My MOVW patch from last week left an unused variable that killed -Werror
builds, so I posted a new patch to fix it.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04141.html
Ramana approved that in record time, so I've committed it.
Tom has committed Mark Shinwell's BRANCH_COST patch upstream, so I have
backported it to Linaro GCC 4.6.
Maxim has committed his compound conditionals patch upstream, so I've
backported that to Linaro GCC 4.6 also.
Reviewed what other patches are queued for forward porting to 4.6/7,
hoping that other's might have picked some of them off, and found no
other progress just yet.
Reduced the test case for GCC PR48783. For some reason it is retaining
".global" directives for symbols that have been optimized away, which
leads to link errors in the kernel build.
Tried to find out why the "discourage neon in A8" patch has caused test
failures. I'm still not sure - I've asked Michael Hope to rerun the
tests in case it's just random.
Reposted the EABI half-precision patch with the extra bits Joseph says
it needed in the version scripts.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04251.html
Looked at the linking problem reported by Barry Song on the
linaro-toolchain list.
* Other
Public holidays on Monday and Friday.
* Future
I will be attending UDS in Budapest from 8th - 14th May. I shall
continue to read my email, but will not be attending any calls.
----
Upstream patched requiring review:
* NEON scheduling patch
http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html
* ARM Thumb2 addw/subw support.
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html
* ARM Thumb2 Replicated constants
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03883.html
* ARM EABI half-precision function names (reposted 2011-04-27).
http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04251.html
== Last week ==
* CoreMark ARMv6/v7 regression patch set for combine: exchanged some
comments on upstream list with Jeff Law. Started some testing on
powerpc64, hit some issues with native bootstrap that I
don't think I completely overcome, but at least completed a 32-bit
bootstrap successfully. Unfortunately hit two regressions after running
tests, will work on fixing this week, and update the upstream submission.
* PR48783: unused reference to __aeabi_uldivmod. Investigated and found
this to be a case where during RTL expand, .global directives for the
__aeabi_* runtime symbols are directly inserted after some div optab
didn't have the insns, and a libfunc was to be used. However later
optimizations that removed the divisions left the .global symbols
dangling with no uses. We could probably just avoid adding the
directives completely for the EABI functions.
* PR42017: ARM LR register not used in leaf functions. This is a case
where DF takes EPILOGUE_USES as part of the initial live registers at
end of functionn, and liveness computations never get to kill it, since
there are no function calls to clobber in a leaf function. Submitted a
patch to remove LR from EPILOGUE_USES before reload, awaiting review.
* LP #689887: investigated more; not much progress, but found that the
bootstrap fail happens only under --with-mode=thumb (Thumb-2). Under ARM
mode the native bootstrap succeeds.
== This week ==
* Try to fix the problems with the CoreMark combine patches.
* Investigate more optimizations/bugs.
* Prepare for travel to Budapest on Saturday.
Hello,
- Continued analysing DENbench benchmarks.
- Discussed the SMS patched with Ayal Zaks (SMS maintainer).
- Booked the flights for Budapest summit.
Thanks,
Revital
