On Wed, Mar 12, 2014 at 2:36 PM, Wei Mi <w...@google.com> wrote: > Hi H.J., > > Could you show me why you postpone the setting > ix86_tls_descriptor_calls_expanded_in_cfun until reload_complete and > use ix86_tls_descriptor_calls_expanded_in_cfun instead of > ix86_current_function_calls_tls_descriptor? Isn't > ix86_current_function_calls_tls_descriptor useful to consider the case > that tls call is optimized away? >
When a tls call is optimized away, it won't survive reload. If it does survive reload, it isn't optimized away. Also checking df_regs_ever_live_p (SP_REG) isn't reliable when called from ix86_compute_frame_layout. -- H.J.
