[llvm-dev] [GlobalISel][AArch64] Toward flipping the switch for O0: Please give it a try!

[Diana Picus via llvm-dev]

Hi,

Just a heads-up for anyone building things with CMake: if you use the
default build type (Release), it will put CMAKE_CXX_FLAGS_RELEASE
after the CMAKE_CXX_FLAGS, so you'll end up running -O3 instead of
-O0. You might want to check your command lines.

Kristof has also found an issue in the test-suite where it actually
runs -O2 due to some weirdness in the build system, we'll try to
commit a fix for that.

Cheers,
Diana

On 30 March 2017 at 16:13, Evgeny Astigeevich via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> Hi Renato,
>
> If Kristof is busy I can make runs on AArch64 Linux (Cortex-A53 and Cortex-57).
>
> Thanks,
> Evgeny Astigeevich
> Senior Compiler Engineer
> Compilation Tools
> ARM
>
>> -----Original Message-----
>> From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of
>> Renato Golin via llvm-dev
>> Sent: Thursday, March 30, 2017 9:54 AM
>> To: Quentin Colombet
>> Cc: llvm-dev; Justin Bogner; Ahmed Bougacha; Aditya Nandakumar
>> Subject: Re: [llvm-dev] [GlobalISel][AArch64] Toward flipping the switch for
>> O0: Please give it a try!
>>
>> On 30 March 2017 at 00:27, Quentin Colombet <qcolombet at apple.com>
>> wrote:
>> > On iOS we are at 100% pass rate in 00 g for the LLVM test suite,
>> > standard benchmarks and unit tests. In about 5% of all functions
>> > GlobalIsel falls back to SDIsel.
>> > (Kristof Beyls would have the linux numbers.) The self host compiler
>> > correctly builds and runs the LLVM test suite in O0.
>>
>> Having done no tests at all on my side, I think we need to have similar
>> numbers on Linux to be able to flip across the board.
>>
>> I don't want to flip it only for Darwin and not Linux, as that will fragment the
>> effort too much.
>>
>> I'll check with Diana and Kristof to know what's the best way forward, but it
>> should be reasonably quick.
>>
>> cheers,
>> --renato
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