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Kill info update bugs.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41064 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-08-14 01:56:58 +00:00
parent ada054a9ea
commit 430a7b0c94
2 changed files with 3 additions and 2 deletions
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3
lib/CodeGen/LiveInterval.cpp
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@ -109,6 +109,7 @@ bool LiveInterval::overlapsFrom(const LiveInterval& other,
void LiveInterval::extendIntervalEndTo(Ranges::iterator I, unsigned NewEnd) {
assert(I != ranges.end() && "Not a valid interval!");
unsigned ValId = I->ValId;
unsigned OldEnd = I->end;
// Search for the first interval that we can't merge with.
Ranges::iterator MergeTo = next(I);
@ -123,7 +124,7 @@ void LiveInterval::extendIntervalEndTo(Ranges::iterator I, unsigned NewEnd) {
ranges.erase(next(I), MergeTo);
// Update kill info.
removeKillForValNum(ValId, I->start, I->end-1);
removeKillForValNum(ValId, OldEnd, I->end-1);
// If the newly formed range now touches the range after it and if they have
// the same value number, merge the two ranges into one range.

2
lib/CodeGen/SimpleRegisterCoalescing.cpp
View File

@ -559,8 +559,8 @@ bool SimpleRegisterCoalescing::SimpleJoin(LiveInterval &LHS, LiveInterval &RHS)
// Okay, the final step is to loop over the RHS live intervals, adding them to
// the LHS.
LHS.MergeRangesInAsValue(RHS, LHSValNo);
LHS.addKillsForValNum(LHSValNo, VNI.kills);
LHS.MergeRangesInAsValue(RHS, LHSValNo);
LHS.weight += RHS.weight;
if (RHS.preference && !LHS.preference)
LHS.preference = RHS.preference;