Teach MachineLICM and MachineSink how to clear kill flags conservatively
when they move instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103737 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp
index ef489dc..1610e6c 100644
--- a/lib/CodeGen/MachineSink.cpp
+++ b/lib/CodeGen/MachineSink.cpp
@@ -314,5 +314,10 @@
// Move the instruction.
SuccToSinkTo->splice(InsertPos, ParentBlock, MI,
++MachineBasicBlock::iterator(MI));
+
+ // Conservatively, clear any kill flags, since it's possible that
+ // they are no longer correct.
+ MI->clearKillInfo();
+
return true;
}