[Analysis] Use isa instead of dyn_cast to suppress an unused variable warning. NFC

diff --git a/llvm/lib/Analysis/GlobalsModRef.cpp b/llvm/lib/Analysis/GlobalsModRef.cpp
index fcda674..c218b3d 100644 (file)
--- a/llvm/lib/Analysis/GlobalsModRef.cpp
+++ b/llvm/lib/Analysis/GlobalsModRef.cpp
@@ -592,7 +592,7 @@ void GlobalsAAResult::AnalyzeCallGraph(CallGraph &CG, Module &M) {
 
         // We handle calls specially because the graph-relevant aspects are
         // handled above.
-        if (auto *Call = dyn_cast<CallBase>(&I))
+        if (isa<CallBase>(&I))
           continue;
 
         // All non-call instructions we use the primary predicates for whether