Revert r91208. Something on Linux prevents the JIT from looking up a symbol

defined in the test, and I don't have time tonight to figure it out.

llvm-svn: 91209

lib/ExecutionEngine/JIT/JIT.cpp

@@ -681,7 +681,7 @@ void *JIT::getOrEmitGlobalVariable(const GlobalVariable *GV) {
   if (Ptr) return Ptr;
 
   // If the global is external, just remember the address.
-  if (GV->isDeclaration() || GV->hasAvailableExternallyLinkage()) {
+  if (GV->isDeclaration()) {
 #if HAVE___DSO_HANDLE
     if (GV->getName() == "__dso_handle")
       return (void*)&__dso_handle;

unittests/ExecutionEngine/JIT/JITTest.cpp

@@ -534,31 +534,6 @@ TEST_F(JITTest, FunctionPointersOutliveTheirCreator) {
 #endif
 }
 
-}  // anonymous namespace
-// This variable is intentionally defined differently in the statically-compiled
-// program from the IR input to the JIT to assert that the JIT doesn't use its
-// definition.
-extern "C" int32_t JITTest_AvailableExternallyGlobal;
-int32_t JITTest_AvailableExternallyGlobal = 42;
-namespace {
-
-TEST_F(JITTest, AvailableExternallyGlobalIsntEmitted) {
-  TheJIT->DisableLazyCompilation(true);
-  LoadAssembly("@JITTest_AvailableExternallyGlobal = "
-               "  available_externally global i32 7 "
-               " "
-               "define i32 @loader() { "
-               "  %result = load i32* @JITTest_AvailableExternallyGlobal "
-               "  ret i32 %result "
-               "} ");
-  Function *loaderIR = M->getFunction("loader");
-
-  int32_t (*loader)() = reinterpret_cast<int32_t(*)()>(
-    (intptr_t)TheJIT->getPointerToFunction(loaderIR));
-  EXPECT_EQ(42, loader()) << "func should return 42 from the external global,"
-                          << " not 7 from the IR version.";
-}
-
 // This code is copied from JITEventListenerTest, but it only runs once for all
 // the tests in this directory.  Everything seems fine, but that's strange
 // behavior.