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2014 May 01
3
[LLVMdev] Adding an intrinsic that requires a constant parameter
My understanding of intrinsics in LLVM is that an optimization pass cannot
touch an intrinsic unless it (1) is specifically programmed to have
knowledge of the intrinsic, or (2) uses only declared properties of the
intrinsic, like IntrNoMem. So, for example, a pass may move an unknown
intrinsic around memory ops if its defined IntrNoMem, but it cannot hoist
constants for arbitrary intrinsics. Is