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

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 3b7fb6b58f619a1ec4b1859424035b59df9b453c..ae7a495bf48665b2e89c5d54fe3c702b7aa7ae63 100644 (file)
--- 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;
 }