Ignore debug value instructions while analyzing BB for tail duplication.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98675 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/TailDuplication.cpp b/lib/CodeGen/TailDuplication.cpp
index fa3785dc0795f9a989cb1825b49cdf410925ead8..aa6e2b4e87e34b8fb845d51f2ea455a20d9c5553 100644 (file)
--- a/lib/CodeGen/TailDuplication.cpp
+++ b/lib/CodeGen/TailDuplication.cpp
@@ -495,7 +495,7 @@ TailDuplicatePass::TailDuplicate(MachineBasicBlock *TailBB, MachineFunction &MF,
     if (InstrCount == MaxDuplicateCount) return false;
     // Remember if we saw a call.
     if (I->getDesc().isCall()) HasCall = true;
-    if (!I->isPHI())
+    if (!I->isPHI() && !I->isDebugValue())
       InstrCount += 1;
   }
   // Heuristically, don't tail-duplicate calls if it would expand code size,