[Bug bootstrap/64086] New: [5 Regression] building patched libstdc++ on powerpc64-linux-gnu gets ICE in expand_expr_addr_expr_1, at expr.c:7716

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64086

            Bug ID: 64086
           Summary: [5 Regression] building patched libstdc++ on
                    powerpc64-linux-gnu gets ICE in
                    expand_expr_addr_expr_1, at expr.c:7716
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org

Created attachment 34126
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34126&action=edit
preprocessed source reproducing the ICE

On gcc112, while building the 32-bit libstdc++.so I get a similar ICE to PR
63573

g++5 -std=c++11 -m32 sstream-inst.ii -O2 -c -fno-implicit-templates


In file included from
/home/jwakely/src/gcc/libstdc++-v3/src/c++11/sstream-inst.cc:29:0:
/home/jwakely/build-abi/powerpc64-unknown-linux-gnu/32/libstdc++-v3/include/sstream:
In member function âstd::basic_stringbuf<_CharT, _Traits,
_Alloc>::__string_type std::basic_stringbuf<_CharT, _Traits, _Alloc>::str()
const [with _CharT = wchar_t; _Traits = std::char_traits<wchar_t>; _Alloc =
std::allocator<wchar_t>; std::basic_stringbuf<_CharT, _Traits,
_Alloc>::__string_type = std::basic_string<wchar_t>]â:
/home/jwakely/build-abi/powerpc64-unknown-linux-gnu/32/libstdc++-v3/include/sstream:166:7:
internal compiler error: in expand_expr_addr_expr_1, at expr.c:7716
       str() const
       ^
0x10664f27 expand_expr_addr_expr_1
        /home/jwakely/src/gcc/gcc/expr.c:7716
0x1065681f expand_expr_addr_expr
        /home/jwakely/src/gcc/gcc/expr.c:7830
0x1065681f expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /home/jwakely/src/gcc/gcc/expr.c:10704
0x10506483 expand_normal
        /home/jwakely/src/gcc/gcc/expr.h:305
0x10506483 precompute_register_parameters
        /home/jwakely/src/gcc/gcc/calls.c:869
0x10506483 expand_call(tree_node*, rtx_def*, int)
        /home/jwakely/src/gcc/gcc/calls.c:3119
0x1065645b expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /home/jwakely/src/gcc/gcc/expr.c:10472
0x1051c507 expand_expr
        /home/jwakely/src/gcc/gcc/expr.h:299
0x1051c507 expand_call_stmt
        /home/jwakely/src/gcc/gcc/cfgexpand.c:2347
0x1051c507 expand_gimple_stmt_1
        /home/jwakely/src/gcc/gcc/cfgexpand.c:3293
0x1051c507 expand_gimple_stmt
        /home/jwakely/src/gcc/gcc/cfgexpand.c:3447
0x1052316b expand_gimple_basic_block
        /home/jwakely/src/gcc/gcc/cfgexpand.c:5280
0x10524e27 execute
        /home/jwakely/src/gcc/gcc/cfgexpand.c:5889
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.