[Bug target/99392] New: [10/11 regression] ICE for g++.dg/cpp1y/lambda-generic-variadic20.C

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99392

            Bug ID: 99392
           Summary: [10/11 regression] ICE for
                    g++.dg/cpp1y/lambda-generic-variadic20.C
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

Note: this only occurs on powerpc BE 32 bit.

The test case g++.dg/cpp1y/lambda-generic-variadic20.C ICEs when compiled. 
This occurs in both trunk and gcc 10.  In gcc 10 it occurs at the revision
where the test case was added (to where it was backported it appeared).  I had
some issues narrowing it down in trunk but I think it has always failed there,
too.

g:183e9006cc0300257d6f74d573514ef86f78cb4e, r10-7885
make  -k check-gcc RUNTESTFLAGS="--target_board=unix'{-m32,-m64}'
dg.exp=g++.dg/cpp1y/lambda-generic-variadic20.C"
FAIL: g++.dg/cpp1y/lambda-generic-variadic20.C  -std=c++14 (internal compiler
error)
FAIL: g++.dg/cpp1y/lambda-generic-variadic20.C  -std=c++14 (test for excess
errors)
FAIL: g++.dg/cpp1y/lambda-generic-variadic20.C  -std=c++17 (internal compiler
error)
FAIL: g++.dg/cpp1y/lambda-generic-variadic20.C  -std=c++17 (test for excess
errors)
FAIL: g++.dg/cpp1y/lambda-generic-variadic20.C  -std=c++2a (internal compiler
error)
FAIL: g++.dg/cpp1y/lambda-generic-variadic20.C  -std=c++2a (test for excess
errors)

The ICE with gcc 10 (at the revision where the test case was added as shown
above):

Executing on host:
/home/seurer/gcc/git/build/gcc-10-test/gcc/testsuite/g++/../../xg++
-B/home/seurer/gcc/git/build/gcc-10-test/gcc/testsuite/g++/../../
/home/seurer/gcc/git/gcc-10-test/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic20.C
 -m32   -fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never  -fdiagnostics-urls=never  -nostdinc++
-I/home/seurer/gcc/git/build/gcc-10-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include/powerpc64-unknown-linux-gnu
-I/home/seurer/gcc/git/build/gcc-10-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/git/gcc-10-test/libstdc++-v3/libsupc++
-I/home/seurer/gcc/git/gcc-10-test/libstdc++-v3/include/backward
-I/home/seurer/gcc/git/gcc-10-test/libstdc++-v3/testsuite/util
-fmessage-length=0  -std=c++14  -pedantic-errors -Wno-long-long  -S -o
lambda-generic-variadic20.s    (timeout = 300)
spawn -ignore SIGHUP
/home/seurer/gcc/git/build/gcc-10-test/gcc/testsuite/g++/../../xg++
-B/home/seurer/gcc/git/build/gcc-10-test/gcc/testsuite/g++/../../
/home/seurer/gcc/git/gcc-10-test/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic20.C
-m32 -fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -fdiagnostics-urls=never -nostdinc++
-I/home/seurer/gcc/git/build/gcc-10-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include/powerpc64-unknown-linux-gnu
-I/home/seurer/gcc/git/build/gcc-10-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/git/gcc-10-test/libstdc++-v3/libsupc++
-I/home/seurer/gcc/git/gcc-10-test/libstdc++-v3/include/backward
-I/home/seurer/gcc/git/gcc-10-test/libstdc++-v3/testsuite/util
-fmessage-length=0 -std=c++14 -pedantic-errors -Wno-long-long -S -o
lambda-generic-variadic20.s
during RTL pass: expand
/home/seurer/gcc/git/gcc-10-test/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic20.C:
In static member function 'static decltype (((const fooV<{const char*, int,
double, char, float, short int, unsigned int}>::<lambda(auto:1
...)>*)0)->operator()<auto:1
...>(static_cast<auto:1&&>(fooV::._anon_2::_FUN::<unnamed>) ...)) fooV<{const
char*, int, double, char, float, short int, unsigned int}>::<lambda(auto:1
...)>::_FUN(auto:1 ...) [with auto:1 = {fooV<{const char*, int, double, char,
float, short int, unsigned int}>::<lambda(auto:1 ...)>, const char*, int,
double, char, float, short int, unsigned int}]':
/home/seurer/gcc/git/gcc-10-test/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic20.C:5:12:
internal compiler error: in expand_expr_addr_expr_1, at expr.c:8075
0x1091e5eb expand_expr_addr_expr_1
        /home/seurer/gcc/git/gcc-10-test/gcc/expr.c:8075
0x1090e683 expand_expr_addr_expr
        /home/seurer/gcc/git/gcc-10-test/gcc/expr.c:8188
0x1090e683 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /home/seurer/gcc/git/gcc-10-test/gcc/expr.c:11363
0x1072bf13 expand_normal
        /home/seurer/gcc/git/gcc-10-test/gcc/expr.h:288
0x1072bf13 precompute_register_parameters
        /home/seurer/gcc/git/gcc-10-test/gcc/calls.c:982
0x1073a483 expand_call(tree_node*, rtx_def*, int)
        /home/seurer/gcc/git/gcc-10-test/gcc/calls.c:4398
0x1090e5c7 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /home/seurer/gcc/git/gcc-10-test/gcc/expr.c:11135
0x1091ea43 store_expr(tree_node*, rtx_def*, int, bool, bool)
        /home/seurer/gcc/git/gcc-10-test/gcc/expr.c:5752
0x10921f87 expand_assignment(tree_node*, tree_node*, bool)
        /home/seurer/gcc/git/gcc-10-test/gcc/expr.c:5514
0x10754413 expand_call_stmt
        /home/seurer/gcc/git/gcc-10-test/gcc/cfgexpand.c:2701
0x10754413 expand_gimple_stmt_1
        /home/seurer/gcc/git/gcc-10-test/gcc/cfgexpand.c:3682
0x10754413 expand_gimple_stmt
        /home/seurer/gcc/git/gcc-10-test/gcc/cfgexpand.c:3847
0x1075c73f expand_gimple_basic_block
        /home/seurer/gcc/git/gcc-10-test/gcc/cfgexpand.c:5887
0x1075ece7 execute
        /home/seurer/gcc/git/gcc-10-test/gcc/cfgexpand.c:6542


