[Bug target/58066] GCC mis-compiles access to TLS variable with -fPIC on x86_64

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 32341
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32341&action=edit
A patch

This patch sets ix86_tls_descriptor_calls_expanded_in_cfun after
reload is complete and checks it for stack boundary in
ix86_frame_pointer_required.