llvm

I have to fix some existing code that builds just fine with LLVM (on iOS) so that it builds with llvm-gcc-4.2 too. I'm done with pretty much everything, except this pattern which is found at a few places: @property (nonatomic, retain) __block id myProperty; I suspect the intent here is to allow access to the property from inside a block without retaining self . How can I remove the __block attribute, which gcc doesn't support here, but still achieve the same effect? I'll suggest you've found a compiler bug, the declaration: @property (nonatomic, retain) __block id myProperty; is meaningless.

I need to implement a library that compiles C code to eBPF bytecode using LLVM/Clang as backend. The codes will be read from memory and I need to get the resultant assembly code in memory too. Until now, I have been able to compile to LLVM IR using the following code: #include <string> #include <vector> #include <clang/Frontend/CompilerInstance.h> #include <clang/Basic/DiagnosticOptions.h> #include <clang/Frontend/TextDiagnosticPrinter.h> #include <clang/CodeGen/CodeGenAction.h> #include <clang/Basic/TargetInfo.h> #include <llvm/Support/TargetSelect.h> using namespace std; using namespace

My question is regarding the CPP backend, does it serve the same purposes as the C backend? The C backend was one of my favorite LLVM features, and I'm very upset it was removed. Whats the real differences? I' most appreciative of any help. Reference: The LLVM 3.1 Release Notes "The C backend has been removed ..." The CPP backend creates LLVM API calls to create an AST that represent the equivalent of the LLVM assembly. You can try the CPP backend at http://llvm.org/demo/ by selecting the "LLVM C++ API code" Target . The C backend creates C code that execute the semantics of the LLVM assembly.

I've discovered (below) that I need to use -fblocks when compiling code which uses blocks. What library do I need to link against to let the linker resolve _NSConcreteStackBlock? (On Ubuntu 9.10 AMD64.) chris@chris-desktop:~$ clang ctest.c ctest.c:3:25: error: blocks support disabled - compile with -fblocks or pick a deployment target that supports them void call_a_block(void (^blockptr)(int)) { ^ ctest.c:11:19: error: blocks support disabled - compile with -fblocks or pick a deployment target that supports them call_a_block( ^(int y) { ^ 2 diagnostics generated. chris@chris-desktop:~$ clang

I'm trying to follow along with the LLVM tutorial on compiler implementation, but my code segfaults when I try to emit object code. Here's a minimal example that attempts to compile a function func . To keep things simple, func is a function that does nothing. #include <iostream> #include <llvm/ADT/Optional.h> #include <llvm/IR/BasicBlock.h> #include <llvm/IR/DerivedTypes.h> #include <llvm/IR/Function.h> #include <llvm/IR/IRBuilder.h> #include <llvm/IR/LLVMContext.h> #include <llvm/IR/LegacyPassManager.h> #include <llvm/IR/Module.h> #include <llvm/IR/Type.h> #include <llvm/IR/Verifier.h>