[all-commits] [llvm/llvm-project] e1e3b6: [M68k] Avoid UB in disassembler

[Ricky Taylor via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e1e3b6ee72977c584052a9da8735c31c2a17385a
      https://github.com/llvm/llvm-project/commit/e1e3b6ee72977c584052a9da8735c31c2a17385a
  Author: Ricky Taylor <rickytaylor26 at gmail.com>
  Date:   2021-09-29 (Wed, 29 Sep 2021)

  Changed paths:
    M llvm/lib/Target/M68k/Disassembler/M68kDisassembler.cpp

  Log Message:
  -----------
  [M68k] Avoid UB in disassembler

When reading 32 bits a 32-bit shift would be executed.

This is undefined behaviour, but in this case we can just replace the
entire scratch value to avoid it.

Differential Revision: https://reviews.llvm.org/D110769