llvm

I need to print the type of a parameter in a C++ source file using the clang API. If I have a parameter representation in clang ( ParmVarDecl* param ) I can print the name of the parameter using param->getNameAsString() . I would need a method param->getTypeAsString() , but there is no such method. So is there another way to do this task? Got the answer to my question in the llvm irc: There is a method std::string clang::QualType::getAsString(SplitQualType split) So this does work for me: ParmVarDecl* param = *someParameter; cout << QualType::getAsString(param->getType().split()) << endl; You

So I'm doing some refactoring and it's really annoying that I don't get all the errors up front. How can I either increase the limit or remove the limit, so that the compiler will output all the errors it can find? Erik B So I found how to do it. You add this compiler flag: -ferror-limit=0 0 means that it will not stop because of too many errors. This seems to be a question and answer that explains how to add a compiler flag in Xcode 4: Xcode Project-Wide compiler flag Maybe this: Preferences > General > Continue Building After Errors https://developer.apple.com/library/ios/recipes/xcode_help

I have a 64-bit version of llvm-gcc, but I want to be able to build both 32-bit and 64-bit binaries. Is there a flag for this? I tried passing -m32 (which works on the regular gcc), but I get an error message like this: [jay@andesite]$ llvm-gcc -m32 test.c -o test Warning: Generation of 64-bit code for a 32-bit processor requested. Warning: 64-bit processors all have at least SSE2. /tmp/cchzYo9t.s: Assembler messages: /tmp/cchzYo9t.s:8: Error: bad register name `%rbp' /tmp/cchzYo9t.s:9: Error: bad register name `%rsp' ... This is backwards; I want to generate 32-bit code for a 64-bit processor

I have been trying to see if I can optimize the case when having many small vectors of data. In my use case there may be 100,000+ of these vectors so the size of the vector storage is critical. Each may only have 1 or 2 elements at times but may grow larger capacities in many cases. I have tried using a simple std::vector but this is incredibly slow as it allocates N small buffers on the heap which wastes memory and takes far too long in a time-critical environment. Effectively a small-buffer-optimization (SBO) on a vector seems to look like a viable solution. This means the internal (i.e.

I want to use the LLVM code generation Framework from Java. I.e., I do not want to compile Java code into LLVM. I simply want an LLVM library for code generation that I can call from Java. The usual LLVM library is C, so I cannot use it. Are there any Java ports? If no, what would be the easiest way to do it anyway? Wrap the API into JNI? A quick search for llvm java api bindings turned out several projects that seem like a good fit: LLVM-J JLLVM LAJ All of those libraries use JNI to access the C-API, so you have a DLL or SO file of the LLVM itself in any case. To answer the question with more

I compared gcc and llvm-gcc with -O3 option on hmmer and mcf in spec cpu2006 benchmark. Surprisingly, I found gcc beat llvm-gcc for both cases. Is it because the -O3 has different meanings? How should I establish the experiments to get a fair comparison? BTW, I did the experiment by ONLY changing cc in the makefile. Thanks, Bo bobbogo You seem surprised that gcc beat llvm on your benchmark. Phoronix hosts a bunch of interesting benchmarks in this area. For instance, have a look at: Benchmarking LLVM & Clang Against GCC 4.5 . Compiler Benchmarks Of GCC, LLVM-GCC, DragonEgg, Clang ∶ (Lots of