8fcb1263f4
This is to enable a transition of LoopIdiomRecognize to selecting the llvm.experimental.memset.pattern intrinsic as requested in #118632 (as opposed to supporting selection of the libcall or the intrinsic). As such, although it _is_ a TODO to add costing considerations on whether to lower to the libcall (when available) or expand directly, lacking such logic is helpful at this stage in order to minimise any unexpected code gen changes in this transition.
The LLVM Compiler Infrastructure
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