[llvm] [AMDGPU] Analyze REG_SEQUENCE To Remove Redundant CMP Instructions (PR #167364)

[via llvm-commits]

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@@ -1312,6 +1312,30 @@ Register SIInstrInfo::insertNE(MachineBasicBlock *MBB,
   return Reg;
 }
 
+MachineInstr *
+SIInstrInfo::pierceThroughRegSequence(const MachineInstr &MI) const {
+  if (MI.getOpcode() != AMDGPU::REG_SEQUENCE)
+    return nullptr;
+
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LU-JOHN wrote:

Check if MI has wrong number of operands.

https://github.com/llvm/llvm-project/pull/167364