[PATCH] D125556: [APInt] Allow extending and truncating to the same width

[Jay Foad via Phabricator via llvm-commits]

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Allow zext, sext, trunc, truncUSat and truncSSat to extend or truncate
to the same bit width, which is a no-op.

Disallowing this forced clients to use workarounds like using
zextOrTrunc (even though they never wanted truncation) or zextOrSelf
(even though they did not want its strange behaviour of allowing a
*smaller* bit width, which is also treated as a no-op).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D125556

Files:
  llvm/include/llvm/ADT/APInt.h
  llvm/lib/Support/APInt.cpp
  llvm/unittests/ADT/APIntTest.cpp

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