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| -rw-r--r-- | lib/Analysis/LiveValues.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Analysis/LiveValues.cpp b/lib/Analysis/LiveValues.cpp index 2634463..21ddf6b 100644 --- a/lib/Analysis/LiveValues.cpp +++ b/lib/Analysis/LiveValues.cpp @@ -131,6 +131,11 @@ LiveValues::Memo &LiveValues::compute(const Value *V) { // 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()) |