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[MachineLICM] Let targets decide if copy-like instructions are cheap #146599

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[MachineLICM] Let targets decide if copy-like instructions are cheap #146599

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2 changes: 1 addition & 1 deletion llvm/lib/CodeGen/MachineLICM.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1219,7 +1219,7 @@ bool MachineLICMImpl::HasHighOperandLatency(MachineInstr &MI, unsigned DefIdx,
/// Return true if the instruction is marked "cheap" or the operand latency
/// between its def and a use is one or less.
bool MachineLICMImpl::IsCheapInstruction(MachineInstr &MI) const {
if (TII->isAsCheapAsAMove(MI) || MI.isCopyLike())
if (TII->isAsCheapAsAMove(MI) || MI.isSubregToReg())
return true;

bool isCheap = false;
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