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...rately in GlobalsAA (AnalyzeUsesOfPointer checks if a global is used as operand to a function) On December 4, 2015 11:47:20 PM GMT+05:30, James Molloy <james at jamesmolloy.co.uk> wrote: >It is if one of the operands is or can alias a global ? >On Fri, 4 Dec 2015 at 18:16, Vaivaswatha Nagaraj <vn at compilertree.com> >wrote: > >> writing into operands is not the same as writing to globals right? I >added >> printf in the same category since we were discussing writing to >globals. >> >> On December 4, 2015 11:34:10 PM GMT+05:30, James Molloy <...

1.)How can i determine the number of pages in one stream? 2.)Whether size of page is same with in the whole stream? kindly answer these questions as early as possible. Nagaraj C L Flextronics Software System Desk: 41069445 Mobile:9886695116 *********************** FSS-Unclassified *********************** "DISCLAIMER: This message is proprietary to Flextronics Software Systems (FSS) and is intended solely for the use of the individual to whom it is addressed. It...

...that reproduce with llvm-lto? I'm currently looking at a proprietary benchmark. I'll try to extract out a simple test case and send it. - Vaivaswatha On Fri, Dec 4, 2015 at 12:00 AM, Mehdi Amini <mehdi.amini at apple.com> wrote: > > On Dec 3, 2015, at 8:29 AM, Vaivaswatha Nagaraj <vn at compilertree.com> > wrote: > > Hi Mehdi, > > Thank you for the response. > > I'm actually on an LTO setup and was referring to > PassManagerBuilder::addLTOOptimizationPasses. Here, GlobalsAA is scheduled > to run well ahead of SLPVectorizer. However since...

> On Dec 4, 2015, at 10:33 AM, Hal Finkel via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > ----- Original Message ----- >> From: "Vaivaswatha Nagaraj" <vn at compilertree.com> >> To: "James Molloy" <james at jamesmolloy.co.uk>, "Hal Finkel" <hfinkel at anl.gov> >> Cc: "LLVM Dev" <llvm-dev at lists.llvm.org> >> Sent: Friday, December 4, 2015 12:28:03 PM >> Subject:...

...ss object. When I invoke "virsh console" from within Java, I see the following messages on stderr: info : libvirt version: 0.9.8 error : vshRunConsole:318 : unable to get tty attributes: Inappropriate ioctl for device Does anybody know how I can workaround this? Thanks. -- Regards, Nagaraj

...ase37. In fact, on an LTO setup, more LICMs happen on release37 than on the latest SVN, for many of the benchmarks, just because of this. Thanks, - Vaivaswatha On Thu, Dec 3, 2015 at 9:21 PM, Mehdi Amini <mehdi.amini at apple.com> wrote: > > On Dec 3, 2015, at 4:21 AM, Vaivaswatha Nagaraj via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > Thank you both for the inputs. I've created a patch for the same, please > review: > http://reviews.llvm.org/D15185 > > >You can specifically insert it into the pass pipeline, but in this case, > we should...

...james at jamesmolloy.co.uk> wrote: >Hi, > >I just want to reiterate: printf and friends do *not* fall into this >category as they can write to their operands (unless you parse and >check >the format string for %n). > >James > >On Fri, 4 Dec 2015 at 17:53 Vaivaswatha Nagaraj via llvm-dev < >llvm-dev at lists.llvm.org> wrote: > >> >Most of the time you don't have the entire call graph information. >> Imagine that you are developing a module that is a part of a larger >project. >> I now understand the concern. It looks to me that w...

...t; until LICM. > > You can use -debug-pass=Executions to determine at what point GlobalsAA is > not preserved (which pass clobbers it) - you'd then need to add GlobalsAA > to its preserved pass list. > > Cheers, > > James > > On Wed, 2 Dec 2015 at 09:35 Vaivaswatha Nagaraj via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> Hi, >> >> I've noticed that alias analysis queries arising from GVN do not use the >> results from GlobalsAA. >> The last call to AAResultsWrapperPass::runOnFunction() before GVN does >> not...

...un first, those FunctionPasses that invalidate it do so for good. I do not know if there is some other way to force it though. Thanks, - Vaivaswatha On Thu, Dec 3, 2015 at 4:53 PM, Hal Finkel <hfinkel at anl.gov> wrote: > ----- Original Message ----- > > From: "Vaivaswatha Nagaraj via llvm-dev" <llvm-dev at lists.llvm.org> > > To: "James Molloy" <james at jamesmolloy.co.uk> > > Cc: "LLVM Dev" <llvm-dev at lists.llvm.org> > > Sent: Thursday, December 3, 2015 5:20:34 AM > > Subject: Re: [llvm-dev] GlobalsAA fro...

...making malloc > more powerful than user-defined functions. > > All in all it just smells a bit specialist. I'd welcome it if we could > bombproof the semantics and extend the scope somewhat somehow. > > Cheers, > > James > > On Fri, 4 Dec 2015 at 16:31 Vaivaswatha Nagaraj via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> >there would be two disjoint global states >> In some sense yes, but technically not disjoint. Functions marked with >> this attribute should still be able to access the globals within the >> program und...

