[ValueTracking] Make isImpliedCondition return an Optional<bool>. NFC.

Phabricator Revision: http://reviews.llvm.org/D19277

llvm-svn: 266904

1 files changed, 5 insertions, 4 deletions

diff --git a/llvm/lib/Transforms/Scalar/JumpThreading.cpp b/llvm/lib/Transforms/Scalar/JumpThreading.cpp
index d68dd140a80..7495baab1d9 100644
--- a/llvm/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/llvm/lib/Transforms/Scalar/JumpThreading.cpp
@@ -928,10 +928,11 @@ bool JumpThreading::ProcessImpliedCondition(BasicBlock *BB) {
     if (!PBI || !PBI->isConditional() || PBI->getSuccessor(0) != CurrentBB)
       return false;
 
-    bool ImpliedTrue;
-    if (isImpliedCondition(PBI->getCondition(), Cond, ImpliedTrue, DL)) {
-      BI->getSuccessor(ImpliedTrue ? 1 : 0)->removePredecessor(BB);
-      BranchInst::Create(BI->getSuccessor(ImpliedTrue ? 0 : 1), BI);
+    Optional<bool> Implication =
+        isImpliedCondition(PBI->getCondition(), Cond, DL);
+    if (Implication) {
+      BI->getSuccessor(*Implication ? 1 : 0)->removePredecessor(BB);
+      BranchInst::Create(BI->getSuccessor(*Implication ? 0 : 1), BI);
       BI->eraseFromParent();
       return true;
     }