1
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4486
0x10371d03 maybe_constant_value(tree_node*, tree_node*)
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4510
0x10356fcb cp_fold
        /home/seurer/gcc/gcc-6/gcc/cp/cp-gimplify.c:2261
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.

FAIL: g++.dg/cpp1y/constexpr-79681-2.C  -std=gnu++14 (internal compiler error)
FAIL: g++.dg/cpp1y/constexpr-79681-2.C  -std=gnu++14 (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/cpp1y/constexpr-79681-2.C:38:26:
internal compiler error: in cxx_eval_bit_field_ref, at cp/constexpr.c:2363
0x1036f2db cxx_eval_bit_field_ref
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:2363
0x1036f2db cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4003
0x1037091b cxx_eval_binary_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x1037091b cxx_eval_binary_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1835
0x1036e553 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3960
0x103703db cxx_eval_store_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3296
0x1036db3b cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3780
0x1036dddf cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3792
0x1037196b cxx_eval_statement_list
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3504
0x1036db0b cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4129
0x1036dc13 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4184
0x1036c85f cxx_eval_call_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:1546
0x1036e5b3 cxx_eval_constant_expression
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:3702
0x1036929b cxx_eval_outermost_constant_expr
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4292
0x10371d03 maybe_constant_value_1
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4486
0x10371d03 maybe_constant_value(tree_node*, tree_node*)
        /home/seurer/gcc/gcc-6/gcc/cp/constexpr.c:4510
0x10356fcb cp_fold
        /home/seurer/gcc/gcc-6/gcc/cp/cp-gimplify.c:2261

testcase /home/seurer/gcc/gcc-6/gcc/testsuite/g++.dg/dg.exp completed in 2
seconds

                === g++ Summary ===

# of unexpected failures        2
# of unsupported tests          2