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There is no generic mechanism as far as I know. You can look at AsmPrinter.cpp/emitComments() to see what situations trigger comments at the moment. - Matthias > On Feb 3, 2018, at 4:40 AM, Martin J. O'Riordan via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > When I am constructing sequences of instructions during custom lowering, I would like to be able to also add a

When I am constructing sequences of instructions during custom lowering, I would like to be able to also add a comment that appears in the generated assembly with '-S -fverbose-asm'. There is a large set of 'add*' functions to attach additional information to the MI, but I don't see one for adding comments. Is there a method I can call to attach an arbitrary string