[PATCH] D61524: [BPF] Support for compile once and run everywhere

[Arthur Eubanks via Phabricator via llvm-commits]

aeubanks added a comment.

The opaque pointers project (https://llvm.org/docs/OpaquePointers.html) is trying to remove pointee types from pointer types. For example, the GEP instruction doesn't look at the base pointer's type, but rather the type is separately encoded into the instruction (https://llvm.org/docs/LangRef.html#getelementptr-instruction).
In terms of code changes, this means that all calls to `Type::getPointerElementType()` won't work. BPFAbstractMemberAccess.cpp uses that to see what type to operate on for these added intrinsics. Basically it's emulating the old GEP instruction which did indeed look at the base pointer's pointee type. But that won't work at some point.

As for overloaded intrinsic types, see https://llvm.org/docs/LangRef.html#intrinsic-functions.


Repository:
  rL LLVM

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https://reviews.llvm.org/D61524