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...ts by the backends which know their target. If you are writing an LLVM pass and you absolutely NEED to know the numeric size of a struct, you must use the TargetData object which is target-specific. If you want to get the numeric size of a struct without using the LLVM API, it will require you to eesentially reimplement TargetData yourself in your programming language of choice. However, it does not change the fact that LLVM is and continues to be an abstraction of target machines. What do you mean by "build-time-dependent frontends"? Frontends can be completely separate from the LLVM...

Reid Spencer wrote: > Its certainly possible to generate .ll files but its probably about the > same amount of work to use the LLVM API and there are significant speed > and validity benefits to doing so. Does this mean that LLVM is moving away from the idea of a truly abstract IR language, to being a set of development libraries for use by build-time-dependent frontends?