similar to: [LLVMdev] dependent passes

On Sep 26, 2006, at 5:49 PM, Ryan M. Lefever wrote: > I am trying to create two passes X and Y, in which pass X depends on > pass Y. After attempting this several times it appears that pass Y > must > be in the llvm namespace. Whenever it was not in the llvm namespace, > "opt -load" would complain about undefined symbols when I called > getAnalysis<>(). Am I

I think that we are talking about two different things. I understand that in order to use LLVM classes you must either qualify them with the llvm namespace or use the statement "using namespace llvm;" What I'm saying is that it has been my experience that when a pass Y depends on another pass X, i.e, Y is a required analysis of X, then Y must be defined within the llvm

On Wed, 27 Sep 2006, Ryan M. Lefever wrote: > I think that we are talking about two different things. I understand > that in order to use LLVM classes you must either qualify them with the > llvm namespace or use the statement "using namespace llvm;" What I'm > saying is that it has been my experience that when a pass Y depends on > another pass X, i.e, Y is a

In the instructions for writing LLVM passes, it says "[c]urrently it is illegal for a ModulePass to require a FunctionPass. This is because there is only one instance of the FunctionPass object ever created, thus nowhere to store information for all of the functions in the program at the same time." I'm a little confused by that. It was my understanding that if pass X required

I have a FunctionPass F that needs a list of all the SCCs for use in its doFinalization() method. Let's say I write a CallGraphSCCPass C that creates an array of all SCCs. Let C be required by F, and let F call getAnalysis<C>() from its doFinalization() method. Am I guaranteed that C's runOnSCC() method will have executed on all SCCs before F's doFinalization() method?

So, am I correct that the implication of what you're saying is that if pass X requires pass Y, then pass Y does not necessarily run to completion on every component of a program, before pass X runs. Furthermore, if those passes X and Y are both function passes, then when pass X runs on function F, the last function Y will have run on is function F. Chris Lattner wrote: > On Fri, 22

Hi, all: I wanted to use a FunctionPass (e.g. *MemoryDependenceAnalysis*) in a ModulePass, and then I used the method "getAnalysis<* MemoryDependenceAnalysis*>(llvm::Function *)" described at http://llvm.org/docs/WritingAnLLVMPass.html#ModulePass to get the FunctionPass. But , it still crashed when I invoked this pass in tool 'opt'. However, if I change my pass to

Dear All, If I have a ModulePass that requires a FunctionPass, and I include a line like the following: <variable> = &getAnalysis<TheFunctionPass>(*Function); ... will the PassManager blindly re-run the FunctionPass each time the ModulePass requests it, or does it use the Pass dependency information to re-run the FunctionPass only when necessary. -- John T.

John, This did not work. It compiles (isDeclaration was the name of the function) and I passed a reference (&F) (F is a function pointer). I still get the opt load error from the original message (UNREACHABLE exectuted!). Thanks. On Thu, Nov 10, 2011 at 10:00 AM, Ryan Taylor <ryta1203 at gmail.com> wrote: > 1. Ok will do. > 2. Ok, will do. > 3. It's a CallGraphPass. I

On Fri, 22 Sep 2006, Ryan M. Lefever wrote: > In the instructions for writing LLVM passes, it says "[c]urrently it is > illegal for a ModulePass to require a FunctionPass. This is because > there is only one instance of the FunctionPass object ever created, thus > nowhere to store information for all of the functions in the program at > the same time." Right. >

Hi all, I am implementing a new pass for LLVM which extends Call Graph SCCPass. I need DominatorTree Information when I get to individual function. I have added AU.addrequired<DominatorTree>() and AU.addRequired<DominanceFrontier>() in getAnalysisUsage() function. But, when I get to the pass, Pass Manager gives following runtime error Unable to schedule 'Dominator Tree

On Mon, Aug 10, 2009 at 3:35 AM, gauss<gausszhch at gmail.com> wrote: > Hi, all: > > I wanted to use a FunctionPass (e.g. MemoryDependenceAnalysis) in a > ModulePass, and then I used the method > "getAnalysis<MemoryDependenceAnalysis>(llvm::Function *)"  described at > http://llvm.org/docs/WritingAnLLVMPass.html#ModulePass to get the > FunctionPass. But ,

Can I specify passes that I want run directly to llvm-gcc? I don't want all of -O3, for example. I tried llvm-gcc -raiseallocs ..., but that didn't work. I also tried running cc1 directly and it didn't take -raiseallocs as a parameter either. Duncan Sands wrote: > On Tuesday 28 April 2009 04:02:47 am Ryan M. Lefever wrote: >> I assume that when -O3 (or O2 or O1) is

In addition to the link below, please check for functions like "llvm.debug.declare", "llvm.debug.value", as you will not get LoopInfo for these.   Pankaj   ________________________________ From: Devang Patel <dpatel at apple.com> To: Ryan Taylor <ryta1203 at gmail.com> Cc: llvmdev at cs.uiuc.edu Sent: Wednesday, November 30, 2011 11:08 PM Subject: Re: [LLVMdev]

Hi all! I have sucessfully installed LLVM 1.9 under FreeBSD on a x86 PC. I have successfully executed "An Example Using the LLVM Tool Chain" that is written in the document http://llvm.org/docs/GettingStarted.html When I tried out the demo projects "Hello" and "Stacker" I get compile errors. When I run "gmake" in the directory

I don't mean to be a pain, but I was thinking about this a bit more. Does gcc ignore the const keyword? If not, why has LLVM chosen to deviate from gcc with respect to the const keyword? If so, then why do we bother using const in LLVM API code? I'm just curious and wanted to understand the thinking behind not preserving const. Thanks, Ryan Chris Lattner wrote: > This property

Solved... For the record, there were two issues: 1) I was not passing the Function to getAnalysis for the PDT. 2) I was attempting to getAnalysis on external functions. On Thu, Jul 9, 2009 at 5:49 PM, Scott Ricketts<sricketts at maxentric.com> wrote: > Update: the "unnamed pass" is PostDominatorTree. My module pass > requires PDT (specified in its getAnalysisUsage). When it

I assume that when -O3 (or O2 or O1) is passed to llvm-gcc, then it utilizes opt. How do I determine what passes opt runs? How do I determine what external tools (and arguments) llvm-gcc is invoking? Regards, Ryan

Does llvm-gcc support the -fPIC option? I am using LLVM on both 32 bit linux and 64 bit linux, if that matters. Regards, Ryan -- Ryan M. Lefever [http://www.crhc.uiuc.edu/~lefever/index.html]

On Feb 11, 2009, at 6:05 PM, kapil anand wrote: > Hi all, > > I am implementing a new pass for LLVM which extends Call Graph > SCCPass. I need DominatorTree Information when I get to individual > function. I have added AU.addrequired<DominatorTree>() and > AU.addRequired<DominanceFrontier>() in getAnalysisUsage() function. > > But, when I get to the pass,