Split DAE::MarkLive into MarkLive and PropagateLiveness.
llvm-svn: 53600
diff --git a/llvm/lib/Transforms/IPO/DeadArgumentElimination.cpp b/llvm/lib/Transforms/IPO/DeadArgumentElimination.cpp
index d2a5f28..11c083b 100644
--- a/llvm/lib/Transforms/IPO/DeadArgumentElimination.cpp
+++ b/llvm/lib/Transforms/IPO/DeadArgumentElimination.cpp
@@ -134,6 +134,7 @@
const UseVector &MaybeLiveUses);
void MarkLive(const RetOrArg &RA);
void MarkLive(const Function &F);
+ void PropagateLiveness(const RetOrArg &RA);
bool RemoveDeadStuffFromFunction(Function *F);
bool DeleteDeadVarargs(Function &Fn);
};
@@ -545,7 +546,12 @@
return; // We were already marked Live.
DOUT << "DAE - Marking " << RA.getDescription() << " live\n";
+ PropagateLiveness(RA);
+}
+/// PropagateLiveness - Given that RA is a live value, propagate it's liveness
+/// to any other values it uses (according to Uses).
+void DAE::PropagateLiveness(const RetOrArg &RA) {
// We don't use upper_bound (or equal_range) here, because our recursive call
// to ourselves is likely to cause the upper_bound (which is the first value
// not belonging to RA) to become erased and the iterator invalidated.