Kill info update bugs.

llvm-svn: 41064

2 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/LiveInterval.cpp b/llvm/lib/CodeGen/LiveInterval.cpp
index d60c3b1..9697d43b 100644
--- a/llvm/lib/CodeGen/LiveInterval.cpp
+++ b/llvm/lib/CodeGen/LiveInterval.cpp
@@ -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.
diff --git a/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp b/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
index fef2fde..fc88ffe 100644
--- a/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
+++ b/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
@@ -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;