[FunctionImport] Prefer isa<> to dyn_cast<> as the value is not used.

This change makes GCC7 happy again.

llvm-svn: 309305

diff --git a/llvm/lib/Transforms/IPO/FunctionImport.cpp b/llvm/lib/Transforms/IPO/FunctionImport.cpp
index a36314c..de3756e 100644 (file)
--- a/llvm/lib/Transforms/IPO/FunctionImport.cpp
+++ b/llvm/lib/Transforms/IPO/FunctionImport.cpp
@@ -132,7 +132,7 @@ selectCallee(const ModuleSummaryIndex &Index,
         if (GlobalValue::isInterposableLinkage(GVSummary->linkage()))
           // There is no point in importing these, we can't inline them
           return false;
-        if (auto *AS = dyn_cast<AliasSummary>(GVSummary))
+        if (isa<AliasSummary>(GVSummary))
           // Aliases can't point to "available_externally".
           // FIXME: we should import alias as available_externally *function*,
           // the destination module does not need to know it is an alias.