[InstCombine] Remove an if that should have been guaranteed by the caller. Replace with an assert. NFC

llvm-svn: 306997

1 files changed, 2 insertions, 4 deletions

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
index 53f61d6a9c7..cb3f3214e99 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -80,16 +80,14 @@ static Value *getFCmpValue(unsigned Code, Value *LHS, Value *RHS,
 /// \return Pointer to node that must replace the original binary operator, or
 ///         null pointer if no transformation was made.
 Value *InstCombiner::SimplifyBSwap(BinaryOperator &I) {
+  assert(I.isBitwiseLogicOp() && "Unexpected opcode for bswap simplifying");
+
   IntegerType *ITy = dyn_cast<IntegerType>(I.getType());
 
   // Can't do vectors.
   if (I.getType()->isVectorTy())
     return nullptr;
 
-  // Can only do bitwise ops.
-  if (!I.isBitwiseLogicOp())
-    return nullptr;
-
   Value *OldLHS = I.getOperand(0);
   Value *OldRHS = I.getOperand(1);
   ConstantInt *ConstLHS = dyn_cast<ConstantInt>(OldLHS);