similar to: [LLVMdev] The 2 ways of building for Windows

When the .bc file contains an array as the following: @.str = private global [7 x i8] zeroinitializer "llc -march=x86" generates the following x86 assembly lines: .data .lcomm L_.str,7 And trying to compile it with clang generates an error: "fatal error LNK1143: invalid or corrupt file: no symbol for COMDAT section 0x3". Is that fixable? Thanks! Alon

I'm following the instructions here: http://clasg.llvm.org/get_started.html and, while running cmake, I get: > CMake Error at cmake/modules/LLVM-Config.cmake:141 (message): > Library `vectorize' not found in list of llvm libraries. > Call Stack (most recent call first): > cmake/modules/LLVM-Config.cmake:54 (explicit_map_components_to_libraries) >

On Mar 22, 2012, at 11:40 AM, Paul J. Lucas <paul at lucasmail.org> wrote: > On Mar 22, 2012, at 12:28 AM, Bill Wendling wrote: > >> On Mar 20, 2012, at 7:38 PM, Paul J. Lucas wrote: >> >>> I've read the docs on LLVM exceptions, but I don't see any examples. A little help? >> >> I don't think this has anything to do with LLVM's

On Oct 2, 2012, at 2:34 PM, Eli Friedman <eli.friedman at gmail.com> wrote: > On Tue, Oct 2, 2012 at 11:33 AM, Paul J. Lucas <paul at lucasmail.org> wrote: > >> My understanding is that, in order to use GEP, you have to provide the LLVM code with the struct layout, i.e., build a StructType object. In my case, that struct is declared in C++ code already and, in order to

Switching to CodeGenOpt::None reduced the execution time from 5.74s to 0.84s. By just tweaking things randomly, changing to CodeModel::Small reduced it further to 0.22s. We have some old, ugly, pure C++ code that we're trying to replace (both because it's ugly and because it's slow). It's execution time is about 0.089s, so that's the time to beat. Hence, I'd like to

I've been profiling more; see <https://dl.dropbox.com/u/46791180/perf.png>. One thing I'm a bit confused about is why I see a FunctionPassManager there. I use a FunctionPassManager at the end of LLVM IR code generation, write the IR to disk, then read it back later. Why is apparently another FunctionPassManager being used during the JIT'ing of the IR code? And how do I

On Mar 22, 2012, at 5:29 PM, Bill Wendling wrote: > On Mar 22, 2012, at 11:40 AM, Paul J. Lucas <paul at lucasmail.org> wrote: > >> Unfortunately, I'm not following. How is having the code that catches all exceptions in a separate function different from what I proposed (putting the try/catch in the thunks)? (Ideally, I want to minimize layers of function calls.) Again

On Oct 1, 2012, at 9:58 PM, Eli Friedman <eli.friedman at gmail.com> wrote: > Using GEP on an i8* is a bit nicer to the optimizer, though, because > using ptrtoint/inttoptr has effects on alias analysis. My understanding is that, in order to use GEP, you have to provide the LLVM code with the struct layout, i.e., build a StructType object. In my case, that struct is declared in C++

These two subclasses of X86TargetMachine are basically identical. The *only* thing that's different is the constructor. And that *only* differs in the is64Bit argument that it passes to the X86TargetMachine constructor. Replacing the hard-coded 'true' or 'false' with 'Triple(TT).getArch()==Triple::x86_64' makes them *actually* identical. Can we just ditch the

On Apr 8, 2012, at 10:40 PM, Bill Wendling wrote: > On Apr 8, 2012, at 8:47 AM, Paul J. Lucas wrote: > >> But I assume [the personality function] works only for a *nix/g++ system. My code also needs to work when compiled on Windows using Visual Studio and I'm guessing that it needs a different personality function. Where do I get that? > > That's not something

Using the LLVM demo <http://llvm.org/demo/> with this code: > int G; > > struct E { > }; > > struct S { > ~S(); > void throw_it(); > }; > > S::~S() { > ++G; > } > > void S::throw_it() { > throw E(); > } > > int main() { > S s; > s.throw_it(); > } and selecting C++ as the source language an "LLVM C++ API

I followed the build instructions for LLVM+clang -- that all went OK. But compiling a simple "hello world" program with clang++ gives a linker error -- see attached log file. - Paul -------------- next part -------------- A non-text attachment was scrubbed... Name: build.log Type: application/octet-stream Size: 1881 bytes Desc: not available URL:

Attempting to use VC++ 2008 Express, when I try to link a test program, I get a bunch of symbols like __imp_open not found. Attempting to use VC++ 2010 Express, I get "Solution Folders are not supported" so, although it will build, there's no way to build the INSTALL target. - Paul

Given this small program: > #include <llvm/DerivedTypes.h> > #include <llvm/LLVMContext.h> > > using namespace llvm; > > int main( int argc, char const *argv[] ) { > LLVMContext &ctx = getGlobalContext(); > > Type *void_type( Type::getVoidTy( ctx ) ); > PointerType *void_ptr_type( void_type->getPointerTo() ); > > return 0; > }

I'm using the LLVM C++ API to create code on-the-fly for execution. This works fine. But what if I want to save this code to disk, quit, relaunch my app at some later time, reload the previously generated code off disk, and execute it? How can I do that? Can somebody point me to some documentation or examples? Thanks. - Paul

I'm using the IRBuilder C++ API to generate LLVM IR code and execute it on-the-fly. I know about Module::dump() to print the IR code, but is there any way to print out the native assembly code (x86 in my case)? - Paul

Using the LLVM C++ API, if I want to create an array via an Alloca instruction like: Value *a = ir_builder.CreateAlloca( my_type, my_size ); and then I want to initialize each element of the array with values computed elsewhere like: for ( vector<Value*>::const_iterator i = v.begin(); i != v.end(); ++i ) { builder.CreateStore( *i, a ); // How do I increment 'a' to point to

Previously I had asked how to write then read back IR to/from a file. The write code looked like: LLVMContext ctx; SMDiagnostic diag; Module *m = ParseIRFile( "my_file", diag, ctx ); However, the code I'm trying to retrofit LLVM IR into passes me just a std::ostream&. How can I read IR from a std::ostream? I figured out how to use raw_os_ostream to adapt a

On Mar 22, 2012, at 12:28 AM, Bill Wendling wrote: > On Mar 20, 2012, at 7:38 PM, Paul J. Lucas wrote: > >> I've read the docs on LLVM exceptions, but I don't see any examples. A little help? > > I don't think this has anything to do with LLVM's IR-level exception system. It sounds to me like you just need a way to handle C++ exceptions inside of the C++ code

On Tue, Oct 2, 2012 at 11:33 AM, Paul J. Lucas <paul at lucasmail.org> wrote: > On Oct 1, 2012, at 9:58 PM, Eli Friedman <eli.friedman at gmail.com> wrote: > >> Using GEP on an i8* is a bit nicer to the optimizer, though, because >> using ptrtoint/inttoptr has effects on alias analysis. > > My understanding is that, in order to use GEP, you have to provide the