search for: cse

Hello, while invoking opt with all possible optimization pairs I stumbled over a stack dump when doing -early-cse-memssa twice: $ clang -Xclang -disable-O0-optnone -S -o fannkuch7.ll -emit-llvm fannkuch7.c $ opt -S -o fannkuch7.ll -early-cse-memssa -early-cse-memssa fannkuch7.ll Questions: Is it illegal to call -early-cse-memssa twice? Are there any other incompatible optimization orders? Best, HwJ -...

As of llvm 3.8, the early CSE pass seems to remove llvm.assume intrinsics. Is this the expected behavior? I've attached as small-ish example of this happening in my production code. $ opt -early-cse before-early-cse.ll -S > after-early-cse.ll Note the use of the assume intrinsic indicating that the loaded value %c...

...we need this other than the fact that we run instcombine after simplifycfg in a bunch of other places. If you're looking for one to rip out, this would be the first one I would rip out because I'm doubtful of its value. > > > On a separate note: > > > >> + early-cse > > Passes like loop-vectorize should be able to do their own CSE without much engineering effort. > > >> slp-vectorize > >> + early-cse > > SLP should do its own CSE. > > I actually agree with you in principle, but I would rather run the pass now (and av...

...passes rather than this unless compile time is hurt too drastically. It makes it much easier to test, validate, and compose all of the various components of the core optimizer. >> >> Here is the structural diff: >> >> + loop-rotate >> loop-vectorize >> + early-cse >> + correlated-propagation >> + instcombine >> + licm >> + loop-unswitch >> + simplifycfg >> + instcombine >> slp-vectorize >> + early-cse >> > > I think a late loop optimization (vectorization) pipeline makes sense. I think we just ha...

...avid Greene wrote: > >> Neither solution eliminates the need for instcombine to be careful and >> consult masks from time to time. >> >> Perhaps I'm totally missing something. Concrete examples would be helpful. > > Ok, so I took my own advice and thought about CSE and instcombine a bit. > I wrote the code by hand in a sort of pseudo-llvm language, so don't > crucify me for mistakes. :) > > CSE is an optimization that needs to pay attention to masks. You can't > (easily) CSE an expression with different masks. If you are using a valu...

Hi Jiangning, On Apr 14, 2014, at 10:31 PM, Jiangning Liu <liujiangning1 at gmail.com> wrote: > Hi Jim, > > 2014-04-15 4:28 GMT+08:00 Jim Grosbach <grosbach at apple.com>: > This sounds reasonable. Thanks, all. > > > - CSE of ADRP optimization (Jiangning) > > Quentin may have some input here. He’s done quite a lot of optimizations for ADRP sequences. > > -Jim > > ​Thanks for letting me ​know Quentin may have deep thought around this. > > ​ARM64 generates pseudo instructions ARM64::MOVaddr...

...ng the path information at run time and dynamically adding entries for the new path. But i need to know the number of static paths (total paths in a function ) whether they are executed or not. Please help me know that, can LLVM provide me with number of static paths or not. -- Gaurav Kumar MTech CSE IIT Kanpur +918960440344 http://www.cse.iitk.ac.in/users/gourav/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110729/364b3a0e/attachment.html>

On Sep 14, 2011, at 7:37 AM, Richard Osborne wrote: > Is there a view on which of the following approaches is better in > general when two nodes with debug locations are merged because of CSE > (either in the MachineCSE pass or because of the CSEMap in the > SelectionDAG): > > 1) Use the DebugLoc of either of the pair of nodes (chosen arbitrarily). > 2) Throw away the line number information on the merged node since it is > not possible to preserve the information...

...esday 05 August 2008 13:27, David Greene wrote: > Neither solution eliminates the need for instcombine to be careful and > consult masks from time to time. > > Perhaps I'm totally missing something. Concrete examples would be helpful. Ok, so I took my own advice and thought about CSE and instcombine a bit. I wrote the code by hand in a sort of pseudo-llvm language, so don't crucify me for mistakes. :) CSE is an optimization that needs to pay attention to masks. You can't (easily) CSE an expression with different masks. Using a mask-per-operation setup, code might lo...

