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Hi Ahmed, Did you run these experiments on a platform with a linker that makes use of the AArch64CollectLOH-pass-produced information? I'm guessing that the AArch64CollectLOH-pass information and a linker that makes use of that information could affect the profitability of the GlobalMerge pass? Thanks, Kristof > -----Original Message----- > From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmde...

...PM Ahmed Bougacha <ahmed.bougacha at gmail.com> wrote: > On Thu, Feb 26, 2015 at 2:33 AM, Kristof Beyls <kristof.beyls at arm.com> > wrote: > > > > Hi Ahmed, > > > > Did you run these experiments on a platform with a linker that makes > > use of the AArch64CollectLOH-pass-produced information? > > As Jim says, I'm on iOS, so yes. However, I'm mostly running tests > with the pass disabled. > > > > > I'm guessing that the AArch64CollectLOH-pass information and a linker > > that makes use of that information could affect...

...gmail.com> > wrote: >> >> On Thu, Feb 26, 2015 at 2:33 AM, Kristof Beyls <kristof.beyls at arm.com> >> wrote: >> > >> > Hi Ahmed, >> > >> > Did you run these experiments on a platform with a linker that makes >> > use of the AArch64CollectLOH-pass-produced information? >> >> As Jim says, I'm on iOS, so yes. However, I'm mostly running tests >> with the pass disabled. >> >> > >> > I'm guessing that the AArch64CollectLOH-pass information and a linker >> > that makes use of th...

On Thu, Feb 26, 2015 at 2:33 AM, Kristof Beyls <kristof.beyls at arm.com> wrote: > > Hi Ahmed, > > Did you run these experiments on a platform with a linker that makes > use of the AArch64CollectLOH-pass-produced information? As Jim says, I'm on iOS, so yes. However, I'm mostly running tests with the pass disabled. > > I'm guessing that the AArch64CollectLOH-pass information and a linker > that makes use of that information could affect the profitability of > the Glo...

...> >> On Thu, Feb 26, 2015 at 2:33 AM, Kristof Beyls <kristof.beyls at arm.com> > >> wrote: > >> > > >> > Hi Ahmed, > >> > > >> > Did you run these experiments on a platform with a linker that makes > >> > use of the AArch64CollectLOH-pass-produced information? > >> > >> As Jim says, I'm on iOS, so yes. However, I'm mostly running tests > >> with the pass disabled. > >> > >> > > >> > I'm guessing that the AArch64CollectLOH-pass information and a linker >...

Hi all, I am attempting to implement the "reaching definitions" data-flow algorithm on (X86) MachineBasicBlocks for an analysis pass. To do this, I need to compute gen/kill sets for machine basic blocks. To start with, I am only considering the general-purpose registers, RAX-R15 and their sub-registers. Thus, I need to examine each MachineInstr to determine which register(s) it

Thanks Quentin. I'm trying to examine from the operands of the return instruction, and then to get the last assignment of those. I thought use_iterator/reg_iterator may suit better than just loop through the machine basicblock in the reverse order. Cheng-Chih On Thu, Sep 25, 2014 at 1:51 PM, Quentin Colombet <qcolombet at apple.com> wrote: > Hi Cheng-Chih, > > On Sep 25,

Hi all, I've started looking at the GlobalMerge pass, enabled by default on ARM and AArch64. I think we should reconsider that, at least for AArch64. As is, the pass just merges all globals together, in groups of 4KB (AArch64, 128B on ARM). At the time it was enabled, the general thinking was "it's almost free, it doesn't affect performance much, we might as well use it".