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Switch extendInBlock() to take a kill slot instead of the last use slot.

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Three out of four clients prefer this interface which is consistent with
extendIntervalEndTo() and LiveRangeCalc::extend().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139604 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-09-13 16:47:56 +00:00
parent c1c622ef0d
commit ee5655dca4
5 changed files with 17 additions and 20 deletions
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14
lib/CodeGen/LiveInterval.cpp
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@@ -294,20 +294,20 @@ LiveInterval::addRangeFrom(LiveRange LR, iterator From) {
return ranges.insert(it, LR);
}
/// extendInBlock - If this interval is live before UseIdx in the basic
/// block that starts at StartIdx, extend it to be live at UseIdx and return
/// the value. If there is no live range before UseIdx, return NULL.
VNInfo *LiveInterval::extendInBlock(SlotIndex StartIdx, SlotIndex UseIdx) {
/// extendInBlock - If this interval is live before Kill in the basic
/// block that starts at StartIdx, extend it to be live up to Kill and return
/// the value. If there is no live range before Kill, return NULL.
VNInfo *LiveInterval::extendInBlock(SlotIndex StartIdx, SlotIndex Kill) {
if (empty())
return 0;
iterator I = std::upper_bound(begin(), end(), UseIdx);
iterator I = std::upper_bound(begin(), end(), Kill.getPrevSlot());
if (I == begin())
return 0;
--I;
if (I->end <= StartIdx)
return 0;
if (I->end <= UseIdx)
extendIntervalEndTo(I, UseIdx.getNextSlot());
if (I->end < Kill)
extendIntervalEndTo(I, Kill);
return I->valno;
}