[PATCH] D109714: Reduce maximum width of _ExtInt from 2^24-1 to 2^23 to workaround SelectionDAG issue.

[Craig Topper via Phabricator via cfe-commits]

craig.topper created this revision.
craig.topper added reviewers: aaron.ballman, erichkeane.
craig.topper requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

SelectionDAG type legalization requires a power of 2 type with at
least as many bits as the _ExtInt. This power of 2 type size must
fit in 24 bits since an llvm::IntegerType will be created. This
places an effective limit of 2^23 on any integer types if they go
through SelectionDAG.

Fixes part of PR51829.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D109714

Files:
  clang/docs/ReleaseNotes.rst
  clang/lib/Sema/SemaType.cpp
  clang/test/CodeGen/ext-int.c
  clang/test/CodeGenCXX/ext-int.cpp
  clang/test/SemaCXX/ext-int.cpp

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