Increment use count of new virtuals created during PHI elimination.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36233 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp
index 734a06fa9d212ff8f58c0364c228fb33a8c49c12..513bfdeb256b6282b25814d1b86f289cb7451089 100644 (file)
--- a/lib/CodeGen/PHIElimination.cpp
+++ b/lib/CodeGen/PHIElimination.cpp
@@ -138,6 +138,9 @@ void PNE::LowerAtomicPHINode(MachineBasicBlock &MBB,
   if (LV) {
     MachineInstr *PHICopy = prior(AfterPHIsIt);
 
+    // Increment use count of the newly created virtual register.
+    LV->getVarInfo(IncomingReg).NumUses++;
+
     // Add information to LiveVariables to know that the incoming value is
     // killed.  Note that because the value is defined in several places (once
     // each for each incoming block), the "def" block and instruction fields