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TODO comment

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165605 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2012-10-10 05:43:16 +00:00
parent dbe6d43dfa
commit 85c7b6108f
1 changed files with 3 additions and 0 deletions
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3
include/llvm/MC/MCSubtargetInfo.h
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@ -109,6 +109,9 @@ public:
int getReadAdvanceCycles(const MCSchedClassDesc *SC, unsigned UseIdx,
unsigned WriteResID) const {
// TODO: The number of read advance entries in a class can be significant
// (~50). Consider compressing the WriteID into a dense ID of those that are
// used by ReadAdvance and representing them as a bitset.
for (const MCReadAdvanceEntry *I = &ReadAdvanceTable[SC->ReadAdvanceIdx],
*E = I + SC->NumReadAdvanceEntries; I != E; ++I) {
if (I->UseIdx < UseIdx)