HomePhabricator

[IR] Introduce the opaque pointer type

Authored by aeubanks on May 1 2021, 7:04 PM.

Description

[IR] Introduce the opaque pointer type

The opaque pointer type is essentially just a normal pointer type with a
null pointee type.

This also adds support for the opaque pointer type to the bitcode
reader/writer, as well as to textual IR.

To avoid confusion with existing pointer types, we disallow creating a
pointer to an opaque pointer.

Opaque pointer types should not be widely used at this point since many
parts of LLVM still do not support them. The next steps are to add some
very simple use cases of opaque pointers to make sure they work, then
start pretending that all pointers are opaque pointers and see what
breaks.

https://lists.llvm.org/pipermail/llvm-dev/2021-May/150359.html

Reviewed By: dblaikie, dexonsmith, pcc

Differential Revision: https://reviews.llvm.org/D101704

Details

Committed
aeubanksMay 13 2021, 3:22 PM
Reviewer
dblaikie
Differential Revision
D101704: [IR] Introduce the opaque pointer type
Parents
rG83ff0ff46337: [Clang][OpenMP] Allow unified_shared_memory for Pascal-generation GPUs.
Branches
Unknown
Tags
Unknown