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Diffstat (limited to 'lib/CodeGen/MachineLICM.cpp')
| -rw-r--r-- | lib/CodeGen/MachineLICM.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineLICM.cpp b/lib/CodeGen/MachineLICM.cpp index 811c86c..e3b21c4 100644 --- a/lib/CodeGen/MachineLICM.cpp +++ b/lib/CodeGen/MachineLICM.cpp @@ -944,6 +944,8 @@ bool MachineLICM::IsProfitableToHoist(MachineInstr &MI) { // In low register pressure situation, we can be more aggressive about // hoisting. Also, favors hoisting long latency instructions even in // moderately high pressure situation. + // FIXME: If there are long latency loop-invariant instructions inside the + // loop at this point, why didn't the optimizer's LICM hoist them? DenseMap<unsigned, int> Cost; for (unsigned i = 0, e = MI.getDesc().getNumOperands(); i != e; ++i) { const MachineOperand &MO = MI.getOperand(i); |