Alternative fix for problem addressed in r182233

Revision r182233 partially reverted the change in r181200 to simplify
JIT unif test #ifdefs, because that change caused a link error on some
host operating systems where the export list requires the following
symbols to be defined:

 JITTest_AvailableExternallyFunction
 JITTest_AvailableExternallyGlobal

As discussed on the list, the commit reverts r182233 (and re-installs
the full r181200 change), and instead fixes the link problem by moving
those two symbols to the top of the file and unconditionally defining
them.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182367 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 19 insertions, 42 deletions

diff --git a/unittests/ExecutionEngine/JIT/JITTest.cpp b/unittests/ExecutionEngine/JIT/JITTest.cpp
index 18063d12ab..3b94d76d76 100644
--- a/unittests/ExecutionEngine/JIT/JITTest.cpp
+++ b/unittests/ExecutionEngine/JIT/JITTest.cpp
@@ -33,10 +33,26 @@
 
 using namespace llvm;
 
+// 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.  Note that this variable must be defined even on platforms where
+// JIT tests are disabled as it is referenced from the .def file.
+extern "C" int32_t JITTest_AvailableExternallyGlobal;
+int32_t JITTest_AvailableExternallyGlobal LLVM_ATTRIBUTE_USED = 42;
+
+// This function 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.  Note that this function must be defined even on platforms where
+// JIT tests are disabled as it is referenced from the .def file.
+extern "C" int32_t JITTest_AvailableExternallyFunction() LLVM_ATTRIBUTE_USED;
+extern "C" int32_t JITTest_AvailableExternallyFunction() {
+  return 42;
+}
+
 namespace {
 
-// Tests on PowerPC and SystemZ disabled as we're running the old jit
-#if !defined(__powerpc__) && !defined(__s390__)
+// Tests on ARM, PowerPC and SystemZ disabled as we're running the old jit
+#if !defined(__arm__) && !defined(__powerpc__) && !defined(__s390__)
 
 Function *makeReturnGlobal(std::string Name, GlobalVariable *G, Module *M) {
   std::vector<Type*> params;
@@ -185,9 +201,6 @@ class JITTest : public testing::Test {
   OwningPtr<ExecutionEngine> TheJIT;
 };
 
-// Tests on ARM disabled as we're running the old jit
-#if !defined(__arm__)
-
 // Regression test for a bug.  The JIT used to allocate globals inside the same
 // memory block used for the function, and when the function code was freed,
 // the global was left in the same place.  This test allocates a function
@@ -256,11 +269,6 @@ TEST(JIT, GlobalInFunction) {
   EXPECT_EQ(3, *GPtr);
 }
 
-#endif // !defined(__arm__)
-
-// ARM tests disabled pending fix for PR10783.
-#if !defined(__arm__)
-
 int PlusOne(int arg) {
   return arg + 1;
 }
@@ -421,7 +429,6 @@ TEST_F(JITTest, ModuleDeletion) {
   EXPECT_EQ(RJMM->startFunctionBodyCalls.size(),
             RJMM->deallocateFunctionBodyCalls.size());
 }
-#endif // !defined(__arm__)
 
 // ARM, MIPS and PPC still emit stubs for calls since the target may be
 // too far away to call directly.  This #if can probably be removed when
@@ -467,9 +474,6 @@ TEST_F(JITTest, NoStubs) {
 }
 #endif  // !ARM && !PPC
 
-// Tests on ARM disabled as we're running the old jit
-#if !defined(__arm__)
-
 TEST_F(JITTest, FunctionPointersOutliveTheirCreator) {
   TheJIT->DisableLazyCompilation(true);
   LoadAssembly("define i8()* @get_foo_addr() { "
@@ -504,9 +508,6 @@ TEST_F(JITTest, FunctionPointersOutliveTheirCreator) {
 #endif
 }
 
-#endif //!defined(__arm__)
-
-// Tests on ARM disabled as we're running the old jit. In addition, 
 // ARM does not have an implementation of replaceMachineCodeForFunction(),
 // so recompileAndRelinkFunction doesn't work.
 #if !defined(__arm__)
@@ -542,17 +543,6 @@ TEST_F(JITTest, FunctionIsRecompiledAndRelinked) {
 }
 #endif  // !defined(__arm__)
 
-}  // 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 LLVM_ATTRIBUTE_USED = 42;
-namespace {
-
-// Tests on ARM disabled as we're running the old jit
-#if !defined(__arm__)
-
 TEST_F(JITTest, AvailableExternallyGlobalIsntEmitted) {
   TheJIT->DisableLazyCompilation(true);
   LoadAssembly("@JITTest_AvailableExternallyGlobal = "
@@ -569,19 +559,7 @@ TEST_F(JITTest, AvailableExternallyGlobalIsntEmitted) {
   EXPECT_EQ(42, loader()) << "func should return 42 from the external global,"
                           << " not 7 from the IR version.";
 }
-#endif //!defined(__arm__)
-}  // anonymous namespace
-// This function 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_AvailableExternallyFunction() LLVM_ATTRIBUTE_USED;
-extern "C" int32_t JITTest_AvailableExternallyFunction() {
-  return 42;
-}
-namespace {
 
-// ARM tests disabled pending fix for PR10783.
-#if !defined(__arm__)
 TEST_F(JITTest, AvailableExternallyFunctionIsntCompiled) {
   TheJIT->DisableLazyCompilation(true);
   LoadAssembly("define available_externally i32 "
@@ -737,8 +715,7 @@ TEST(LazyLoadedJITTest, EagerCompiledRecursionThroughGhost) {
     (intptr_t)TheJIT->getPointerToFunction(recur1IR));
   EXPECT_EQ(3, recur1(4));
 }
-#endif // !defined(__arm__)
-#endif // !defined(__powerpc__) && !defined(__s390__)
+#endif // !defined(__arm__) && !defined(__powerpc__) && !defined(__s390__)
 
 // 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