- /// Instruction that records the offset of a function's frame allocation in a
- /// label. Created by the llvm.frameallocate intrinsic. It has two arguments:
- /// the symbol for the label and the frame index of the stack allocation.
- FRAME_ALLOC = 21,
+ /// Instruction that records the offset of a local stack allocation passed to
+ /// llvm.localescape. It has two arguments: the symbol for the label and the
+ /// frame index of the local stack allocation.
+ LOCAL_ESCAPE = 21,
+
+ /// Loading instruction that may page fault, bundled with associated
+ /// information on how to handle such a page fault. It is intended to support
+ /// "zero cost" null checks in managed languages by allowing LLVM to fold
+ /// comparisons into existing memory operations.
+ FAULTING_LOAD_OP = 22,