alloca.h doesn't exist on Windows.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42089 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Sema/SemaDecl.cpp b/Sema/SemaDecl.cpp
index 3985d51..d1ce0b4 100644
--- a/Sema/SemaDecl.cpp
+++ b/Sema/SemaDecl.cpp
@@ -22,8 +22,11 @@
#include "clang/Lex/IdentifierTable.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/TargetInfo.h"
+#include "llvm/Config/config.h"
#include "llvm/ADT/SmallSet.h"
+#if !defined(LLVM_ON_WIN32)
#include <alloca.h>
+#endif
using namespace clang;
Sema::DeclTy *Sema::isTypeName(const IdentifierInfo &II, Scope *S) const {