llvm

I want to copy these set of instructions from one part and paste to that in another part in IR %0 = load i32, i32* @x, align 4 %1 = load i32, i32* @y, align 4 %add = add nsw i32 %0, %1 %2 = load i32, i32* @n, align 4 %cmp = icmp slt i32 %add, %2 %conv = zext i1 %cmp to i32 Assuming you are using C++ API, you will just have to clone each instruction separately while fixing references between them. Something like the following: llvm::ValueToValueMapTy vmap; for (auto *inst: instructions_to_clone) { auto *new_inst = inst->clone(); new_inst->insertBefore(insertion_pos); vmap[inst] = new_inst; llvm

I'd like to use clang on my Xcode iPhone project. However this is the getting started guide: http://clang.llvm.org/get_started.html I've been working with Xcode for a year but this is far far far from being understandable to me! Can anyone explain in plain english how to install and use Clang with my existing iPhone project? I am not familiar with loading things from the console. Thanks! Dan Ben Gottlieb Nikita Zhuk has wrapped Clang in a GUI and made it available at http://www.karppinen.fi/analysistool/ . Very useful. Download and extract the clang distribution to some directory. Optionally

I try to understand LLVM program high level structure. I read in the book that " programs are composed of modules ,each of which correspons to tranlation unit ".Can someone explain me in more details the above and what is the diffrenece between modules and translation units(if any). I am also interested to know which part of the code is called when translation unit starts and completes debugging information encoding? Translation unit is term from language standard. For example, this is from C (c99 iso draft) 5.1 Conceptual models; 5.1.1 Translation environment; 5.1.1.1 Program structure A C

I am trying to find the alias between a store instruction's pointer operand and function arguments. This is the code, virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequiredTransitive<AliasAnalysis>(); AU.addPreserved<AliasAnalysis>(); } virtual bool runOnFunction(Function &F) { AliasAnalysis &AA = getAnalysis<AliasAnalysis>(); for(Function::iterator i=F.begin();i!=F.end();++i){ for(BasicBlock::iterator j=i->begin();j!=i->end();++j) { if(dyn_cast<StoreInst>(j)){ const StoreInst *SI=dyn_cast<StoreInst>(j); AliasAnalysis::Location LocA = AA.getLocation(SI); const Value *si_v= SI-

Function *fun = call->getCalledFunction(); getCalledFunction(); returns null if it's indirect call. How can I get the name of the function or the name of the pointer? I found all questions in Stack Overflow related to this issue talked about function name of direct call, or type of pointer. I just want to track cases like this one: void foo(){} void goo(){} void main(){ int x = 1; void (*p)(); if(x) p = &foo; else p = &goo; p(); // print the called function name } firefroge I get the same problem. Here is my solution after reading the llvm source code: Function* fp = CI->getCalledFunction();

Address-Sanitizer https://code.google.com/p/address-sanitizer/wiki/AddressSanitizer I have compile my own llvm (pretty straight forward compiling) because apple's llvm not support this function. I have tested the clang for mac command line program, it works (but without showing the line the sourcecode). for iOS, there is still some problems: compile simulator version : report error for pre-compiled header: In file included from /Users/fluke/Documents/projects/tmp/testAsanNoARC/testAsanNoARC/testAsanNoARC-Prefix.pch:12: In file included from /Applications/Xcode.app/Contents/Developer/Platforms