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Update comments to reflect some (not so) recent changes.

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llvm-svn: 139498
This commit is contained in:
Jakob Stoklund Olesen 2011-09-12 16:03:26 +00:00
parent 962b1ca071
commit fed2345086
1 changed files with 5 additions and 4 deletions
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9
lib/CodeGen/SplitKit.h
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@ -255,7 +255,7 @@ class SplitEditor {
// live-out value and its defining block.
// One of these conditions shall be true:
//
// 1. !LiveOutCache.count(MBB)
// 1. !LiveOutSeen.count(MBB->getNumber())
// 2. LiveOutCache[MBB].second.getNode() == MBB
// 3. forall P in preds(MBB): LiveOutCache[P] == LiveOutCache[MBB]
//
@ -264,12 +264,13 @@ class SplitEditor {
// VNI = Edit.get(RegIdx)->getVNInfoAt(LIS.getMBBEndIdx(MBB))
// Node = mbt_[LIS.getMBBFromIndex(VNI->def)]
//
// The cache is also used as a visited set by extendRange(). It can be shared
// by all the new registers because at most one is live out of each block.
// The cache can be shared by all the new registers because at most one is
// live out of each block.
LiveOutMap LiveOutCache;
// LiveOutSeen - Indexed by MBB->getNumber(), a bit is set for each valid
// entry in LiveOutCache.
// entry in LiveOutCache. This is also used as a visited set for
// findReachingDefs().
BitVector LiveOutSeen;
/// LiveInBlock - Info for updateSSA() about a block where a register is