search for: loopfus

...r will manage the LoopInfo. It will maintain loop priority queue and expose APIs to add/remove loops that transformations can use. > For > example, some algorithms make internal decisions about which loops to > handle together and also what order to visit them. For example, the > LoopFusion class may need to inspect loop headers to decide which > subsets of loops to fuse and then fuse them as it goes. LoopPassManager will expose two virtual methods. 1) runOnLoop(Loop &L, LoopPassManger &LPM) Loop transformation can override to process this particular loop. 2) r...

...will maintain loop > priority queue and expose APIs to add/remove loops that > transformations can use. > > >> For >> example, some algorithms make internal decisions about which loops to >> handle together and also what order to visit them. For example, the >> LoopFusion class may need to inspect loop headers to decide which >> subsets of loops to fuse and then fuse them as it goes. > > LoopPassManager will expose two virtual methods. > > 1) runOnLoop(Loop &L, LoopPassManger &LPM) > > Loop transformation can override to proc...

...oops in some fixed order. Then the pass could be responsible for making sure that it handles issues like loops that are deleted during the pass. For example, some algorithms make internal decisions about which loops to handle together and also what order to visit them. For example, the LoopFusion class may need to inspect loop headers to decide which subsets of loops to fuse and then fuse them as it goes. I think you could do this just by adding an iterator method somewhere that enumerates sets of loops (i.e,. returns a vector of Loop objects). The bottom-up iterator could just b...

Hi All, I am planning to re-implement PassManager in llvm 2.0. The goal is to address http://nondot.org/sabre/LLVMNotes/Inliner-PassManager.txt and http://nondot.org/sabre/LLVMNotes/LoopOptimizerNotes.txt and other crazy ideas Chris has. Current implementation of PassManager is very complex. Initially I attempted to update it to address above notes but realized that redoing

I did find this note from 2004 that references a LoopFusion pass, but I can't find it in the source code: http://nondot.org/sabre/LLVMNotes/LoopOptimizerNotes.txt A little background - I'm working on a SIMD runtime, where I have a scalar program but need to execute it on multiple independent data elements. One approach is to generate a loop...

...t; fixed order. Then the pass could be responsible for making sure that > it handles issues like loops that are deleted during the pass. For > example, some algorithms make internal decisions about which loops to > handle together and also what order to visit them. For example, the > LoopFusion class may need to inspect loop headers to decide which > subsets of loops to fuse and then fuse them as it goes. I think I see the issue here. The point of the pass manager (in general) is for passes to *give up control* over iteration order in order for obtain something else. For exampl...

Is there a transformation in LLVM that will perform loop fusion? http://en.wikipedia.org/wiki/Loop_fusion I have the following program, in which I would like the 2 loops (iterating the same number of times) to be merged into 1, after which other nice optimizations such as mem2reg will apply: ; ModuleID = 'test' define void @vector([16 x float]* nocapture %arg, [16 x float]* nocapture

...er as identifying all the existing ways for code motion in loop transformations is a big portion of the proposed project. 1. https://github.com/llvm/llvm-project/blob/master/llvm/lib/Transforms/Utils/CodeMoverUtils.cpp 2. https://github.com/llvm/llvm-project/blob/master/llvm/lib/Transforms/Scalar/LoopFuse.cpp 3. https://github.com/llvm/llvm-project/blob/master/llvm/lib/Transforms/Scalar/LICM.cpp 4. https://github.com/llvm/llvm-project/blob/master/llvm/lib/Transforms/Scalar/LICM.cpp#L353 5. https://github.com/llvm/llvm-project/blob/master/llvm/lib/Transforms/Scalar/LICM.cpp#L348 6. https://githu...

...LLVM :: MC/RISCV/relocations.s > LLVM :: MC/RISCV/rv32b-aliases-valid.s > LLVM :: MC/RISCV/rv64b-aliases-valid.s > LLVM :: MC/RISCV/rva-aliases-valid.s > LLVM :: MC/RISCV/rvi-aliases-valid.s > LLVM :: Transforms/InstCombine/double-float-shrink-2.ll > LLVM :: Transforms/LoopFusion/cannot_fuse.ll > LLVM :: tools/llvm-objdump/ELF/dynamic-section-machine-specific.test > LLVM :: tools/llvm-readobj/ELF/RISCV/section-types.test > LLVM :: tools/llvm-readobj/ELF/section-types.test > LLVM :: tools/llvm-readobj/ELF/symbol-binding.test > > All of these are...

...Then the pass could be responsible for making sure that >> it handles issues like loops that are deleted during the pass. For >> example, some algorithms make internal decisions about which loops to >> handle together and also what order to visit them. For example, the >> LoopFusion class may need to inspect loop headers to decide which >> subsets of loops to fuse and then fuse them as it goes. > > I think I see the issue here. The point of the pass manager (in > general) > is for passes to *give up control* over iteration order in order for > obtain...

