Dead code elimination may separate the live interval into multiple connected components.
I have convinced myself that it can only happen when a phi value dies. When it
happens, allocate new virtual registers for the components.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127827 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index 6f7b972..ff00bd8 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -538,11 +538,11 @@
// Create the complement as index 0.
if (Edit->empty())
- Edit->create(MRI, LIS, VRM);
+ Edit->create(LIS, VRM);
// Create the open interval.
OpenIdx = Edit->size();
- Edit->create(MRI, LIS, VRM);
+ Edit->create(LIS, VRM);
}
SlotIndex SplitEditor::enterIntvBefore(SlotIndex Idx) {
@@ -802,7 +802,7 @@
if (Dead.empty())
return;
- Edit->eliminateDeadDefs(Dead, LIS, TII);
+ Edit->eliminateDeadDefs(Dead, LIS, VRM, TII);
}
void SplitEditor::finish() {
@@ -866,7 +866,7 @@
SmallVector<LiveInterval*, 8> dups;
dups.push_back(li);
for (unsigned i = 1; i != NumComp; ++i)
- dups.push_back(&Edit->create(MRI, LIS, VRM));
+ dups.push_back(&Edit->create(LIS, VRM));
ConEQ.Distribute(&dups[0], MRI);
}