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To be fair for point 1, if you have LLVM IR you can just run the full LLVM optimizer suite over it. But overall LLVM IR is a poor target because it constantly c
by connicpu 3y ago
To be fair for point 1, if you have LLVM IR you can just run the full LLVM optimizer suite over it. But overall LLVM IR is a poor target because it constantly changes with every LLVM release.
- brundolf 3y agoLLVM does some optimizations, but compilers that target it normally do their own optimizations before generating the IR, because they know more than LLVM does about the higher-level source language and what can be done with it So eg, you may generate LLVM IR directly and only get LLVM's optimizations, or you may generate C and compile it with Clang and get Clang's optimizations + LLVM's optimizations You could always implement your own pre-LLVM optimizations in your LLVM IR generator, but as I think we all know, that's a huge amount of extra work (which is the OP's point)