[Codegen] TargetLowering::getCanonicalIndexType - early out scaled MVT::i8 indices. NFCI.

Avoids unused assignment scan-build warning.

Author: RKSimon

llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

@@ -7956,10 +7956,8 @@ TargetLowering::getCanonicalIndexType(ISD::MemIndexType IndexType, EVT MemVT,
       (IndexType == ISD::SIGNED_SCALED) || (IndexType == ISD::SIGNED_UNSCALED);
 
   // Scaling is unimportant for bytes, canonicalize to unscaled.
-  if (IsScaledIndex && MemVT.getScalarType() == MVT::i8) {
-    IsScaledIndex = false;
-    IndexType = IsSignedIndex ? ISD::SIGNED_UNSCALED : ISD::UNSIGNED_UNSCALED;
-  }
+  if (IsScaledIndex && MemVT.getScalarType() == MVT::i8)
+    return IsSignedIndex ? ISD::SIGNED_UNSCALED : ISD::UNSIGNED_UNSCALED;
 
   return IndexType;
 }