Reduce dyn_cast<> to isa<> or cast<> where possible.

No functional change intended.

llvm-svn: 234586
diff --git a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
index 5e6dc89..662513d 100644
--- a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -308,7 +308,7 @@
     IRBuilder<> IRB(I);
     CallSite CS(I);
     Value *Callee = CS.getCalledValue();
-    if (dyn_cast<InlineAsm>(Callee)) continue;
+    if (isa<InlineAsm>(Callee)) continue;
     GlobalVariable *CalleeCache = new GlobalVariable(
         *F.getParent(), Ty, false, GlobalValue::PrivateLinkage,
         Constant::getNullValue(Ty), "__sancov_gen_callee_cache");