From: Alan Modra <amodra@gmail.com>
To: gcc-patches@gcc.gnu.org
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Subject: [PATCH 0/6] [RS6000] inline plt call support
Date: Wed, 07 Nov 2018 05:33:00 -0000 [thread overview]
Message-ID: <20181107053326.GM29482@bubble.grove.modra.org> (raw)
Hi Segher,
This is the patch series you already saw earlier this year, rebased
to recent gcc, and with a comment or two fixed. The first five
patches tidy and rearrange the function call code in order to support
inline plt calls without a huge increase in rs6000.md. As is, inline
plt calls are supported for powerpc-linux and powerpc64le-linux
ELFv2. I don't support them for powerpc64-linux ELFv1 due to the
extra read barriers needed there, but it wouldn't be too difficult to
support if there was demand.
I've regression tested again on powerpc64le-linux. Earlier testing
went to some lengths with old and new binutils on powerpc-linux,
powerpc64le-linux and powerpc64-linux. I also tested using -fno-plt
in bootstrap and regression tests, which unsurprisingly showed
numerous fails due to wrong counts of symbols (inline plt references a
function symbol multiple times to make a call), wrong "bl" counts
(none with inline call) or similar. I didn't see anything
frightening, and I expect that people generally won't regression test
with -fno-plt, so I haven't modified any tests.
One benefit of the inline plt support is that gcc will now use the new
sequences and relocs to support -mlongcall. This allows lazy dynamic
resolution of the plt entries so it is now possible to dlopen
libraries and have -mlongcall code call functions in those libraries.
That wasn't possible before. See
https://bugzilla.redhat.com/show_bug.cgi?id=1633721
Alan Modra (6):
[RS6000] rs6000_output_call for external call insn assembly output
[RS6000] rs6000_output_indirect_call
[RS6000] Replace TLSmode with P, and correct tls call mems
[RS6000] Remove constraints on call rounded_stack_size_rtx arg
[RS6000] Use standard call patterns for __tls_get_addr calls
[RS6000] inline plt call sequences
gcc/config.in | 6 +
gcc/config/rs6000/darwin.md | 8 +-
gcc/config/rs6000/predicates.md | 25 +
gcc/config/rs6000/rs6000-protos.h | 8 +-
gcc/config/rs6000/rs6000.c | 617 ++++++++++++++---
gcc/config/rs6000/rs6000.h | 4 +
gcc/config/rs6000/rs6000.md | 1023 +++++++++++++----------------
gcc/configure | 36 +
gcc/configure.ac | 6 +
9 files changed, 1065 insertions(+), 668 deletions(-)
--
Alan Modra
Australia Development Lab, IBM
next reply other threads:[~2018-11-07 5:33 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-07 5:33 Alan Modra [this message]
2018-11-07 5:37 ` [PATCH 1/6] [RS6000] rs6000_output_call for external call insn assembly output Alan Modra
2018-11-08 0:09 ` Segher Boessenkool
2018-11-08 13:21 ` Alan Modra
2018-11-07 5:38 ` [PATCH 3/6] [RS6000] Replace TLSmode with P, and correct tls call mems Alan Modra
2018-11-08 1:11 ` Segher Boessenkool
2018-11-08 13:27 ` Alan Modra
2018-11-08 18:09 ` Segher Boessenkool
2018-11-07 5:38 ` [PATCH 2/6] [RS6000] rs6000_output_indirect_call Alan Modra
2018-11-12 19:44 ` Bill Schmidt
2018-11-13 0:14 ` Alan Modra
2018-11-13 11:14 ` Segher Boessenkool
2018-11-13 12:48 ` [PATCH 1/6] [RS6000] rs6000_call_template for external call insn assembly output Alan Modra
2018-11-20 15:59 ` Segher Boessenkool
2018-11-13 12:49 ` [PATCH 2/6] [RS6000] rs6000_indirect_call_template Alan Modra
2018-11-20 16:23 ` Segher Boessenkool
2018-11-13 12:50 ` [PATCH 3/6] [RS6000] Replace TLSmode with P, and correct tls call mems Alan Modra
2018-11-20 17:10 ` Segher Boessenkool
2018-11-13 12:51 ` [PATCH 4/6] [RS6000] Remove constraints on call rounded_stack_size_rtx arg Alan Modra
2018-11-27 15:27 ` Segher Boessenkool
2018-11-13 12:52 ` [PATCH 5/6] [RS6000] Use standard call patterns for __tls_get_addr calls Alan Modra
2018-11-27 16:29 ` Segher Boessenkool
2018-11-28 1:07 ` Alan Modra
2018-11-28 13:33 ` Segher Boessenkool
2018-11-28 23:08 ` Alan Modra
2018-11-29 6:11 ` Alan Modra
2018-11-13 12:53 ` [PATCH 6/6] [RS6000] inline plt call sequences Alan Modra
2018-11-27 17:18 ` Segher Boessenkool
2018-11-28 1:34 ` Alan Modra
2018-11-28 13:39 ` Segher Boessenkool
2018-11-07 5:39 ` [PATCH 5/6] [RS6000] Use standard call patterns for __tls_get_addr calls Alan Modra
2018-11-07 5:39 ` [PATCH 4/6] [RS6000] Remove constraints on call rounded_stack_size_rtx arg Alan Modra
2018-11-08 1:19 ` Segher Boessenkool
2018-11-07 5:40 ` [PATCH 6/6] [RS6000] inline plt call sequences Alan Modra
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