similar to: [LLVMdev] MachineBasicBlocks Cloning

Hello, I was looking at how the memory for MachineBasicBlocks is managed and something seems strange. On one hand, a MachineFunction uses a recycling allocator to create and destroy MBBs without costly heap allocation (the same is done for MachineInstrs, MachineOperands, etc.). On the other hand, each MBB also has a number of STL vectors within it. For example, for Predecessors, Successors,

Hi all, as soon as I try to split MachineBasicBlocks the resulting programs suffer from segmentation faults. I have reproduced the error using a simple MachineFunctionPass in the X86 backend that splits MachineBasicBlocks before CALL32m instructions (and inserts a fallthrough-jmp). The MachineFunctionPass is plugged into X86TargetMachine::addPreRegAlloc. The split-method is basically stolen from

I want to be able to do two things with LLVM (both just before code emission): 1. Insert a MachineBasicBlock just before a MachineBasicBlock. There is a function called AddPredecessor(). However, the comment says that it does not update the actual CFG. I want to redirect all CFG edges that are incoming to this MachineBasicBlock to the new one I create, and add just one outgoing edge (no branch)

Hello. I just tried (as my first attempt in xenning) to set up a lenny amd64 domU on a partitionable Mirror RAID (/dev/md_d0p1 - /dev/md_d0p4), using the Debian installer from "people.debian.org/~joeyh/d-i/images/daily/". The partitions of the md will be represented inside the domU as /dev/xvda1-4 accordingly. The dom0 seems to run fine, it''s Xen 3.2.1 on amd64 lenny. The

On Sep 2, 2010, at 2:44 PMPDT, Jeff Kunkel wrote: > I need to track which MachineBasicBlocks branch into other > MachineBasicBlocks. How do I do it? Look at the Predecessor/Successor lists, which are target-independent > I see a MachineOperand can hold a MachineBasicBlock*. Does this mean > the instruction may branch to the MachineBasicBlock, or can it be > something like an

Dear Users, I have the following text plotted inside a graphic: text(16200, 2.8*0.97, expression(NH[3]==0.33-1.1 %*% 10^-5 %*% day), adj=c(1,1)) I need to include square brackets in the expression around the ammonia to have it plotted like that: [NO3-]. I tried instinctively to use %[% to plot the brackets, but it did not work. Does anybody of you know what is the correct syntax to plot

  Hello, I am trying to clone a machine basic block when I ran into some issues, where I am not able to make some headway. Any of yours help is highly appreciated here: My question is about Machine Basic Block Duplication:   -          Is there a utility to clone a MachineBasicBlock in LLVM? I found utility to clone machineInstrs, but couldn’t find similar utility for MachineBasicBlock. So, I

On Mon, Jun 27, 2016 at 3:29 PM, Chris Lattner <clattner at apple.com> wrote: > On Jun 27, 2016, at 8:26 AM, Hans Wennborg via llvm-dev <llvm-dev at lists.llvm.org> wrote: >> That's what concerns me about going to the scheme Richard and Rafael >> suggested, of bumping the major version each time: we'd release 4.0, >> and would Tom's dot-release then be

On Wed, 2010-04-14 at 17:30 -0700, Hisham Chowdhury wrote: > > > > - Is there a utility to clone a MachineBasicBlock in LLVM > > > > > > There is CloneBasicBlock routine in ./lib/Transforms/Utils/CloneFunction.cpp - Sanjiv > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu

Is there any way to tell where in the Instruction list, the branch to the other MachineBasicBlock happens? I know in the BasicBlock had a nice api for it. Thanks, Jeff Kunkel On Thu, Sep 2, 2010 at 5:56 PM, Dale Johannesen <dalej at apple.com> wrote: > > On Sep 2, 2010, at 2:44 PMPDT, Jeff Kunkel wrote: > >> I need to track which MachineBasicBlocks branch into other

Thank you! The pieces are starting to fall into place finally. I need to track which MachineBasicBlocks branch into other MachineBasicBlocks. How do I do it? I see a MachineOperand can hold a MachineBasicBlock*. Does this mean the instruction may branch to the MachineBasicBlock, or can it be something like an object reference? - Thanks, Jeff Kunkel On Thu, Sep 2, 2010 at 1:56 PM, Jeff Kunkel

Hello guys, I plan to do some pre register allocation optimizations. I already know my way around LLVM but I could use some more experience. I need a way to reorder instructions inside MachineBasicBlocks or MachineFunctions. I've been searching for it but I have not found an example in the code yet. Can someone point me where I should look for? ty, -- Emilio Wuerges LAPS - Laboratorio

It is at the end allowing for oddities like debug info and multiple branches. You might want to look at AnalyzeBranch. On Sep 2, 2010, at 4:19 PMPDT, Jeff Kunkel wrote: > Is there any way to tell where in the Instruction list, the branch > to the other MachineBasicBlock happens? I know in the BasicBlock had > a nice api for it. > > Thanks, > Jeff Kunkel > > On Thu,

> I need a way to reorder instructions inside MachineBasicBlocks or > MachineFunctions. > I've been searching for it but I have not found an example in the code yet. For MachineBasicBlocks, check out this doc: http://llvm.org/doxygen/classllvm_1_1MachineBasicBlock.html I believe its basically the same as basic blocks in that you can manipulate the instruction list. Otherwise, you

Hi all, I am still stumped on the same bug. Did anyone try to insert MachineBasicBlock into a MachineFunction? Any advice will be appreciated. Thanks a lot in advance. ~Bin ---------------------------------------------------------------------------------------------------------------------------- Thanks a lot Jeff. I changed the setNumber function call to

After a bunch more investigate, I've seem to have figured out what is going on here. The MachineFunction holds a vector of MachineBasicBlocks and it is this vector that is traversed by the MachineFunction iterator when printing out instructions. The problem is occurring when a modification to the CFG moves around so that the ordering of them is different. Even if the pred/succ blocks are

Hi all, I am really stumped on a problem for long. I could not figure out why. That is why i am here. OK, here is the problem: I tried to insert a MachineBasicBlock into a function. Here is the code snippet: // insert a machine basic block with the error_label into MF and before I // Pred is the predecessor of the block to be inserted // the new basic block is inserted right before I void

Thanks Matthias I can also use the method intervalIsInOneMBB() from LiveIntervals class to relate a LiveInterval to a MachineBasicBlock, right? Em 04/09/2015 2:26 PM, "Matthias Braun" <mbraun at apple.com> escreveu: > There is no direct support for this, but you can use > LiveIntervalAnalysis::getMBBStartIndex()/getMBBEndIndex()/getMBBFromIndex() > to relate the

On Mon, Jun 27, 2016 at 3:38 PM Hans Wennborg via lldb-dev < lldb-dev at lists.llvm.org> wrote: > On Mon, Jun 27, 2016 at 3:29 PM, Chris Lattner <clattner at apple.com> wrote: > > On Jun 27, 2016, at 8:26 AM, Hans Wennborg via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> That's what concerns me about going to the scheme Richard and Rafael >

> On May 11, 2016, at 1:12 PM, Francois Pichet <pichet2000 at gmail.com> wrote: > > Hello, > > Regarding the problem of debug range for optimized code. > Currently a DEBUG_VALUE will be inserted after the <def>vregX > DEBUG_VALUE are only valid until the end of the current MachineBasicBlock. That's the main problem. > Why not simply iterate over all uses