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TODO comment
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165605 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -109,6 +109,9 @@ public:
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int getReadAdvanceCycles(const MCSchedClassDesc *SC, unsigned UseIdx,
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unsigned WriteResID) const {
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// TODO: The number of read advance entries in a class can be significant
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// (~50). Consider compressing the WriteID into a dense ID of those that are
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// used by ReadAdvance and representing them as a bitset.
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for (const MCReadAdvanceEntry *I = &ReadAdvanceTable[SC->ReadAdvanceIdx],
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*E = I + SC->NumReadAdvanceEntries; I != E; ++I) {
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if (I->UseIdx < UseIdx)
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