[PATCH] D137706: [clang][Interp] Implement IntegralToPointer casts

[Timm Bäder via Phabricator via cfe-commits]

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The pointers created through such a cast are not usable in a constant expression as far as I know, but we need to be able to express them. Do that via  a `Pointer` with a `nullptr` pointee and an `Offset` that is the given integer.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D137706

Files:
  clang/lib/AST/Interp/ByteCodeExprGen.cpp
  clang/lib/AST/Interp/Interp.h
  clang/lib/AST/Interp/Opcodes.td
  clang/lib/AST/Interp/Pointer.cpp
  clang/lib/AST/Interp/Pointer.h
  clang/test/Sema/const-eval-64.c

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