Hello fellow downstream residents, I see that r358546 accidentally deleted an entire subtree, which was reverted in r358552. This of course caused a big merge conflict in our local repo, and internally we've been debating tactics for dealing with it, hopefully without losing our original history. Has anyone else handled this in a way that they are happy with? We found a StackOverflow

Hi all, Apparently some people had trouble joining today. I also had trouble using the attendee ID provided by webex. I've canceled the meeting series and will be scheduling a new one with an updated link. Please remember to update your calendars with the new invite. My apologies to those who couldn't join today, and to everyone for the churn. Today's Meeting Minutes:

Andrew, There is not any transformation in LLVM that does loop fusion. I do not of anyone who is working on this. If you're interested to work on it then it'd be great! - Devang On Sep 8, 2010, at 9:34 AM, Andrew Clinton wrote: > I did find this note from 2004 that references a LoopFusion pass, but I > can't find it in the source code: > http://nondot.org/sabre/LLVMNotes/LoopOptimizerNotes.txt > > A little background - I'm working on a SIMD runtime, where I have a > scalar program but need to execute it on multiple independent data > elements. One a...

Np, good luck! :) - Stefanos Στις Τρί, 24 Μαρ 2020 στις 8:55 μ.μ., ο/η RITHIK SHARMA < rithiksh02 at gmail.com> έγραψε: > Many thanks, Stefanos! I really appreciate your help :) I heard from > Whitney. > > Best, > Rithik > > On Tue, 24 Mar 2020 at 23:08, Stefanos Baziotis < > stefanos.baziotis at gmail.com> wrote: > >> Hi Rithik, >> >> I

...ned for > LegacyPassManager into the NewPassManager and vice versa? > > Most transformations have both for LegacyPassManager and NewPassManager, > and have the actual implementation of the transformations in a separate > class, or a static function that can be call by both. > e.g. LoopFuseLegacy is for LegacyPassManager , *LoopFusePass* > <https://llvm.org/doxygen/classllvm_1_1LoopFusePass.html#a971f40ada3f1410759faede02bfbace7> is > for NewPassManager, and both create LoopFuser and do the transformation > there. > > Looking forward to your first patch! > &gt...

Hi, Thanks for your help! I've checked the sources that you mentioned. Currently, I think that I would need to implement a FunctionToLoopNestPassAdaptor which is essentially the same as the FunctionToLoopPassAdaptor but operates only on LI.getTopLevelLoops(). We might also need a LNPMUpdater (LoopNestPassManagerUpdater) which disallows adding inner-loops back into the pipeline, and

...t analyses have to be improved >>>> (e.g. past improvements to LAA to support the LoopVersioning >>>> utility, future improvements for full LoopSROA beyond just >>>> store->load forwarding [1] or the improvements to LAA for the >>>> LoopFusion proposal[2]) >>>> >>>> - As more complex loops would have to be analyzed we either >>>> improve LAA or make DependenceAnalysis a drop-in replacement >>>> for the memory analysis part in LAA >>> >>> Or we could use...

...from two > directions: > > - As new transformations are built analyses have to be improved (e.g. past > improvements to LAA to support the LoopVersioning utility, future > improvements for full LoopSROA beyond just store->load forwarding [1] or > the improvements to LAA for the LoopFusion proposal[2]) > > - As more complex loops would have to be analyzed we either improve LAA or > make DependenceAnalysis a drop-in replacement for the memory analysis part > in LAA > > > Or we could use Polly's dependence analysis, which I believe to be more > powerful,...

...> two directions: > > - As new transformations are built analyses have to be improved (e.g. > past improvements to LAA to support the LoopVersioning utility, future > improvements for full LoopSROA beyond just store->load forwarding [1] > or the improvements to LAA for the LoopFusion proposal[2]) > > - As more complex loops would have to be analyzed we either improve > LAA or make DependenceAnalysis a drop-in replacement for the memory > analysis part in LAA Or we could use Polly's dependence analysis, which I believe to be more powerful, more robust, and...

...ions: >> >> - As new transformations are built analyses have to be improved (e.g. >> past improvements to LAA to support the LoopVersioning utility, future >> improvements for full LoopSROA beyond just store->load forwarding [1] or >> the improvements to LAA for the LoopFusion proposal[2]) >> >> - As more complex loops would have to be analyzed we either improve LAA >> or make DependenceAnalysis a drop-in replacement for the memory analysis >> part in LAA >> >> >> Or we could use Polly's dependence analysis, which I believ...