[PATCH] D51693: ADT: add <bit> header, implement C++20 bit_cast, use

[JF Bastien via Phabricator via llvm-commits]

jfb created this revision.
Herald added a reviewer: javed.absar.
Herald added subscribers: llvm-commits, dexonsmith.

I saw a few places that were punning through a union of FP and integer, and that made me sad. Luckily, C++20 adds bit_cast for exactly that purpose. Implement our own version in ADT (without constexpr, leaving us a bit sad), and use it in the few places my grep-fu found silly union punning.


Repository:
  rL LLVM

https://reviews.llvm.org/D51693

Files:
  include/llvm/ADT/bit.h
  lib/Support/APInt.cpp
  lib/Target/AArch64/MCTargetDesc/AArch64AddressingModes.h
  lib/Target/ARM/MCTargetDesc/ARMAddressingModes.h

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