...rned the usage of randomForest from: http://www.maths.lth.se/help/R/.R/library/randomForest/html/randomForest.html Thanks a lot for any of your comments in advance! Hui Han Department of Computer Science and Engineering, The Pennsylvania State University University Park, PA,16802 email: hhan at cse.psu.edu homepage: http://www.cse.psu.edu/~hhan

I have another question about drawing samples from a data frame. This might sound really tricky. Let me use a data frame I have posted earlier as an example: SubID CSE1 CSE2 CSE3 CSE4 WSE1 WSE2 WSE3 WSE4 1 6 5 6 2 6 2 2 4 2 6 4 7 2 6 6 2 3 3 5 5 5 5 5 5 4 5 4 5 4 3 4...

On Sep 14, 2011, at 10:34 AM, Jakob Stoklund Olesen wrote: > > On Sep 14, 2011, at 7:37 AM, Richard Osborne wrote: > >> Is there a view on which of the following approaches is better in >> general when two nodes with debug locations are merged because of CSE >> (either in the MachineCSE pass or because of the CSEMap in the >> SelectionDAG): >> >> 1) Use the DebugLoc of either of the pair of nodes (chosen arbitrarily). >> 2) Throw away the line number information on the merged node since it is >> not possible to p...

...ng the path information at run time and dynamically adding entries for the new path. But i need to know the number of static paths (total paths in a function ) whether they are executed or not. Please help me know that, can LLVM provide me with number of static paths or not. -- Gaurav Kumar MTech CSE IIT Kanpur +918960440344 http://www.cse.iitk.ac.in/users/gourav/ -- Gaurav Kumar MTech CSE IIT Kanpur +918960440344 http://www.cse.iitk.ac.in/users/gourav/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/2...

...nippet in LLVM Programming manual, I couldn't understand it. Any examples on doing the same? ) I tried to delete an instruction using: i->eraseFromParent(); But it throws the following error/exception: *opt -load /home/mtech2/Documents/llvm/build/Debug+Asserts/lib/CSE.so -CSE <test.ll> /dev/null* *opt: /home/mtech2/Documents/llvm/llvm/include/llvm/Support/Casting.h:81: static bool llvm::isa_impl_cl<To, From*>::doit(const From*) [with To = llvm::Instruction; From = llvm::Instruction]: Assertion `Val && "isa<> used on a null pointer&...

...address these differences to enable replicating the -O3 first and second passes using opt flags? Thanks for considering this, -Chad (Opt -O3 first pass) Pass Arguments: -tti -tbaa -scoped-noalias -assumption-cache-tracker -targetlibinfo -verify -ee-instrument -simplifycfg -domtree -sroa -early-cse -lower-expect Target Transform Information Type-Based Alias Analysis Scoped NoAlias Alias Analysis Assumption Cache Tracker Target Library Information FunctionPass Manager Module Verifier Instrument function entry/exit with calls to e.g. mcount() (pre inlining) Simplify the CFG Do...

...hange the return type of a function in a Pass(in a module Pass). I dont want to change any of the arguments of that function. Assume that, I can handle the returning values properly inside the function. Please guide me how to do this ? -- Regards, Gokul Ramaswamy, Graduate Student, Department of CSE, IIT Bombay http://www.cse.iitb.ac.in/~ramaswamy -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110508/6ae9e14f/attachment.html>

Hi, I compiled the xen-3.2 unstableand have booted successfully into dom0. When I try to start a domU, it gives me an error: [root@xx xx]# xm create -c /etc/xen/fedora.fc6.cse Using config file "/etc/xen/fedora.fc6.cse" Error: Not enough memory is available, and dom0 cannot be shrunk any further xm list gives: Name ID Mem VCPUs State Time(s) Domain-0 0 932 1 r----- 94....

...e void @select_value(i8*, i32, i32, i8* nocapture readonly, i8* nocapture readonly, i8*, i32, i32, i32, i8*, i32, i32) #2 //select value will only write to the first parameter, other parameter is readonly For the above case, the second handle_value function call should be replaced with %call with cse or gvn optimization. Is anything I can do to optimize this case? thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140411/3e2ceac3/attachment.html>

def test_check_for_validity post=County.new(:name=>"myname",:description=>"mydesc") assert post.save end above is the method and when i run unit test it is saying as 1) Failure: test_check_for_validity(CountyTest) [/test/unit/county_test.rb:10]: <false> is not true. what does it say i cannot under stand please help -- Karthik.k Mobile -

Ok I think we have some common ground - CSE should choose the aliased pointer over the non-aliased one because we don't want the no-aliasing information to creep outwards from the inlined callsite. I'll put together a patch in the coming days and add y'all as reviewers so you get visibility. Cheers, -Neil. On Wed, Jan 22, 2020...