[LoopUnroll] Fold variable only used in assert into the assert

Avoids warnings in Release builds. NFCI.

Author: d0k

llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp

@@ -3528,8 +3528,8 @@ static int32_t computeHeuristicUnrollFactor(CanonicalLoopInfo *CLI) {
     return 1;
   }
 
-  unsigned LoopSize = UCE.getRolledLoopSize();
-  LLVM_DEBUG(dbgs() << "Estimated loop size is " << LoopSize << "\n");
+  LLVM_DEBUG(dbgs() << "Estimated loop size is " << UCE.getRolledLoopSize()
+                    << "\n");
 
   // TODO: Determine trip count of \p CLI if constant, computeUnrollCount might
   // be able to use it.

llvm/lib/Transforms/Scalar/LoopUnrollAndJamPass.cpp

@@ -333,8 +333,8 @@ tryToUnrollAndJamLoop(Loop *L, DominatorTree &DT, LoopInfo *LI,
   }
 
   unsigned InnerLoopSize = InnerUCE.getRolledLoopSize();
-  unsigned OuterLoopSize = OuterUCE.getRolledLoopSize();
-  LLVM_DEBUG(dbgs() << "  Outer Loop Size: " << OuterLoopSize << "\n");
+  LLVM_DEBUG(dbgs() << "  Outer Loop Size: " << OuterUCE.getRolledLoopSize()
+                    << "\n");
   LLVM_DEBUG(dbgs() << "  Inner Loop Size: " << InnerLoopSize << "\n");
 
   if (InnerUCE.NumInlineCandidates != 0 || OuterUCE.NumInlineCandidates != 0) {