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Summary: This instruction encodes a loading operation that may fault, and a label to branch to if the load page-faults. The locations of potentially faulting loads and their "handler" destinations are recorded in a FaultMap section, meant to be consumed by LLVM's clients. Nothing generates FAULTING_LOAD_OP instructions yet, but they will be used in a future change. The documentation (FaultMaps.rst) needs improvement and I will update this diff with a more expanded version shortly. Depends on D10196 Reviewers: rnk, reames, AndyAyers, ab, atrick, pgavlin Reviewed By: atrick, pgavlin Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D10197 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239740 91177308-0d34-0410-b5e6-96231b3b80d8