llvm

问题 Recently, I am doing some research with LLVM . At first, I want to write a pass to instrument .bc file. Thus, it will record the execution path of the basic block of my .bc file. Then, I want to term this .bc file into .exe file. Please give me your suggestions and if you have some examples for instrumentation of LLVM, please show me. 回答1: LLVM already comes with a number of instrumentation tools built-in. Take a look in the lib/Transforms/Instrumentation directory in the source tree. One of

问题 I've recently been encountering this error when compiling OpenCL kernel files with my LLVM_IR pass: aoc: ../../../TargetRegisterInfo.cpp:89: const llvm::TargetRegisterClass* llvm::TargetRegisterInfo::getMinimalPhysRegClass(unsigned int, llvm::EVT) const: Assertion `BestRC && "Couldn't find the register class"' failed. I'm not sure what this means. What I've read from the documention doesn't make a lot of sense. Basically it means the backend doesn't know what type to place into the register?

问题 This definitely takes the cake in terms of being the largest single piece of executable code I have ever seen. Now it was a bit easier to get this whole thing built on my Mac here (I have been trying to build LLDB on a Linux as well, and currently I'm fighting with linking to Python there), for which I am thankful, but this astoundingly large executable file has me second-guessing myself... Did I do something wrong? What is inside of this monstrous archive? I did run this: % otool -TV liblldb

问题 I have two static libs that use LLVM command line to parse arguments: // lib1 void main(int argc, const char **argv) { cl::opt<bool>LibOption1( ... ) // arg1 cl::ParseCommandLineOptions(argc, argv, "lib1\n"); } . // lib2 void main(int argc, const char **argv) { // need to reset arguments list here .. cl::opt<bool>LibOption2( ... ) // arg2 cl::ParseCommandLineOptions(argc, argv, "lib2\n"); // crash here! } The app is linked against two this libs and they parse arguments just fine if having

问题 I create a class called student: class Student{ public: int getNumber() const { return number; } virtual void setNumber(int number) { Student::number = number; } private: int number; }; and converted it to IR, but there's one part confused me a lot: %class.Student = type <{ i32 (...)**, i32, [4 x i8] }> I believe the i32 (...)** part is for v-table, the i32 part is for int number and the [4 x i8] part is for alignment. But I searched the language references and could not find what i32 (...)**

问题 I've just started learning the LLVM C++ API, and I'm a bit confused about how to do type checking. There's an example my instructor has provided to me about storing a variable in stack memory as follows: llvm::AllocaInst *Alloca; Alloca = llvm::Builder.CreateAlloca(llvm::IntegerType::get(getGlobalContext(), 32), nullptr, "variable_name"); I understand this, but in the next part it talks about type checking before assigning a value to a variable. To assign a value in a Decaf statement of the

问题 I try to learm llvm assembly language. Since I did not find any tutorial for it, my way to learn is writing simple C functions, and let clang reveal the corresponding llvm code with: clang -S -emit-llvm simple.c I am now trying to learn how to use pointers. So I tested the following C function: int getVal(int* ptr) { return *ptr; } which generated the following llvm: define i32 @getVal(i32*) #0 { %2 = alloca i32*, align 8 store i32* %0, i32** %2, align 8 %3 = load i32*, i32** %2, align 8 %4 =

问题 i tried to install tiramisu compiler and once trying install it's sub-modules ( (ISL, LLVM and Halide) by using this command dina@dina-VBox:~/tiramisu$ ./utils/scripts/install_submodules.sh ./ i get the error Done installing isl #### Installing LLVM #### cd .//3rdParty/llvm .//utils/scripts/functions.sh: line 6: cd: .//3rdParty/llvm: No such file or directory and to fix it i used the command shared on the answer here ./utils/scripts/install_submodules.sh $PWD it worked better then the first

问题 I have new changed the Snow leopard with Lion OS x and Xcode 4.0.1 with 4.1. The iPhone code was working fine on Xcode 4.0.1. Now in Xcode 4.1 it giving errors mostly related to LLVM GCC 4.2. I have tried with changing the compiler's different options available. Can body know the issue and help me out of this. 回答1: I think you want to change the compiler version on the target and double click it then you have to change it from there.Try it,i may solve your problem. http://useyourloaf.com/blog

问题 How can I generate completely static binaries with clang? I have used the following command: clang -flto <source files> -o <executable output> -fuse-ld=lld -static-libgcc -lc -Bstatic -m32 And yet, the generated output depends on a certain .so file: $ ldd <executable output file> linux-gate.so.1 => (0xf77dd000) libc.so.6 => /lib/libc.so.6 (0xf75f0000) /lib/ld-linux.so.2 (0x5663b000) The following answer tries to answer the question but doesn't directly address the problem. Is it even possible