llvm: enable the backend even when not linked to llvm #16747
Merged
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With these changes, it is now possible to compile the llvm backend even without llvm linked. There is a lot of work to make this generally useful, but it is already capable of performing
-fno-libllvm -fno-emit-bin -fstrip --verbose-llvm-ir=output.ll
without any external help. Compiling the behavior tests to an ll file and then using llvm to finish the compilation separately produces a binary that passes all tests.