Retry powerpc gold stub grouping when groups prove too large
authorAlan Modra <amodra@gmail.com>
Wed, 26 Nov 2014 00:40:29 +0000 (11:10 +1030)
committerAlan Modra <amodra@gmail.com>
Wed, 26 Nov 2014 02:59:29 +0000 (13:29 +1030)
commita3e60ddb0b43a3aed32f2982d472ab305c7e8f67
tree85f47346b1bb39addca84555cdc14064f092258c
parentaa4893954a75660d2aa66245cb9d020049cb9546
Retry powerpc gold stub grouping when groups prove too large

An unusually large number of stubs can result in the default section
group size being too large;  sections plus stubs exceed the range of a
branch.  Restarting the relaxation pass with a smaller group size can
sometimes help.

* powerpc.cc (struct Stub_table_owner): New.
(Powerpc_relobj): Rename stub_table_ to stub_table_index_, an
unsigned int vector.  Update all references.
(powerpc_relobj::set_stub_table): Take an unsigned int param
rather than a Stub_table.  Update callers.
(Powerpc_relobj::clear_stub_table): New function.
(Target_powerpc): Add relax_failed_, relax_fail_count_ and
stub_group_size_ vars.
(Target_powerpc::new_stub_table): Delete.
(max_branch_delta): New function, extracted from..
(Target_powerpc::Relocate::relocate): ..here..
(Target_powerpc::Branch_info::make_stub): ..and here.  Return
status on whether stub created successfully.
(Stub_control::Stub_control): Add "no_size_errors" param.  Move
default sizing to..
(Target_powerpc::do_relax): ..here.  Init stub_group_size_ and
reduce on relax failure.
(Target_powerpc::group_sections): Add "no_size_errors" param.
Use stub_group_size_.  Set up group info in a temp vector,
before building Stub_table vector.  Account for input sections
possibly already converted to relaxed sections.
(Stub_table::init): Delete.  Merge into..
(Stub_table::Stub_table): ..here.
(Stub_table::can_reach_stub): New function.
(Stub_table::add_plt_call_entry): Add "from" parameter and
return true iff stub could be reached.
(Stub_table::add_long_branch_entry): Similarly.  Add "r_type"
param too.
(Stub_table::clear_stubs): Add "all" param.
gold/ChangeLog
gold/powerpc.cc