2020年6月30日 · An LLVM-based compiler: This is a compiler built partially or completely with the LLVM infrastructure. For example, a compiler might use LLVM for the frontend and backend but use GCC and GNU system libraries to perform the final link.

2014年7月19日 · LLVM is, perhaps, two things then. LLVM-the-machine, which is the type system and instruction set, which is probably better referred to as "LLVM IR"; and LLVM-the-API, which is software for manipulating code in the LLVM IR, such as the LLVM JIT compiler, or perhaps the LLVM x86 machine code backend.

2020年8月18日 · Depending on how it is configured, clang can use gcc components, e.g: to retain compatibility. Clang, just like gcc, is a compiler, and a compiler frontend. Strictly speaking, a C++ compiler does not link code, the linker does it. Clang can use either gnu ld, gold, lld or others. Those are all linkers, some part of the gcc toolchain.

The option --with-gcc-toolchain only tells the built Clang where to look for a C++ standard library and headers, it has nothing to do with the LLVM/Clang build process.

2011年1月14日 · 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 luvverly colours.) As far as How should I establish the experiments to get a fair comparison? goes, presumably you should compare the ...

2011年7月12日 · llvm is doing quite well actually, starting with version 28 it was producing better/faster code than gcc 4.x (for the applications I tested it with). That was using it as a cross compiler not a runtime virtual machine. The number of optimization combinations with llvm as a cross compiler grow exponentially relative to what gcc can offer. You can optimize any individual file or combine the ...

2016年11月25日 · Why do people prefer LLVM IR, and how exactly is it different from the GCC IR? Is target dependency a factor here? I'm a complete newbie to compilers, and wasn't able to find anything relevant even after many hours of searching for an …

2024年3月6日 · Running with --incompatible_enable_cc_toolchain_resolution selected LLVM/CLang compiler for me and without it, I had good old GCC. In Bazel 7.0.0 the flag is set by default.

2021年10月11日 · I want clang to compile my C/C++ code to LLVM bitcode rather than a binary executable. How can I achieve that? And if I have the LLVM bitcode, how can I further compile it to a binary executable? I...

2010年7月10日 · If I build a static library with llvm-gcc, then link it with a program compiled using mingw gcc, will the result work? The same for other combinations of llvm-gcc, clang and normal gcc. I'm interested in how this works out on Linux (using normal non-mingw gcc, of course) and other platforms as well, but the emphasis is on Windows.