[all-commits] [llvm/llvm-project] 08e9c4: SwiftCallingConv: Fix the splitVectorEntry functio...

[Arnold Schwaighofer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 08e9c462eaa900449c2250c7ae84d9d303de9fb4
      https://github.com/llvm/llvm-project/commit/08e9c462eaa900449c2250c7ae84d9d303de9fb4
  Author: Arnold Schwaighofer <aschwaighofer at apple.com>
  Date:   2023-10-27 (Fri, 27 Oct 2023)

  Changed paths:
    M clang/lib/CodeGen/SwiftCallingConv.cpp
    M clang/test/CodeGen/64bit-swiftcall.c

  Log Message:
  -----------
  SwiftCallingConv: Fix the splitVectorEntry function (#69953)

When splitting an entry into multiple entries, the indices of the split
entries are a combination of the original split entry's and the number
of elements we split that entry to.

Failure to do so resulted in non-sensical entries leading e.g to
assertion failures in `getCoerceAndExpandTypes` and runtime failures in
Swift programs.