[llvm-reduce] Fix a warning

This patch fixes:

  llvm/tools/llvm-reduce/deltas/ReduceOpcodes.cpp:96:21: warning:
  unused variable ‘Op’ [-Wunused-variable]

diff --git a/llvm/tools/llvm-reduce/deltas/ReduceOpcodes.cpp b/llvm/tools/llvm-reduce/deltas/ReduceOpcodes.cpp
index a834034..327125b 100644 (file)
--- a/llvm/tools/llvm-reduce/deltas/ReduceOpcodes.cpp
+++ b/llvm/tools/llvm-reduce/deltas/ReduceOpcodes.cpp
@@ -93,7 +93,7 @@ static void replaceOpcodesInModule(Oracle &O, Module &Mod) {
         Instruction *Replacement =
             dyn_cast_or_null<Instruction>(reduceInstruction(Mod, I));
         if (Replacement && Replacement != &I) {
-          if (auto *Op = dyn_cast<FPMathOperator>(Replacement))
+          if (isa<FPMathOperator>(Replacement))
             Replacement->copyFastMathFlags(&I);
 
           Replacement->copyIRFlags(&I);