[Bug libstdc++/88859] [8/9 Regression] FAIL: experimental/string_view/operators/wchar_t/2.cc execution test
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88859 H.J. Lu changed: What|Removed |Added Status|NEW |RESOLVED See Also||https://sourceware.org/bugz ||illa/show_bug.cgi?id=24097 Resolution|--- |MOVED --- Comment #7 from H.J. Lu --- This is a glibc bug: https://sourceware.org/bugzilla/show_bug.cgi?id=24097
[Bug libstdc++/88859] [8/9 Regression] FAIL: experimental/string_view/operators/wchar_t/2.cc execution test
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88859
--- Comment #6 from H.J. Lu ---
__y is passed in %rsi:
(gdb) p &__y
Address requested for identifier "__y" which is in register $rsi
(gdb) p __y
$24 = {static npos = , _M_len = 10,
_M_str = 0x402008 L"costa rica"}
(gdb) p/x $rsi
$25 = 0x402008000a
(gdb)
0x00401690 <+32>:mov%rdi,%rdx
^^^ This should be "mov %edi, %edx".
0x00401693 <+35>:shr$0x20,%rsi
0x00401697 <+39>:shr$0x20,%rdi
0x0040169b <+43>:callq 0x401050
[Bug libstdc++/88859] [8/9 Regression] FAIL: experimental/string_view/operators/wchar_t/2.cc execution test
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88859 --- Comment #5 from H.J. Lu --- Breakpoint 1, std::char_traits::compare (__n=, __s2=, __s1=) at /export/build/gnu/tools-build/gcc-x32-debug-8/build-x86_64-linux/x86_64-pc-linux-gnu/x32/libstdc++-v3/include/bits/char_traits.h:420 420 return wmemcmp(__s1, __s2, __n); (gdb) c Continuing. Breakpoint 2, __wmemcmp_avx2_movbe () at ../sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S:61 61 shl $2, %rdx $7 = 18049617241309194 (gdb) p/x $rdx $8 = 0x402008000a (gdb) 18049617241309194 is a bogus length.
[Bug libstdc++/88859] [8/9 Regression] FAIL: experimental/string_view/operators/wchar_t/2.cc execution test
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88859
--- Comment #4 from H.J. Lu ---
[hjl@gnu-skx-1 pr88859]$ cat x.cc
#include
#define VERIFY(fn) if (!(fn)) __builtin_abort();
int
main()
{
std::experimental::wstring_view str_0(L"costa rica");
std::experimental::wstring_view str_1(L"costa marbella");
std::experimental::wstring_view str_2(L"cost");
std::experimental::wstring_view str_3(L"costa ricans");
std::experimental::wstring_view str_4;
str_4 = str_0;
VERIFY( !(str_0 == str_1) );
VERIFY( !(str_0 == str_2) );
VERIFY( !(str_0 == str_3) );
VERIFY( !(str_1 == str_0) );
VERIFY( !(str_2 == str_0) );
VERIFY( !(str_3 == str_0) );
VERIFY( str_4 == str_0 );
VERIFY( str_0 == str_4 );
VERIFY( !(str_0 == L"costa marbella") );
VERIFY( !(str_0 == L"cost") );
VERIFY( !(str_0 == L"costa ricans") );
VERIFY( !(L"cost" == str_0) );
VERIFY( !(L"costa ricans" == str_0) );
VERIFY( L"costa rica" == str_0 );
VERIFY( str_0 == L"costa rica" );
VERIFY( L"costa ricans" != str_0 );
VERIFY( !(L"costa rica" != str_0) );
return 0;
}
[hjl@gnu-skx-1 pr88859]$ make
g++ -O2 -mx32 -S x.cc
g++ -O2 -mx32 -o x x.s
./x
make: *** [Makefile:12: all] Segmentation fault
[hjl@gnu-skx-1 pr88859]$
[Bug libstdc++/88859] [8/9 Regression] FAIL: experimental/string_view/operators/wchar_t/2.cc execution test
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88859 H.J. Lu changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2019-01-15 Summary|FAIL: |[8/9 Regression] FAIL: |experimental/string_view/op |experimental/string_view/op |erators/wchar_t/2.cc|erators/wchar_t/2.cc |execution test |execution test Ever confirmed|0 |1 --- Comment #3 from H.J. Lu --- This was triggered by r254832. The bug may be latent before.
