[llvm] [SimplifyCFG][Migrated] Transform for redirecting phis between unmergeable BB and SuccBB (PR #67275)

[Omair Javaid via llvm-commits]

omjavaid wrote:

I am not 100% sure how it seems to crash clang during compilation of llvm/flang/lib/Evaluate/intrinsics-library.cpp . Could you please post the issue https://github.com/llvm/llvm-project/blob/main/flang/docs/GettingInvolved.md#chat

The following error messages could be a starting point.

Not a vector MVT!
UNREACHABLE executed at ../llvm/llvm/include/llvm/CodeGen/MachineValueType.h:276!

The error  suggests that somewhere code that’s being compiled, an operation is expecting a vector Machine Value Type but is receiving a non-vector type instead. Bit I am not an expert in this area to explain further.

https://github.com/llvm/llvm-project/pull/67275