[Bug target/128437] [14/15/16/17 Regression] ICE: output_operand: '%&' used without any local dynamic TLS references on x86_64 with -O2 -fPIC -fvisibility=hidden

[george.cox at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128437

--- Comment #20 from George Cox <george.cox at gmail dot com> ---
r17-6061-g45d15ffd7de fixes the full source as well -- I built my whole project
with 17.0.0 20261109 and without the -mtls-dialect=gnu2 workaround, and no file
hit the TLS ICE, at -O2 or -O3.

I could not run the tests because five other files hit an unrelated front-end
ICE on master (unexpected expression of kind implicit_conv_expr in
cxx_eval_constant_expression), which also happens on 20261106 and not on
16.2.0. I will make a separate PR for that.