The last use in a block that doesn't have successors
(return or unreachable) is a kill.
llvm-svn: 67357
diff --git a/llvm/lib/Analysis/LiveValues.cpp b/llvm/lib/Analysis/LiveValues.cpp
index 2634463..21ddf6b 100644
--- a/llvm/lib/Analysis/LiveValues.cpp
+++ b/llvm/lib/Analysis/LiveValues.cpp
@@ -131,6 +131,11 @@
// Note the block in which this use occurs.
M.Used.insert(UseBB);
+ // If the use block doesn't have successors, the value can be
+ // considered killed.
+ if (succ_begin(UseBB) == succ_end(UseBB))
+ M.Killed.insert(UseBB);
+
// Observe whether the value is used outside of the loop in which
// it is defined. Switch to an enclosing loop if necessary.
for (; L; L = L->getParentLoop())