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

[Evgeny Astigeevich via llvm-dev]

Hi Diana,

Thank you for information. Yes, I know about the problem with O options.
I've been hit by this whilst I was testing my changes for Oz. 

Thanks,
Evgeny

> -----Original Message-----
> From: Diana Picus [mailto:diana.picus at linaro.org]
> Sent: Thursday, March 30, 2017 4:44 PM
> To: Evgeny Astigeevich
> Cc: Renato Golin; llvm-dev; nd
> Subject: Re: [llvm-dev] [GlobalISel][AArch64] Toward flipping the switch for
> O0: Please give it a try!
> 
> 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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