similar to: [LLVMdev] Backend optimizations

Hi, I'm writing a pass that implements a jump table with an array of blockaddress and an indirectbr instruction. It get a blockaddress in the array (via getelementptr and an index) and then jump to this basicblock via the indirectbr. I tried to compile several libraries to test my pass and the run their test-suite. It works fine with, for e.g, libTomCrypt (in -O0,1,2,3). With GMP or

Hi, I have a problem - looking for advice. I have a source code file with two functions which are compiled into a .bc file. When the bitcode file is loaded, I can dump the module and see the two functions: ... ; Materializable ; Function Attrs: noinline nounwind uwtable define void @matmul(double*, double*, double*, i32, i32, i32) #0 {} ; Materializable ; Function Attrs: noinline nounwind

On Thu, Mar 19, 2015 at 11:12 AM Rafael Espíndola < rafael.espindola at gmail.com> wrote: > Having the analogous of -O0/-O1/-O2/-O3 for the LTO pipeline makes > sense I think. > > I agree that something along option number 2 is probably the best. > Some questions: > > * Should "clang -O3 foo.o -o foo" use LTO with -O3? > * Should "clang foo.o -o

> From the department of ignorance and stupid suggestions: Run this > conversion after other passes that deal with call instructions? Yes, but my modifications are not made in a MachineFunctionPass, it's a custom inserter for an intrinsic... I'm not sure when intrinsic lowering is applied, but I guess before any MachineFunctionPass? So I'm not sure I can chosse the order at this

I ran "ninja check-asan" and no errors. But "ninja check-msan" had 117 errors. I took the first FAILED test, which was for eventfd.cc, and executed the command line creating an eventfd executable in a temporary directory and then executed that file using gdb. Finally, used bt to dump the stack. I've emailed llvm-admin at lists.llvm.org to setup an account since

+ OptLevel = opt[1] - '0'; Please check and reject things like -OX at least in the gold plugin. Can you add a test showing that * createLowerBitSetsPass is run at -O0 * the addLateLTOOptimizationPasses passes are run at -O1, but not -O0 I think the patch is fine otherwise, but wait for a review from someone on the ld64 side (Duncan, Manman or Bob for example). Thanks, Rafael

Hi, I'm trying to detect if a basicblock is part of a loop or not. I tried the llvm::LoopInfo like that (http://llvm.org/docs/doxygen/html/classllvm_1_1LoopInfo.html#a4abca289c73cd09487e05d11d9f7d877): LoopInfo *loop = new LoopInfo(); bool isLoop = loop->getLoopFor(myBB); // getLoopFor - Return the inner most loop that BB lives in. If a basic block is in no loop (for example the entry

Hi, I have a question about the llvm passes. I'm iterating over a basicblock and I can get an instruction and print it. Now, I want to iterate over the instruction and be able to modify the values of the instruction. For example, if my instruction is an add "<result> = add i32 4, %var" I want to transform it in a sub "<result> = sub i32 4, %var". I looked up

On Wed, Sep 28, 2016 at 11:13:35AM -0700, Mehdi Amini wrote: > > > On Sep 28, 2016, at 11:00 AM, Rinaldini Julien via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > > > Hi, > > > > I’m using llvm+clang (+ a wrapper for swift that allow me to use my clang to compile swift files) inside Xcode and I have encountered two issues with the new clang 3.9 and

> De : 陳韋任 [chenwj at iis.sinica.edu.tw] > Date d'envoi : mardi 8 mai 2012 11:37 > À : Rinaldini Julien > Cc: LLVM Developers Mailing List > Objet : Re: [LLVMdev] RE : svn trunk comilation error > > Hi Rinaldini, > > You probably need to illustrate what your enviroment is, what revision you > checkout and how you build LLVM. I have no problem build LLVM svn here.

> On 24 Mar 2015, at 14:55, Aaron Ballman <aaron at aaronballman.com> wrote: > > On Tue, Mar 24, 2015 at 9:48 AM, Rinaldini Julien > <julien.rinaldini at heig-vd.ch> wrote: >> Hi, >> >> I want to *tag* some functions with some *flags*. I was using annotate((“myFlag”)) and everything was working fine until I tried on ObjC method. It seems that clang just

Hi Rinaldini, In order to find information about loops inside a given function you should use something like "LoopInfo *LI = P->getAnalysis<LoopInfo>()", remembering to add "AU.addRequired<LoopInfo>();" to your getAnalysisUsage method. If the function you are interested to is not located in the module being compiled (if you created it as an auxiliary function,

Rinaldini, What exactly did you run? Specifically, you may be missing some analysis passes that are necessary for LoopInfo to have the loop information you desire. -Hal On Thu, 26 Apr 2012 14:02:04 +0000 Rinaldini Julien <julien.rinaldini at heig-vd.ch> wrote: > Hi, > > I'm trying to detect if a basicblock is part of a loop or not. > > I tried the llvm::LoopInfo

> De : 陳韋任 [chenwj at iis.sinica.edu.tw] > Date d'envoi : mardi 8 mai 2012 11:37 > À : Rinaldini Julien > Cc: LLVM Developers Mailing List > Objet : Re: [LLVMdev] RE : svn trunk comilation error > > Hi Rinaldini, > > You probably need to illustrate what your enviroment is, what revision you > checkout and how you build LLVM. I have no problem build LLVM svn here.

Hi, Sorry I did not precise that, but I'm already doing that... I have, as you say, two different director, one for source and one for build (where I run my configure)... Cheers ________________________________________ De : 陳韋任 [chenwj at iis.sinica.edu.tw] Date d'envoi : mardi 8 mai 2012 05:21 À : Rinaldini Julien Cc: LLVM Developers Mailing List Objet : Re: [LLVMdev] svn trunk

>> // Increment loop variable and jmp >> BuildMI(*MBB_erase, MBB_erase->end(), db, >> TII->get(X86::ADD64ri32),reg).addReg(reg).addImm(8); > > It looks like this instruction is defining virtual register "reg" the second time. Thx for your answer... Why would it define it again? I just want to use this register and add something to it... Cheers

Hi, I’m using llvm+clang (+ a wrapper for swift that allow me to use my clang to compile swift files) inside Xcode and I have encountered two issues with the new clang 3.9 and Xcode 8: 1) when compiling with the deployment target set to 10.0, I got this error: clang-3.9: error: invalid version number in '-miphoneos-version-min=10.0’. If I set back the deployment target to 9.3 it works fine.

Hi, Thx for your help... Here is the IR code: ; ModuleID = 'foo_bar.c' target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-unknown-linux-gnu" @.str = private unnamed_addr constant [6 x i8] c"MAIN\0A\00", align 1 ; Function Attrs: nounwind uwtable define i32 @main(i32 %argc, i8** %argv) #0 { entry: %retval = alloca i32,

Re-adding the list, below message was sent to me alone: On 11 August 2011 13:45, Rinaldini Julien <julien.rinaldini at heig-vd.ch> wrote: > Thx for all answers... > > I'll try that. But in a long term what I want to do will be a bit more complicated... It was just an example. In this case, the goal is to replace all add with sub that return the same result, like: > > var

Hi Rinaldini, You probably need to illustrate what your enviroment is, what revision you checkout and how you build LLVM. I have no problem build LLVM svn here. Have you checked tools/llvm-config/LibraryDependencies.inc is exist? Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667 Homepage: