[SCEV] Remove undef check for SCEVConstant (NFC)

The value stored in SCEVConstant is of type ConstantInt*, which can
never be UndefValue. So we should never hit that code.

Reviewers: mkazantsev, sanjoy

Reviewed By: sanjoy

Differential Revision: https://reviews.llvm.org/D58851

llvm-svn: 355257

1 files changed, 0 insertions, 2 deletions

diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index cca425bf550..290e87a1f0f 100644
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -10824,8 +10824,6 @@ static inline bool containsUndefs(const SCEV *S) {
   return SCEVExprContains(S, [](const SCEV *S) {
     if (const auto *SU = dyn_cast<SCEVUnknown>(S))
       return isa<UndefValue>(SU->getValue());
-    else if (const auto *SC = dyn_cast<SCEVConstant>(S))
-      return isa<UndefValue>(SC->getValue());
     return false;
   });
 }