similar to: Kaleidoscope tutorial: comments, corrections and Windows support

In http://llvm.org/docs/tutorial/LangImpl4.html#jit there's an example that optimizes calls to functions without side effects. Specifically, ready> extern sin(x); ready> extern cos(x); ready> def foo(x) sin(x)*sin(x) + cos(x)*cos(x); Read function definition: define double @foo(double %x) { entry: %calltmp = call double @sin(double %x) %multmp = fmul double %calltmp,

Hi Rob, You need to set attribute ReadOnly on the sin / cos functions, using Function::addFnAttr(Attribute) for example. Best regards, -- Arnaud de Grandmaison -----Original Message----- From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Rob Pieke Sent: Monday, November 15, 2010 11:41 AM To: llvmdev at cs.uiuc.edu Subject: [LLVMdev] Optimization of calls

Chris Lattner <clattner at apple.com> writes: > On Nov 5, 2010, at 7:11 AM, Kirk Kelsey wrote: > >> I'm wondering what the longer term plans are for the C Backend. I >> understand it's not actively developed, even deprecated. What I'm not >> clear about is whether it's something that is viewed as non-vital and >> should just as well go away, or

> You need to set attribute ReadOnly on the sin / cos functions, using > Function::addFnAttr(Attribute) for example. Hmm ... I tried setting that right after Function::Create but I still get the same result (though flagged with "readonly") declare double @sin(double) readonly declare double @cos(double) readonly define double @foo(double %x) readonly { entry: %calltmp = call

Hi I hope this is a proper place to put my question. I've compiled Kaleidoscope from "Adding JIT and Optimizer Support" tutorial. Basically it works just fine but when I try to run extern'ed putchard function it aborts. Please, tell me what am I doing wrong? Here is more information: My PC runs FreeBSD. I've copied the toy source code exactly and didn't change it.

I'm using the gvn pass, not sure about basic-aa. I've copied the code as-is from http://llvm.org/docs/tutorial/LangImpl4.html#code and added "F->addFnAttr( Attribute::ReadOnly )" after "Function *F = Function::Create(FT, Function::ExternalLinkage, Name, TheModule)". The passes it sets up are: // Set up the optimizer pipeline. Start with registering info about

I am new to llvm so I might be missing a critical step. My system is Fedora 12 but this also happens in Mac OS X 10.6.2. Here are the steps I used to compile llvm: export TARGETS=x86,x86_64,cpp export INSTALLDIR=/home/rovitotv/llvm ../llvm-2.6/configure --prefix=$INSTALLDIR --enable-bindings=none --enable-targets=$TARGETS --enable-optimized --with-llvmgccdir=$INSTALLDIR

Hi all :) I'm new to llvm! I'm going through the kaleidoscope : compiling llvm IR to object code tutorial, code in the listings breaks and causes a segmentation fault. After some investigation through gdb, probably this constructor call, causing the segfault. |Program received signal SIGSEGV, Segmentation fault.|| ||0x00000000004afee0 in

Hello, I'm working on using the LLVM JIT for a little project of mine, amazing work first off! I have a question about optimization passes. I initially have this function I've created, in python it looks like this: OS_end = 50OS_start = 0OS_timestep = 1birth_rate = .3population = 30.0for time in range(OS_start, OS_end, OS_timestep): births = birth_rate * population deaths = 0.1

Hi Rob, > Hmm ... I tried setting that right after Function::Create but I still get the same result (though flagged with "readonly") did you run the gvn pass (preceded by basic-aa)? Ciao, Duncan.

Hi David! Thanks for reaching out, the codegen part of the tutorial is fine, but when I try to generate the object code file, it throws segfault. Also please note that I'm using release build of llvm, actually I don't know whether that is the root cause or not. I also run through valgrind, it seems like a invalid read from stack. |||Error Summary: | |1 errors in context 1 of 1:

First, you have to call llvm-g++ to use the llvm-gcc front end, but it doesn't matter here. I'd like to suggest that you use pastebin to put your code and the send us the link, so that we can download it. The problem is that TheExecutionEngine is set to NULL (maybe because of a previous error), but it will be really better if you use pastebin. On Wed, Feb 17, 2010 at 6:01 AM, Todd Rovito

Don't you have the same problem with other atoms, e.g. variable names? This sounds like something that should be implemented in the language's runtime library. On May 4, 2014 7:15 PM, "Alexander Popolitov" <popolit at gmail.com> wrote: > Hi everyone! > > I'm trying to implement lisp's funcall function, which roughly calls a > function, name of which

Hi all, I am new to LLVM and have been working through the Kaleidoscope tutorial. Everything is working fine so far except for local externs (as opposed to things like the math functions, which are working). Note that I have seen this bug with the reference code listing, as well as my own code. link to code: https://llvm.org/docs/tutorial/LangImpl05.html#full-code-listing [c34n10 kaleidoscope]

Hello, > ready> ERROR: Program used external function 'putchard' which could not be > resolved! > Any idea of what could be wrong? Please make sure you're using C linkage for such functions, due to mangling the name of function being emitted is not "putchard". Something like this: extern "C" void putchard(char c) { ... } Or, just provide a mapping

This has been driving me crazy. In order to JIT stuff in a simple REPL I'm trying to wrap them in anonymous functions and then evaluate them (as per recommendation of the Kaleidoscope guide). With simple expressions it works fine. Like if I try and add 4 and 5, I get this from the bare llvm::Value dump: double 9.000000e+00 and this after it's wrapped in a function: define double @0() {

Anton Korobeynikov wrote: > > Hello, > >> ready> ERROR: Program used external function 'putchard' which could not >> be >> resolved! >> Any idea of what could be wrong? > Please make sure you're using C linkage for such functions, due to > mangling the name of > function being emitted is not "putchard". Something like this: >

You need to insert v into the basic block before the return. Note that %calltmp is absent from the dump of the function. The verifier is complaining because it found this pointer to %calltmp, but it didn't find the definition anywhere above its use. Reid On Thu, Aug 12, 2010 at 1:04 PM, alecbenzer <alecbenzer at gmail.com> wrote: > > This has been driving me crazy. In order to

I'm working on adding data detection to llvm-objdump, so it prints out raw data for symbols with type SymbolRef::ST_Data instead of disassembling them. This causes llvm/test/MC/ARM/Windows/mov32t-range.s to fail, because the symbol "truncation" comes back as SymbolRef::ST_Data, and the code gets dumped as bytes instead of disassembled. I traced the problem back to

Hi everyone, I’m currently playing with the clang driver and I encounter a strange bug. It occurs when I used the getSize function from the SymbolRef class. On iOS, the number returned is not always correct (some function have the right size). Sadly, This is my code (at the end of the main function into driver.cpp) : #### ErrorOr<OwningBinary<Binary>> BinaryOrErr =