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List:       linaro-toolchain
Subject:    [ACTIVITY] week ending 5th July 2019
From:       Peter Smith <peter.smith () linaro ! org>
Date:       2019-07-05 17:15:25
Message-ID: CAEt-8LDzh=kGbdLNBSLfnR==V_DdPKYkMGj96pOsFqJcauBcfA () mail ! gmail ! com
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[Code size investigation]
Results (clang 2% larger than gcc) replicated on cortex-m0 and
cortex-m4 on Zephyr.
- Clang optimisation to use BLX rather than BL when same function
called multiple times is a pessimisation on Zephyr, especially on M0.
- GCC register allocation seems to result in fewer spills
TODO: Get an estimate of how much code-size difference is down to
different inlining decisions.
On CMSIS DSP cortex-m4f clang appears to be producing smaller than
GCC, not measured averages yet.

[LLD]
- Quite a few upstream reviews, PRs and investigations surrounding them.
- Likely that LLD will be converting to the new variable naming convention.
- Received a request to add cortex-a8 erratum fix for Google Android team.

[Linaro Connect]
Registered and contacted travel.
Drafted a submission for presentation, will submit next week.

Planned Absences:
On holiday Wednesday, Thursday, Friday next week
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