Print out the variable declaration only if it is a declaration. Otherwise, a

'static' variable will be emitted twice.
PR10081


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137134 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/CBackend/CBackend.cpp

@@ -1817,7 +1817,7 @@ bool CWriter::doInitialization(Module &M) {
     Out << "\n\n/* Global Variable Declarations */\n";
     for (Module::global_iterator I = M.global_begin(), E = M.global_end();
          I != E; ++I)
-      if (!I->isDeclaration()) {
+      if (I->isDeclaration()) {
         // Ignore special globals, such as debug info.
         if (getGlobalVariableClass(I))
           continue;