Find anchoring end points for repairIntervalsInRange and repairIndexesInRange
automatically.
llvm-svn: 175673
diff --git a/llvm/lib/CodeGen/SlotIndexes.cpp b/llvm/lib/CodeGen/SlotIndexes.cpp
index b4e562e..f293794 100644
--- a/llvm/lib/CodeGen/SlotIndexes.cpp
+++ b/llvm/lib/CodeGen/SlotIndexes.cpp
@@ -146,6 +146,15 @@
void SlotIndexes::repairIndexesInRange(MachineBasicBlock *MBB,
MachineBasicBlock::iterator Begin,
MachineBasicBlock::iterator End) {
+ // FIXME: Is this really necessary? The only caller repairIntervalsForRange()
+ // does the same thing.
+ // Find anchor points, which are at the beginning/end of blocks or at
+ // instructions that already have indexes.
+ while (Begin != MBB->begin() && !hasIndex(Begin))
+ --Begin;
+ while (End != MBB->end() && !hasIndex(End))
+ ++End;
+
bool includeStart = (Begin == MBB->begin());
SlotIndex startIdx;
if (includeStart)