and with trunk (current revision when run):

during RTL pass: expand
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic20.C:5:12:
internal compiler error: in expand_expr_addr_expr_1, at expr.c:8231
0x10a3d603 expand_expr_addr_expr_1
        /home/seurer/gcc/git/gcc-test/gcc/expr.c:8231
0x10a2c83f expand_expr_addr_expr
        /home/seurer/gcc/git/gcc-test/gcc/expr.c:8344
0x10a2c83f expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /home/seurer/gcc/git/gcc-test/gcc/expr.c:11513
0x1085b883 expand_normal
        /home/seurer/gcc/git/gcc-test/gcc/expr.h:288
0x1085b883 precompute_register_parameters
        /home/seurer/gcc/git/gcc-test/gcc/calls.c:988
0x1085b883 expand_call(tree_node*, rtx_def*, int)
        /home/seurer/gcc/git/gcc-test/gcc/calls.c:4450
0x10a2d8af expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /home/seurer/gcc/git/gcc-test/gcc/expr.c:11285
0x10a3df6b store_expr(tree_node*, rtx_def*, int, bool, bool)
        /home/seurer/gcc/git/gcc-test/gcc/expr.c:5886
0x10a4069b expand_assignment(tree_node*, tree_node*, bool)
        /home/seurer/gcc/git/gcc-test/gcc/expr.c:5622
0x108768b3 expand_call_stmt
        /home/seurer/gcc/git/gcc-test/gcc/cfgexpand.c:2838
0x108768b3 expand_gimple_stmt_1
        /home/seurer/gcc/git/gcc-test/gcc/cfgexpand.c:3844
0x1087834f expand_gimple_stmt
        /home/seurer/gcc/git/gcc-test/gcc/cfgexpand.c:4008
0x10880027 expand_gimple_basic_block
        /home/seurer/gcc/git/gcc-test/gcc/cfgexpand.c:6045
0x10882f23 execute
        /home/seurer/gcc/git/gcc-test/gcc/cfgexpand.c:6729