similar to: [LLVMdev] About hyperblock in LLVM

> So I am wondering if llvm can produce hyperblock easily,can anyone ^^^^^^^^^^ Do you mean the one mentioned in the paper below? http://www.eecs.umich.edu/~mahlke/papers/1992/mahlke_micro92.pdf Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.)

Thank you! I have read this article,and there is one dissertion about this in the attached file. What I really want to know is that if LLVM is appropriate for a block-based arch. If so,LLVM have already gained the ability to produce hyperblock or I need to write codes to let LLVM produce hyperblock? Regards, Wangwentao ,HIT On Thu, Nov 3, 2011 at 6:06 PM, 陳韋任 <chenwj

Hi, Wang After doing a little study by reading [1], it seems the hyberblock is pretty similar to the concept of bundle in VLIW. Am I right? If so, there were discussions about VLIW on the list before. Regards, chenwj [1] http://en.wikipedia.org/wiki/Explicit_Data_Graph_Execution -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.)

Hi ,Chen Thanks for your answer.Maybe there are some common things,but I think hyperblock is more complex. I will see the topics about VLIW.Thank you for the direction. By the way ,what do you use LLVM for ?[?] Anyway,you are a kind hearted man.Thank you! Regards, Wangwentao ,HIT On Thu, Nov 3, 2011 at 6:18 PM, 陳韋任 <chenwj at iis.sinica.edu.tw>

OK, Let me describe. There is nothing wrong with if-conversion in LLVM. The algorithm implemented in LLVM can handle the if(???){do something} and if(???){do something}else{do something else} case very well. But it can handle complicated case like when there are a lot of gotos in the program. The more systematic way to do if-conversion is based on Hyperblock [Scott A. Mahlke et al 1992]

On Mon, Nov 07, 2011 at 09:34:04PM -0800, Andrew Trick wrote: > On Nov 3, 2011, at 3:20 AM, 王文涛 wrote: > > If so,LLVM have already gained the ability to produce hyperblock or I need to write codes to let LLVM produce hyperblock? > > You will not be able to represent hyperblocks without developing your own extensions to the IR. The extent to which you would be able to reuse LLVM

On Nov 3, 2011, at 3:20 AM, 王文涛 wrote: > If so,LLVM have already gained the ability to produce hyperblock or I need to write codes to let LLVM produce hyperblock? You will not be able to represent hyperblocks without developing your own extensions to the IR. The extent to which you would be able to reuse LLVM optimizations after converting to your hyperblock IR (if at all) would depend on

Hi, Are you guys interested in implementing if-conversion as a GSoC 2015 project? Last year, I did a literature review about approaches of if-conversion and the if-conversion in LLVM. This was the undergraduate thesis of my bachelor degree. It seems that, the if-conversion used in LLVM is a very simple approach instead of following the literature. So I want to implement the approaches in the

I thought I'd share a little bit of progress I made this weekend. I've gotten the first interesting test-case (a simple switch) through hyperblock-based DAGISel, and there's a pretty picture too! Each part of the switch is emitted directly into the DAG, rather than being deferred. This is the function: define i32 @foo(i32 %x, i32 %z) nounwind { entry: switch i32 %x,

Very nice! Why did you decide on hyperblock instead of SEME region and how are you forming the blocks? Evan On Apr 20, 2008, at 9:59 PM, Christopher Lamb wrote: > I thought I'd share a little bit of progress I made this weekend. > I've gotten the first interesting test-case (a simple switch) > through hyperblock-based DAGISel, and there's a pretty picture too! >

On 30.8.2011, at 19.19, Eli Friedman wrote: > reg2mem won't do quite this transformation... not sure exactly what you need. I need to get rid of phis. This code is compiled from C++ and for some functions there are no phis, but multiple call instructions. I am targeting hardware in the end, and the next tool reading the IR does not like phis when it's generating VHDL. My questions may

> the next tool reading the IR does not like phis when it's generating VHDL. If you're doing a conversion from LLVM IR to some other non-SSA IR (like the tool's), you can do the phi node removal yourself as you convert. Basically, every predecessor block referenced by a phi node will have an assignment to that variable before branching. There are techniques to make the resultant

The project I am working on is to use the llvm toolchain for embedded CGRA processors . This however poses some restrictions on the block formation, because modulo scheduling is applied in a later stage. For this reason the idea was to create custom pragma's to generate metadata and attach it to de branches of loops we wanted to map on a cgra module. It is a lot similar to the loop parallell

Hi, I'm very interested in the quality of the codes generated by LLVM. Has anyone done performance comparision among llvm, gcc, and native compilers on x86 or sparc for SPEC CPU2000 or other large benchmarks? thanks. Qiong

Hi, On Fri, Jun 4, 2010 at 5:18 AM, Pekka Nikander <pekka.nikander at nomadiclab.com> wrote: >  Would the best way be to add an option to -loop-unroll, and hack away at lib/Transforms/Utils/LoopUnroll.cpp? Instead, the better alternative is to write another pass similar to LoopUnrollPass.cpp (say LoopPeelPass.cpp) and add new option -loop-peel. The new pass could use llvm::UnrollLoop()

There's some support for metadata on MI and definitely on the IR. What do you have in mind and what are you doing? -eric On Fri, Apr 12, 2013 at 7:37 AM, Michael D'Hont <michael.dhont at ugent.be> wrote: > Is there any way to work with the metadata inside llc? Or is there a > specific reason why metadata is not supported inside llc? Because as I see > it the metadata

Is there any way to work with the metadata inside llc? Or is there a specific reason why metadata is not supported inside llc? Because as I see it the metadata get's completely removed during instruction selection. I would like to use the metadata to influence Loop Specific transformations and if-conversion. Kind Regards Michael D'hont -------------- next part -------------- An HTML

Hi Andy, thank you for your respond, On 09/06/12 21:32, Andrew Trick wrote: > > On Sep 4, 2012, at 9:05 AM, Tomas Minac <minac.tomas at gmail.com > <mailto:minac.tomas at gmail.com>> wrote: > >> >> Hello, >> >> I am member of research team on our Faculty of Information Technology >> (university VUT in Brno Czech Republic). We use LLVM for

Hi all, While developing compile-time instrumentation for ThreadSanitizer (http://code.google.com/p/data-race-test) I need to generate SEME regions without loop and call instructions (I'll call them superblocks hereafter, although some researchers do allow loops in their definition of superblocks). This is necessary to get the largest piece of IR in which the memory operations can be

On Sep 4, 2012, at 9:05 AM, Tomas Minac <minac.tomas at gmail.com> wrote: > > Hello, > > I am member of research team on our Faculty of Information Technology (university VUT in Brno Czech Republic). We use LLVM for many projects and actually we want to create system, which will be able compile and profile aplication for VLIW processors in few iterations. > We want to load