...lloc/realloc is correct. > malloc/free hooks can be added to most implementations (for leak checking > and so on), so calling malloc could in fact call any other arbitrary code > that could write to memory. > > Cheers, > > James > > On Wed, 2 Dec 2015 at 14:07 Vaivaswatha Nagaraj via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> Hi, >> >> GlobalsAA, during propagation of mod-ref behavior in the call graph, >> looks at library functions (in GlobalsAAResult::AnalyzeCallGraph: >> F->isDeclaration() check), for attributes, and...

.... OK, there's inaccessible state but is there or is > there not accessible, visible state, is the question that optimizers need > to ask. > > So I'd rephrase it to something like "HasNoAccessibleState" ? > > James > > On Fri, 4 Dec 2015 at 07:58 Vaivaswatha Nagaraj via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> >is this "internal state” supposed to be private to the function? >> It could be private or not. Hence the name "inaccessible", to mean that >> the program under compilation has no access to the...

...LVM Dev <llvm-dev at lists.llvm.org> Subject: Re: [llvm-dev] RFC: New function attribute HasInaccessibleState ----- Original Message ----- > From: "Mehdi Amini" <mehdi.amini at apple.com> > To: "Hal Finkel" <hfinkel at anl.gov> > Cc: "Vaivaswatha Nagaraj" <vn at compilertree.com>, "LLVM Dev" > <llvm-dev at lists.llvm.org> > Sent: Friday, December 4, 2015 12:47:00 PM > Subject: Re: [llvm-dev] RFC: New function attribute > HasInaccessibleState > > > > On Dec 4, 2015, at 10:33 AM, Hal Finkel via l...

...tribute) is to convey that these external functions do things inside that the compiler cannot know about, and hence deal with them conservatively. - Vaivaswatha On Fri, Dec 4, 2015 at 9:51 PM, Mehdi Amini <mehdi.amini at apple.com> wrote: > > On Dec 4, 2015, at 8:09 AM, Vaivaswatha Nagaraj <vn at compilertree.com> > wrote: > > >what is a non-public state that no-one but you can access? (I’d call that > private). > malloc and free could both use global variables that are defined in libc, > but are inaccessible to the program under compilation. > > >...

...ess this problem? Yes, this is the primary concern. Most libc functions (including printf, malloc, free) fall into the same category. - Vaivaswatha On Fri, Dec 4, 2015 at 11:12 PM, Hal Finkel <hfinkel at anl.gov> wrote: > ----- Original Message ----- > > From: "Vaivaswatha Nagaraj via llvm-dev" <llvm-dev at lists.llvm.org> > > To: "Krzysztof Parzyszek" <kparzysz at codeaurora.org> > > Cc: "LLVM Dev" <llvm-dev at lists.llvm.org> > > Sent: Friday, December 4, 2015 11:21:03 AM > > Subject: Re: [llvm-dev] RFC: Ne...

...ldn't remove the call, even if the call takes no arguments or its return value isn't, because it could be modifying some internal state. - Vaivaswatha On Fri, Dec 4, 2015 at 9:10 PM, Mehdi Amini <mehdi.amini at apple.com> wrote: > > On Dec 3, 2015, at 11:58 PM, Vaivaswatha Nagaraj <vn at compilertree.com> > wrote: > > >is this "internal state” supposed to be private to the function? > It could be private or not. Hence the name "inaccessible", to mean that > the program under compilation has no access to the state. So while printf > a...

...LVM Dev <llvm-dev at lists.llvm.org> Subject: Re: [llvm-dev] RFC: New function attribute HasInaccessibleState ----- Original Message ----- > From: "Mehdi Amini" <mehdi.amini at apple.com> > To: "Hal Finkel" <hfinkel at anl.gov> > Cc: "Vaivaswatha Nagaraj" <vn at compilertree.com>, "LLVM Dev" > <llvm-dev at lists.llvm.org> > Sent: Friday, December 4, 2015 12:47:00 PM > Subject: Re: [llvm-dev] RFC: New function attribute > HasInaccessibleState > > > > On Dec 4, 2015, at 10:33 AM, Hal Finkel via l...

...uot;, such transforms may happen. Hence to prevent that, the additional flag denoting that these functions maintain an internal state. - Vaivaswatha On Fri, Dec 4, 2015 at 12:20 PM, Mehdi Amini <mehdi.amini at apple.com> wrote: > Hi, > > On Dec 3, 2015, at 10:33 PM, Vaivaswatha Nagaraj via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > Hi, > > This email is in continuation to the mail thread > http://lists.llvm.org/pipermail/llvm-dev/2015-December/092996.html, to > propose a new function attribute that can convey that a function maintains > stat...

...mple, malloc has the flag set, and this is propagated to whoever calls malloc, and then to whoever calls that function and so on. - Vaivaswatha On Fri, Dec 4, 2015 at 10:24 PM, Krzysztof Parzyszek via llvm-dev < llvm-dev at lists.llvm.org> wrote: > On 12/4/2015 10:48 AM, Vaivaswatha Nagaraj via llvm-dev wrote: > >> This point however reminds me to add, functions that transitively call >> functions with HasInaccessibleState must also have the flag set. >> > > That's in practice impossible to guarantee, both by the compiler and by > the programmer. >...

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