search for: acyclicity

Hi, Regarding the mischeduler, I wonder // For loops that are acyclic path limited, aggressively schedule for // latency. This can result in very long dependence chains scheduled in // sequence, so once every cycle (when CurrMOps == 0), switch to normal // heuristics. if (Rem.IsAcyclicLatencyLimited && !Zone->getCurrMOps() && tryLatency(TryCand, Cand, *Zone))

This proposal adds support for path profiling [Ball96] to LLVM. Path profiling compactly represents acyclic paths in a directed acyclic graph representation of the control flow graph of a routine. Instrumentation can be added to uniquely identify paths executed at runtime. Path profiles enable precise enumeration of the sequence of basic blocks executed in order for a particular path. Using path

Hi all, A while ago there was a discussion on changing the current "set of trees" representation of TBAA metadata to be more expressive, prompted by the need to support C structs. Dan Gohman also talked about the issue here: http://llvm.org/devmtg/2012-11/Gohman-AliasAnalysis.pdf. It was suggested that the trees be replaced by a type DAG then. While working on this compiler

Dear all, Is there a function in R that checks transitivity and acyclicity of a given nXn matrix with entries representing a decision-maker's comparisons of n objects? Like 0 1 0 1 1 1 0 0 0 1 0 0 1 0 0 0 1 1 0 0 1 0 0 0 0 1 0 1 0 1 0 1 0 1 0 0 1 represents xPy and 0 represents ~xPy. Is there a vectorized solution to this? n can be quite large. Thanks in advance,...

Hi, Is there is any R package or existing codes in R to detect cycles in a graphical model or DAG  (Directed Acyclic Graph) ? Thanks. [[alternative HTML version deleted]]

Below is a proposal for a new "convergent" intrinsic attribute and MachineInstr property, needed for correctly modeling many SPMD/SIMT programming models in LLVM. Comments and feedback welcome. —Owen In order to make LLVM more suitable for programming models variously called SPMD and SIMT, we would like to propose a new intrinsic and MachineInstr annotation called

Hi, How might I use xyplot to plot segments where the segments are in the input data? (ie a directed acyclic forest). Here's an example in base graphics: n = data.frame(id = c(1,2,3,4), parent = c(0,1,2,2), value = c(5,5.5,7,3), date = c(1,2,3,3.5)) plot(n$date, n$value) do.call( segments, with( merge(n,n,by.x="parent", by.y="id"),

Aloha all, I have an adjacency matrix for an acyclic digraph that contains transitive relations, e.g. (u,v), (v,w), (u,w). I want a DAG with only intransitive relations. Can someone point me to an R function that will take my adjacency matrix and give me back one with only intransitive relations? In the example, I'd like to get rid of (u,w) and keep (u,v) and (v,w). All the best, Tom --

Hello all, I have some question about usage of TableGen when adding a new LLVM Backend. There are three place to use TableGen in basic steps of document "Writing an LLVM Compiler Backend": 2. Describe the register set of the target. Use "TableGen" to generate code for register definition, register aliases, and register classes from a target-specific RegisterInfo.td input

Why is this a regalloc problem? I assume in the example below the "r0" is somehow forced by the ABI? Because otherwise moving the texture2d operation into the branch wouldn't matter as long as we assign different registers to the two branches and use a technique like lib/Target/R600/SIFixSGPRLiveRanges.cpp. - Matthias > On May 13, 2015, at 6:00 PM, Philip Reames <listmail at

Hi Jingyue, Convergent is not intended to prevent inlining. It’s tricky to formalize this inter-procedurally, but the intended interpretation is that a convergent operation cannot be move either into or out of a conditionally executed region. Normal inlining would not violate that. I would imagine that it would make sense to use a combination of convergent and noduplicate for barrier-like

On 07/03/2013, at 1:45 AM, Daniel Berlin <dberlin at dberlin.org> wrote: > On Wed, Mar 6, 2013 at 4:23 AM, Tran Ma <tranma at cse.unsw.edu.au> wrote: >> It was derived from what I read in Dan Gohman's slides about one of the >> possible forms a type DAG could take. Your forest is what we should get in >> the current tree representation (I believe), so when we

Hi, I am planning to generate code for a peculiar architecture with _no_ branch instructions (!), but with predicated loads and stores to memory. This means the architecture is not Turing complete, is going to waste a lot of computation, and any input program that can hope to get compiled for this architecture must have loops that can be fully unrolled, and all its functions must get fully

On Mon, 2018-06-18 at 10:35 -0400, pisymbol via samba wrote: > Small addendum, I did try: > > ./configure --nonshared-binary=ALL > > ERROR: source source3/smbd/notify_msg.c is in more than one subsystem of > target 'smbstatus': ['smbd_base.objlist', 'smbstatus.objlist'] > > This is CentOS 7.5. > > -aps Building more than smbd and

I am thinking about writing a new open source spreadsheet application since I think the spreadsheet applications out there (Microsoft Excel, LibreOffice Calc, etc.) do not have some features that I would really like to use. I would like the spreadsheet to recalculate very fast and wondered if it would make sense to use LLVM to calculate the cell values quickly. Each cell of a spreadsheet

Dear R developers, these days I'm working on some R code for fitting completely generic Bayesian Hierarchical Models in R, a la OpenBUGS and JAGS. A key feature of OpenBUGS and JAGS is that they automatically build an appropriate MCMC sampler from a generic model, specified as a directed acyclic graph (DAG). The spirit of my (would-be) implementation is instead more focused on experimentation

On Thu, Jan 28, 2016 at 8:34 PM, Dylan McKay <dylanmckay34 at gmail.com> wrote: > Try visualising the DAG like this. > > ``` > ---- GPR:$rA > / > set GPR:$rd ---- add > \ > ---- GPR:$rB > ``` > > Each instruction forms a DAG with its operands being subnodes. > >

On Mar 9, 2011, at 2:13 PM, Lu Mitnick wrote: > Hello all, > > I have some question about usage of TableGen when adding a new LLVM Backend. There are three place to use TableGen in basic steps of document "Writing an LLVM Compiler > Backend": > > 2. Describe the register set of the target. Use "TableGen" to generate code for register definition, register

Hi Mehdi, My reading of it is that if you have a convergent instruction A, it is legal to duplicate it to instruction B if (assuming B is after A in program flow) A dominates B and B post-dominates A. James On Fri, 14 Aug 2015 at 08:32 Mehdi Amini via llvm-dev < llvm-dev at lists.llvm.org> wrote: > On Aug 13, 2015, at 9:43 PM, Owen Anderson via llvm-dev < > llvm-dev at

I'm confused about how to specify DAG patterns for a given instruction Here is an example for my target class ALU1_RR<bits<4> subOp, string asmstr, SDNode OpNode> : ALU_RR<subOp, asmstr, [(set GPR:$rD, (OpNode (i32 GPR:$rA), (i32 GPR:$rB)))]>; def ADD : ALU1_RR<0x0, "l.add", add>; The set operation simply creates a list. The add operation