Update live-in lists when splitting critical edges.
Fixes PR10814. Patch by Jan Sjödin!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141960 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineBasicBlock.cpp b/lib/CodeGen/MachineBasicBlock.cpp
index 8f0fb46..4c5fe4c 100644
--- a/lib/CodeGen/MachineBasicBlock.cpp
+++ b/lib/CodeGen/MachineBasicBlock.cpp
@@ -571,6 +571,11 @@
if (i->getOperand(ni+1).getMBB() == this)
i->getOperand(ni+1).setMBB(NMBB);
+ // Inherit live-ins from the successor
+ for (MachineBasicBlock::livein_iterator I = Succ->livein_begin(),
+ E = Succ->livein_end(); I != E; ++I)
+ NMBB->addLiveIn(*I);
+
// Update LiveVariables.
if (LV) {
// Restore kills of virtual registers that were killed by the terminators.