Added #include <alloca.h>

llvm-svn: 3491

llvm/lib/CodeGen/InstrSelection/InstrForest.cpp

@@ -21,6 +21,7 @@
 #include "llvm/Type.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "Support/STLExtras.h"
+#include <alloca.h>
 using std::cerr;
 using std::vector;