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It's possible to commute instrctions with more than 3 operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43256 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -143,7 +143,7 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
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// so, swap the B and C operands. This makes the live ranges of A
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// and C joinable.
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// FIXME: This code also works for A := B op C instructions.
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if ((TID->Flags & M_COMMUTABLE) && mi->getNumOperands() == 3) {
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if ((TID->Flags & M_COMMUTABLE) && mi->getNumOperands() >= 3) {
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assert(mi->getOperand(3-si).isRegister() &&
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"Not a proper commutative instruction!");
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unsigned regC = mi->getOperand(3-si).getReg();
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