[Bug sanitizer/81111] Cannot build libstdc++ with -fsanitize=undefined

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81111

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-06-16
     Ever confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:

template<typename _Value>
  struct __numeric_traits_integer
  {

    static const _Value __min = (((_Value)(-1) < 0) ? (_Value)1 <<
(sizeof(_Value) * 8 - ((_Value)(-1) < 0)) : (_Value)0);
  };

template<typename _Value>
  const _Value __numeric_traits_integer<_Value>::__min;

void f()
{
  __numeric_traits_integer<unsigned long long>::__min;
}


$ /home/jwakely/src/gcc/build/gcc/cc1plus -fsanitize=undefined -m32 -quiet
ice.cc 
ice.cc: In instantiation of ‘const long long unsigned int
__numeric_traits_integer<long long unsigned int>::__min’:
ice.cc:13:49:   required from here
ice.cc:5:65: internal compiler error: Segmentation fault
     static const _Value __min = (((_Value)(-1) < 0) ? (_Value)1 <<
(sizeof(_Value) * 8 - ((_Value)(-1) < 0)) : (_Value)0);
                                                      
~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0xde006f crash_signal
        /home/jwakely/src/gcc/gcc/gcc/toplev.c:338
0xb2ba10 tree_check(tree_node*, char const*, int, char const*, tree_code)
        /home/jwakely/src/gcc/gcc/gcc/tree.h:3082
0xb2ba10 gimple_body(tree_node*)
        /home/jwakely/src/gcc/gcc/gcc/gimple-expr.c:317
0xb538a4 gimple_add_tmp_var(tree_node*)
        /home/jwakely/src/gcc/gcc/gcc/gimplify.c:753
0xb2c1ea create_tmp_var(tree_node*, char const*)
        /home/jwakely/src/gcc/gcc/gcc/gimple-expr.c:477
0xe02151 ubsan_encode_value(tree_node*, bool)
        /home/jwakely/src/gcc/gcc/gcc/ubsan.c:146
0x936fd4 ubsan_instrument_shift(unsigned int, tree_code, tree_node*,
tree_node*)
        /home/jwakely/src/gcc/gcc/gcc/c-family/c-ubsan.c:215
0x8a960d cp_build_binary_op(unsigned int, tree_code, tree_node*, tree_node*,
int)
        /home/jwakely/src/gcc/gcc/gcc/cp/typeck.c:5282
0x671fca build_new_op_1
        /home/jwakely/src/gcc/gcc/gcc/cp/call.c:6019
0x6730de build_new_op(unsigned int, tree_code, int, tree_node*, tree_node*,
tree_node*, tree_node**, int)
        /home/jwakely/src/gcc/gcc/gcc/cp/call.c:6064
0x89a252 build_x_binary_op(unsigned int, tree_code, tree_node*, tree_code,
tree_node*, tree_code, tree_node**, int)
        /home/jwakely/src/gcc/gcc/gcc/cp/typeck.c:3959
0x810657 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:16921
0x812f16 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:17469
0x806f4e tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:16534
0x801db0 regenerate_decl_from_template
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:22419
0x801db0 instantiate_decl(tree_node*, bool, bool)
        /home/jwakely/src/gcc/gcc/gcc/cp/pt.c:22854
0x72831f maybe_instantiate_decl
        /home/jwakely/src/gcc/gcc/gcc/cp/decl2.c:4995
0x72af55 mark_used(tree_node*, int)
        /home/jwakely/src/gcc/gcc/gcc/cp/decl2.c:5094
0x86759a finish_id_expression(tree_node*, tree_node*, tree_node*, cp_id_kind*,
bool, bool, bool*, bool, bool, bool, bool, char const**, unsigned int)
        /home/jwakely/src/gcc/gcc/gcc/cp/semantics.c:3705
0x7a3603 cp_parser_primary_expression
        /home/jwakely/src/gcc/gcc/gcc/cp/parser.c:5325
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