[llvm] AMDGPU: Treat SWMMAC the same as MFMA and other WMMA for sched_barrier (PR #85721)

[Changpeng Fang via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=amdgcn -mcpu=gfx1200 -verify-machineinstrs -misched-cluster=0 < %s | FileCheck -check-prefix=GCN %s
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changpeng wrote:

Actually I think this -verify-machineinstrs is needed. 
In llvmbot,  -DLLVM_ENABLE_EXPENSIVE_CHECKS=ON is specified, thus this may seems redundant.
However, in downstream branches, we may not have this cmake option,  -verify-machineinstrs may still help.
Any other reasons?

https://github.com/llvm/llvm-project/pull/85721