[llvm] [AMDGPU] Hoist s_set_vgpr_msb past SALU control instructions (PR #172108)

[Stanislav Mekhanoshin via llvm-commits]

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@@ -457,6 +457,12 @@ class SIInstrInfo final : public AMDGPUGenInstrInfo {
     return get(Opcode).TSFlags & SIInstrFlags::SALU;
   }
 
+  static bool isControlInstr(const MachineInstr &MI) {
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rampitec wrote:

It still has to be something else, not Control. IdempotentSALU?

https://github.com/llvm/llvm-project/pull/172108