[all-commits] [llvm/llvm-project] c78640: [TailDuplicator] Fix merging block with terminator

[Sebastian Neubauer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c78640ee6a649af48745997253791d95de082eda
      https://github.com/llvm/llvm-project/commit/c78640ee6a649af48745997253791d95de082eda
  Author: Neubauer, Sebastian <Sebastian.Neubauer at amd.com>
  Date:   2021-10-29 (Fri, 29 Oct 2021)

  Changed paths:
    M llvm/lib/CodeGen/TailDuplicator.cpp
    A llvm/test/CodeGen/AMDGPU/early-tailduplicator-terminator.mir

  Log Message:
  -----------
  [TailDuplicator] Fix merging block with terminator

The TailDuplicator merged two blocks, even if the first one ended with
a terminator, resulting in invalid MIR, where a terminator is in the
middle of a block.

Abort merging if the first block ends with a terminator.

Differential Revision: https://reviews.llvm.org/D112226