https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80881
--- Comment #103 from LIU Hao <lh_mouse at 126 dot com> ---
New test results on master:
```
UCRT64 ~/Desktop
$ cat test.c
extern __thread int i[8];
int foo (void)
{
return i[2] + i[4];
}
UCRT64 ~/Desktop
$ x86_64-w64-mingw32-gcc --version
x86_64-w64-mingw32-gcc.exe (GCC with MCF thread model, built by LH_Mouse)
15.0.1 20250205 (experimental)
Copyright (C) 2025 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
UCRT64 ~/Desktop
$ x86_64-w64-mingw32-gcc test.c -O2 -c && objdump -dr test.o
test.o: file format pe-x86-64
Disassembly of section .text:
0000000000000000 <foo>:
0: 8b 05 00 00 00 00 mov eax,DWORD PTR [rip+0x0] # 6
<foo+0x6>
2: IMAGE_REL_AMD64_REL32 _tls_index
6: 65 48 8b 14 25 58 00 mov rdx,QWORD PTR gs:0x58
d: 00 00
f: 48 8b 14 c2 mov rdx,QWORD PTR [rdx+rax*8]
13: 8b 82 10 00 00 00 mov eax,DWORD PTR [rdx+0x10]
15: IMAGE_REL_AMD64_SECREL i
19: 03 82 08 00 00 00 add eax,DWORD PTR [rdx+0x8]
1b: IMAGE_REL_AMD64_SECREL i
1f: c3 ret
MINGW32 ~/Desktop
$ i686-w64-mingw32-gcc --version
i686-w64-mingw32-gcc.exe (GCC with MCF thread model, built by LH_Mouse) 15.0.1
20250205 (experimental)
Copyright (C) 2025 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
MINGW32 ~/Desktop
$ i686-w64-mingw32-gcc test.c -O2 -c && objdump -dr test.o
test.o: file format pe-i386
Disassembly of section .text:
00000000 <_foo>:
0: a1 00 00 00 00 mov eax,ds:0x0
1: dir32 __tls_index
5: 64 8b 15 2c 00 00 00 mov edx,DWORD PTR fs:0x2c
c: 8b 14 82 mov edx,DWORD PTR [edx+eax*4]
f: 8b 82 10 00 00 00 mov eax,DWORD PTR [edx+0x10]
11: secrel32 _i
15: 03 82 08 00 00 00 add eax,DWORD PTR [edx+0x8]
17: secrel32 _i
1b: c3 ret
1c: 90 nop
1d: 90 nop
1e: 90 nop
1f: 90 nop
```
