Block level expr should be visited. Otherwise variables in init expr of
DeclStmt would be dead before the DeclStmt.
For example:
int x = 0;
int y = x;
'x' would be dead before 'int y = x'.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74522 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LiveVariables.cpp b/lib/Analysis/LiveVariables.cpp
index b0eb37b..b354566 100644
--- a/lib/Analysis/LiveVariables.cpp
+++ b/lib/Analysis/LiveVariables.cpp
@@ -135,9 +135,11 @@
StmtVisitor<TransferFuncs,void>::Visit(S);
}
- else
+ else {
// For block-level expressions, mark that they are live.
LiveState(S,AD) = Alive;
+ StmtVisitor<TransferFuncs,void>::Visit(S);
+ }
}
void TransferFuncs::VisitTerminator(CFGBlock* B) {