[llvm] [SLP] Make getSameOpcode support interchangeable instructions. (PR #133888)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

> I can still reproduce this at main (as of a couple minutes ago). You need `-stdlib=libc++ -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG` as CXXFLAGS. Locally I have libc++ 19 installed.

Hope f427890a1dcd7759240568f189df8fbbcf23669c will fix it

https://github.com/llvm/llvm-project/pull/133888