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It's possible to commute instrctions with more than 3 operands.

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llvm-svn: 43256
This commit is contained in:
Evan Cheng 2007-10-23 20:14:40 +00:00
parent 2cf65be2c4
commit 5391d0a39d
1 changed files with 1 additions and 1 deletions
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2
lib/CodeGen/TwoAddressInstructionPass.cpp
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@ -143,7 +143,7 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
// so, swap the B and C operands. This makes the live ranges of A
// and C joinable.
// FIXME: This code also works for A := B op C instructions.
if ((TID->Flags & M_COMMUTABLE) && mi->getNumOperands() == 3) {
if ((TID->Flags & M_COMMUTABLE) && mi->getNumOperands() >= 3) {
assert(mi->getOperand(3-si).isRegister() &&
"Not a proper commutative instruction!");
unsigned regC = mi->getOperand(3-si).getReg();