Add function live-ins to entry block live-in set.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34112 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 3b7fb6b58f..ae7a495bf4 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -3891,6 +3891,14 @@ bool SelectionDAGISel::runOnFunction(Function &Fn) {
   for (Function::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I)
     SelectBasicBlock(I, MF, FuncInfo);
 
+  // Add function live-ins to entry block live-in set.
+  BasicBlock *EntryBB = &Fn.getEntryBlock();
+  BB = FuncInfo.MBBMap[EntryBB];
+  if (!MF.livein_empty())
+    for (MachineFunction::livein_iterator I = MF.livein_begin(),
+           E = MF.livein_end(); I != E; ++I)
+      BB->addLiveIn(I->first);
+
   return true;
 }